1 files changed, 308 insertions, 0 deletions
diff --git a/libraries/hoedown/src/buffer.c b/libraries/hoedown/src/buffer.c
new file mode 100644
index 00000000..1c7ba55a
--- /dev/null
+++ b/libraries/hoedown/src/buffer.c
@@ -0,0 +1,308 @@
+#include "hoedown/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;
+}
+
+void
+hoedown_buffer_uninit(hoedown_buffer *buf)
+{
+	assert(buf && buf->unit);
+	buf->data_free(buf->data);
+}
+
+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;
+	assert(buf && buf->unit);
+
+	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 = (uint8_t *) 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;
+}
+
+int
+hoedown_buffer_putf(hoedown_buffer *buf, FILE *file)
+{
+	assert(buf && buf->unit);
+
+	while (!(feof(file) || ferror(file))) {
+		hoedown_buffer_grow(buf, buf->size + buf->unit);
+		buf->size += fread(buf->data + buf->size, 1, buf->unit, file);
+	}
+
+	return ferror(file);
+}
+
+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;
+
+	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;
+}
+
+void hoedown_buffer_put_utf8(hoedown_buffer *buf, unsigned int c) {
+	unsigned char unichar[4];
+
+	assert(buf && buf->unit);
+
+	if (c < 0x80) {
+		hoedown_buffer_putc(buf, c);
+	}
+	else if (c < 0x800) {
+		unichar[0] = 192 + (c / 64);
+		unichar[1] = 128 + (c % 64);
+		hoedown_buffer_put(buf, unichar, 2);
+	}
+	else if (c - 0xd800u < 0x800) {
+		HOEDOWN_BUFPUTSL(buf, "\xef\xbf\xbd");
+	}
+	else if (c < 0x10000) {
+		unichar[0] = 224 + (c / 4096);
+		unichar[1] = 128 + (c / 64) % 64;
+		unichar[2] = 128 + (c % 64);
+		hoedown_buffer_put(buf, unichar, 3);
+	}
+	else if (c < 0x110000) {
+		unichar[0] = 240 + (c / 262144);
+		unichar[1] = 128 + (c / 4096) % 64;
+		unichar[2] = 128 + (c / 64) % 64;
+		unichar[3] = 128 + (c % 64);
+		hoedown_buffer_put(buf, unichar, 4);
+	}
+	else {
+		HOEDOWN_BUFPUTSL(buf, "\xef\xbf\xbd");
+	}
+}