simple-discuss/src/string_buffer.c

#include <stdlib.h>
#include "string_buffer.h"

/* TODO: better solution instead of abort */
void
sb_add_char(StringBuffer *buffer, char c)
{
    if (buffer->size == buffer->capacity) {
        buffer->capacity = 2 * buffer->capacity + 1;
        if (!(buffer->buf = realloc(buffer->buf, buffer->capacity))) {
            abort();
        }
    }
    buffer->buf[buffer->size++] = c;
}

void
sb_add_string(StringBuffer *buffer, const char *str)
{
    char c;
    while ((c = *(str++))) {
        sb_add_char(buffer, c);
    }
}

size_t
sb_length(const StringBuffer *buffer)
{
    return buffer->size;
}

void
sb_to_c_str(const StringBuffer *buffer, char *str)
{
    size_t i;
    for (i = 0; i < buffer->size; ++i) {
        str[i] = buffer->buf[i];
    }
    str[buffer->size] = '\0';
}

void
sb_init_empty(StringBuffer *buffer)
{
    buffer->buf = NULL;
    buffer->size = 0;
    buffer->capacity = 0;
}

void
sb_free(StringBuffer *buffer)
{
    if (buffer) free(buffer->buf);
}