#line 2 "psqlscanslash.c"
#line 2 "psqlscanslash.l"
/*-------------------------------------------------------------------------
 *
 * psqlscanslash.l
 *	  lexical scanner for psql backslash commands
 *
 * XXX Avoid creating backtracking cases --- see the backend lexer for info.
 *
 * See fe_utils/psqlscan_int.h for additional commentary.
 *
 * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * IDENTIFICATION
 *	  src/bin/psql/psqlscanslash.l
 *
 *-------------------------------------------------------------------------
 */
#include "postgres_fe.h"

#include "psqlscanslash.h"
#include "conditional.h"

#include "libpq-fe.h"



#line 30 "psqlscanslash.c"

#define  YY_INT_ALIGNED short int

/* A lexical scanner generated by flex */

#define FLEX_SCANNER
#define YY_FLEX_MAJOR_VERSION 2
#define YY_FLEX_MINOR_VERSION 5
#define YY_FLEX_SUBMINOR_VERSION 39
#if YY_FLEX_SUBMINOR_VERSION > 0
#define FLEX_BETA
#endif

/* First, we deal with  platform-specific or compiler-specific issues. */

/* begin standard C headers. */
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>

/* end standard C headers. */

/* flex integer type definitions */

#ifndef FLEXINT_H
#define FLEXINT_H

/* C99 systems have <inttypes.h>. Non-C99 systems may or may not. */

#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L

/* C99 says to define __STDC_LIMIT_MACROS before including stdint.h,
 * if you want the limit (max/min) macros for int types. 
 */
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS 1
#endif

#include <inttypes.h>
typedef int8_t flex_int8_t;
typedef uint8_t flex_uint8_t;
typedef int16_t flex_int16_t;
typedef uint16_t flex_uint16_t;
typedef int32_t flex_int32_t;
typedef uint32_t flex_uint32_t;
#else
typedef signed char flex_int8_t;
typedef short int flex_int16_t;
typedef int flex_int32_t;
typedef unsigned char flex_uint8_t; 
typedef unsigned short int flex_uint16_t;
typedef unsigned int flex_uint32_t;

/* Limits of integral types. */
#ifndef INT8_MIN
#define INT8_MIN               (-128)
#endif
#ifndef INT16_MIN
#define INT16_MIN              (-32767-1)
#endif
#ifndef INT32_MIN
#define INT32_MIN              (-2147483647-1)
#endif
#ifndef INT8_MAX
#define INT8_MAX               (127)
#endif
#ifndef INT16_MAX
#define INT16_MAX              (32767)
#endif
#ifndef INT32_MAX
#define INT32_MAX              (2147483647)
#endif
#ifndef UINT8_MAX
#define UINT8_MAX              (255U)
#endif
#ifndef UINT16_MAX
#define UINT16_MAX             (65535U)
#endif
#ifndef UINT32_MAX
#define UINT32_MAX             (4294967295U)
#endif

#endif /* ! C99 */

#endif /* ! FLEXINT_H */

#ifdef __cplusplus

/* The "const" storage-class-modifier is valid. */
#define YY_USE_CONST

#else	/* ! __cplusplus */

/* C99 requires __STDC__ to be defined as 1. */
#if defined (__STDC__)

#define YY_USE_CONST

#endif	/* defined (__STDC__) */
#endif	/* ! __cplusplus */

#ifdef YY_USE_CONST
#define yyconst const
#else
#define yyconst
#endif

/* Returned upon end-of-file. */
#define YY_NULL 0

/* Promotes a possibly negative, possibly signed char to an unsigned
 * integer for use as an array index.  If the signed char is negative,
 * we want to instead treat it as an 8-bit unsigned char, hence the
 * double cast.
 */
#define YY_SC_TO_UI(c) ((unsigned int) (unsigned char) c)

/* An opaque pointer. */
#ifndef YY_TYPEDEF_YY_SCANNER_T
#define YY_TYPEDEF_YY_SCANNER_T
typedef void* yyscan_t;
#endif

/* For convenience, these vars (plus the bison vars far below)
   are macros in the reentrant scanner. */
#define yyin yyg->yyin_r
#define yyout yyg->yyout_r
#define yyextra yyg->yyextra_r
#define yyleng yyg->yyleng_r
#define yytext yyg->yytext_r
#define yylineno (YY_CURRENT_BUFFER_LVALUE->yy_bs_lineno)
#define yycolumn (YY_CURRENT_BUFFER_LVALUE->yy_bs_column)
#define yy_flex_debug yyg->yy_flex_debug_r

/* Enter a start condition.  This macro really ought to take a parameter,
 * but we do it the disgusting crufty way forced on us by the ()-less
 * definition of BEGIN.
 */
#define BEGIN yyg->yy_start = 1 + 2 *

/* Translate the current start state into a value that can be later handed
 * to BEGIN to return to the state.  The YYSTATE alias is for lex
 * compatibility.
 */
#define YY_START ((yyg->yy_start - 1) / 2)
#define YYSTATE YY_START

/* Action number for EOF rule of a given start state. */
#define YY_STATE_EOF(state) (YY_END_OF_BUFFER + state + 1)

/* Special action meaning "start processing a new file". */
#define YY_NEW_FILE slash_yyrestart(yyin ,yyscanner )

#define YY_END_OF_BUFFER_CHAR 0

/* Size of default input buffer. */
#ifndef YY_BUF_SIZE
#ifdef __ia64__
/* On IA-64, the buffer size is 16k, not 8k.
 * Moreover, YY_BUF_SIZE is 2*YY_READ_BUF_SIZE in the general case.
 * Ditto for the __ia64__ case accordingly.
 */
#define YY_BUF_SIZE 32768
#else
#define YY_BUF_SIZE 16384
#endif /* __ia64__ */
#endif

/* The state buf must be large enough to hold one state per character in the main buffer.
 */
#define YY_STATE_BUF_SIZE   ((YY_BUF_SIZE + 2) * sizeof(yy_state_type))

#ifndef YY_TYPEDEF_YY_BUFFER_STATE
#define YY_TYPEDEF_YY_BUFFER_STATE
typedef struct yy_buffer_state *YY_BUFFER_STATE;
#endif

#ifndef YY_TYPEDEF_YY_SIZE_T
#define YY_TYPEDEF_YY_SIZE_T
typedef size_t yy_size_t;
#endif

#define EOB_ACT_CONTINUE_SCAN 0
#define EOB_ACT_END_OF_FILE 1
#define EOB_ACT_LAST_MATCH 2

    #define YY_LESS_LINENO(n)
    #define YY_LINENO_REWIND_TO(ptr)
    
/* Return all but the first "n" matched characters back to the input stream. */
#define yyless(n) \
	do \
		{ \
		/* Undo effects of setting up yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
		*yy_cp = yyg->yy_hold_char; \
		YY_RESTORE_YY_MORE_OFFSET \
		yyg->yy_c_buf_p = yy_cp = yy_bp + yyless_macro_arg - YY_MORE_ADJ; \
		YY_DO_BEFORE_ACTION; /* set up yytext again */ \
		} \
	while ( 0 )

#define unput(c) yyunput( c, yyg->yytext_ptr , yyscanner )

#ifndef YY_STRUCT_YY_BUFFER_STATE
#define YY_STRUCT_YY_BUFFER_STATE
struct yy_buffer_state
	{
	FILE *yy_input_file;

	char *yy_ch_buf;		/* input buffer */
	char *yy_buf_pos;		/* current position in input buffer */

	/* Size of input buffer in bytes, not including room for EOB
	 * characters.
	 */
	yy_size_t yy_buf_size;

	/* Number of characters read into yy_ch_buf, not including EOB
	 * characters.
	 */
	yy_size_t yy_n_chars;

	/* Whether we "own" the buffer - i.e., we know we created it,
	 * and can realloc() it to grow it, and should free() it to
	 * delete it.
	 */
	int yy_is_our_buffer;

	/* Whether this is an "interactive" input source; if so, and
	 * if we're using stdio for input, then we want to use getc()
	 * instead of fread(), to make sure we stop fetching input after
	 * each newline.
	 */
	int yy_is_interactive;

	/* Whether we're considered to be at the beginning of a line.
	 * If so, '^' rules will be active on the next match, otherwise
	 * not.
	 */
	int yy_at_bol;

    int yy_bs_lineno; /**< The line count. */
    int yy_bs_column; /**< The column count. */
    
	/* Whether to try to fill the input buffer when we reach the
	 * end of it.
	 */
	int yy_fill_buffer;

	int yy_buffer_status;

#define YY_BUFFER_NEW 0
#define YY_BUFFER_NORMAL 1
	/* When an EOF's been seen but there's still some text to process
	 * then we mark the buffer as YY_EOF_PENDING, to indicate that we
	 * shouldn't try reading from the input source any more.  We might
	 * still have a bunch of tokens to match, though, because of
	 * possible backing-up.
	 *
	 * When we actually see the EOF, we change the status to "new"
	 * (via slash_yyrestart()), so that the user can continue scanning by
	 * just pointing yyin at a new input file.
	 */
#define YY_BUFFER_EOF_PENDING 2

	};
#endif /* !YY_STRUCT_YY_BUFFER_STATE */

/* We provide macros for accessing buffer states in case in the
 * future we want to put the buffer states in a more general
 * "scanner state".
 *
 * Returns the top of the stack, or NULL.
 */
#define YY_CURRENT_BUFFER ( yyg->yy_buffer_stack \
                          ? yyg->yy_buffer_stack[yyg->yy_buffer_stack_top] \
                          : NULL)

/* Same as previous macro, but useful when we know that the buffer stack is not
 * NULL or when we need an lvalue. For internal use only.
 */
#define YY_CURRENT_BUFFER_LVALUE yyg->yy_buffer_stack[yyg->yy_buffer_stack_top]

void slash_yyrestart (FILE *input_file ,yyscan_t yyscanner );
void slash_yy_switch_to_buffer (YY_BUFFER_STATE new_buffer ,yyscan_t yyscanner );
YY_BUFFER_STATE slash_yy_create_buffer (FILE *file,int size ,yyscan_t yyscanner );
void slash_yy_delete_buffer (YY_BUFFER_STATE b ,yyscan_t yyscanner );
void slash_yy_flush_buffer (YY_BUFFER_STATE b ,yyscan_t yyscanner );
void slash_yypush_buffer_state (YY_BUFFER_STATE new_buffer ,yyscan_t yyscanner );
void slash_yypop_buffer_state (yyscan_t yyscanner );

static void slash_yyensure_buffer_stack (yyscan_t yyscanner );
static void slash_yy_load_buffer_state (yyscan_t yyscanner );
static void slash_yy_init_buffer (YY_BUFFER_STATE b,FILE *file ,yyscan_t yyscanner );

#define YY_FLUSH_BUFFER slash_yy_flush_buffer(YY_CURRENT_BUFFER ,yyscanner)

YY_BUFFER_STATE slash_yy_scan_buffer (char *base,yy_size_t size ,yyscan_t yyscanner );
YY_BUFFER_STATE slash_yy_scan_string (yyconst char *yy_str ,yyscan_t yyscanner );
YY_BUFFER_STATE slash_yy_scan_bytes (yyconst char *bytes,yy_size_t len ,yyscan_t yyscanner );

void *slash_yyalloc (yy_size_t ,yyscan_t yyscanner );
void *slash_yyrealloc (void *,yy_size_t ,yyscan_t yyscanner );
void slash_yyfree (void * ,yyscan_t yyscanner );

