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#include "buffer.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
void *
hoedown_malloc(size_t size)
{
void *ret = malloc(size);
if (!ret) {
fprintf(stderr, "Allocation failed.\n");
abort();
}
return ret;
}
void *
hoedown_calloc(size_t nmemb, size_t size)
{
void *ret = calloc(nmemb, size);
if (!ret) {
fprintf(stderr, "Allocation failed.\n");
abort();
}
return ret;
}
void *
hoedown_realloc(void *ptr, size_t size)
{
void *ret = realloc(ptr, size);
if (!ret) {
fprintf(stderr, "Allocation failed.\n");
abort();
}
return ret;
}
void
hoedown_buffer_init(
hoedown_buffer *buf,
size_t unit,
hoedown_realloc_callback data_realloc,
hoedown_free_callback data_free,
hoedown_free_callback buffer_free)
{
assert(buf);
buf->data = NULL;
buf->size = buf->asize = 0;
buf->unit = unit;
buf->data_realloc = data_realloc;
buf->data_free = data_free;
buf->buffer_free = buffer_free;
}
hoedown_buffer *
hoedown_buffer_new(size_t unit)
{
hoedown_buffer *ret = hoedown_malloc(sizeof (hoedown_buffer));
hoedown_buffer_init(ret, unit, hoedown_realloc, free, free);
return ret;
}
void
hoedown_buffer_free(hoedown_buffer *buf)
{
if (!buf) return;
buf->data_free(buf->data);
if (buf->buffer_free)
buf->buffer_free(buf);
}
void
hoedown_buffer_reset(hoedown_buffer *buf)
{
assert(buf && buf->unit);
buf->data_free(buf->data);
buf->data = NULL;
buf->size = buf->asize = 0;
}
void
hoedown_buffer_grow(hoedown_buffer *buf, size_t neosz)
{
size_t neoasz;
assert(buf && buf->unit);
if (buf->asize >= neosz)
return;
neoasz = buf->asize + buf->unit;
while (neoasz < neosz)
neoasz += buf->unit;
buf->data = buf->data_realloc(buf->data, neoasz);
buf->asize = neoasz;
}
void
hoedown_buffer_put(hoedown_buffer *buf, const uint8_t *data, size_t size)
{
assert(buf && buf->unit);
if (buf->size + size > buf->asize)
hoedown_buffer_grow(buf, buf->size + size);
memcpy(buf->data + buf->size, data, size);
buf->size += size;
}
void
hoedown_buffer_puts(hoedown_buffer *buf, const char *str)
{
hoedown_buffer_put(buf, (const uint8_t *)str, strlen(str));
}
void
hoedown_buffer_putc(hoedown_buffer *buf, uint8_t c)
{
assert(buf && buf->unit);
if (buf->size >= buf->asize)
hoedown_buffer_grow(buf, buf->size + 1);
buf->data[buf->size] = c;
buf->size += 1;
}
void
hoedown_buffer_set(hoedown_buffer *buf, const uint8_t *data, size_t size)
{
assert(buf && buf->unit);
if (size > buf->asize)
hoedown_buffer_grow(buf, size);
memcpy(buf->data, data, size);
buf->size = size;
}
void
hoedown_buffer_sets(hoedown_buffer *buf, const char *str)
{
hoedown_buffer_set(buf, (const uint8_t *)str, strlen(str));
}
int
hoedown_buffer_eq(const hoedown_buffer *buf, const uint8_t *data, size_t size)
{
if (buf->size != size) return 0;
return memcmp(buf->data, data, size) == 0;
}
int
hoedown_buffer_eqs(const hoedown_buffer *buf, const char *str)
{
return hoedown_buffer_eq(buf, (const uint8_t *)str, strlen(str));
}
int
hoedown_buffer_prefix(const hoedown_buffer *buf, const char *prefix)
{
size_t i;
assert(buf && buf->unit);
for (i = 0; i < buf->size; ++i) {
if (prefix[i] == 0)
return 0;
if (buf->data[i] != prefix[i])
return buf->data[i] - prefix[i];
}
return 0;
}
void
hoedown_buffer_slurp(hoedown_buffer *buf, size_t size)
{
assert(buf && buf->unit);
if (size >= buf->size) {
buf->size = 0;
return;
}
buf->size -= size;
memmove(buf->data, buf->data + size, buf->size);
}
const char *
hoedown_buffer_cstr(hoedown_buffer *buf)
{
assert(buf && buf->unit);
if (buf->size < buf->asize && buf->data[buf->size] == 0)
return (char *)buf->data;
hoedown_buffer_grow(buf, buf->size + 1);
buf->data[buf->size] = 0;
return (char *)buf->data;
}
void
hoedown_buffer_printf(hoedown_buffer *buf, const char *fmt, ...)
{
va_list ap;
int n;
assert(buf && buf->unit);
if (buf->size >= buf->asize)
hoedown_buffer_grow(buf, buf->size + 1);
va_start(ap, fmt);
n = vsnprintf((char *)buf->data + buf->size, buf->asize - buf->size, fmt, ap);
va_end(ap);
if (n < 0) {
#ifndef _MSC_VER
return;
#else
va_start(ap, fmt);
n = _vscprintf(fmt, ap);
va_end(ap);
#endif
}
if ((size_t)n >= buf->asize - buf->size) {
hoedown_buffer_grow(buf, buf->size + n + 1);
va_start(ap, fmt);
n = vsnprintf((char *)buf->data + buf->size, buf->asize - buf->size, fmt, ap);
va_end(ap);
}
if (n < 0)
return;
buf->size += n;
}
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