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62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
7 years ago
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/*
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* grow.c: generic growing array implementation
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*/
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#include <syslog.h>
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#include "grow.h"
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#include "config.h"
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struct grow *grow_init(bool dealloc) {
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struct grow *g = malloc(sizeof(struct grow));
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if (g == NULL) {
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syslog(cfg_log_facility | LOG_ERR, "grow: Could not initialize growing array: %m");
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return NULL;
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}
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g -> arr = NULL;
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g -> elems = 0;
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g -> alloc = 0;
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g -> active_elems = 0;
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g -> dealloc = dealloc;
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return g;
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}
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bool grow_push (void *val, struct grow *g) {
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if (g -> alloc <= g -> elems) {
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uint64_t new_size = g -> alloc == 0? 1 : 2* (g -> alloc);
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void **new_arr = realloc(g -> arr, new_size * sizeof(void *));
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if (new_arr == NULL) {
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syslog(cfg_log_facility | LOG_ERR, "grow: could not resize growinging array: %m");
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return false;
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} else {
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g -> arr = new_arr;
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g -> alloc = new_size;
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}
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}
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g -> arr[g -> elems] = val;
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g -> elems++;
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g -> active_elems++;
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return true;
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}
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void *grow_pop (struct grow *g) {
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if (g -> elems == 0) {
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return NULL;
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} else {
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g -> elems--;
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g -> active_elems--;
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return g -> arr[g -> elems + 1];
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}
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}
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void grow_drop (struct grow *g) {
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if (g -> dealloc == true) {
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for(uint64_t i = 0; i < g -> elems; i++) {
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free(g->arr[i]);
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}
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}
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free(g -> arr);
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free(g);
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return;
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}
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