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expr(1) didn't comply to Posix.2 and its own man page: any

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comparisions have been made as string comparisions, even in cases
where both operands clearly qualified as integers.

The fix is to make the parser properly analyzing whether an operand is
a valid integer or not.
This commit is contained in:
Joerg Wunsch 1995-08-04 17:08:07 +00:00
parent 048a238135
commit 2a353a9fb4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=9909
1 changed files with 13 additions and 1 deletions
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14
bin/expr/expr.y
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@ -4,7 +4,7 @@
*
* Largely rewritten by J.T. Conklin (jtc@wimsey.com)
*
* $Id: expr.y,v 1.8 1994/09/24 02:55:37 davidg Exp $
* $Id: expr.y,v 1.9 1995/03/19 13:28:41 joerg Exp $
*/
#include <stdio.h>
@ -107,13 +107,25 @@ make_str (s)
char *s;
{
struct val *vp;
int i, isint;
vp = (struct val *) malloc (sizeof (*vp));
if (vp == NULL || ((vp->u.s = strdup (s)) == NULL)) {
err (2, NULL);
}
for(i = 1, isint = isdigit(s[0]) || s[0] == '-';
isint && i < strlen(s);
i++)
{
if(!isdigit(s[i]))
isint = 0;
}
vp->type = string;
if(isint)
to_integer(vp);
return vp;
}