diff options
Diffstat (limited to 'l4darr/d1array.c')
-rw-r--r-- | l4darr/d1array.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/l4darr/d1array.c b/l4darr/d1array.c new file mode 100644 index 0000000..99d646f --- /dev/null +++ b/l4darr/d1array.c @@ -0,0 +1,110 @@ +#include <stdlib.h> +#include <string.h> +#include <l4darr.h> + +L4DA* l4da_create_setmax(int itemsize, int len, int maxlen){ + if(itemsize <= 0 || len < 0 || maxlen < len){ + return NULL; + } + L4DA* arr = (L4DA*)malloc(sizeof(L4DA)); + if(arr == NULL){ + return NULL; + } + arr->arr_itemsize = itemsize; + arr->arr_curlen = len; + arr->arr_maxlen = maxlen; + if(maxlen != 0){ + arr->arr_data = malloc(itemsize * maxlen); + if(arr->arr_data == NULL){ + free(arr); + return NULL; + } + }else{ + arr->arr_data = NULL; + } + return arr; +} + +L4DA* l4da_create(int itemsize, int len){ + return l4da_create_setmax(itemsize, len, len); +} + +void l4da_free(L4DA* arr){ + if(arr->arr_data != NULL){ + free(arr->arr_data); + } + free(arr); +} + +int l4da_pushback(L4DA* arr, void* data){ + if((arr->arr_maxlen) < (arr->arr_curlen + 1)){ + if(arr->arr_maxlen != 0){ + if(l4da_setmax(arr, arr->arr_maxlen*2) < 0){ + return -1; + } + }else{ + if(l4da_setmax(arr, 1) < 0){ + return -1; + } + } + } + memcpy(l4da_vp(arr, arr->arr_curlen), data, arr->arr_itemsize); + arr->arr_curlen++; + return 0; +} + +int l4da_setlen(L4DA* arr, int len){ + if(len > (arr->arr_maxlen)){ + if(l4da_setmax(arr, len) < 0){ + return -1; + }else{ + arr->arr_curlen = len; + } + }else{ + arr->arr_curlen = len; + return 0; + } + return 0; +} + +int l4da_setmax(L4DA* arr, int max){ + void* newptr; + if(arr->arr_data == NULL){ + newptr = malloc((arr->arr_itemsize)*max); + if(newptr == NULL){ + return -1; + }else{ + arr->arr_maxlen = max; + arr->arr_data = newptr; + return 0; + } + } + newptr = realloc(arr->arr_data, (arr->arr_itemsize)*max); + if(newptr == NULL){ + return -1; + }else{ + arr->arr_maxlen = max; + arr->arr_data = newptr; + } + return 0; +} + +int l4da_strip(L4DA* arr){ + if(arr->arr_data == NULL){ + return 0; + } + L4DA* newptr; + /* 其實縮小空間營該一定會成功才對...... + * 不過還是保險一點,加個判斷式,別說 memory leak 是我害的 + * 當然也是避免編譯器一直跳 warning + */ + if((arr->arr_maxlen) > (arr->arr_curlen)){ + arr->arr_maxlen = arr->arr_curlen; + newptr = realloc(arr->arr_data, (arr->arr_curlen)*(arr->arr_itemsize)); + if(newptr == NULL){ + return -1; + } + arr->arr_data = newptr; + } + return 0; +} |