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config: generalise more things to be detected #12

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Merged
merged 1 commit into from
Oct 10, 2019
Merged

config: generalise more things to be detected #12

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60 changes: 15 additions & 45 deletions src/config.h
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Original file line number Diff line number Diff line change
Expand Up @@ -5,20 +5,28 @@
extern "C" {
#endif

#define HAVE_STDBOOL_H
#if !defined(__has_builtin)
#define __has_builtin(builtin) 0
#endif

#if !defined(__has_include)
#define __has_include(include) 0
#endif

#ifdef HAVE_STDBOOL_H
#if __STDC_VERSION__-0 >= 199901l || __has_include(<stdbool.h>)
#define HAVE_STDBOOL_H
#include <stdbool.h>
#elif !defined(__cplusplus)
typedef char bool;
#endif

#define HAVE___BUILTIN_EXPECT

#define HAVE___ATTRIBUTE__
#if __has_builtin(__builtin_expect)
#define HAVE___BUILTIN_EXPECT
#endif

#ifdef HAVE___ATTRIBUTE__
#define CMARK_ATTRIBUTE(list) __attribute__ (list)
#if defined(__GNUC__)
#define HAVE___ATTRIBUTE__
#define CMARK_ATTRIBUTE(list) __attribute__(list)
#else
#define CMARK_ATTRIBUTE(list)
#endif
Expand All @@ -31,44 +39,6 @@ extern "C" {
#endif
#endif

/* snprintf and vsnprintf fallbacks for MSVC before 2015,
due to Valentin Milea http://stackoverflow.com/questions/2915672/
*/

#if defined(_MSC_VER) && _MSC_VER < 1900

#include <stdio.h>
#include <stdarg.h>

#define snprintf c99_snprintf
#define vsnprintf c99_vsnprintf

CMARK_INLINE int c99_vsnprintf(char *outBuf, size_t size, const char *format, va_list ap)
{
int count = -1;

if (size != 0)
count = _vsnprintf_s(outBuf, size, _TRUNCATE, format, ap);
if (count == -1)
count = _vscprintf(format, ap);

return count;
}

CMARK_INLINE int c99_snprintf(char *outBuf, size_t size, const char *format, ...)
{
int count;
va_list ap;

va_start(ap, format);
count = c99_vsnprintf(outBuf, size, format, ap);
va_end(ap);

return count;
}

#endif

#ifdef __cplusplus
}
#endif
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