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1. Embed this notice
   Leah Rowe is not a Rowebot (libreleah@mas.to)'s status on Sunday, 22-Mar-2026 20:34:36 JST Leah Rowe is not a Rowebot

   /* SPDX-License-Identifier: MIT */

   int
   scmp(const char *a,
   const char *b,
   size_t maxlen,
   int *rval)
   {
   size_t ch;
   unsigned char ac;
   unsigned char bc;

   if (a == NULL ||
   b == NULL ||
   rval == NULL) {

   errno = EFAULT;
   return -1;
   }

   for (ch = 0; ch < maxlen; ch++) {

   ac = (unsigned char)a[ch];
   bc = (unsigned char)b[ch];

   if (ac != bc) {
   *rval = ac - bc;
   return 0;
   }

   if (ac == '\0') {
   *rval = 0;
   return 0;
   }
   }

   errno = EFAULT;
   return -1;
   }

   • Embed this notice
     Leah Rowe is not a Rowebot (libreleah@mas.to)'s status on Sunday, 22-Mar-2026 20:36:35 JST Leah Rowe is not a Rowebot

     in reply to

     /* SPDX-License-Identifier: MIT */

     int
     slen(const char *s,
     size_t maxlen,
     size_t *rval)
     {
     size_t ch;

     if (s == NULL ||
     rval == NULL) {

     errno = EFAULT;
     return -1;
     }

     for (ch = 0;
     ch < maxlen && s[ch] != '\0';
     ch++);

     if (ch == maxlen) {
     /* unterminated */
     errno = EFAULT;
     return -1;
     }

     *rval = ch;
     return 0;
     }

     /* we've been doing unix wrong since 1982 */

   • Embed this notice
     Leah Rowe is not a Rowebot (libreleah@mas.to)'s status on Sunday, 22-Mar-2026 20:44:18 JST Leah Rowe is not a Rowebot

     in reply to

     • Howard Chu @ Symas

     @hyc i use scmp/slen in this code:

     https://av.vimuser.org/mkhtemp-nvmutil-wip.c.txt

     note that this version is work-in-progress (not committed yet). it's for nvmutil, my mac address editor for Intel GbE NVM config, which has now turned into me replacing mktemp.

     i call it: mkhtemp

     dir support added later (for now files only). it resists TOCTUO attacks, and when it's done, standalone mkhutil util will also be modified to work like regular mktemp when you type "mktemp" - otherwise if typing mkhtemp, it will be hard af.

   • Embed this notice
     Howard Chu @ Symas (hyc@mastodon.social)'s status on Sunday, 22-Mar-2026 20:44:19 JST Howard Chu @ Symas

     in reply to

     @libreleah agreed. I wrote LMDB this way as well, return from functions is an error code or 0 for success; any values to be returned go thru the parameter list.

     The C standard string functions suck. https://mastodon.social/@hyc/111596133680619519