Andrew's git - gitweb.git/blob

   1#include "../git-compat-util.h"
   2
   3/*
   4 * The size parameter specifies the available space, i.e. includes
   5 * the trailing NUL byte; but Windows's vsnprintf expects the
   6 * number of characters to write without the trailing NUL.
   7 */
   8#ifndef SNPRINTF_SIZE_CORR
   9#define SNPRINTF_SIZE_CORR 0
  10#endif
  11
  12#undef vsnprintf
  13int git_vsnprintf(char *str, size_t maxsize, const char *format, va_list ap)
  14{
  15        char *s;
  16        int ret = -1;
  17
  18        if (maxsize > 0) {
  19                ret = vsnprintf(str, maxsize-SNPRINTF_SIZE_CORR, format, ap);
  20                /* Windows does not NUL-terminate if result fills buffer */
  21                str[maxsize-1] = 0;
  22        }
  23        if (ret != -1)
  24                return ret;
  25
  26        s = NULL;
  27        if (maxsize < 128)
  28                maxsize = 128;
  29
  30        while (ret == -1) {
  31                maxsize *= 4;
  32                str = realloc(s, maxsize);
  33                if (! str)
  34                        break;
  35                s = str;
  36                ret = vsnprintf(str, maxsize-SNPRINTF_SIZE_CORR, format, ap);
  37        }
  38        free(s);
  39        return ret;
  40}
  41
  42int git_snprintf(char *str, size_t maxsize, const char *format, ...)
  43{
  44        va_list ap;
  45        int ret;
  46
  47        va_start(ap, format);
  48        ret = git_vsnprintf(str, maxsize, format, ap);
  49        va_end(ap);
  50
  51        return ret;
  52}
  53