1 files changed, 0 insertions, 514 deletions
diff --git a/libs/libtxt/xml.c b/libs/libtxt/xml.c
deleted file mode 100644
index 9a5fd76..0000000
--- a/libs/libtxt/xml.c
+++ /dev/null
@@ -1,514 +0,0 @@
-// Inspired by sxml (capmar)
-// MIT License, Copyright (c) 2020 Marvin Borner
-
-#include <assert.h>
-#include <libtxt/xml.h>
-#include <mem.h>
-#include <str.h>
-
-static const char *str_findchr(const char *start, const char *end, int c)
-{
-	const char *it;
-
-	assert(start <= end);
-	assert(0 <= c && c <= 127);
-
-	it = (const char *)memchr((void *)start, c, end - start);
-	return (it != NULL) ? it : end;
-}
-
-static const char *str_findstr(const char *start, const char *end, const char *needle)
-{
-	u32 needlelen;
-	int first;
-	assert(start <= end);
-
-	needlelen = strlen(needle);
-	assert(0 < needlelen);
-	first = (u8)needle[0];
-
-	while (start + needlelen <= end) {
-		const char *it =
-			(const char *)memchr((void *)start, first, (end - start) - (needlelen - 1));
-		if (it == NULL)
-			break;
-
-		if (memcmp(it, needle, needlelen) == 0)
-			return it;
-
-		start = it + 1;
-	}
-
-	return end;
-}
-
-static int str_starts_with(const char *start, const char *end, const char *prefix)
-{
-	long nbytes;
-	assert(start <= end);
-
-	nbytes = strlen(prefix);
-	if (end - start < nbytes)
-		return 0;
-
-	return memcmp(prefix, start, nbytes) == 0;
-}
-
-static int white_space(int c)
-{
-	switch (c) {
-	case ' ':
-	case '\t':
-	case '\r':
-	case '\n':
-		return 1;
-	}
-
-	return 0;
-}
-
-static int name_start_char(int c)
-{
-	if (0x80 <= c)
-		return 1;
-
-	return c == ':' || ('A' <= c && c <= 'Z') || c == '_' || ('a' <= c && c <= 'z');
-}
-
-static int name_char(int c)
-{
-	return name_start_char(c) || c == '-' || c == '.' || ('0' <= c && c <= '9') || c == 0xB7 ||
-	       (0x0300 <= c && c <= 0x036F) || (0x203F <= c && c <= 0x2040);
-}
-
-#define is_space(c) (white_space(((u8)(c))))
-#define is_alpha(c) (name_start_char(((u8)(c))))
-#define is_alnum(c) (name_char(((u8)(c))))
-
-static const char *str_ltrim(const char *start, const char *end)
-{
-	const char *it;
-	assert(start <= end);
-
-	for (it = start; it != end && is_space(*it); it++)
-		;
-
-	return it;
-}
-
-static const char *str_rtrim(const char *start, const char *end)
-{
-	const char *it, *prev;
-	assert(start <= end);
-
-	for (it = end; start != it; it = prev) {
-		prev = it - 1;
-		if (!is_space(*prev))
-			return it;
-	}
-
-	return start;
-}
-
-static const char *str_find_notalnum(const char *start, const char *end)
-{
-	const char *it;
-	assert(start <= end);
-
-	for (it = start; it != end && is_alnum(*it); it++)
-		;
-
-	return it;
-}
-
-#define buffer_from_offset(args, i) ((args)->buffer + (i))
-#define buffer_tooffset(args, ptr) (unsigned)((ptr) - (args)->buffer)
-#define buffer_getend(args) ((args)->buffer + (args)->buffer_length)
-
-static int state_push_token(struct xml *state, struct xml_args *args, enum xml_type type,
-			    const char *start, const char *end)
-{
-	struct xml_token *token;
-	u32 i;
-	if (args->num_tokens <= state->ntokens)
-		return 0;
-