#define yy_new_buffer slash_yy_create_buffer

#define yy_set_interactive(is_interactive) \
	{ \
	if ( ! YY_CURRENT_BUFFER ){ \
        slash_yyensure_buffer_stack (yyscanner); \
		YY_CURRENT_BUFFER_LVALUE =    \
            slash_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner); \
	} \
	YY_CURRENT_BUFFER_LVALUE->yy_is_interactive = is_interactive; \
	}

#define yy_set_bol(at_bol) \
	{ \
	if ( ! YY_CURRENT_BUFFER ){\
        slash_yyensure_buffer_stack (yyscanner); \
		YY_CURRENT_BUFFER_LVALUE =    \
            slash_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner); \
	} \
	YY_CURRENT_BUFFER_LVALUE->yy_at_bol = at_bol; \
	}

#define YY_AT_BOL() (YY_CURRENT_BUFFER_LVALUE->yy_at_bol)

/* Begin user sect3 */

#define slash_yywrap(yyscanner) 1
#define YY_SKIP_YYWRAP

typedef unsigned char YY_CHAR;

typedef int yy_state_type;

#define yytext_ptr yytext_r

static yyconst flex_int16_t yy_nxt[][19] =
    {
    {
        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
        0,    0,    0,    0,    0,    0,    0,    0,    0
    },

    {
       19,   20,   20,   20,   20,   20,   20,   20,   20,   20,
       20,   20,   20,   20,   20,   20,   20,   20,   20
    },

    {
       19,   20,   20,   20,   20,   20,   20,   20,   20,   20,
       20,   20,   20,   20,   20,   20,   20,   20,   20
    },

    {
       19,   21,   22,   23,   21,   21,   21,   21,   21,   21,
       22,   21,   21,   21,   21,   21,   21,   21,   21
    },

    {
       19,   21,   22,   23,   21,   21,   21,   21,   21,   21,
       22,   21,   21,   21,   21,   21,   21,   21,   21

    },

    {
       19,   24,   25,   26,   24,   24,   24,   24,   24,   24,
       24,   24,   24,   24,   24,   24,   24,   24,   27
    },

    {
       19,   24,   25,   26,   24,   24,   24,   24,   24,   24,
       24,   24,   24,   24,   24,   24,   24,   24,   27
    },

    {
       19,   28,   29,   30,   31,   32,   28,   28,   33,   28,
       29,   34,   28,   28,   28,   28,   28,   28,   28
    },

    {
       19,   28,   29,   30,   31,   32,   28,   28,   33,   28,
       29,   34,   28,   28,   28,   28,   28,   28,   28
    },

    {
       19,   35,   35,   35,   35,   36,   35,   35,   35,   35,
       37,   35,   35,   35,   35,   35,   35,   35,   35

    },

    {
       19,   35,   35,   35,   35,   36,   35,   35,   35,   35,
       37,   35,   35,   35,   35,   35,   35,   35,   35
    },

    {
       19,   38,   38,   38,   38,   38,   38,   38,   39,   38,
       38,   40,   38,   38,   38,   38,   38,   38,   38
    },

    {
       19,   38,   38,   38,   38,   38,   38,   38,   39,   38,
       38,   40,   38,   38,   38,   38,   38,   38,   38
    },

    {
       19,   41,   41,   41,   42,   41,   41,   41,   41,   41,
       41,   41,   41,   41,   41,   41,   41,   41,   41
    },

    {
       19,   41,   41,   41,   42,   41,   41,   41,   41,   41,
       41,   41,   41,   41,   41,   41,   41,   41,   41

    },

    {
       19,   43,   44,   45,   43,   43,   43,   43,   43,   43,
       43,   43,   43,   43,   43,   43,   43,   43,   43
    },

    {
       19,   43,   44,   45,   43,   43,   43,   43,   43,   43,
       43,   43,   43,   43,   43,   43,   43,   43,   43
    },

    {
       19,   46,   46,   46,   46,   46,   46,   46,   46,   46,
       47,   46,   46,   46,   46,   46,   46,   46,   46
    },

    {
       19,   46,   46,   46,   46,   46,   46,   46,   46,   46,
       47,   46,   46,   46,   46,   46,   46,   46,   46
    },

    {
      -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,
      -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19,  -19

    },

    {
       19,  -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,
      -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20,  -20
    },

    {
       19,  -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21,
      -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21,  -21
    },

    {
       19,  -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22,
      -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22,  -22
    },

    {
       19,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,
      -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23,  -23
    },

    {
       19,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,
      -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24,  -24

    },

    {
       19,  -25,   48,   48,  -25,  -25,  -25,  -25,  -25,  -25,
      -25,  -25,  -25,  -25,  -25,  -25,  -25,  -25,  -25
    },

    {
       19,  -26,   48,   48,  -26,  -26,  -26,  -26,  -26,  -26,
      -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26,  -26
    },

    {
       19,  -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,
      -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27,  -27
    },

    {
       19,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,
      -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28,  -28
    },

    {
       19,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,
      -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29,  -29

    },

    {
       19,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,
      -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30,  -30
    },

    {
       19,  -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31,
      -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31,  -31
    },

    {
       19,  -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,
      -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32,  -32
    },

    {
       19,  -33,  -33,  -33,   49,   50,   51,   51,  -33,   51,
      -33,  -33,   51,   51,   51,   51,   51,   51,  -33
    },

    {
       19,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,
      -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34,  -34

    },

    {
       19,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,
      -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35,  -35
    },

    {
       19,  -36,  -36,  -36,  -36,   52,  -36,  -36,  -36,  -36,
      -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36,  -36
    },

    {
       19,   53,   53,  -37,   53,   53,   54,   53,   53,   53,
       53,   53,   55,   56,   57,   58,   59,   60,   53
    },

    {
       19,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,
      -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38,  -38
    },

    {
       19,  -39,  -39,  -39,  -39,   61,   62,   62,  -39,   62,
      -39,  -39,   62,   62,   62,   62,   62,   62,  -39

    },

    {
       19,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,
      -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40,  -40
    },

    {
       19,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,
      -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41,  -41
    },

    {
       19,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,
      -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42,  -42
    },

    {
       19,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,
      -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43,  -43
    },

    {
       19,  -44,   63,   63,  -44,  -44,  -44,  -44,  -44,  -44,
      -44,  -44,  -44,  -44,  -44,  -44,  -44,  -44,  -44

    },

    {
       19,  -45,   63,   63,  -45,  -45,  -45,  -45,  -45,  -45,
      -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45,  -45
    },

    {
       19,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,
      -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46,  -46
    },

    {
       19,  -47,  -47,  -47,  -47,  -47,  -47,  -47,  -47,  -47,
       64,  -47,  -47,  -47,  -47,  -47,  -47,  -47,  -47
    },

    {
       19,  -48,   48,   48,  -48,  -48,  -48,  -48,  -48,  -48,
      -48,  -48,  -48,  -48,  -48,  -48,  -48,  -48,  -48
    },

    {
       19,  -49,  -49,  -49,  -49,  -49,   65,   65,  -49,   65,
      -49,  -49,   65,   65,   65,   65,   65,   65,  -49

    },

    {
       19,  -50,  -50,  -50,  -50,  -50,   66,   66,  -50,   66,
      -50,  -50,   66,   66,   66,   66,   66,   66,  -50
    },

    {
       19,  -51,  -51,  -51,  -51,  -51,   51,   51,  -51,   51,
      -51,  -51,   51,   51,   51,   51,   51,   51,  -51
    },

    {
       19,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,
      -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52,  -52
    },

    {
       19,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,
      -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53,  -53
    },

    {
       19,  -54,  -54,  -54,  -54,  -54,   67,  -54,  -54,  -54,
      -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54,  -54

    },

    {
       19,  -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,
      -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55,  -55
    },

    {
       19,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,
      -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56,  -56
    },

    {
       19,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,
      -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57,  -57
    },

    {
       19,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,
      -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58,  -58
    },

    {
       19,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,
      -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59,  -59

    },

    {
       19,  -60,  -60,  -60,  -60,  -60,   68,   68,  -60,  -60,
      -60,  -60,   68,   68,  -60,  -60,  -60,  -60,  -60
    },

    {
       19,  -61,  -61,  -61,  -61,  -61,   69,   69,  -61,   69,
      -61,  -61,   69,   69,   69,   69,   69,   69,  -61
    },

    {
       19,  -62,  -62,  -62,  -62,  -62,   62,   62,  -62,   62,
      -62,  -62,   62,   62,   62,   62,   62,   62,  -62
    },

    {
       19,  -63,   63,   63,  -63,  -63,  -63,  -63,  -63,  -63,
      -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63,  -63
    },

    {
       19,  -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,
      -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64,  -64

    },

    {
       19,  -65,  -65,  -65,   70,  -65,   65,   65,  -65,   65,
      -65,  -65,   65,   65,   65,   65,   65,   65,  -65
    },

    {
       19,  -66,  -66,  -66,  -66,   71,   66,   66,  -66,   66,
      -66,  -66,   66,   66,   66,   66,   66,   66,  -66
    },

    {
       19,  -67,  -67,  -67,  -67,  -67,   72,  -67,  -67,  -67,
      -67,  -67,  -67,  -67,  -67,  -67,  -67,  -67,  -67
    },

    {
       19,  -68,  -68,  -68,  -68,  -68,   73,   73,  -68,  -68,
      -68,  -68,   73,   73,  -68,  -68,  -68,  -68,  -68
    },

    {
       19,  -69,  -69,  -69,  -69,   74,   69,   69,  -69,   69,
      -69,  -69,   69,   69,   69,   69,   69,   69,  -69

    },

    {
       19,  -70,  -70,  -70,  -70,  -70,  -70,  -70,  -70,  -70,
      -70,  -70,  -70,  -70,  -70,  -70,  -70,  -70,  -70
    },

    {
       19,  -71,  -71,  -71,  -71,  -71,  -71,  -71,  -71,  -71,
      -71,  -71,  -71,  -71,  -71,  -71,  -71,  -71,  -71
    },

    {
       19,  -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72,
      -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72,  -72
    },

    {
       19,  -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73,
      -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73,  -73
    },

    {
       19,  -74,  -74,  -74,  -74,  -74,  -74,  -74,  -74,  -74,
      -74,  -74,  -74,  -74,  -74,  -74,  -74,  -74,  -74

    },

    } ;

static yy_state_type yy_get_previous_state (yyscan_t yyscanner );
static yy_state_type yy_try_NUL_trans (yy_state_type current_state  ,yyscan_t yyscanner);
static int yy_get_next_buffer (yyscan_t yyscanner );
static void yy_fatal_error (yyconst char msg[] ,yyscan_t yyscanner );

/* Done after the current pattern has been matched and before the
 * corresponding action - sets up yytext.
 */
#define YY_DO_BEFORE_ACTION \
	yyg->yytext_ptr = yy_bp; \
	yyleng = (size_t) (yy_cp - yy_bp); \
	yyg->yy_hold_char = *yy_cp; \
	*yy_cp = '\0'; \
	yyg->yy_c_buf_p = yy_cp;

