/*------------------------------------------------------------------------- * * scansup.c *	  support routines for the lex/flex scanner, used by both the normal * backend as well as the bootstrap backend * * Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION *	  $Header: /usr/local/cvsroot/pgsql/src/backend/parser/scansup.c,v 1.13 1999/05/25 16:10:25 momjian Exp $ * *------------------------------------------------------------------------- */#include "config.h"#include <ctype.h>#include <string.h>#include "postgres.h"#include "miscadmin.h"#include "parser/scansup.h"#include "utils/elog.h"/* ---------------- *		scanstr * * if the string passed in has escaped codes, map the escape codes to actual * chars * * the string returned is a pointer to static storage and should NOT * be freed by the caller. * ---------------- */char *scanstr(char *s){	static char newStr[MAX_PARSE_BUFFER];	int			len,				i,				j;	if (s == NULL || s[0] == '\0')		return s;	len = strlen(s);	for (i = 0, j = 0; i < len; i++)	{		if (s[i] == '\'')		{			/*			 * Note: if scanner is working right, unescaped quotes can			 * only appear in pairs, so there should be another character.			 */			i++;			newStr[j] = s[i];		}		else if (s[i] == '\\')		{			i++;			switch (s[i])			{				case 'b':					newStr[j] = '\b';					break;				case 'f':					newStr[j] = '\f';					break;				case 'n':					newStr[j] = '\n';					break;				case 'r':					newStr[j] = '\r';					break;				case 't':					newStr[j] = '\t';					break;				case '0':				case '1':				case '2':				case '3':				case '4':				case '5':				case '6':				case '7':					{						int			k;						long		octVal = 0;						for (k = 0;							 s[i + k] >= '0' && s[i + k] <= '7' && k < 3;							 k++)							octVal = (octVal << 3) + (s[i + k] - '0');						i += k - 1;						newStr[j] = ((char) octVal);					}					break;				default:					newStr[j] = s[i];					break;			}					/* switch */		}						/* s[i] == '\\' */		else			newStr[j] = s[i];		j++;	}	newStr[j] = '\0';	return newStr;}