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Add a special attribute to printf-like funcs

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Enables extra compile-time checks

CL: none

PUBLISHED_FROM=9f7d658fbda5c721cf40293bf29967bb056d0437
This commit is contained in:
Deomid Ryabkov authored and Cesanta Bot committed 2018-04-13 17:12:06 +00:00
1 parent 43191db63e
commit 43b5a4e735
4 files changed
+28 -14
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mongoose.h
+15 -3
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@@ -128,8 +128,18 @@
/* Common stuff */
#if !defined(PRINTF_LIKE)
#if defined(__GNUC__) || defined(__clang__) || defined(__TI_COMPILER_VERSION__)
#define PRINTF_LIKE(f, a) __attribute__((format(printf, f, a)))
#else
#define PRINTF_LIKE(f, a)
#endif
#endif
#if !defined(WEAK)
#if (defined(__GNUC__) || defined(__TI_COMPILER_VERSION__)) && !defined(_WIN32)
#if (defined(__GNUC__) || defined(__clang__) || \
defined(__TI_COMPILER_VERSION__)) && \
!defined(_WIN32)
#define WEAK __attribute__((weak))
#else
#define WEAK
@@ -2397,7 +2407,8 @@ size_t c_strnlen(const char *s, size_t maxlen);
/*
* Equivalent of standard `snprintf()`.
*/
int c_snprintf(char *buf, size_t buf_size, const char *format, ...);
int c_snprintf(char *buf, size_t buf_size, const char *format, ...)
PRINTF_LIKE(3, 4);
/*
* Equivalent of standard `vsnprintf()`.
@@ -2465,7 +2476,8 @@ int mg_casecmp(const char *s1, const char *s2);
*
* The purpose of this is to avoid malloc-ing if generated strings are small.
*/
int mg_asprintf(char **buf, size_t size, const char *fmt, ...);
int mg_asprintf(char **buf, size_t size, const char *fmt, ...)
PRINTF_LIKE(3, 4);
/* Same as mg_asprintf, but takes varargs list. */
int mg_avprintf(char **buf, size_t size, const char *fmt, va_list ap);