1 /* 2 * Copyright (c) 2021 Calvin Rose 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a copy 5 * of this software and associated documentation files (the "Software"), to 6 * deal in the Software without restriction, including without limitation the 7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 8 * sell copies of the Software, and to permit persons to whom the Software is 9 * furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 20 * IN THE SOFTWARE. 21 */ 22 23 #ifndef JANET_VECTOR_H_defined 24 #define JANET_VECTOR_H_defined 25 26 #ifndef JANET_AMALG 27 #include "features.h" 28 #include <janet.h> 29 #endif 30 31 /* 32 * vector code modified from 33 * https://github.com/nothings/stb/blob/master/stretchy_buffer.h 34 */ 35 36 /* This is mainly used code such as the assembler or compiler, which 37 * need vector like data structures that are only garbage collected in case 38 * of an error, and normally rely on malloc/free. */ 39 40 #define janet_v_free(v) (((v) != NULL) ? (janet_sfree(janet_v__raw(v)), 0) : 0) 41 #define janet_v_push(v, x) (janet_v__maybegrow(v, 1), (v)[janet_v__cnt(v)++] = (x)) 42 #define janet_v_pop(v) (janet_v_count(v) ? janet_v__cnt(v)-- : 0) 43 #define janet_v_count(v) (((v) != NULL) ? janet_v__cnt(v) : 0) 44 #define janet_v_last(v) ((v)[janet_v__cnt(v) - 1]) 45 #define janet_v_empty(v) (((v) != NULL) ? (janet_v__cnt(v) = 0) : 0) 46 #define janet_v_flatten(v) (janet_v_flattenmem((v), sizeof(*(v)))) 47 48 #define janet_v__raw(v) ((int32_t *)(v) - 2) 49 #define janet_v__cap(v) janet_v__raw(v)[0] 50 #define janet_v__cnt(v) janet_v__raw(v)[1] 51 52 #define janet_v__needgrow(v, n) ((v) == NULL || janet_v__cnt(v) + (n) >= janet_v__cap(v)) 53 #define janet_v__maybegrow(v, n) (janet_v__needgrow((v), (n)) ? janet_v__grow((v), (n)) : 0) 54 #define janet_v__grow(v, n) ((v) = janet_v_grow((v), (n), sizeof(*(v)))) 55 56 /* Actual functions defined in vector.c */ 57 void *janet_v_grow(void *v, int32_t increment, int32_t itemsize); 58 void *janet_v_flattenmem(void *v, int32_t itemsize); 59 60 #endif 61