src/errno/strerror.c

   1 #include <errno.h>
   2 #include <stddef.h>
   3 #include <string.h>
   4 #include "locale_impl.h"
   5
   6 /* mips has one error code outside of the 8-bit range due to a
   7  * historical typo, so we just remap it. */
   8 #if EDQUOT==1133
   9 #define EDQUOT_ORIG 1133
  10 #undef  EDQUOT
  11 #define EDQUOT 109
  12 #endif
  13
  14 static const struct errmsgstr_t {
  15 #define E(n, s) char str##n[sizeof(s)];
  16 #include "__strerror.h"
  17 #undef E
  18 } errmsgstr = {
  19 #define E(n, s) s,
  20 #include "__strerror.h"
  21 #undef E
  22 };
  23
  24 static const unsigned short errmsgidx[] = {
  25 #define E(n, s) [n] = offsetof(struct errmsgstr_t, str##n),
  26 #include "__strerror.h"
  27 #undef E
  28 };
  29
  30 char *__strerror_l(int e, locale_t loc)
  31 {
  32         const char *s;
  33 #ifdef EDQUOT_ORIG
  34         if (e==EDQUOT) e=0;
  35         else if (e==EDQUOT_ORIG) e=EDQUOT;
  36 #endif
  37         if (e >= sizeof errmsgidx / sizeof *errmsgidx) e = 0;
  38         s = (char *)&errmsgstr + errmsgidx[e];
  39         return (char *)LCTRANS(s, LC_MESSAGES, loc);
  40 }
  41
  42 char *strerror(int e)
  43 {
  44         return __strerror_l(e, CURRENT_LOCALE);
  45 }
  46
  47 weak_alias(__strerror_l, strerror_l);