src/util/snprintf.h

   1 #ifndef EL__UTIL_SNPRINTF_H
   2 #define EL__UTIL_SNPRINTF_H
   3
   4
   5 /* Do not use a 'format' token here as it gets defined at some dirty stinking
   6  * places of ELinks, causing bug 244 (read as "compilation failures"). 'fmt'
   7  * should do fine. --pasky */
   8
   9
  10 #include <stdarg.h>
  11
  12 /* XXX: This is not quite the best place for it, perhaps. But do we have
  13  * a better one now? --pasky */
  14 #ifndef VA_COPY
  15 #ifdef HAVE_VA_COPY
  16 #define VA_COPY(dest, src) __va_copy(dest, src)
  17 #else
  18 #define VA_COPY(dest, src) (dest) = (src)
  19 #endif
  20 #endif
  21
  22 #ifdef CONFIG_OWN_LIBC
  23 #undef HAVE_VSNPRINTF
  24 #undef HAVE_C99_VSNPRINTF
  25 #undef HAVE_SNPRINTF
  26 #undef HAVE_C99_SNPRINTF
  27 #undef HAVE_VASPRINTF
  28 #undef HAVE_ASPRINTF
  29 #else
  30 #include <stdio.h> /* The system's snprintf(). */
  31 #endif
  32
  33
  34 #if !defined(HAVE_VSNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
  35 #undef vsnprintf
  36 #define vsnprintf elinks_vsnprintf
  37 int elinks_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
  38 #endif
  39
  40 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_C99_VSNPRINTF)
  41 #undef snprintf
  42 #define snprintf elinks_snprintf
  43 int elinks_snprintf(char *str, size_t count, const char *fmt, ...);
  44 #endif
  45
  46
  47 #ifndef HAVE_VASPRINTF
  48 #undef vasprintf
  49 #define vasprintf elinks_vasprintf
  50 int elinks_vasprintf(char **ptr, const char *fmt, va_list ap);
  51 #endif
  52
  53 #ifndef HAVE_ASPRINTF
  54 #undef asprintf
  55 #define asprintf elinks_asprintf
  56 int elinks_asprintf(char **ptr, const char *fmt, ...);
  57 #endif
  58
  59
  60 /* These are wrappers for (v)asprintf() which return the strings allocated by
  61  * ELinks' own memory allocation routines, thus it is usable in the context of
  62  * standard ELinks memory managment. Just use these if you mem_free() the
  63  * string later and use the original ones if you free() the string later. */
  64 #ifndef _GNU_SOURCE
  65 #define _GNU_SOURCE /* We want vasprintf() */
  66 #endif
  67
  68 #include <stdlib.h>
  69 #include "util/string.h"
  70
  71 int vasprintf(char **ptr, const char *fmt, va_list ap);
  72
  73 static inline unsigned char *
  74 vasprintfa(const char *fmt, va_list ap) {
  75         char *str1;
  76         unsigned char *str2;
  77         int size;
  78
  79         if (vasprintf(&str1, fmt, ap) < 0)
  80                 return NULL;
  81
  82         size = strlen(str1) + 1;
  83         str2 = mem_alloc(size);
  84         if (str2) memcpy(str2, str1, size);
  85         free(str1);
  86
  87         return str2;
  88 }
  89
  90 unsigned char *asprintfa(const char *fmt, ...);
  91
  92
  93 #endif