#define YY_NUM_RULES 39
#define YY_END_OF_BUFFER 40
/* This struct is not used in this scanner,
   but its presence is necessary. */
struct yy_trans_info
	{
	flex_int32_t yy_verify;
	flex_int32_t yy_nxt;
	};
static yyconst flex_int16_t yy_accept[75] =
    {   0,
        0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
        0,    0,    0,    0,    0,    0,    0,    0,   40,    1,
        3,    2,    2,    6,    4,    4,    5,   16,    7,    7,
       10,    8,   16,    9,   27,   17,   27,   32,   32,   28,
       34,   33,   36,   35,   35,   38,   38,    4,   15,   14,
       11,   18,   26,   24,   21,   23,   19,   22,   20,   26,
       31,   29,   35,   37,   15,   14,   24,   25,   31,   13,
       12,   24,   25,   30
    } ;

static yyconst flex_int32_t yy_ec[256] =
    {   0,
        1,    1,    1,    1,    1,    1,    1,    1,    2,    3,
        1,    2,    2,    1,    1,    1,    1,    1,    1,    1,
        1,    1,    1,    1,    1,    1,    1,    1,    1,    1,
        1,    2,    1,    4,    1,    1,    1,    1,    5,    1,
        1,    1,    1,    1,    1,    1,    1,    6,    6,    6,
        6,    6,    6,    6,    6,    7,    7,    8,    1,    1,
        1,    1,    1,    1,    7,    7,    7,    7,    7,    7,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        1,   10,    1,    1,    9,   11,    7,   12,    7,    7,

        7,   13,    9,    9,    9,    9,    9,    9,    9,   14,
        9,    9,    9,   15,    9,   16,    9,    9,    9,   17,
        9,    9,    1,   18,    1,    1,    1,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,

        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9,    9,    9,    9,    9,    9,
        9,    9,    9,    9,    9
    } ;

/* The intent behind this definition is that it'll catch
 * any uses of REJECT which flex missed.
 */
#define REJECT reject_used_but_not_detected
#define yymore() yymore_used_but_not_detected
#define YY_MORE_ADJ 0
#define YY_RESTORE_YY_MORE_OFFSET
#line 1 "psqlscanslash.l"

#line 28 "psqlscanslash.l"
#include "fe_utils/psqlscan_int.h"

/*
 * We must have a typedef YYSTYPE for slash_yylex's first argument, but this lexer
 * doesn't presently make use of that argument, so just declare it as int.
 */
typedef int YYSTYPE;

/*
 * Set the type of yyextra; we use it as a pointer back to the containing
 * PsqlScanState.
 */
#define YY_EXTRA_TYPE PsqlScanState

/*
 * These variables do not need to be saved across calls.  Yeah, it's a bit
 * of a hack, but putting them into PsqlScanStateData would be klugy too.
 */
static enum slash_option_type option_type;
static char *option_quote;
static int	unquoted_option_chars;
static int	backtick_start_offset;


/* Return values from slash_yylex() */
#define LEXRES_EOL			0	/* end of input */
#define LEXRES_OK			1	/* OK completion of backslash argument */


static void evaluate_backtick(PsqlScanState state);

#define ECHO psqlscan_emit(cur_state, yytext, yyleng)

/*
 * Work around a bug in flex 2.5.35: it emits a couple of functions that
 * it forgets to emit declarations for.  Since we use -Wmissing-prototypes,
 * this would cause warnings.  Providing our own declarations should be
 * harmless even when the bug gets fixed.
 */
extern int	slash_yyget_column(yyscan_t yyscanner);
extern void slash_yyset_column(int column_no, yyscan_t yyscanner);

/* Except for the prefix, these options should match psqlscan.l */
#define YY_NO_INPUT 1
/*
 * OK, here is a short description of lex/flex rules behavior.
 * The longest pattern which matches an input string is always chosen.
 * For equal-length patterns, the first occurring in the rules list is chosen.
 * INITIAL is the starting state, to which all non-conditional rules apply.
 * Exclusive states change parsing rules while the state is active.  When in
 * an exclusive state, only those rules defined for that state apply.
 */
/* Exclusive states for lexing backslash commands */








/*
 * Assorted character class definitions that should match psqlscan.l.
 */
#line 910 "psqlscanslash.c"

#define INITIAL 0
#define xslashcmd 1
#define xslashargstart 2
#define xslasharg 3
#define xslashquote 4
#define xslashbackquote 5
#define xslashdquote 6
#define xslashwholeline 7
#define xslashend 8

#ifndef YY_NO_UNISTD_H
/* Special case for "unistd.h", since it is non-ANSI. We include it way
 * down here because we want the user's section 1 to have been scanned first.
 * The user has a chance to override it with an option.
 */
#include <unistd.h>
#endif

#ifndef YY_EXTRA_TYPE
#define YY_EXTRA_TYPE void *
#endif

/* Holds the entire state of the reentrant scanner. */
struct yyguts_t
    {

    /* User-defined. Not touched by flex. */
    YY_EXTRA_TYPE yyextra_r;

    /* The rest are the same as the globals declared in the non-reentrant scanner. */
    FILE *yyin_r, *yyout_r;
    size_t yy_buffer_stack_top; /**< index of top of stack. */
    size_t yy_buffer_stack_max; /**< capacity of stack. */
    YY_BUFFER_STATE * yy_buffer_stack; /**< Stack as an array. */
    char yy_hold_char;
    yy_size_t yy_n_chars;
    yy_size_t yyleng_r;
    char *yy_c_buf_p;
    int yy_init;
    int yy_start;
    int yy_did_buffer_switch_on_eof;
    int yy_start_stack_ptr;
    int yy_start_stack_depth;
    int *yy_start_stack;
    yy_state_type yy_last_accepting_state;
    char* yy_last_accepting_cpos;

    int yylineno_r;
    int yy_flex_debug_r;

    char *yytext_r;
    int yy_more_flag;
    int yy_more_len;

    YYSTYPE * yylval_r;

    }; /* end struct yyguts_t */

static int yy_init_globals (yyscan_t yyscanner );

    /* This must go here because YYSTYPE and YYLTYPE are included
     * from bison output in section 1.*/
    #    define yylval yyg->yylval_r
    
int slash_yylex_init (yyscan_t* scanner);

int slash_yylex_init_extra (YY_EXTRA_TYPE user_defined,yyscan_t* scanner);

/* Accessor methods to globals.
   These are made visible to non-reentrant scanners for convenience. */

int slash_yylex_destroy (yyscan_t yyscanner );

int slash_yyget_debug (yyscan_t yyscanner );

void slash_yyset_debug (int debug_flag ,yyscan_t yyscanner );

YY_EXTRA_TYPE slash_yyget_extra (yyscan_t yyscanner );

void slash_yyset_extra (YY_EXTRA_TYPE user_defined ,yyscan_t yyscanner );

FILE *slash_yyget_in (yyscan_t yyscanner );

void slash_yyset_in  (FILE * in_str ,yyscan_t yyscanner );

FILE *slash_yyget_out (yyscan_t yyscanner );

void slash_yyset_out  (FILE * out_str ,yyscan_t yyscanner );

yy_size_t slash_yyget_leng (yyscan_t yyscanner );

char *slash_yyget_text (yyscan_t yyscanner );

int slash_yyget_lineno (yyscan_t yyscanner );

void slash_yyset_lineno (int line_number ,yyscan_t yyscanner );

int slash_yyget_column  (yyscan_t yyscanner );

void slash_yyset_column (int column_no ,yyscan_t yyscanner );

YYSTYPE * slash_yyget_lval (yyscan_t yyscanner );

void slash_yyset_lval (YYSTYPE * yylval_param ,yyscan_t yyscanner );

/* Macros after this point can all be overridden by user definitions in
 * section 1.
 */

#ifndef YY_SKIP_YYWRAP
#ifdef __cplusplus
extern "C" int slash_yywrap (yyscan_t yyscanner );
#else
extern int slash_yywrap (yyscan_t yyscanner );
#endif
#endif

#ifndef yytext_ptr
static void yy_flex_strncpy (char *,yyconst char *,int ,yyscan_t yyscanner);
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen (yyconst char * ,yyscan_t yyscanner);
#endif

#ifndef YY_NO_INPUT

#ifdef __cplusplus
static int yyinput (yyscan_t yyscanner );
#else
static int input (yyscan_t yyscanner );
#endif

#endif

/* Amount of stuff to slurp up with each read. */
#ifndef YY_READ_BUF_SIZE
#ifdef __ia64__
/* On IA-64, the buffer size is 16k, not 8k */
#define YY_READ_BUF_SIZE 16384
#else
#define YY_READ_BUF_SIZE 8192
#endif /* __ia64__ */
#endif

/* Copy whatever the last rule matched to the standard output. */
#ifndef ECHO
/* This used to be an fputs(), but since the string might contain NUL's,
 * we now use fwrite().
 */
#define ECHO do { if (fwrite( yytext, yyleng, 1, yyout )) {} } while (0)
#endif

/* Gets input and stuffs it into "buf".  number of characters read, or YY_NULL,
 * is returned in "result".
 */
#ifndef YY_INPUT
#define YY_INPUT(buf,result,max_size) \
	if ( YY_CURRENT_BUFFER_LVALUE->yy_is_interactive ) \
		{ \
		int c = '*'; \
		int n; \
		for ( n = 0; n < max_size && \
			     (c = getc( yyin )) != EOF && c != '\n'; ++n ) \
			buf[n] = (char) c; \
		if ( c == '\n' ) \
			buf[n++] = (char) c; \
		if ( c == EOF && ferror( yyin ) ) \
			YY_FATAL_ERROR( "input in flex scanner failed" ); \
		result = n; \
		} \
	else \
		{ \
		errno=0; \
		while ( (result = fread(buf, 1, (yy_size_t) max_size, yyin)) == 0 && ferror(yyin)) \
			{ \
			if( errno != EINTR) \
				{ \
				YY_FATAL_ERROR( "input in flex scanner failed" ); \
				break; \
				} \
			errno=0; \
			clearerr(yyin); \
			} \
		}\
\

#endif

/* No semi-colon after return; correct usage is to write "yyterminate();" -
 * we don't want an extra ';' after the "return" because that will cause
 * some compilers to complain about unreachable statements.
 */
#ifndef yyterminate
#define yyterminate() return YY_NULL
#endif

/* Number of entries by which start-condition stack grows. */
#ifndef YY_START_STACK_INCR
#define YY_START_STACK_INCR 25
#endif

/* Report a fatal error. */
#ifndef YY_FATAL_ERROR
#define YY_FATAL_ERROR(msg) yy_fatal_error( msg , yyscanner)
#endif

/* end tables serialization structures and prototypes */

/* Default declaration of generated scanner - a define so the user can
 * easily add parameters.
 */
#ifndef YY_DECL
#define YY_DECL_IS_OURS 1

extern int slash_yylex \
               (YYSTYPE * yylval_param ,yyscan_t yyscanner);

#define YY_DECL int slash_yylex \
               (YYSTYPE * yylval_param , yyscan_t yyscanner)
#endif /* !YY_DECL */

/* Code executed at the beginning of each rule, after yytext and yyleng
 * have been set up.
 */
#ifndef YY_USER_ACTION
#define YY_USER_ACTION
#endif

/* Code executed at the end of each rule. */
#ifndef YY_BREAK
#define YY_BREAK break;
#endif

#define YY_RULE_SETUP \
	YY_USER_ACTION

/** The main scanner function which does all the work.
 */
YY_DECL
{
	register yy_state_type yy_current_state;
	register char *yy_cp, *yy_bp;
	register int yy_act;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

    yylval = yylval_param;

	if ( !yyg->yy_init )
		{
		yyg->yy_init = 1;

#ifdef YY_USER_INIT
		YY_USER_INIT;
#endif

		if ( ! yyg->yy_start )
			yyg->yy_start = 1;	/* first start state */

		if ( ! yyin )
			yyin = stdin;

		if ( ! yyout )
			yyout = stdout;

		if ( ! YY_CURRENT_BUFFER ) {
			slash_yyensure_buffer_stack (yyscanner);
			YY_CURRENT_BUFFER_LVALUE =
				slash_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner);
		}

		slash_yy_load_buffer_state(yyscanner );
		}

	{
#line 116 "psqlscanslash.l"



