remove "program_invocation_short_name" dependency for Linux

[libcext.git] / asprintf.h

diff --git a/asprintf.h b/asprintf.h
index 866479636ad1d819c7be67ea4b78d2e5d419d9cb..a22a6fbbade4ec97be6a3212f14f0bf605bc8983 100644 (file)
--- a/asprintf.h
+++ b/asprintf.h
@@ -1,22 +1,56 @@
+/*
+ * 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_
+ #define ASPRINTF_H_ 1
 
- #ifdef ASPRINTF_INCLUDE_LIBC_
+ #ifdef ASPRINTF_INCLUDE_LIBC
   #include <stdarg.h>
   #include <stdio.h>
   #include <stdlib.h>
  #endif
 
  #ifndef HAVE_ASPRINTF
-  int vasprintf_(char **strp, const char *fmt, va_list ap);
-  int asprintf_(char **strp, const char *fmt, ...);
+  #define HAVE_ASPRINTF 1
+  int i_vasprintf_(char **restrict strp, const char *restrict fmt, va_list ap);
+  int i_asprintf_(char **restrict strp, const char *restrict fmt, ...);
   /* 
    * Credit for a big part of the macro madness:
-   * Jens Gudstedt
+   * Jens Gustedt
    * https://gustedt.wordpress.com/2010/06/08/detect-empty-macro-arguments/
    */
-  #define vasprintf(s, f, a)   vasprintf_(s, f, a)
+
+  /*
+   * This isn't strict C99, because C99 requires at least one argument in "..."
+   * for macros. Still, I haven't encountered a compiler that won't preprocess 
+   * this right (out of the popular ones, MSVC wasn't tested)
+   */
+  #define vasprintf(s, f, a)   i_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)
@@ -47,13 +81,15 @@
 
   #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__)
+  i_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
+ #endif /* !HAVE_ASPRINTF */
 
- #ifdef ASPRINTF_IMPLEMENTATION_
- int vasprintf_(char **strp, const char *fmt, va_list ap) {
+ #ifdef ASPRINTF_IMPLEMENTATION
+ int
+ i_vasprintf_(char **restrict strp, const char *restrict fmt, va_list ap)
+ {
         int size, ret;
         va_list tp;
 
@@ -78,15 +114,17 @@
         return ret;
  }
 
- int asprintf_(char **strp, const char *fmt, ...) {
+ int
+ i_asprintf_(char **restrict strp, const char *restrict 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;
  }
- #endif
-#endif
+ #endif /* ASPRINTF_IMPLEMENTATION */
+#endif /* !ASPRINTF_H_ */