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/*
* psql - the PostgreSQL interactive terminal
*
* Copyright (c) 2000-2016, PostgreSQL Global Development Group
*
* src/bin/psql/psqlscan.h
*/
#ifndef PSQLSCAN_H
#define PSQLSCAN_H
#include "pqexpbuffer.h"
#include "prompt.h"
/* Abstract type for lexer's internal state */
typedef struct PsqlScanStateData *PsqlScanState;
/* Termination states for psql_scan() */
typedef enum
{
PSCAN_SEMICOLON, /* found command-ending semicolon */
PSCAN_BACKSLASH, /* found backslash command */
PSCAN_INCOMPLETE, /* end of line, SQL statement incomplete */
PSCAN_EOL /* end of line, SQL possibly complete */
} PsqlScanResult;
/* Callback functions to be used by the lexer */
typedef struct PsqlScanCallbacks
{
/* Fetch value of a variable, as a pfree'able string; NULL if unknown */
/* This pointer can be NULL if no variable substitution is wanted */
char *(*get_variable) (const char *varname, bool escape, bool as_ident);
/* Print an error message someplace appropriate */
/* (very old gcc versions don't support attributes on function pointers) */
#if defined(__GNUC__) && __GNUC__ < 4
void (*write_error) (const char *fmt,...);
#else
void (*write_error) (const char *fmt,...) pg_attribute_printf(1, 2);
#endif
} PsqlScanCallbacks;
extern PsqlScanState psql_scan_create(const PsqlScanCallbacks *callbacks);
extern void psql_scan_destroy(PsqlScanState state);
extern void psql_scan_setup(PsqlScanState state,
const char *line, int line_len,
int encoding, bool std_strings);
extern void psql_scan_finish(PsqlScanState state);
extern PsqlScanResult psql_scan(PsqlScanState state,
PQExpBuffer query_buf,
promptStatus_t *prompt);
extern void psql_scan_reset(PsqlScanState state);
extern void psql_scan_reselect_sql_lexer(PsqlScanState state);
extern bool psql_scan_in_quote(PsqlScanState state);
#endif /* PSQLSCAN_H */
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