+/*
+ * This is free and unencumbered software released into the public domain.
+ *
+ * Anyone is free to copy, modify, publish, use, compile, sell, or
+ * distribute this software, either in source code form or as a compiled
+ * binary, for any purpose, commercial or non-commercial, and by any
+ * means.
+ *
+ * In jurisdictions that recognize copyright laws, the author or authors
+ * of this software dedicate any and all copyright interest in the
+ * software to the public domain. We make this dedication for the benefit
+ * of the public at large and to the detriment of our heirs and
+ * successors. We intend this dedication to be an overt act of
+ * relinquishment in perpetuity of all present and future rights to this
+ * software under copyright law.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * For more information, please refer to <https://unlicense.org>
+ */
+
/* https://git.datadissipation.net */
#ifndef ASPRINTF_H_
- #define ASPRINTF_H_ 1
+ #define ASPRINTF_H_ 1
- #ifdef ASPRINTF_INCLUDE_LIBC_
+ #ifdef ASPRINTF_INCLUDE_LIBC
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
- #endif
+ #endif /* ASPRINTF_INCLUDE_LIBC */
#ifndef HAVE_ASPRINTF
- int vasprintf_(char **strp, const char *fmt, va_list ap);
- int asprintf_(char **strp, const char *fmt, ...);
- /*
- * Credit for a big part of the macro madness:
- * Jens Gustedt
- * https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
- */
- #define vasprintf(s, f, a) vasprintf_(s, f, a)
- #define I_COND_COMMA_(...) ,
- #define I_PICK_ARG_(_1, _2, ARG, ...) ARG
- #define I_HAS_COMMA_(...) I_PICK_ARG_(__VA_ARGS__, 1, 0)
-
- #define I_ISEMPTY_(...) \
- II_ISEMPTY_( \
- /* test if there is just one argument, eventually an empty \
- one */ \
- I_HAS_COMMA_(__VA_ARGS__), \
- /* test if I_COND_COMMA_ together with the argument \
- adds a comma */ \
- I_HAS_COMMA_(I_COND_COMMA_ __VA_ARGS__), \
- /* test if the argument together with a parenthesis \
- adds a comma */ \
- I_HAS_COMMA_(__VA_ARGS__ (/*empty*/)), \
- /* test if placing it between I_COND_COMMA_ and the \
- parenthesis adds a comma */ \
- I_HAS_COMMA_(I_COND_COMMA_ __VA_ARGS__ (/*empty*/)) \
- )
-
- #define I_PASTE5_(_0, _1, _2, _3, _4) _0 ## _1 ## _2 ## _3 ## _4
- #define II_ISEMPTY_(_0, _1, _2, _3)\
- I_HAS_COMMA_(I_PASTE5_(I_IS_EMPTY_CASE_, _0, _1, _2, _3))
- #define I_IS_EMPTY_CASE_0001 ,
-
- #define II_PASTE_(a) I_EMPTY_##a
- #define I_PASTE_(a) II_PASTE_(a)
-
- #define I_GET_ARG_(...) I_PICK_ARG_(__VA_ARGS__)
- #define asprintf(s, f, ...)\
- asprintf_(s, f I_PASTE_(I_ISEMPTY_(I_GET_ARG_(, , __VA_ARGS__))) __VA_ARGS__)
- #define I_EMPTY_1
- #define I_EMPTY_0 I_COND_COMMA_()
- #endif
-
- #ifdef ASPRINTF_IMPLEMENTATION_
- int
- vasprintf_(char **strp, const char *fmt, va_list ap)
- {
- int size, ret;
- va_list tp;
+ #define HAVE_ASPRINTF 1
+ #define asprintf i_asprintf_
+ #define vasprintf i_vasprintf_
+int i_vasprintf_(char **strp, const char *fmt, va_list ap);
+int i_asprintf_(char **strp, const char *fmt, ...);
+ #endif /* !HAVE_ASPRINTF */
- va_copy(tp, ap);
- size = vsnprintf(NULL, 0, fmt, tp);
- va_end(tp);
+ #ifdef ASPRINTF_IMPLEMENTATION
+int
+i_vasprintf_(char **strp, const char *fmt, va_list ap)
+{
+ int size;
+ va_list tp;
- if (size < 0) {
- return -1;
- }
- *strp = malloc(size + 1);
- if (*strp == NULL) {
- return -1;
- }
+ va_copy(tp, ap);
+ size = vsnprintf(NULL, 0, fmt, tp);
+ va_end(tp);
- ret = vsnprintf(*strp, size + 1, fmt, ap);
- if (ret < 0) {
- free(*strp);
- return -1;
- }
+ if (size < 0 || !(*strp = malloc(size + 1)))
+ return -1;
- return ret;
- }
+ return vsnprintf(*strp, size + 1, fmt, ap);
+}
- int
- asprintf_(char **strp, const char *fmt, ...)
- {
- int ret;
- va_list ap;
+int
+i_asprintf_(char **strp, const char *fmt, ...)
+{
+ int ret;
+ va_list ap;
- va_start(ap, fmt);
- ret = vasprintf(strp, fmt, ap);
- va_end(ap);
+ va_start(ap, fmt);
+ ret = i_vasprintf_(strp, fmt, ap);
+ va_end(ap);
- return ret;
- }
- #endif
-#endif
+ return ret;
+}
+ #endif /* ASPRINTF_IMPLEMENTATION */
+#endif /* !ASPRINTF_H_ */
/ index / single-header-libcext.git / blobdiff