diff options
Diffstat (limited to 'arr.c')
| -rw-r--r-- | arr.c | 30 |
1 files changed, 8 insertions, 22 deletions
@@ -1,27 +1,5 @@ #ifndef ARR_C_ #define ARR_C_ -/* -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 <http://unlicense.org/> -*/ // functions in this file suffixed with _ are not meant to be used outside here, unless you // know what you're doing @@ -29,6 +7,9 @@ For more information, please refer to <http://unlicense.org/> // IMPORTANT NOTE: If you are using this with structures containing `long double`s, do // #define ARR_LONG_DOUBLE // before including this file +// ( otherwise the long doubles will not be aligned. +// this does mean that arrays waste 8 bytes of memory. +// which isnt important unless you're making a lot of arrays.) #include <stddef.h> typedef union { @@ -60,6 +41,10 @@ static inline u32 arr_len(void *arr) { return arr ? arr_hdr_(arr)->len : 0; } +static inline u32 arr_cap(void *arr) { + return arr ? arr_hdr_(arr)->cap : 0; +} + static inline unsigned arr_lenu(void *arr) { return (unsigned)arr_len(arr); } @@ -114,6 +99,7 @@ static void arr_reserve_(void **arr, size_t member_size, size_t n) { if (!*arr) { // create a new array with capacity n+1 + // why n+1? i dont know i wrote this a while ago ArrHeader *hdr = calloc(1, sizeof(ArrHeader) + (n+1) * member_size); if (hdr) { hdr->cap = (u32)n+1; |