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/* See LICENSE file for copyright and license details. */
/**
* Version of `printf` that allocates, on the heap, a
* sufficiently large string and writes the output to it
*
* @param strp Output pointer for string, will be set to `NULL`
* on failure, however portable applications should
* assume that it may also be unmodified or a recently
* freed pointer if `asprintf` is used rather than
* `libsimple_asprintf` explicitly
* @param fmt The format string
* @param ... The format argument
* @return The length of the output on success, -1 on error
* @throws EMFILE {FOPEN_MAX} streams are currently open in the calling process
* @throws ENOMEM Could not allocate enough memory
* @throws Any error specified for `fprintf`
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__(1, 2), __format__(__printf__, 2, 3))))
int libsimple_asprintf(char **, const char *, ...);
#ifndef asprintf
# define asprintf libsimple_asprintf
#endif
/**
* Version of `vprintf` that allocates, on the heap, a
* sufficiently large string and writes the output to it
*
* @param strp Output pointer for string, will be set to `NULL`
* on failure, however portable applications should
* assume that it may also be unmodified or a recently
* freed pointer if `asprintf` is used rather than
* `libsimple_asprintf` explicitly
* @param fmt The format string
* @param ap The format argument
* @return The length of the output on success, -1 on error
* @throws EMFILE {FOPEN_MAX} streams are currently open in the calling process
* @throws ENOMEM Could not allocate enough memory
* @throws Any error specified for `fprintf`
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__(1, 2))))
int libsimple_vasprintf(char **, const char *, va_list);
#ifndef vasprintf
# define vasprintf libsimple_vasprintf
#endif
/**
* Version of `printf` that allocates, on the stack, a
* sufficiently large string and writes the output to it
*
* This macro does not check whether it can allocate
* enough memory, if it cannot, the kernel may kill the
* thread, and possibly the process, with a SIGSEGV signal
*
* @param fmt The format string
* @param ... The format argument
* @return The formatted string, `NULL` on error
* @throws Any error specified for `snprintf`
*/
#if defined(__GNUC__) || defined(__clang__)
# define libsimple_asprintfa(__fmt, ...)\
({\
const char *__f = (__fmt);\
char *__ret = NULL;\
int __r = snprintf(NULL, 0, __f, __VA_ARGS__);\
if (__r >= 0) {\
__ret = alloca((size_t)__r + 1);\
sprintf(__ret, __f, __VA_ARGS__);\
}\
__ret;\
})
# ifndef asprintfa
# define asprintfa(...) libsimple_asprintfa(__VA_ARGS__)
# endif
#endif
/**
* Version of `vprintf` that allocates, on the stack, a
* sufficiently large string and writes the output to it
*
* This macro does not check whether it can allocate
* enough memory, if it cannot, the kernel may kill the
* thread, and possibly the process, with a SIGSEGV signal
*
* @param fmt The format string
* @param ap The format argument
* @return The formatted string, `NULL` on error
* @throws Any error specified for `snprintf`
*/
#if defined(__GNUC__) || defined(__clang__)
# define libsimple_vasprintfa(__fmt, __ap)\
({\
const char *__f = (__fmt);\
va_list __a1;\
va_list __a2;\
char *__ret = NULL;\
int __r;\
va_copy(__a1, __ap);\
va_copy(__a2, __a1);\
__r = vsnprintf(NULL, 0, __f, __a1);\
if (__r >= 0) {\
__ret = alloca((size_t)__r + 1);\
vsprintf(__ret, __f, __a2);\
}\
va_end(__a2);\
va_end(__a1);\
__ret;\
})
# ifndef vasprintfa
# define vasprintfa(fmt, ap) libsimple_vasprintfa(fmt, ap)
# endif
#endif
/**
* Version of `vprintf` for printing error message;
* it prints to standard error (rather than standard
* output) and, unless `fmt` starts with "usage: "
* and unless `argv0` (global `char *`), prefixes
* the output with `"%s: ", argv0`; additionally, if
* `fmt` ends with ':', the output is suffixed with
* `" %s\n", strerror(errno)`, if `fmt` ends with
* neither ':' nor '\n', the outpt is suffixed with
* `\n`
*
* NB! This function uses `strerror` which is not
* thread-safe
*
* @param fmt The format string
* @param ap The format argument
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__(1))))
void libsimple_vweprintf(const char *, va_list);
#ifndef vweprintf
# define vweprintf libsimple_vweprintf
#endif
/**
* Version of `vprintf` for printing error message;
* it prints to standard error (rather than standard
* output) and, unless `fmt` starts with "usage: "
* and unless `argv0` (global `char *`), prefixes
* the output with `"%s: ", argv0`; additionally, if
* `fmt` ends with ':', the output is suffixed with
* `" %s\n", strerror(errno)`, if `fmt` ends with
* neither ':' nor '\n', the outpt is suffixed with
* `\n`
*
* NB! This function uses `strerror` which is not
* thread-safe
*
* @param fmt The format string
* @param ... The format argument
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__(1), __format__(__printf__, 1, 2))))
static inline void
libsimple_weprintf(const char *__fmt, ...)