		/* Declare some local variables inside slash_yylex(), for convenience */
		PsqlScanState cur_state = yyextra;
		PQExpBuffer output_buf = cur_state->output_buf;

		/*
		 * Force flex into the state indicated by start_state.  This has a
		 * couple of purposes: it lets some of the functions below set a new
		 * starting state without ugly direct access to flex variables, and it
		 * allows us to transition from one flex lexer to another so that we
		 * can lex different parts of the source string using separate lexers.
		 */
		BEGIN(cur_state->start_state);


	/*
	 * We don't really expect to be invoked in the INITIAL state in this
	 * lexer; but if we are, just spit data to the output_buf until EOF.
	 */

#line 1210 "psqlscanslash.c"

	while ( 1 )		/* loops until end-of-file is reached */
		{
		yy_cp = yyg->yy_c_buf_p;

		/* Support of yytext. */
		*yy_cp = yyg->yy_hold_char;

		/* yy_bp points to the position in yy_ch_buf of the start of
		 * the current run.
		 */
		yy_bp = yy_cp;

		yy_current_state = yyg->yy_start;
yy_match:
		while ( (yy_current_state = yy_nxt[yy_current_state][ yy_ec[YY_SC_TO_UI(*yy_cp)]  ]) > 0 )
			++yy_cp;

		yy_current_state = -yy_current_state;

yy_find_action:
		yy_act = yy_accept[yy_current_state];

		YY_DO_BEFORE_ACTION;

do_action:	/* This label is used only to access EOF actions. */

		switch ( yy_act )
	{ /* beginning of action switch */
case 1:
/* rule 1 can match eol */
YY_RULE_SETUP
#line 138 "psqlscanslash.l"
{ ECHO; }
	YY_BREAK
/*
	 * Exclusive lexer states to handle backslash command lexing
	 */

/* command name ends at whitespace or backslash; eat all else */
case 2:
/* rule 2 can match eol */
YY_RULE_SETUP
#line 147 "psqlscanslash.l"
{
					yyless(0);
					cur_state->start_state = YY_START;
					return LEXRES_OK;
				}
	YY_BREAK
case 3:
YY_RULE_SETUP
#line 153 "psqlscanslash.l"
{ ECHO; }
	YY_BREAK


/*
	 * Discard any whitespace before argument, then go to xslasharg state.
	 * An exception is that "|" is only special at start of argument, so we
	 * check for it here.
	 */
case 4:
/* rule 4 can match eol */
YY_RULE_SETUP
#line 164 "psqlscanslash.l"
{ }
	YY_BREAK
case 5:
YY_RULE_SETUP
#line 166 "psqlscanslash.l"
{
					if (option_type == OT_FILEPIPE)
					{
						/* treat like whole-string case */
						ECHO;
						BEGIN(xslashwholeline);
					}
					else
					{
						/* vertical bar is not special otherwise */
						yyless(0);
						BEGIN(xslasharg);
					}
				}
	YY_BREAK
case 6:
YY_RULE_SETUP
#line 181 "psqlscanslash.l"
{
					yyless(0);
					BEGIN(xslasharg);
				}
	YY_BREAK


/*
	 * Default processing of text in a slash command's argument.
	 *
	 * Note: unquoted_option_chars counts the number of characters at the
	 * end of the argument that were not subject to any form of quoting.
	 * psql_scan_slash_option needs this to strip trailing semicolons safely.
	 */
case 7:
/* rule 7 can match eol */
YY_RULE_SETUP
#line 197 "psqlscanslash.l"
{
					/*
					 * Unquoted space is end of arg; do not eat.  Likewise
					 * backslash is end of command or next command, do not eat
					 *
					 * XXX this means we can't conveniently accept options
					 * that include unquoted backslashes; therefore, option
					 * processing that encourages use of backslashes is rather
					 * broken.
					 */
					yyless(0);
					cur_state->start_state = YY_START;
					return LEXRES_OK;
				}
	YY_BREAK
case 8:
YY_RULE_SETUP
#line 212 "psqlscanslash.l"
{
					*option_quote = '\'';
					unquoted_option_chars = 0;
					BEGIN(xslashquote);
				}
	YY_BREAK
case 9:
YY_RULE_SETUP
#line 218 "psqlscanslash.l"
{
					backtick_start_offset = output_buf->len;
					*option_quote = '`';
					unquoted_option_chars = 0;
					BEGIN(xslashbackquote);
				}
	YY_BREAK
case 10:
YY_RULE_SETUP
#line 225 "psqlscanslash.l"
{
					ECHO;
					*option_quote = '"';
					unquoted_option_chars = 0;
					BEGIN(xslashdquote);
				}
	YY_BREAK
case 11:
YY_RULE_SETUP
#line 232 "psqlscanslash.l"
{
					/* Possible psql variable substitution */
					if (cur_state->callbacks->get_variable == NULL)
						ECHO;
					else
					{
						char	   *varname;
						char	   *value;

						varname = psqlscan_extract_substring(cur_state,
															 yytext + 1,
															 yyleng - 1);
						value = cur_state->callbacks->get_variable(varname,
																   PQUOTE_PLAIN,
																   cur_state->cb_passthrough);
						free(varname);

						/*
						 * The variable value is just emitted without any
						 * further examination.  This is consistent with the
						 * pre-8.0 code behavior, if not with the way that
						 * variables are handled outside backslash commands.
						 * Note that we needn't guard against recursion here.
						 */
						if (value)
						{
							appendPQExpBufferStr(output_buf, value);
							free(value);
						}
						else
							ECHO;

						*option_quote = ':';
					}
					unquoted_option_chars = 0;
				}
	YY_BREAK
case 12:
YY_RULE_SETUP
#line 269 "psqlscanslash.l"
{
					psqlscan_escape_variable(cur_state, yytext, yyleng,
											 PQUOTE_SQL_LITERAL);
					*option_quote = ':';
					unquoted_option_chars = 0;
				}
	YY_BREAK
case 13:
YY_RULE_SETUP
#line 277 "psqlscanslash.l"
{
					psqlscan_escape_variable(cur_state, yytext, yyleng,
											 PQUOTE_SQL_IDENT);
					*option_quote = ':';
					unquoted_option_chars = 0;
				}
	YY_BREAK
case 14:
YY_RULE_SETUP
#line 284 "psqlscanslash.l"
{
					/* Throw back everything but the colon */
					yyless(1);
					unquoted_option_chars++;
					ECHO;
				}
	YY_BREAK
case 15:
YY_RULE_SETUP
#line 291 "psqlscanslash.l"
{
					/* Throw back everything but the colon */
					yyless(1);
					unquoted_option_chars++;
					ECHO;
				}
	YY_BREAK
case 16:
YY_RULE_SETUP
#line 298 "psqlscanslash.l"
{
					unquoted_option_chars++;
					ECHO;
				}
	YY_BREAK


/*
	 * single-quoted text: copy literally except for '' and backslash
	 * sequences
	 */
case 17:
YY_RULE_SETUP
#line 311 "psqlscanslash.l"
{ BEGIN(xslasharg); }
	YY_BREAK
case 18:
YY_RULE_SETUP
#line 313 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\''); }
	YY_BREAK
case 19:
YY_RULE_SETUP
#line 315 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\n'); }
	YY_BREAK
case 20:
YY_RULE_SETUP
#line 316 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\t'); }
	YY_BREAK
case 21:
YY_RULE_SETUP
#line 317 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\b'); }
	YY_BREAK
case 22:
YY_RULE_SETUP
#line 318 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\r'); }
	YY_BREAK
case 23:
YY_RULE_SETUP
#line 319 "psqlscanslash.l"
{ appendPQExpBufferChar(output_buf, '\f'); }
	YY_BREAK
case 24:
YY_RULE_SETUP
#line 321 "psqlscanslash.l"
{
					/* octal case */
					appendPQExpBufferChar(output_buf,
										  (char) strtol(yytext + 1, NULL, 8));
				}
	YY_BREAK
case 25:
YY_RULE_SETUP
#line 327 "psqlscanslash.l"
{
					/* hex case */
					appendPQExpBufferChar(output_buf,
										  (char) strtol(yytext + 2, NULL, 16));
				}
	YY_BREAK
case 26:
YY_RULE_SETUP
#line 333 "psqlscanslash.l"
{ psqlscan_emit(cur_state, yytext + 1, 1); }
	YY_BREAK
case 27:
/* rule 27 can match eol */
YY_RULE_SETUP
#line 335 "psqlscanslash.l"
{ ECHO; }
	YY_BREAK


/*
	 * backticked text: copy everything until next backquote (expanding
	 * variable references, but doing nought else), then evaluate.
	 */
case 28:
YY_RULE_SETUP
#line 345 "psqlscanslash.l"
{
					/* In an inactive \if branch, don't evaluate the command */
					if (cur_state->cb_passthrough == NULL ||
						conditional_active((ConditionalStack) cur_state->cb_passthrough))
						evaluate_backtick(cur_state);
					BEGIN(xslasharg);
				}
	YY_BREAK
case 29:
YY_RULE_SETUP
#line 353 "psqlscanslash.l"
{
					/* Possible psql variable substitution */
					if (cur_state->callbacks->get_variable == NULL)
						ECHO;
					else
					{
						char	   *varname;
						char	   *value;

						varname = psqlscan_extract_substring(cur_state,
															 yytext + 1,
															 yyleng - 1);
						value = cur_state->callbacks->get_variable(varname,
																   PQUOTE_PLAIN,
																   cur_state->cb_passthrough);
						free(varname);

						if (value)
						{
							appendPQExpBufferStr(output_buf, value);
							free(value);
						}
						else
							ECHO;
					}
				}
	YY_BREAK
case 30:
YY_RULE_SETUP
#line 380 "psqlscanslash.l"
{
					psqlscan_escape_variable(cur_state, yytext, yyleng,
											 PQUOTE_SHELL_ARG);
				}
	YY_BREAK
case 31:
YY_RULE_SETUP
#line 385 "psqlscanslash.l"
{
					/* Throw back everything but the colon */
					yyless(1);
					ECHO;
				}
	YY_BREAK
case 32:
/* rule 32 can match eol */
YY_RULE_SETUP
#line 391 "psqlscanslash.l"
{ ECHO; }
	YY_BREAK


/* double-quoted text: copy verbatim, including the double quotes */
case 33:
YY_RULE_SETUP
#line 398 "psqlscanslash.l"
{
					ECHO;
					BEGIN(xslasharg);
				}
	YY_BREAK
case 34:
/* rule 34 can match eol */
YY_RULE_SETUP
#line 403 "psqlscanslash.l"
{ ECHO; }
	YY_BREAK


/* copy everything until end of input line */
/* but suppress leading whitespace */
case 35:
/* rule 35 can match eol */
YY_RULE_SETUP
#line 411 "psqlscanslash.l"
{
					if (output_buf->len > 0)
						ECHO;
				}
	YY_BREAK
case 36:
YY_RULE_SETUP
#line 416 "psqlscanslash.l"
{ ECHO; }
	YY_BREAK


