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Fix expression handling for string comparisions without quotes (bug #4478)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5919 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Spencer
2005-06-17 00:33:00 +00:00
parent e0f057820a
commit 10542f6145
3 changed files with 20 additions and 7 deletions
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7
ast_expr2.fl
View File

@@ -32,6 +32,7 @@ struct val {
#define SET_COLUMNS yylloc_param->first_column = (int)(yyg->yytext_r - YY_CURRENT_BUFFER_LVALUE->yy_ch_buf);yylloc_param->last_column = yylloc_param->last_column + yyleng - 1; yylloc_param->first_line = yylloc_param->last_line = 1
#define SET_STRING yylval_param->val = (struct val *)calloc(sizeof(struct val),1); yylval_param->val->type = AST_EXPR_string; yylval_param->val->u.s = strdup(yytext);
#define SET_NUMERIC_STRING yylval_param->val = (struct val *)calloc(sizeof(struct val),1); yylval_param->val->type = AST_EXPR_numeric_string; yylval_param->val->u.s = strdup(yytext);
struct parse_io
{
@@ -74,10 +75,8 @@ struct parse_io
\"[^"]*\" {SET_COLUMNS; SET_STRING; return TOKEN;}
[\n] {/* what to do with eol */}
[0-9]+ { SET_COLUMNS;
yylval_param->val = (struct val *)calloc(sizeof(struct val),1);
yylval_param->val->type = AST_EXPR_integer;
yylval_param->val->u.i = atoi(yytext);
[0-9]+ { SET_COLUMNS; /* the original behavior of the expression parser was to bring in numbers as a numeric string */
SET_NUMERIC_STRING;
return TOKEN;}
[a-zA-Z0-9,.?';{}\\_^%$#@!]+ {SET_COLUMNS; SET_STRING; return TOKEN;}

12
ast_expr2.y
View File

@@ -296,10 +296,11 @@ to_integer (struct val *vp)
/* vp->type == AST_EXPR_numeric_string, make it numeric */
errno = 0;
i = strtoq(vp->u.s, (char**)NULL, 10);
i = strtoll(vp->u.s, (char**)NULL, 10);
if (errno != 0) {
ast_log(LOG_WARNING,"Conversion of %s to integer under/overflowed!\n", vp->u.s);
free(vp->u.s);
ast_log(LOG_WARNING,"overflow\n");
vp->u.s = 0;
return(0);
}
free (vp->u.s);
@@ -433,8 +434,15 @@ op_eq (struct val *a, struct val *b)
to_string (b);
r = make_integer ((quad_t)(strcoll (a->u.s, b->u.s) == 0));
} else {
#ifdef DEBUG_FOR_CONVERSIONS
char buffer[2000];
sprintf(buffer,"Converting '%s' and '%s' ", a->u.s, b->u.s);
#endif
(void)to_integer(a);
(void)to_integer(b);
#ifdef DEBUG_FOR_CONVERSIONS
ast_log(LOG_WARNING,"%s to '%lld' and '%lld'\n", buffer, a->u.i, b->u.i);
#endif
r = make_integer ((quad_t)(a->u.i == b->u.i));
}

8
doc/README.variables
View File

@@ -310,7 +310,13 @@ Of course, all of the above examples use constants, but would work the same if a
numeric or string constants were replaced with a variable reference ${CALLERIDNUM}, for
instance.
__________________________
NUMBERS VS STRINGS
--------------------------
Tokens consisting only of numbers are converted to 64-bit numbers for most of the
operators. This means that overflows can occur when the numbers get above 18 digits.
Warnings will appear in the logs in this case.
___________________________
CONDITIONALS
---------------------------