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#include <stdlib.h>
#include <string.h>
#include "xstring.h"
string *string_alloc(const char *text)
{
string *str = malloc(sizeof(string));
if(text) {
int length = strlen(text);
str->s = malloc(sizeof(char) * (length + 1));
strcpy(str->s, text);
str->capacity = length;
str->len = length;
}
else {
str->s = malloc(sizeof(char) * (INIT_LEN_STRING + 1));
str->len = 0;
str->capacity = INIT_LEN_STRING;
str->s[0] = '\0';
}
return str;
}
void string_release(string *str)
{
if(str->s) {
free(str->s);
str->s = NULL;
}
free(str);
}
void string_reset(string *str)
{
if(str->s) {
str->s[0] = '\0';
str->len = 0;
}
}
void string_addch(string *str, int ch)
{
if(str->capacity <= (str->len + 1)) {
int i;
int updated_cap = str->capacity + INIT_LEN_STRING;
char *tmp_s = str->s;
str->s = malloc(sizeof(char) * (updated_cap + 1));
for(i = 0; i < updated_cap; i++)
str->s[i] = (i >= str->capacity) ? '\0' : tmp_s[i];
str->capacity = updated_cap;
free(tmp_s);
}
str->s[str->len] = ch;
str->len++;
str->s[str->len] = '\0';
}
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