/* at end of command, eat a double backslash, but not anything else */
case 37:
YY_RULE_SETUP
#line 423 "psqlscanslash.l"
{
					cur_state->start_state = YY_START;
					return LEXRES_OK;
				}
	YY_BREAK
case 38:
/* rule 38 can match eol */
YY_RULE_SETUP
#line 428 "psqlscanslash.l"
{
					yyless(0);
					cur_state->start_state = YY_START;
					return LEXRES_OK;
				}
	YY_BREAK

case YY_STATE_EOF(INITIAL):
case YY_STATE_EOF(xslashcmd):
case YY_STATE_EOF(xslashargstart):
case YY_STATE_EOF(xslasharg):
case YY_STATE_EOF(xslashquote):
case YY_STATE_EOF(xslashbackquote):
case YY_STATE_EOF(xslashdquote):
case YY_STATE_EOF(xslashwholeline):
case YY_STATE_EOF(xslashend):
#line 436 "psqlscanslash.l"
{
					if (cur_state->buffer_stack == NULL)
					{
						cur_state->start_state = YY_START;
						return LEXRES_EOL;		/* end of input reached */
					}

					/*
					 * We were expanding a variable, so pop the inclusion
					 * stack and keep lexing
					 */
					psqlscan_pop_buffer_stack(cur_state);
					psqlscan_select_top_buffer(cur_state);
				}
	YY_BREAK
case 39:
YY_RULE_SETUP
#line 451 "psqlscanslash.l"
YY_FATAL_ERROR( "flex scanner jammed" );
	YY_BREAK
#line 1677 "psqlscanslash.c"

	case YY_END_OF_BUFFER:
		{
		/* Amount of text matched not including the EOB char. */
		int yy_amount_of_matched_text = (int) (yy_cp - yyg->yytext_ptr) - 1;

		/* Undo the effects of YY_DO_BEFORE_ACTION. */
		*yy_cp = yyg->yy_hold_char;
		YY_RESTORE_YY_MORE_OFFSET

		if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_NEW )
			{
			/* We're scanning a new file or input source.  It's
			 * possible that this happened because the user
			 * just pointed yyin at a new source and called
			 * slash_yylex().  If so, then we have to assure
			 * consistency between YY_CURRENT_BUFFER and our
			 * globals.  Here is the right place to do so, because
			 * this is the first action (other than possibly a
			 * back-up) that will match for the new input source.
			 */
			yyg->yy_n_chars = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
			YY_CURRENT_BUFFER_LVALUE->yy_input_file = yyin;
			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status = YY_BUFFER_NORMAL;
			}

		/* Note that here we test for yy_c_buf_p "<=" to the position
		 * of the first EOB in the buffer, since yy_c_buf_p will
		 * already have been incremented past the NUL character
		 * (since all states make transitions on EOB to the
		 * end-of-buffer state).  Contrast this with the test
		 * in input().
		 */
		if ( yyg->yy_c_buf_p <= &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] )
			{ /* This was really a NUL. */
			yy_state_type yy_next_state;

			yyg->yy_c_buf_p = yyg->yytext_ptr + yy_amount_of_matched_text;

			yy_current_state = yy_get_previous_state( yyscanner );

			/* Okay, we're now positioned to make the NUL
			 * transition.  We couldn't have
			 * yy_get_previous_state() go ahead and do it
			 * for us because it doesn't know how to deal
			 * with the possibility of jamming (and we don't
			 * want to build jamming into it because then it
			 * will run more slowly).
			 */

			yy_next_state = yy_try_NUL_trans( yy_current_state , yyscanner);

			yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;

			if ( yy_next_state )
				{
				/* Consume the NUL. */
				yy_cp = ++yyg->yy_c_buf_p;
				yy_current_state = yy_next_state;
				goto yy_match;
				}

			else
				{
				yy_cp = yyg->yy_c_buf_p;
				goto yy_find_action;
				}
			}

		else switch ( yy_get_next_buffer( yyscanner ) )
			{
			case EOB_ACT_END_OF_FILE:
				{
				yyg->yy_did_buffer_switch_on_eof = 0;

				if ( slash_yywrap(yyscanner ) )
					{
					/* Note: because we've taken care in
					 * yy_get_next_buffer() to have set up
					 * yytext, we can now set up
					 * yy_c_buf_p so that if some total
					 * hoser (like flex itself) wants to
					 * call the scanner after we return the
					 * YY_NULL, it'll still work - another
					 * YY_NULL will get returned.
					 */
					yyg->yy_c_buf_p = yyg->yytext_ptr + YY_MORE_ADJ;

					yy_act = YY_STATE_EOF(YY_START);
					goto do_action;
					}

				else
					{
					if ( ! yyg->yy_did_buffer_switch_on_eof )
						YY_NEW_FILE;
					}
				break;
				}

			case EOB_ACT_CONTINUE_SCAN:
				yyg->yy_c_buf_p =
					yyg->yytext_ptr + yy_amount_of_matched_text;

				yy_current_state = yy_get_previous_state( yyscanner );

				yy_cp = yyg->yy_c_buf_p;
				yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
				goto yy_match;

			case EOB_ACT_LAST_MATCH:
				yyg->yy_c_buf_p =
				&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars];

				yy_current_state = yy_get_previous_state( yyscanner );

				yy_cp = yyg->yy_c_buf_p;
				yy_bp = yyg->yytext_ptr + YY_MORE_ADJ;
				goto yy_find_action;
			}
		break;
		}

	default:
		YY_FATAL_ERROR(
			"fatal flex scanner internal error--no action found" );
	} /* end of action switch */
		} /* end of scanning one token */
	} /* end of user's declarations */
} /* end of slash_yylex */

/* yy_get_next_buffer - try to read in a new buffer
 *
 * Returns a code representing an action:
 *	EOB_ACT_LAST_MATCH -
 *	EOB_ACT_CONTINUE_SCAN - continue scanning from current position
 *	EOB_ACT_END_OF_FILE - end of file
 */
static int yy_get_next_buffer (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
	register char *dest = YY_CURRENT_BUFFER_LVALUE->yy_ch_buf;
	register char *source = yyg->yytext_ptr;
	register int number_to_move, i;
	int ret_val;

	if ( yyg->yy_c_buf_p > &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] )
		YY_FATAL_ERROR(
		"fatal flex scanner internal error--end of buffer missed" );

	if ( YY_CURRENT_BUFFER_LVALUE->yy_fill_buffer == 0 )
		{ /* Don't try to fill the buffer, so this is an EOF. */
		if ( yyg->yy_c_buf_p - yyg->yytext_ptr - YY_MORE_ADJ == 1 )
			{
			/* We matched a single character, the EOB, so
			 * treat this as a final EOF.
			 */
			return EOB_ACT_END_OF_FILE;
			}

		else
			{
			/* We matched some text prior to the EOB, first
			 * process it.
			 */
			return EOB_ACT_LAST_MATCH;
			}
		}

	/* Try to read more data. */

	/* First move last chars to start of buffer. */
	number_to_move = (int) (yyg->yy_c_buf_p - yyg->yytext_ptr) - 1;

	for ( i = 0; i < number_to_move; ++i )
		*(dest++) = *(source++);

	if ( YY_CURRENT_BUFFER_LVALUE->yy_buffer_status == YY_BUFFER_EOF_PENDING )
		/* don't do the read, it's not guaranteed to return an EOF,
		 * just force an EOF
		 */
		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars = 0;

	else
		{
			int num_to_read =
			YY_CURRENT_BUFFER_LVALUE->yy_buf_size - number_to_move - 1;

		while ( num_to_read <= 0 )
			{ /* Not enough room in the buffer - grow it. */

			/* just a shorter name for the current buffer */
			YY_BUFFER_STATE b = YY_CURRENT_BUFFER_LVALUE;

			int yy_c_buf_p_offset =
				(int) (yyg->yy_c_buf_p - b->yy_ch_buf);

			if ( b->yy_is_our_buffer )
				{
				yy_size_t new_size = b->yy_buf_size * 2;

				if ( new_size <= 0 )
					b->yy_buf_size += b->yy_buf_size / 8;
				else
					b->yy_buf_size *= 2;

				b->yy_ch_buf = (char *)
					/* Include room in for 2 EOB chars. */
					slash_yyrealloc((void *) b->yy_ch_buf,b->yy_buf_size + 2 ,yyscanner );
				}
			else
				/* Can't grow it, we don't own it. */
				b->yy_ch_buf = 0;

			if ( ! b->yy_ch_buf )
				YY_FATAL_ERROR(
				"fatal error - scanner input buffer overflow" );

			yyg->yy_c_buf_p = &b->yy_ch_buf[yy_c_buf_p_offset];

			num_to_read = YY_CURRENT_BUFFER_LVALUE->yy_buf_size -
						number_to_move - 1;

			}

		if ( num_to_read > YY_READ_BUF_SIZE )
			num_to_read = YY_READ_BUF_SIZE;

		/* Read in more data. */
		YY_INPUT( (&YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[number_to_move]),
			yyg->yy_n_chars, num_to_read );

		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
		}

	if ( yyg->yy_n_chars == 0 )
		{
		if ( number_to_move == YY_MORE_ADJ )
			{
			ret_val = EOB_ACT_END_OF_FILE;
			slash_yyrestart(yyin  ,yyscanner);
			}

		else
			{
			ret_val = EOB_ACT_LAST_MATCH;
			YY_CURRENT_BUFFER_LVALUE->yy_buffer_status =
				YY_BUFFER_EOF_PENDING;
			}
		}

	else
		ret_val = EOB_ACT_CONTINUE_SCAN;

	if ((yy_size_t) (yyg->yy_n_chars + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {
		/* Extend the array by 50%, plus the number we really need. */
		yy_size_t new_size = yyg->yy_n_chars + number_to_move + (yyg->yy_n_chars >> 1);
		YY_CURRENT_BUFFER_LVALUE->yy_ch_buf = (char *) slash_yyrealloc((void *) YY_CURRENT_BUFFER_LVALUE->yy_ch_buf,new_size ,yyscanner );
		if ( ! YY_CURRENT_BUFFER_LVALUE->yy_ch_buf )
			YY_FATAL_ERROR( "out of dynamic memory in yy_get_next_buffer()" );
	}

	yyg->yy_n_chars += number_to_move;
	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] = YY_END_OF_BUFFER_CHAR;
	YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars + 1] = YY_END_OF_BUFFER_CHAR;

	yyg->yytext_ptr = &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[0];

	return ret_val;
}

/* yy_get_previous_state - get the state just before the EOB char was reached */

    static yy_state_type yy_get_previous_state (yyscan_t yyscanner)
{
	register yy_state_type yy_current_state;
	register char *yy_cp;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	yy_current_state = yyg->yy_start;

	for ( yy_cp = yyg->yytext_ptr + YY_MORE_ADJ; yy_cp < yyg->yy_c_buf_p; ++yy_cp )
		{
		yy_current_state = yy_nxt[yy_current_state][(*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1)];
		}

	return yy_current_state;
}

/* yy_try_NUL_trans - try to make a transition on the NUL character
 *
 * synopsis
 *	next_state = yy_try_NUL_trans( current_state );
 */
    static yy_state_type yy_try_NUL_trans  (yy_state_type yy_current_state , yyscan_t yyscanner)
{
	register int yy_is_jam;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner; /* This var may be unused depending upon options. */

	yy_current_state = yy_nxt[yy_current_state][1];
	yy_is_jam = (yy_current_state <= 0);

	(void)yyg;
	return yy_is_jam ? 0 : yy_current_state;
}

#ifndef YY_NO_INPUT
#ifdef __cplusplus
    static int yyinput (yyscan_t yyscanner)
#else
    static int input  (yyscan_t yyscanner)
#endif

