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wrc: Check for overflows when parsing integer constants.

This commit is contained in:
Rob Shearman 2008-10-18 11:51:02 +01:00 committed by Alexandre Julliard
parent cb3ea6843c
commit d1c1543893
1 changed files with 17 additions and 3 deletions
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20
tools/wrc/parser.l
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@ -103,6 +103,7 @@ cident [a-zA-Z_][0-9a-zA-Z_]*
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <limits.h>
#ifndef HAVE_UNISTD_H
#define YY_NO_UNISTD_H
@ -295,6 +296,19 @@ static struct keyword *iskeyword(char *kw)
return kwp;
}
/* converts an integer in string form to an unsigned long and prints an error
* on overflow */
static unsigned long xstrtoul(const char *nptr, char **endptr, int base)
{
unsigned long l;
errno = 0;
l = strtoul(nptr, endptr, base);
if (l == ULONG_MAX && errno == ERANGE)
parser_error("integer constant %s is too large\n", nptr);
return l;
}
%}
/*
@ -378,9 +392,9 @@ static struct keyword *iskeyword(char *kw)
\{ return tBEGIN;
\} return tEND;
[0-9]+[lL]? { parser_lval.num = strtoul(yytext, 0, 10); return toupper(yytext[yyleng-1]) == 'L' ? tLNUMBER : tNUMBER; }
0[xX][0-9A-Fa-f]+[lL]? { parser_lval.num = strtoul(yytext, 0, 16); return toupper(yytext[yyleng-1]) == 'L' ? tLNUMBER : tNUMBER; }
0[oO][0-7]+[lL]? { parser_lval.num = strtoul(yytext+2, 0, 8); return toupper(yytext[yyleng-1]) == 'L' ? tLNUMBER : tNUMBER; }
[0-9]+[lL]? { parser_lval.num = xstrtoul(yytext, 0, 10); return toupper(yytext[yyleng-1]) == 'L' ? tLNUMBER : tNUMBER; }
0[xX][0-9A-Fa-f]+[lL]? { parser_lval.num = xstrtoul(yytext, 0, 16); return toupper(yytext[yyleng-1]) == 'L' ? tLNUMBER : tNUMBER; }
0[oO][0-7]+[lL]? { parser_lval.num = xstrtoul(yytext+2, 0, 8); return toupper(yytext[yyleng-1]) == 'L' ? tLNUMBER : tNUMBER; }
/*
* The next two rules scan identifiers and filenames.