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#include <stdlib.h>
#include <string.h>
#include "xstring.h"
string *string_alloc(string *str, const char *text)
{
return string_nalloc(str, text,
(text) ? strlen(text) : INIT_LEN_STRING);
}
string *string_nalloc(string *str, const char *text, size_t text_len)
{
if(!str) {
str = malloc(sizeof(string));
str->s = malloc(sizeof(char) * (text_len + 1));
str->capacity = text_len;
}
else {
if(text_len >= str->capacity) {
free(str->s);
str->s = malloc(sizeof(char) * (text_len + 1));
str->capacity = text_len;
}
}
if(text) {
strncpy(str->s, text, text_len);
str->len = text_len;
}
else
str->len = 0;
str->s[str->len] = '\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;
}
}
static void string_realloc(string *str, int cap)
{
int i;
char *tmp_s = str->s;
str->s = malloc(sizeof(char) * (cap + 1));
for(i = 0; i < cap; i++)
str->s[i] = (i >= str->len) ? '\0' : tmp_s[i];
str->capacity = cap;
free(tmp_s);
}
void string_addch(string *str, int ch)
{
if((str->len + 1) >= str->capacity)
string_realloc(str, str->capacity + INIT_LEN_STRING);
str->s[str->len] = ch;
str->len++;
str->s[str->len] = '\0';
}
void string_addstr(string *str, const char *src, size_t src_len)
{
if((str->len + src_len) >= str->capacity)
string_realloc(str, str->capacity + src_len);
while(src_len > 0 && (str->s[str->len] = *src++)) {
src_len--;
str->len++;
}
str->s[str->len] = '\0';
}
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