{
	int c;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	*yyg->yy_c_buf_p = yyg->yy_hold_char;

	if ( *yyg->yy_c_buf_p == YY_END_OF_BUFFER_CHAR )
		{
		/* yy_c_buf_p now points to the character we want to return.
		 * If this occurs *before* the EOB characters, then it's a
		 * valid NUL; if not, then we've hit the end of the buffer.
		 */
		if ( yyg->yy_c_buf_p < &YY_CURRENT_BUFFER_LVALUE->yy_ch_buf[yyg->yy_n_chars] )
			/* This was really a NUL. */
			*yyg->yy_c_buf_p = '\0';

		else
			{ /* need more input */
			yy_size_t offset = yyg->yy_c_buf_p - yyg->yytext_ptr;
			++yyg->yy_c_buf_p;

			switch ( yy_get_next_buffer( yyscanner ) )
				{
				case EOB_ACT_LAST_MATCH:
					/* This happens because yy_g_n_b()
					 * sees that we've accumulated a
					 * token and flags that we need to
					 * try matching the token before
					 * proceeding.  But for input(),
					 * there's no matching to consider.
					 * So convert the EOB_ACT_LAST_MATCH
					 * to EOB_ACT_END_OF_FILE.
					 */

					/* Reset buffer status. */
					slash_yyrestart(yyin ,yyscanner);

					/*FALLTHROUGH*/

				case EOB_ACT_END_OF_FILE:
					{
					if ( slash_yywrap(yyscanner ) )
						return EOF;

					if ( ! yyg->yy_did_buffer_switch_on_eof )
						YY_NEW_FILE;
#ifdef __cplusplus
					return yyinput(yyscanner);
#else
					return input(yyscanner);
#endif
					}

				case EOB_ACT_CONTINUE_SCAN:
					yyg->yy_c_buf_p = yyg->yytext_ptr + offset;
					break;
				}
			}
		}

	c = *(unsigned char *) yyg->yy_c_buf_p;	/* cast for 8-bit char's */
	*yyg->yy_c_buf_p = '\0';	/* preserve yytext */
	yyg->yy_hold_char = *++yyg->yy_c_buf_p;

	return c;
}
#endif	/* ifndef YY_NO_INPUT */

/** Immediately switch to a different input stream.
 * @param input_file A readable stream.
 * @param yyscanner The scanner object.
 * @note This function does not reset the start condition to @c INITIAL .
 */
    void slash_yyrestart  (FILE * input_file , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	if ( ! YY_CURRENT_BUFFER ){
        slash_yyensure_buffer_stack (yyscanner);
		YY_CURRENT_BUFFER_LVALUE =
            slash_yy_create_buffer(yyin,YY_BUF_SIZE ,yyscanner);
	}

	slash_yy_init_buffer(YY_CURRENT_BUFFER,input_file ,yyscanner);
	slash_yy_load_buffer_state(yyscanner );
}

/** Switch to a different input buffer.
 * @param new_buffer The new input buffer.
 * @param yyscanner The scanner object.
 */
    void slash_yy_switch_to_buffer  (YY_BUFFER_STATE  new_buffer , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	/* TODO. We should be able to replace this entire function body
	 * with
	 *		slash_yypop_buffer_state();
	 *		slash_yypush_buffer_state(new_buffer);
     */
	slash_yyensure_buffer_stack (yyscanner);
	if ( YY_CURRENT_BUFFER == new_buffer )
		return;

	if ( YY_CURRENT_BUFFER )
		{
		/* Flush out information for old buffer. */
		*yyg->yy_c_buf_p = yyg->yy_hold_char;
		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = yyg->yy_c_buf_p;
		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
		}

	YY_CURRENT_BUFFER_LVALUE = new_buffer;
	slash_yy_load_buffer_state(yyscanner );

	/* We don't actually know whether we did this switch during
	 * EOF (slash_yywrap()) processing, but the only time this flag
	 * is looked at is after slash_yywrap() is called, so it's safe
	 * to go ahead and always set it.
	 */
	yyg->yy_did_buffer_switch_on_eof = 1;
}

static void slash_yy_load_buffer_state  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
	yyg->yy_n_chars = YY_CURRENT_BUFFER_LVALUE->yy_n_chars;
	yyg->yytext_ptr = yyg->yy_c_buf_p = YY_CURRENT_BUFFER_LVALUE->yy_buf_pos;
	yyin = YY_CURRENT_BUFFER_LVALUE->yy_input_file;
	yyg->yy_hold_char = *yyg->yy_c_buf_p;
}

/** Allocate and initialize an input buffer state.
 * @param file A readable stream.
 * @param size The character buffer size in bytes. When in doubt, use @c YY_BUF_SIZE.
 * @param yyscanner The scanner object.
 * @return the allocated buffer state.
 */
    YY_BUFFER_STATE slash_yy_create_buffer  (FILE * file, int  size , yyscan_t yyscanner)
{
	YY_BUFFER_STATE b;
    
	b = (YY_BUFFER_STATE) slash_yyalloc(sizeof( struct yy_buffer_state ) ,yyscanner );
	if ( ! b )
		YY_FATAL_ERROR( "out of dynamic memory in slash_yy_create_buffer()" );

	b->yy_buf_size = size;

	/* yy_ch_buf has to be 2 characters longer than the size given because
	 * we need to put in 2 end-of-buffer characters.
	 */
	b->yy_ch_buf = (char *) slash_yyalloc(b->yy_buf_size + 2 ,yyscanner );
	if ( ! b->yy_ch_buf )
		YY_FATAL_ERROR( "out of dynamic memory in slash_yy_create_buffer()" );

	b->yy_is_our_buffer = 1;

	slash_yy_init_buffer(b,file ,yyscanner);

	return b;
}

/** Destroy the buffer.
 * @param b a buffer created with slash_yy_create_buffer()
 * @param yyscanner The scanner object.
 */
    void slash_yy_delete_buffer (YY_BUFFER_STATE  b , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	if ( ! b )
		return;

	if ( b == YY_CURRENT_BUFFER ) /* Not sure if we should pop here. */
		YY_CURRENT_BUFFER_LVALUE = (YY_BUFFER_STATE) 0;

	if ( b->yy_is_our_buffer )
		slash_yyfree((void *) b->yy_ch_buf ,yyscanner );

	slash_yyfree((void *) b ,yyscanner );
}

/* Initializes or reinitializes a buffer.
 * This function is sometimes called more than once on the same buffer,
 * such as during a slash_yyrestart() or at EOF.
 */
    static void slash_yy_init_buffer  (YY_BUFFER_STATE  b, FILE * file , yyscan_t yyscanner)

{
	int oerrno = errno;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	slash_yy_flush_buffer(b ,yyscanner);

	b->yy_input_file = file;
	b->yy_fill_buffer = 1;

    /* If b is the current buffer, then slash_yy_init_buffer was _probably_
     * called from slash_yyrestart() or through yy_get_next_buffer.
     * In that case, we don't want to reset the lineno or column.
     */
    if (b != YY_CURRENT_BUFFER){
        b->yy_bs_lineno = 1;
        b->yy_bs_column = 0;
    }

        b->yy_is_interactive = 0;
    
	errno = oerrno;
}

/** Discard all buffered characters. On the next scan, YY_INPUT will be called.
 * @param b the buffer state to be flushed, usually @c YY_CURRENT_BUFFER.
 * @param yyscanner The scanner object.
 */
    void slash_yy_flush_buffer (YY_BUFFER_STATE  b , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
	if ( ! b )
		return;

	b->yy_n_chars = 0;

	/* We always need two end-of-buffer characters.  The first causes
	 * a transition to the end-of-buffer state.  The second causes
	 * a jam in that state.
	 */
	b->yy_ch_buf[0] = YY_END_OF_BUFFER_CHAR;
	b->yy_ch_buf[1] = YY_END_OF_BUFFER_CHAR;

	b->yy_buf_pos = &b->yy_ch_buf[0];

	b->yy_at_bol = 1;
	b->yy_buffer_status = YY_BUFFER_NEW;

	if ( b == YY_CURRENT_BUFFER )
		slash_yy_load_buffer_state(yyscanner );
}

/** Pushes the new state onto the stack. The new state becomes
 *  the current state. This function will allocate the stack
 *  if necessary.
 *  @param new_buffer The new state.
 *  @param yyscanner The scanner object.
 */
void slash_yypush_buffer_state (YY_BUFFER_STATE new_buffer , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
	if (new_buffer == NULL)
		return;

	slash_yyensure_buffer_stack(yyscanner);

	/* This block is copied from slash_yy_switch_to_buffer. */
	if ( YY_CURRENT_BUFFER )
		{
		/* Flush out information for old buffer. */
		*yyg->yy_c_buf_p = yyg->yy_hold_char;
		YY_CURRENT_BUFFER_LVALUE->yy_buf_pos = yyg->yy_c_buf_p;
		YY_CURRENT_BUFFER_LVALUE->yy_n_chars = yyg->yy_n_chars;
		}

	/* Only push if top exists. Otherwise, replace top. */
	if (YY_CURRENT_BUFFER)
		yyg->yy_buffer_stack_top++;
	YY_CURRENT_BUFFER_LVALUE = new_buffer;

	/* copied from slash_yy_switch_to_buffer. */
	slash_yy_load_buffer_state(yyscanner );
	yyg->yy_did_buffer_switch_on_eof = 1;
}

/** Removes and deletes the top of the stack, if present.
 *  The next element becomes the new top.
 *  @param yyscanner The scanner object.
 */
void slash_yypop_buffer_state (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
	if (!YY_CURRENT_BUFFER)
		return;

	slash_yy_delete_buffer(YY_CURRENT_BUFFER ,yyscanner);
	YY_CURRENT_BUFFER_LVALUE = NULL;
	if (yyg->yy_buffer_stack_top > 0)
		--yyg->yy_buffer_stack_top;

	if (YY_CURRENT_BUFFER) {
		slash_yy_load_buffer_state(yyscanner );
		yyg->yy_did_buffer_switch_on_eof = 1;
	}
}

/* Allocates the stack if it does not exist.
 *  Guarantees space for at least one push.
 */
static void slash_yyensure_buffer_stack (yyscan_t yyscanner)
{
	yy_size_t num_to_alloc;
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

	if (!yyg->yy_buffer_stack) {

		/* First allocation is just for 2 elements, since we don't know if this
		 * scanner will even need a stack. We use 2 instead of 1 to avoid an
		 * immediate realloc on the next call.
         */
		num_to_alloc = 1;
		yyg->yy_buffer_stack = (struct yy_buffer_state**)slash_yyalloc
								(num_to_alloc * sizeof(struct yy_buffer_state*)
								, yyscanner);
		if ( ! yyg->yy_buffer_stack )
			YY_FATAL_ERROR( "out of dynamic memory in slash_yyensure_buffer_stack()" );
								  
		memset(yyg->yy_buffer_stack, 0, num_to_alloc * sizeof(struct yy_buffer_state*));
				
		yyg->yy_buffer_stack_max = num_to_alloc;
		yyg->yy_buffer_stack_top = 0;
		return;
	}

	if (yyg->yy_buffer_stack_top >= (yyg->yy_buffer_stack_max) - 1){

		/* Increase the buffer to prepare for a possible push. */
		int grow_size = 8 /* arbitrary grow size */;

		num_to_alloc = yyg->yy_buffer_stack_max + grow_size;
		yyg->yy_buffer_stack = (struct yy_buffer_state**)slash_yyrealloc
								(yyg->yy_buffer_stack,
								num_to_alloc * sizeof(struct yy_buffer_state*)
								, yyscanner);
		if ( ! yyg->yy_buffer_stack )
			YY_FATAL_ERROR( "out of dynamic memory in slash_yyensure_buffer_stack()" );

