112 lines
2.0 KiB
C
112 lines
2.0 KiB
C
#include "mystring.h"
|
|
|
|
#include <math.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
mcl_string *mcl_string_new(const char *text) {
|
|
if (!text) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Allocate string struct */
|
|
mcl_string *str = malloc(sizeof(mcl_string));
|
|
if (!str) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Calculate size and capacity */
|
|
str->size = strlen(text);
|
|
|
|
size_t capacity = (unsigned long)pow(2, (unsigned)log2(str->size) + 1);
|
|
str->capacity = capacity;
|
|
|
|
/* Allocate data buffer */
|
|
str->data = malloc(sizeof(char) * str->capacity);
|
|
if (!str->data) {
|
|
free(str);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Copy the text and ensure null termination */
|
|
memset(str->data, 0, str->capacity);
|
|
memcpy(str->data, text, str->size);
|
|
str->data[str->size] = '\0';
|
|
|
|
return str;
|
|
}
|
|
|
|
int mcl_string_append(mcl_string *string, const char *text) {
|
|
if (!string || !text) {
|
|
return -1;
|
|
}
|
|
|
|
/* Handle empty case */
|
|
size_t text_len = strlen(text);
|
|
if (text_len == 0) {
|
|
return 0;
|
|
}
|
|
|
|
size_t new_size = text_len + string->size;
|
|
|
|
/* Check if we need to resize */
|
|
if (new_size + 1 > string->capacity) {
|
|
size_t new_capacity = (unsigned long)pow(2, (unsigned)log2(new_size) + 1);
|
|
/* Reallocate the buffer */
|
|
void *new_data = realloc(string->data, sizeof(char) * new_capacity);
|
|
if (!new_data) {
|
|
return -1;
|
|
}
|
|
|
|
string->data = new_data;
|
|
string->capacity = new_capacity;
|
|
|
|
/* Init to 0 the new capacity */
|
|
memset(string->data + string->size, 0, string->capacity - string->size);
|
|
}
|
|
|
|
/* Append text */
|
|
memcpy(string->data + string->size, text, text_len);
|
|
string->size = new_size;
|
|
string->data[string->size] = '\0';
|
|
|
|
return 0;
|
|
}
|
|
|
|
void mcl_string_free(mcl_string *string) {
|
|
if (!string) {
|
|
return;
|
|
}
|
|
|
|
if (string->data) {
|
|
free(string->data);
|
|
}
|
|
|
|
free(string);
|
|
}
|
|
|
|
size_t mcl_string_length(const mcl_string *string) {
|
|
if (!string) {
|
|
return 0;
|
|
}
|
|
|
|
return string->size;
|
|
}
|
|
|
|
size_t mcl_string_capacity(const mcl_string *string) {
|
|
if (!string) {
|
|
return 0;
|
|
}
|
|
|
|
return string->capacity;
|
|
}
|
|
|
|
const char *mcl_string_cstr(const mcl_string *string) {
|
|
if (!string || !string->data) {
|
|
return "";
|
|
}
|
|
|
|
return string->data;
|
|
}
|