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Change addlit() to not assume its input is null-terminated, so that we

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don't have more bugs like the quote-quote-quote-quote one.  Propagate
fix into ecpg lexer, too.
This commit is contained in:
Tom Lane
2001-09-07 23:17:14 +00:00
parent b6385efb79
commit 09e99a1082
2 changed files with 13 additions and 11 deletions
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11
src/interfaces/ecpg/preproc/pgc.l
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@@ -12,7 +12,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.79 2001/06/13 12:38:58 meskes Exp $
* $Header: /cvsroot/pgsql/src/interfaces/ecpg/preproc/pgc.l,v 1.80 2001/09/07 23:17:14 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -35,6 +35,8 @@
extern YYSTYPE yylval;
static int xcdepth = 0; /* depth of nesting in slash-star comments */
/*
* literalbuf is used to accumulate literal values when multiple rules
* are needed to parse a single literal. Call startlit to reset buffer
@@ -45,8 +47,6 @@ static char *literalbuf = NULL; /* expandable buffer */
static int literallen; /* actual current length */
static int literalalloc; /* current allocated buffer size */
static int xcdepth = 0;
#define startlit() (literalbuf[0] = '\0', literallen = 0)
static void addlit(char *ytext, int yleng);
@@ -923,9 +923,10 @@ addlit(char *ytext, int yleng)
} while ((literallen+yleng) >= literalalloc);
literalbuf = (char *) realloc(literalbuf, literalalloc);
}
/* append data --- note we assume ytext is null-terminated */
memcpy(literalbuf+literallen, ytext, yleng+1);
/* append new data, add trailing null */
memcpy(literalbuf+literallen, ytext, yleng);
literallen += yleng;
literalbuf[literallen] = '\0';
}
int yywrap(void)