		/* zero only the new slots.*/
		memset(yyg->yy_buffer_stack + yyg->yy_buffer_stack_max, 0, grow_size * sizeof(struct yy_buffer_state*));
		yyg->yy_buffer_stack_max = num_to_alloc;
	}
}

/** Setup the input buffer state to scan directly from a user-specified character buffer.
 * @param base the character buffer
 * @param size the size in bytes of the character buffer
 * @param yyscanner The scanner object.
 * @return the newly allocated buffer state object. 
 */
YY_BUFFER_STATE slash_yy_scan_buffer  (char * base, yy_size_t  size , yyscan_t yyscanner)
{
	YY_BUFFER_STATE b;
    
	if ( size < 2 ||
	     base[size-2] != YY_END_OF_BUFFER_CHAR ||
	     base[size-1] != YY_END_OF_BUFFER_CHAR )
		/* They forgot to leave room for the EOB's. */
		return 0;

	b = (YY_BUFFER_STATE) slash_yyalloc(sizeof( struct yy_buffer_state ) ,yyscanner );
	if ( ! b )
		YY_FATAL_ERROR( "out of dynamic memory in slash_yy_scan_buffer()" );

	b->yy_buf_size = size - 2;	/* "- 2" to take care of EOB's */
	b->yy_buf_pos = b->yy_ch_buf = base;
	b->yy_is_our_buffer = 0;
	b->yy_input_file = 0;
	b->yy_n_chars = b->yy_buf_size;
	b->yy_is_interactive = 0;
	b->yy_at_bol = 1;
	b->yy_fill_buffer = 0;
	b->yy_buffer_status = YY_BUFFER_NEW;

	slash_yy_switch_to_buffer(b ,yyscanner );

	return b;
}

/** Setup the input buffer state to scan a string. The next call to slash_yylex() will
 * scan from a @e copy of @a str.
 * @param yystr a NUL-terminated string to scan
 * @param yyscanner The scanner object.
 * @return the newly allocated buffer state object.
 * @note If you want to scan bytes that may contain NUL values, then use
 *       slash_yy_scan_bytes() instead.
 */
YY_BUFFER_STATE slash_yy_scan_string (yyconst char * yystr , yyscan_t yyscanner)
{
    
	return slash_yy_scan_bytes(yystr,strlen(yystr) ,yyscanner);
}

/** Setup the input buffer state to scan the given bytes. The next call to slash_yylex() will
 * scan from a @e copy of @a bytes.
 * @param yybytes the byte buffer to scan
 * @param _yybytes_len the number of bytes in the buffer pointed to by @a bytes.
 * @param yyscanner The scanner object.
 * @return the newly allocated buffer state object.
 */
YY_BUFFER_STATE slash_yy_scan_bytes  (yyconst char * yybytes, yy_size_t  _yybytes_len , yyscan_t yyscanner)
{
	YY_BUFFER_STATE b;
	char *buf;
	yy_size_t n;
	yy_size_t i;
    
	/* Get memory for full buffer, including space for trailing EOB's. */
	n = _yybytes_len + 2;
	buf = (char *) slash_yyalloc(n ,yyscanner );
	if ( ! buf )
		YY_FATAL_ERROR( "out of dynamic memory in slash_yy_scan_bytes()" );

	for ( i = 0; i < _yybytes_len; ++i )
		buf[i] = yybytes[i];

	buf[_yybytes_len] = buf[_yybytes_len+1] = YY_END_OF_BUFFER_CHAR;

	b = slash_yy_scan_buffer(buf,n ,yyscanner);
	if ( ! b )
		YY_FATAL_ERROR( "bad buffer in slash_yy_scan_bytes()" );

	/* It's okay to grow etc. this buffer, and we should throw it
	 * away when we're done.
	 */
	b->yy_is_our_buffer = 1;

	return b;
}

#ifndef YY_EXIT_FAILURE
#define YY_EXIT_FAILURE 2
#endif

static void yy_fatal_error (yyconst char* msg , yyscan_t yyscanner)
{
    	(void) fprintf( stderr, "%s\n", msg );
	exit( YY_EXIT_FAILURE );
}

/* Redefine yyless() so it works in section 3 code. */

#undef yyless
#define yyless(n) \
	do \
		{ \
		/* Undo effects of setting up yytext. */ \
        int yyless_macro_arg = (n); \
        YY_LESS_LINENO(yyless_macro_arg);\
		yytext[yyleng] = yyg->yy_hold_char; \
		yyg->yy_c_buf_p = yytext + yyless_macro_arg; \
		yyg->yy_hold_char = *yyg->yy_c_buf_p; \
		*yyg->yy_c_buf_p = '\0'; \
		yyleng = yyless_macro_arg; \
		} \
	while ( 0 )

/* Accessor  methods (get/set functions) to struct members. */

/** Get the user-defined data for this scanner.
 * @param yyscanner The scanner object.
 */
YY_EXTRA_TYPE slash_yyget_extra  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yyextra;
}

/** Get the current line number.
 * @param yyscanner The scanner object.
 */
int slash_yyget_lineno  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    
        if (! YY_CURRENT_BUFFER)
            return 0;
    
    return yylineno;
}

/** Get the current column number.
 * @param yyscanner The scanner object.
 */
int slash_yyget_column  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    
        if (! YY_CURRENT_BUFFER)
            return 0;
    
    return yycolumn;
}

/** Get the input stream.
 * @param yyscanner The scanner object.
 */
FILE *slash_yyget_in  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yyin;
}

/** Get the output stream.
 * @param yyscanner The scanner object.
 */
FILE *slash_yyget_out  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yyout;
}

/** Get the length of the current token.
 * @param yyscanner The scanner object.
 */
yy_size_t slash_yyget_leng  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yyleng;
}

/** Get the current token.
 * @param yyscanner The scanner object.
 */

char *slash_yyget_text  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yytext;
}

/** Set the user-defined data. This data is never touched by the scanner.
 * @param user_defined The data to be associated with this scanner.
 * @param yyscanner The scanner object.
 */
void slash_yyset_extra (YY_EXTRA_TYPE  user_defined , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yyextra = user_defined ;
}

/** Set the current line number.
 * @param line_number
 * @param yyscanner The scanner object.
 */
void slash_yyset_lineno (int  line_number , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

        /* lineno is only valid if an input buffer exists. */
        if (! YY_CURRENT_BUFFER )
           YY_FATAL_ERROR( "slash_yyset_lineno called with no buffer" );
    
    yylineno = line_number;
}

/** Set the current column.
 * @param line_number
 * @param yyscanner The scanner object.
 */
void slash_yyset_column (int  column_no , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

        /* column is only valid if an input buffer exists. */
        if (! YY_CURRENT_BUFFER )
           YY_FATAL_ERROR( "slash_yyset_column called with no buffer" );
    
    yycolumn = column_no;
}

/** Set the input stream. This does not discard the current
 * input buffer.
 * @param in_str A readable stream.
 * @param yyscanner The scanner object.
 * @see slash_yy_switch_to_buffer
 */
void slash_yyset_in (FILE *  in_str , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yyin = in_str ;
}

void slash_yyset_out (FILE *  out_str , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yyout = out_str ;
}

int slash_yyget_debug  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yy_flex_debug;
}

void slash_yyset_debug (int  bdebug , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yy_flex_debug = bdebug ;
}

/* Accessor methods for yylval and yylloc */

YYSTYPE * slash_yyget_lval  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    return yylval;
}

void slash_yyset_lval (YYSTYPE *  yylval_param , yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    yylval = yylval_param;
}

/* User-visible API */

/* slash_yylex_init is special because it creates the scanner itself, so it is
 * the ONLY reentrant function that doesn't take the scanner as the last argument.
 * That's why we explicitly handle the declaration, instead of using our macros.
 */

int slash_yylex_init(yyscan_t* ptr_yy_globals)

{
    if (ptr_yy_globals == NULL){
        errno = EINVAL;
        return 1;
    }

    *ptr_yy_globals = (yyscan_t) slash_yyalloc ( sizeof( struct yyguts_t ), NULL );

    if (*ptr_yy_globals == NULL){
        errno = ENOMEM;
        return 1;
    }

    /* By setting to 0xAA, we expose bugs in yy_init_globals. Leave at 0x00 for releases. */
    memset(*ptr_yy_globals,0x00,sizeof(struct yyguts_t));

    return yy_init_globals ( *ptr_yy_globals );
}

/* slash_yylex_init_extra has the same functionality as slash_yylex_init, but follows the
 * convention of taking the scanner as the last argument. Note however, that
 * this is a *pointer* to a scanner, as it will be allocated by this call (and
 * is the reason, too, why this function also must handle its own declaration).
 * The user defined value in the first argument will be available to slash_yyalloc in
 * the yyextra field.
 */

int slash_yylex_init_extra(YY_EXTRA_TYPE yy_user_defined,yyscan_t* ptr_yy_globals )

{
    struct yyguts_t dummy_yyguts;

    slash_yyset_extra (yy_user_defined, &dummy_yyguts);

    if (ptr_yy_globals == NULL){
        errno = EINVAL;
        return 1;
    }
	
    *ptr_yy_globals = (yyscan_t) slash_yyalloc ( sizeof( struct yyguts_t ), &dummy_yyguts );
	
    if (*ptr_yy_globals == NULL){
        errno = ENOMEM;
        return 1;
    }
    
    /* By setting to 0xAA, we expose bugs in
    yy_init_globals. Leave at 0x00 for releases. */
    memset(*ptr_yy_globals,0x00,sizeof(struct yyguts_t));
    
    slash_yyset_extra (yy_user_defined, *ptr_yy_globals);
    
    return yy_init_globals ( *ptr_yy_globals );
}

static int yy_init_globals (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;
    /* Initialization is the same as for the non-reentrant scanner.
     * This function is called from slash_yylex_destroy(), so don't allocate here.
     */

    yyg->yy_buffer_stack = 0;
    yyg->yy_buffer_stack_top = 0;
    yyg->yy_buffer_stack_max = 0;
    yyg->yy_c_buf_p = (char *) 0;
    yyg->yy_init = 0;
    yyg->yy_start = 0;

    yyg->yy_start_stack_ptr = 0;
    yyg->yy_start_stack_depth = 0;
    yyg->yy_start_stack =  NULL;

/* Defined in main.c */
#ifdef YY_STDINIT
    yyin = stdin;
    yyout = stdout;
#else
    yyin = (FILE *) 0;
    yyout = (FILE *) 0;
#endif

    /* For future reference: Set errno on error, since we are called by
     * slash_yylex_init()
     */
    return 0;
}

/* slash_yylex_destroy is for both reentrant and non-reentrant scanners. */
int slash_yylex_destroy  (yyscan_t yyscanner)
{
    struct yyguts_t * yyg = (struct yyguts_t*)yyscanner;

    /* Pop the buffer stack, destroying each element. */
	while(YY_CURRENT_BUFFER){
		slash_yy_delete_buffer(YY_CURRENT_BUFFER ,yyscanner );
		YY_CURRENT_BUFFER_LVALUE = NULL;
		slash_yypop_buffer_state(yyscanner);
	}

	/* Destroy the stack itself. */
	slash_yyfree(yyg->yy_buffer_stack ,yyscanner);
	yyg->yy_buffer_stack = NULL;

    /* Destroy the start condition stack. */
        slash_yyfree(yyg->yy_start_stack ,yyscanner );
        yyg->yy_start_stack = NULL;

