178 lines
3.0 KiB
C
178 lines
3.0 KiB
C
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#include "kvstore.h"
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// singleton
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kvs_array_t global_array = {0};
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int kvs_array_create(kvs_array_t *inst) {
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if (!inst) return -1;
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if (inst->table) {
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printf("table has alloc\n");
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return -1;
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}
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inst->table = kvs_malloc(KVS_ARRAY_SIZE * sizeof(kvs_array_item_t));
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if (!inst->table) {
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return -1;
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}
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inst->total = 0;
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return 0;
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}
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void kvs_array_destory(kvs_array_t *inst) {
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if (!inst) return ;
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if (inst->table) {
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kvs_free(inst->table);
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}
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}
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/*
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* @return: <0, error; =0, success; >0, exist
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*/
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int kvs_array_set(kvs_array_t *inst, char *key, char *value) {
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if (inst == NULL || key == NULL || value == NULL) return -1;
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if (inst->total == KVS_ARRAY_SIZE) return -1;
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char *str = kvs_array_get(inst, key);
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if (str) {
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return 1; //
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}
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char *kcopy = kvs_malloc(strlen(key) + 1);
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if (kcopy == NULL) return -2;
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memset(kcopy, 0, strlen(key) + 1);
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strncpy(kcopy, key, strlen(key));
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char *kvalue = kvs_malloc(strlen(value) + 1);
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if (kvalue == NULL) return -2;
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memset(kvalue, 0, strlen(value) + 1);
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strncpy(kvalue, value, strlen(value));
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int i = 0;
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for (i = 0;i < inst->total;i ++) {
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if (inst->table[i].key == NULL) {
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inst->table[i].key = kcopy;
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inst->table[i].value = kvalue;
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inst->total ++;
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return 0;
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}
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}
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if (i == inst->total && i < KVS_ARRAY_SIZE) {
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inst->table[i].key = kcopy;
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inst->table[i].value = kvalue;
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inst->total ++;
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}
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return 0;
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}
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char* kvs_array_get(kvs_array_t *inst, char *key) {
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if (inst == NULL || key == NULL) return NULL;
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int i = 0;
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for (i = 0;i < inst->total;i ++) {
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if (inst->table[i].key == NULL) {
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continue;
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}
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if (strcmp(inst->table[i].key, key) == 0) {
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return inst->table[i].value;
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}
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}
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return NULL;
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}
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/*
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* @return < 0, error; =0, success; >0, no exist
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*/
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int kvs_array_del(kvs_array_t *inst, char *key) {
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if (inst == NULL || key == NULL) return -1;
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int i = 0;
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for (i = 0;i < inst->total;i ++) {
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if (strcmp(inst->table[i].key, key) == 0) {
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kvs_free(inst->table[i].key);
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inst->table[i].key = NULL;
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kvs_free(inst->table[i].value);
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inst->table[i].value = NULL;
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return 0;
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}
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}
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return i;
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}
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/*
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* @return : < 0, error; =0, success; >0, no exist
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*/
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int kvs_array_mod(kvs_array_t *inst, char *key, char *value) {
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if (inst == NULL || key == NULL || value == NULL) return -1;
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int i = 0;
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for (i = 0;i < inst->total;i ++) {
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if (inst->table[i].key == NULL) {
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continue;
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}
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if (strcmp(inst->table[i].key, key) == 0) {
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kvs_free(inst->table[i].value);
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char *kvalue = kvs_malloc(strlen(value) + 1);
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if (kvalue == NULL) return -2;
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memset(kvalue, 0, strlen(value) + 1);
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strncpy(kvalue, value, strlen(value));
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inst->table[i].value = kvalue;
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return 0;
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}
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}
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return i;
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}
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/*
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* @return 0: exist, 1: no exist
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*/
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int kvs_array_exist(kvs_array_t *inst, char *key) {
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char *str = kvs_array_get(inst, key);
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if (!str) {
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return 1; //
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}
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return 0;
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}
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