mirror of
https://github.com/git/git.git
synced 2024-11-24 18:33:43 +08:00
63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
#include "../git-compat-util.h"
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/*
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* The size parameter specifies the available space, i.e. includes
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* the trailing NUL byte; but Windows's vsnprintf expects the
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* number of characters to write, and does not necessarily write the
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* trailing NUL.
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*/
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#ifndef SNPRINTF_SIZE_CORR
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#if defined(__MINGW32__) && defined(__GNUC__) && __GNUC__ < 4
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#define SNPRINTF_SIZE_CORR 1
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#else
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#define SNPRINTF_SIZE_CORR 0
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#endif
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#endif
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#undef vsnprintf
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int git_vsnprintf(char *str, size_t maxsize, const char *format, va_list ap)
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{
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char *s;
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int ret = -1;
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if (maxsize > 0) {
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ret = vsnprintf(str, maxsize-SNPRINTF_SIZE_CORR, format, ap);
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if (ret == maxsize-1)
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ret = -1;
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/* Windows does not NUL-terminate if result fills buffer */
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str[maxsize-1] = 0;
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}
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if (ret != -1)
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return ret;
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s = NULL;
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if (maxsize < 128)
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maxsize = 128;
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while (ret == -1) {
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maxsize *= 4;
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str = realloc(s, maxsize);
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if (! str)
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break;
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s = str;
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ret = vsnprintf(str, maxsize-SNPRINTF_SIZE_CORR, format, ap);
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if (ret == maxsize-1)
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ret = -1;
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}
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free(s);
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return ret;
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}
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int git_snprintf(char *str, size_t maxsize, const char *format, ...)
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{
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va_list ap;
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int ret;
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va_start(ap, format);
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ret = git_vsnprintf(str, maxsize, format, ap);
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va_end(ap);
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return ret;
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}
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