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| -rw-r--r-- | .dir-locals.el | 5 | ||||
| -rw-r--r-- | .gitignore | 2 | ||||
| -rw-r--r-- | LICENSE | 24 | ||||
| -rw-r--r-- | vec.h | 112 |
4 files changed, 143 insertions, 0 deletions
diff --git a/.dir-locals.el b/.dir-locals.el new file mode 100644 index 0000000..380da03 --- /dev/null +++ b/.dir-locals.el @@ -0,0 +1,5 @@ +;;; Directory Local Variables -*- no-byte-compile: t; -*- +;;; For more information see (info "(emacs) Directory Variables") + +((nil . ((+license/license-choice . "Unlicense"))) + (c-mode . ((mode . clang-format)))) diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..e1ab63f --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +TAGS +main*
\ No newline at end of file @@ -0,0 +1,24 @@ +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>
\ No newline at end of file @@ -0,0 +1,112 @@ +/* Copyright (C) 2024 Aryadev Chavali + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Unlicense + * for details. + + * You may distribute and modify this code under the terms of the + * Unlicense, which you should have received a copy of along with this + * program. If not, please go to <https://unlicense.org/>. + + * Created: 2024-10-01 + * Author: Aryadev Chavali + * Description: A dynamically sized container. + */ + +#ifndef VEC_H +#define VEC_H + +#include <stdint.h> + +typedef struct +{ + uint32_t size, capacity; + uint8_t bytes[]; +} vec_t; + +#define VEC_GET(P) (((vec_t *)(P)) - 1) +#define VEC_SIZE(P) (VEC_GET(P)->size) +#define VEC_CAP(P) (VEC_GET(P)->capacity) + +void vec_make(void **ptr, uint32_t size); +void vec_free(void **ptr); +void vec_append_byte(void **ptr, uint8_t byte); +void vec_append(void **ptr, void *data, uint32_t size); +void vec_clone(void **dest, void **src); +void vec_ensure_remaining(void **ptr, uint32_t space); + +#define VEC_IMPL +#ifdef VEC_IMPL + +#include <malloc.h> +#include <string.h> + +#ifndef MAX +#define MAX(A, B) ((A) > (B) ? (A) : (B)) +#endif + +#ifndef MIN +#define MIN(A, B) ((A) < (B) ? (A) : (B)) +#endif + +void vec_make(void **ptr, uint32_t size) +{ + if (!ptr) + return; + vec_t *vector = calloc(1, sizeof(*vector) + size); + vector->size = 0; + vector->capacity = size; + *ptr = (vector + 1); +} + +void vec_free(void **data) +{ + if (!data || !*data) + return; + free(VEC_GET(*data)); + *data = NULL; +} + +void vec_ensure_remaining(void **ptr, uint32_t space) +{ + if (!ptr || !*ptr) + return; + vec_t *vec = VEC_GET(*ptr); + if (vec->capacity - vec->size < space) + { + void *new_vec = NULL; + vec_make(&new_vec, MAX(vec->capacity * 2, vec->size + space)); + VEC_SIZE(new_vec) = vec->size; + memcpy(new_vec, *ptr, vec->size); + vec_free(ptr); + *ptr = new_vec; + } +} + +void vec_append_byte(void **ptr, uint8_t byte) +{ + vec_ensure_remaining(ptr, 1); + vec_t *vec = VEC_GET(*ptr); + vec->bytes[vec->size++] = byte; +} + +void vec_append(void **ptr, void *data, uint32_t size) +{ + vec_ensure_remaining(ptr, size); + vec_t *vec = VEC_GET(*ptr); + memcpy(vec->bytes + vec->size, data, size); + vec->size += size; +} + +void vec_clone(void **dest, void **src) +{ + if (!dest || !src || !*src) + return; + vec_make(dest, VEC_SIZE(*src)); + memcpy(*dest, *src, VEC_SIZE(*src)); + VEC_SIZE(*dest) = VEC_SIZE(*src); +} +#endif + +#endif |