revise README

[libcext.git] / asprintf.h

diff --git a/asprintf.h b/asprintf.h
index dc944df384cceed12d21c5aed606a7c0c07bf6d5..6d3341ae7c27f85aaa87bca5a839b294eff21e6e 100644 (file)
--- a/asprintf.h
+++ b/asprintf.h
@@ -1,60 +1,51 @@
+/*
+ * 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
 
 /* https://git.datadissipation.net */
 #ifndef ASPRINTF_H_
  #define ASPRINTF_H_ 1
 

- #ifdef ASPRINTF_INCLUDE_LIBC_
+ #ifdef ASPRINTF_INCLUDE_LIBC

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

- #endif
+ #endif /* ASPRINTF_INCLUDE_LIBC */

 
  #ifndef HAVE_ASPRINTF
 
  #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
+  #define HAVE_ASPRINTF 1
+  #define asprintf  i_asprintf_
+  #define vasprintf i_vasprintf_
+  int i_vasprintf_(char **restrict strp, const char *restrict fmt, va_list ap);
+  int i_asprintf_(char **restrict strp, const char *restrict fmt, ...);
+ #endif /* !HAVE_ASPRINTF */

 
 

- #ifdef ASPRINTF_IMPLEMENTATION_
+ #ifdef ASPRINTF_IMPLEMENTATION

  int
  int

- vasprintf_(char **strp, const char *fmt, va_list ap)
+ i_vasprintf_(char **restrict strp, const char *restrict fmt, va_list ap)

  {
         int size, ret;
         va_list tp;
  {
         int size, ret;
         va_list tp;


@@ -81,16 +72,16 @@
  }
 
  int
  }
 
  int

- asprintf_(char **strp, const char *fmt, ...)
+ i_asprintf_(char **restrict strp, const char *restrict fmt, ...)

  {
         int ret;
         va_list ap;
 
         va_start(ap, fmt);
  {
         int ret;
         va_list ap;
 
         va_start(ap, fmt);

-        ret = vasprintf(strp, fmt, ap);
+        ret = i_vasprintf_(strp, fmt, ap);

         va_end(ap);
 
         return ret;
  }
         va_end(ap);
 
         return ret;
  }

- #endif
-#endif
+ #endif /* ASPRINTF_IMPLEMENTATION */
+#endif /* !ASPRINTF_H_ */