isspam/retoor_c/rstr.h

#ifndef RSTR_H
#define RSTR_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct str_t {
    char *content;
    size_t length;
    size_t buffer_size;
    size_t size;
} str_t;

str_t *strn(size_t buffer_size) {
    str_t *result = (str_t *)malloc(sizeof(str_t));
    result->length = 0;
    result->size = buffer_size;
    result->buffer_size = buffer_size;
    result->content = (char *)malloc(buffer_size);
    result->content[0] = 0;
    return result;
}
void stra(str_t *str, const char *to_append) {
    size_t required_new_length = str->length + strlen(to_append) + 1;
    str->length += strlen(to_append);
    if (required_new_length > str->size) {
        str->size += required_new_length + str->buffer_size;
        str->content = (char *)realloc(str->content, str->size + 1);
    }
    strcat(str->content, to_append);
    str->content[str->length] = 0;
}
void strac(str_t *str, const char c) {
    char to_append[] = {c, 0};
    stra(str, to_append);
}
void strd(str_t *str) {
    if (str->content) {
        free(str->content);
    }
    free(str);
}
char *strc(str_t *str) {
    char *content = str->content;
    str->content = NULL;
    strd(str);
    return content;
}

#endif