From: Fabian Keil <fk@fabiankeil.de>
Date: Fri, 26 Feb 2016 12:32:26 +0000 (+0000)
Subject: get_number_param(): Simplify code by using strtol()
X-Git-Tag: v_3_0_25~136
X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=commitdiff_plain;h=204cd3f81d7b8505d87d7eedf2601ee6e004ec20

get_number_param(): Simplify code by using strtol()
---

diff --git a/cgi.c b/cgi.c
index 1307b87e..114eae89 100644
--- a/cgi.c
+++ b/cgi.c
@@ -1,4 +1,4 @@
-const char cgi_rcs[] = "$Id: cgi.c,v 1.159 2014/10/18 11:31:25 fabiankeil Exp $";
+const char cgi_rcs[] = "$Id: cgi.c,v 1.160 2014/10/18 11:31:52 fabiankeil Exp $";
 /*********************************************************************
  *
  * File        :  $Source: /cvsroot/ijbswa/current/cgi.c,v $
@@ -807,8 +807,7 @@ jb_err get_number_param(struct client_state *csp,
                         unsigned *pvalue)
 {
    const char *param;
-   char ch;
-   unsigned value;
+   char *endptr;
 
    assert(csp);
    assert(parameters);
@@ -823,36 +822,12 @@ jb_err get_number_param(struct client_state *csp,
       return JB_ERR_CGI_PARAMS;
    }
 
-   /* We don't use atoi because I want to check this carefully... */
-
-   value = 0;
-   while ((ch = *param++) != '\0')
+   *pvalue = (unsigned int)strtol(param, &endptr, 0);
+   if (*endptr != '\0')
    {
-      if ((ch < '0') || (ch > '9'))
-      {
-         return JB_ERR_CGI_PARAMS;
-      }
-
-      ch = (char)(ch - '0');
-
-      /* Note:
-       *
-       * <limits.h> defines UINT_MAX
-       *
-       * (UINT_MAX - ch) / 10 is the largest number that
-       *     can be safely multiplied by 10 then have ch added.
-       */
-      if (value > ((UINT_MAX - (unsigned)ch) / 10U))
-      {
-         return JB_ERR_CGI_PARAMS;
-      }
-
-      value = value * 10 + (unsigned)ch;
+      return JB_ERR_CGI_PARAMS;
    }
 
-   /* Success */
-   *pvalue = value;
-
    return JB_ERR_OK;
 
 }