README.md

   1 A (WIP) collection of portable, strict C99, single-header implementations of common libc extensions.
   2
   3 ### How to
   4
   5 Include the header in every file needed as usual:
   6
   7 ```
   8 #include "<ext-func-name>.h"
   9 ```
  10
  11 In the file chosen for the function implementation:
  12
  13 ```
  14 #define <EXT-FUNC-NAME>_IMPLEMENTATION
  15 #include "<ext-func-name.h>"
  16 ```
  17
  18 By default, the header won't have any stdlib includes, change that with:
  19
  20 ```
  21 #define <EXT-FUNC-NAME>_INCLUDE_LIBC
  22 ```
  23
  24 Or disable function, type and variable override with:
  25
  26 ```
  27 #define HAVE_<EXT-FUNC-NAME>
  28 ```
  29
  30 ### Specifics
  31
  32 ---
  33
  34 ### asprintf
  35
  36 includes `vasprintf()` and `asprintf()`
  37
  38 ---
  39
  40 ### getopt\_long
  41
  42 includes `getopt()`, `getsubopt()`, `getopt_long()` and `getopt_long_only`
  43
  44 `getopt_long.h` has additional macros related to argument
  45 permuting, defining those enables it (GNU behaviour, will still be disabled with `$POSIXLY_CORRECT` set):
  46
  47 ```
  48 #define GETOPT_PERMUTE_ARGS
  49 #define GETOPT_LONG_PERMUTE_ARGS
  50 #define GETOPT_LONG_ONLY_PERMUTE_ARGS
  51 ```
  52
  53 ---
  54