{
va_list __ap;
va_start(__ap, __fmt);
libsimple_vweprintf(__fmt, __ap);
va_end(__ap);
}
#ifndef weprintf
# define weprintf libsimple_weprintf
#endif
/**
* Version of `vprintf` for printing error message;
* it prints to standard error (rather than standard
* output) and, unless `fmt` starts with "usage: "
* and unless `argv0` (global `char *`), prefixes
* the output with `"%s: ", argv0`; additionally, if
* `fmt` ends with ':', the output is suffixed with
* `" %s\n", strerror(errno)`, if `fmt` ends with
* neither ':' nor '\n', the outpt is suffixed with
* `\n`
*
* This function will exit the process
*
* NB! This function uses `strerror` which is not
* thread-safe
*
* @param status Exit value for the process
* @param fmt The format string
* @param ap The format argument
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__(2), __noreturn__)))
static inline void
libsimple_venprintf(int __status, const char *__fmt, va_list __ap)
{
libsimple_vweprintf(__fmt, __ap);
exit(__status);
}
#ifndef venprintf
# define venprintf libsimple_venprintf
#endif
/**
* Version of `vprintf` for printing error message;
* it prints to standard error (rather than standard
* output) and, unless `fmt` starts with "usage: "
* and unless `argv0` (global `char *`), prefixes
* the output with `"%s: ", argv0`; additionally, if
* `fmt` ends with ':', the output is suffixed with
* `" %s\n", strerror(errno)`, if `fmt` ends with
* neither ':' nor '\n', the outpt is suffixed with
* `\n`
*
* This function will exit the process
*
* NB! This function uses `strerror` which is not
* thread-safe
*
* @param status Exit value for the process
* @param fmt The format string
* @param ... The format argument
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__(2), __format__(__printf__, 2, 3), __noreturn__)))
static inline void
libsimple_enprintf(int __status, const char *__fmt, ...)
{
va_list __ap;
va_start(__ap, __fmt);
libsimple_venprintf(__status, __fmt, __ap);
va_end(__ap);
}
#ifndef enprintf
# define enprintf libsimple_enprintf
#endif
/**
* Version of `vprintf` for printing error message;
* it prints to standard error (rather than standard
* output) and, unless `fmt` starts with "usage: "
* and unless `argv0` (global `char *`), prefixes
* the output with `"%s: ", argv0`; additionally, if
* `fmt` ends with ':', the output is suffixed with
* `" %s\n", strerror(errno)`, if `fmt` ends with
* neither ':' nor '\n', the outpt is suffixed with
* `\n`
*
* This function will exit the process with the
* value `libsimple_default_failure_exit`
*
* NB! This function uses `strerror` which is not
* thread-safe
*
* @param fmt The format string
* @param ap The format argument
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__(1), __noreturn__)))
static inline void
libsimple_veprintf(const char *__fmt, va_list __ap)
{
libsimple_vweprintf(__fmt, __ap);
exit(libsimple_default_failure_exit);
}
#ifndef veprintf
# define veprintf libsimple_veprintf
#endif
/**
* Version of `vprintf` for printing error message;
* it prints to standard error (rather than standard
* output) and, unless `fmt` starts with "usage: "
* and unless `argv0` (global `char *`), prefixes
* the output with `"%s: ", argv0`; additionally, if
* `fmt` ends with ':', the output is suffixed with
* `" %s\n", strerror(errno)`, if `fmt` ends with
* neither ':' nor '\n', the outpt is suffixed with
* `\n`
*
* This function will exit the process with the
* value `libsimple_default_failure_exit`
*
* NB! This function uses `strerror` which is not
* thread-safe
*
* @param fmt The format string
* @param ... The format argument
*/
_LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__(1), __format__(__printf__, 1, 2), __noreturn__)))
static inline void
libsimple_eprintf(const char *__fmt, ...)
{
va_list __ap;
va_start(__ap, __fmt);
libsimple_veprintf(__fmt, __ap);
va_end(__ap);
}
#ifndef eprintf
# define eprintf libsimple_eprintf
#endif
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