    /* Reset the globals. This is important in a non-reentrant scanner so the next time
     * slash_yylex() is called, initialization will occur. */
    yy_init_globals( yyscanner);

    /* Destroy the main struct (reentrant only). */
    slash_yyfree ( yyscanner , yyscanner );
    yyscanner = NULL;
    return 0;
}

/*
 * Internal utility routines.
 */

#ifndef yytext_ptr
static void yy_flex_strncpy (char* s1, yyconst char * s2, int n , yyscan_t yyscanner)
{
	register int i;
	for ( i = 0; i < n; ++i )
		s1[i] = s2[i];
}
#endif

#ifdef YY_NEED_STRLEN
static int yy_flex_strlen (yyconst char * s , yyscan_t yyscanner)
{
	register int n;
	for ( n = 0; s[n]; ++n )
		;

	return n;
}
#endif

void *slash_yyalloc (yy_size_t  size , yyscan_t yyscanner)
{
	return (void *) malloc( size );
}

void *slash_yyrealloc  (void * ptr, yy_size_t  size , yyscan_t yyscanner)
{
	/* The cast to (char *) in the following accommodates both
	 * implementations that use char* generic pointers, and those
	 * that use void* generic pointers.  It works with the latter
	 * because both ANSI C and C++ allow castless assignment from
	 * any pointer type to void*, and deal with argument conversions
	 * as though doing an assignment.
	 */
	return (void *) realloc( (char *) ptr, size );
}

void slash_yyfree (void * ptr , yyscan_t yyscanner)
{
	free( (char *) ptr );	/* see slash_yyrealloc() for (char *) cast */
}

#define YYTABLES_NAME "yytables"

#line 450 "psqlscanslash.l"



/*
 * Scan the command name of a psql backslash command.  This should be called
 * after psql_scan() returns PSCAN_BACKSLASH.  It is assumed that the input
 * has been consumed through the leading backslash.
 *
 * The return value is a malloc'd copy of the command name, as parsed off
 * from the input.
 */
char *
psql_scan_slash_command(PsqlScanState state)
{
	PQExpBufferData mybuf;

	/* Must be scanning already */
	Assert(state->scanbufhandle != NULL);

	/* Build a local buffer that we'll return the data of */
	initPQExpBuffer(&mybuf);

	/* Set current output target */
	state->output_buf = &mybuf;

	/* Set input source */
	if (state->buffer_stack != NULL)
		slash_yy_switch_to_buffer(state->buffer_stack->buf,state->scanner);
	else
		slash_yy_switch_to_buffer(state->scanbufhandle,state->scanner);

	/*
	 * Set lexer start state.  Note that this is sufficient to switch
	 * state->scanner over to using the tables in this lexer file.
	 */
	state->start_state = xslashcmd;

	/* And lex. */
	slash_yylex(NULL,state->scanner);

	/* There are no possible errors in this lex state... */

	/*
	 * In case the caller returns to using the regular SQL lexer, reselect the
	 * appropriate initial state.
	 */
	psql_scan_reselect_sql_lexer(state);

	return mybuf.data;
}

/*
 * Parse off the next argument for a backslash command, and return it as a
 * malloc'd string.  If there are no more arguments, returns NULL.
 *
 * type tells what processing, if any, to perform on the option string;
 * for example, if it's a SQL identifier, we want to downcase any unquoted
 * letters.
 *
 * if quote is not NULL, *quote is set to 0 if no quoting was found, else
 * the last quote symbol used in the argument.
 *
 * if semicolon is true, unquoted trailing semicolon(s) that would otherwise
 * be taken as part of the option string will be stripped.
 *
 * NOTE: the only possible syntax errors for backslash options are unmatched
 * quotes, which are detected when we run out of input.  Therefore, on a
 * syntax error we just throw away the string and return NULL; there is no
 * need to worry about flushing remaining input.
 */
char *
psql_scan_slash_option(PsqlScanState state,
					   enum slash_option_type type,
					   char *quote,
					   bool semicolon)
{
	PQExpBufferData mybuf;
	int			lexresult PG_USED_FOR_ASSERTS_ONLY;
	int			final_state;
	char		local_quote;

	/* Must be scanning already */
	Assert(state->scanbufhandle != NULL);

	if (quote == NULL)
		quote = &local_quote;
	*quote = 0;

	/* Build a local buffer that we'll return the data of */
	initPQExpBuffer(&mybuf);

	/* Set up static variables that will be used by slash_yylex */
	option_type = type;
	option_quote = quote;
	unquoted_option_chars = 0;

	/* Set current output target */
	state->output_buf = &mybuf;

	/* Set input source */
	if (state->buffer_stack != NULL)
		slash_yy_switch_to_buffer(state->buffer_stack->buf,state->scanner);
	else
		slash_yy_switch_to_buffer(state->scanbufhandle,state->scanner);

	/* Set lexer start state */
	if (type == OT_WHOLE_LINE)
		state->start_state = xslashwholeline;
	else
		state->start_state = xslashargstart;

	/* And lex. */
	lexresult = slash_yylex(NULL,state->scanner);

	/* Save final state for a moment... */
	final_state = state->start_state;

	/*
	 * In case the caller returns to using the regular SQL lexer, reselect the
	 * appropriate initial state.
	 */
	psql_scan_reselect_sql_lexer(state);

	/*
	 * Check the lex result: we should have gotten back either LEXRES_OK
	 * or LEXRES_EOL (the latter indicating end of string).  If we were inside
	 * a quoted string, as indicated by final_state, EOL is an error.
	 */
	Assert(lexresult == LEXRES_EOL || lexresult == LEXRES_OK);

	switch (final_state)
	{
		case xslashargstart:
			/* empty arg */
			break;
		case xslasharg:
			/* Strip any unquoted trailing semi-colons if requested */
			if (semicolon)
			{
				while (unquoted_option_chars-- > 0 &&
					   mybuf.len > 0 &&
					   mybuf.data[mybuf.len - 1] == ';')
				{
					mybuf.data[--mybuf.len] = '\0';
				}
			}

			/*
			 * If SQL identifier processing was requested, then we strip out
			 * excess double quotes and optionally downcase unquoted letters.
			 */
			if (type == OT_SQLID || type == OT_SQLIDHACK)
			{
				dequote_downcase_identifier(mybuf.data,
											(type != OT_SQLIDHACK),
											state->encoding);
				/* update mybuf.len for possible shortening */
				mybuf.len = strlen(mybuf.data);
			}
			break;
		case xslashquote:
		case xslashbackquote:
		case xslashdquote:
			/* must have hit EOL inside quotes */
			state->callbacks->write_error("unterminated quoted string\n");
			termPQExpBuffer(&mybuf);
			return NULL;
		case xslashwholeline:
			/* always okay */
			break;
		default:
			/* can't get here */
			fprintf(stderr, "invalid YY_START\n");
			exit(1);
	}

	/*
	 * An unquoted empty argument isn't possible unless we are at end of
	 * command.  Return NULL instead.
	 */
	if (mybuf.len == 0 && *quote == 0)
	{
		termPQExpBuffer(&mybuf);
		return NULL;
	}

	/* Else return the completed string. */
	return mybuf.data;
}

/*
 * Eat up any unused \\ to complete a backslash command.
 */
void
psql_scan_slash_command_end(PsqlScanState state)
{
	/* Must be scanning already */
	Assert(state->scanbufhandle != NULL);

	/* Set current output target */
	state->output_buf = NULL;	/* we won't output anything */

	/* Set input source */
	if (state->buffer_stack != NULL)
		slash_yy_switch_to_buffer(state->buffer_stack->buf,state->scanner);
	else
		slash_yy_switch_to_buffer(state->scanbufhandle,state->scanner);

	/* Set lexer start state */
	state->start_state = xslashend;

	/* And lex. */
	slash_yylex(NULL,state->scanner);

	/* There are no possible errors in this lex state... */

	/*
	 * We expect the caller to return to using the regular SQL lexer, so
	 * reselect the appropriate initial state.
	 */
	psql_scan_reselect_sql_lexer(state);
}

/*
 * Fetch current paren nesting depth
 */
int
psql_scan_get_paren_depth(PsqlScanState state)
{
	return state->paren_depth;
}

/*
 * Set paren nesting depth
 */
void
psql_scan_set_paren_depth(PsqlScanState state, int depth)
{
	Assert(depth >= 0);
	state->paren_depth = depth;
}

/*
 * De-quote and optionally downcase a SQL identifier.
 *
 * The string at *str is modified in-place; it can become shorter,
 * but not longer.
 *
 * If downcase is true then non-quoted letters are folded to lower case.
 * Ideally this behavior will match the backend's downcase_identifier();
 * but note that it could differ if LC_CTYPE is different in the frontend.
 *
 * Note that a string like FOO"BAR"BAZ will be converted to fooBARbaz;
 * this is somewhat inconsistent with the SQL spec, which would have us
 * parse it as several identifiers.  But for psql's purposes, we want a
 * string like "foo"."bar" to be treated as one option, so there's little
 * choice; this routine doesn't get to change the token boundaries.
 */
void
dequote_downcase_identifier(char *str, bool downcase, int encoding)
{
	bool		inquotes = false;
	char	   *cp = str;

	while (*cp)
	{
		if (*cp == '"')
		{
			if (inquotes && cp[1] == '"')
			{
				/* Keep the first quote, remove the second */
				cp++;
			}
			else
				inquotes = !inquotes;
			/* Collapse out quote at *cp */
			memmove(cp, cp + 1, strlen(cp));
			/* do not advance cp */
		}
		else
		{
			if (downcase && !inquotes)
				*cp = pg_tolower((unsigned char) *cp);
			cp += PQmblen(cp, encoding);
		}
	}
}

/*
 * Evaluate a backticked substring of a slash command's argument.
 *
 * The portion of output_buf starting at backtick_start_offset is evaluated
 * as a shell command and then replaced by the command's output.
 */
static void
evaluate_backtick(PsqlScanState state)
{
	PQExpBuffer output_buf = state->output_buf;
	char	   *cmd = output_buf->data + backtick_start_offset;
	PQExpBufferData cmd_output;
	FILE	   *fd;
	bool		error = false;
	char		buf[512];
	size_t		result;

	initPQExpBuffer(&cmd_output);

	fd = popen(cmd, PG_BINARY_R);
	if (!fd)
	{
		state->callbacks->write_error("%s: %s\n", cmd, strerror(errno));
		error = true;
	}

	if (!error)
	{
		do
		{
			result = fread(buf, 1, sizeof(buf), fd);
			if (ferror(fd))
			{
				state->callbacks->write_error("%s: %s\n", cmd, strerror(errno));
				error = true;
				break;
			}
			appendBinaryPQExpBuffer(&cmd_output, buf, result);
		} while (!feof(fd));
	}

	if (fd && pclose(fd) == -1)
	{
		state->callbacks->write_error("%s: %s\n", cmd, strerror(errno));
		error = true;
	}

	if (PQExpBufferDataBroken(cmd_output))
	{
		state->callbacks->write_error("%s: out of memory\n", cmd);
		error = true;
	}

	/* Now done with cmd, delete it from output_buf */
	output_buf->len = backtick_start_offset;
	output_buf->data[output_buf->len] = '\0';

	/* If no error, transfer result to output_buf */
	if (!error)
	{
		/* strip any trailing newline */
		if (cmd_output.len > 0 &&
			cmd_output.data[cmd_output.len - 1] == '\n')
			cmd_output.len--;
		appendBinaryPQExpBuffer(output_buf, cmd_output.data, cmd_output.len);
	}

	termPQExpBuffer(&cmd_output);
}