-	i = state->ntokens++;
-	token = &args->tokens[i];
-	token->type = type;
-	token->start_pos = buffer_tooffset(args, start);
-	token->end_pos = buffer_tooffset(args, end);
-	token->size = 0;
-
-	switch (type) {
-	case XML_START_TAG:
-		state->tag_level++;
-		break;
-
-	case XML_END_TAG:
-		assert(0 < state->tag_level);
-		state->tag_level--;
-		break;
-
-	default:
-		break;
-	}
-
-	return 1;
-}
-
-static enum xml_error state_set_pos(struct xml *state, const struct xml_args *args, const char *ptr)
-{
-	state->buffer_pos = buffer_tooffset(args, ptr);
-	return (state->ntokens <= args->num_tokens) ? XML_SUCCESS : XML_ERROR_TOKENSFULL;
-}
-
-#define state_commit(dest, src) memcpy((dest), (src), sizeof(struct xml))
-
-#define XML_ERROR_STRICT XML_ERROR_INVALID
-#define ENTITY_MAXLEN 8
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-
-static enum xml_error parse_characters(struct xml *state, struct xml_args *args, const char *end)
-{
-	const char *start = buffer_from_offset(args, state->buffer_pos);
-	const char *limit, *colon, *ampr = str_findchr(start, end, '&');
-	assert(end <= buffer_getend(args));
-
-	if (ampr != start)
-		state_push_token(state, args, XML_CHARACTER, start, ampr);
-
-	if (ampr == end)
-		return state_set_pos(state, args, ampr);
-
-	limit = MIN(ampr + ENTITY_MAXLEN, end);
-	colon = str_findchr(ampr, limit, ';');
-	if (colon == limit)
-		return (limit == end) ? XML_ERROR_BUFFERDRY : XML_ERROR_INVALID;
-
-	start = colon + 1;
-	state_push_token(state, args, XML_CHARACTER, ampr, start);
-	return state_set_pos(state, args, start);
-}
-
-static enum xml_error parse_attrvalue(struct xml *state, struct xml_args *args, const char *end)
-{
-	while (buffer_from_offset(args, state->buffer_pos) != end) {
-		enum xml_error error = parse_characters(state, args, end);
-		if (error != XML_SUCCESS)
-			return error;
-	}
-
-	return XML_SUCCESS;
-}
-
-static enum xml_error parse_attributes(struct xml *state, struct xml_args *args)
-{
-	const char *start = buffer_from_offset(args, state->buffer_pos);
-	const char *end = buffer_getend(args);
-	const char *name = str_ltrim(start, end);
-
-	u32 ntokens = state->ntokens;
-	assert(0 < ntokens);
-
-	while (name != end && is_alpha(*name)) {
-		const char *eq, *space, *quot, *value;
-		enum xml_error error;
-
-		eq = str_findchr(name, end, '=');
-		if (eq == end)
-			return XML_ERROR_BUFFERDRY;
-
-		space = str_rtrim(name, eq);
-		state_push_token(state, args, XML_CDATA, name, space);
-
-		quot = str_ltrim(eq + 1, end);
-		if (quot == end)
-			return XML_ERROR_BUFFERDRY;
-		else if (*quot != '\'' && *quot != '"')
-			return XML_ERROR_INVALID;
-
-		value = quot + 1;
-		quot = str_findchr(value, end, *quot);
-		if (quot == end)
-			return XML_ERROR_BUFFERDRY;
-
-		state_set_pos(state, args, value);
-		error = parse_attrvalue(state, args, quot);
-		if (error != XML_SUCCESS)
-			return error;
-
-		name = str_ltrim(quot + 1, end);
-	}
-
-	{
-		struct xml_token *token = args->tokens + (ntokens - 1);
-		token->size = (u16)(state->ntokens - ntokens);
-	}
-
-	return state_set_pos(state, args, name);
-}
-
-#define TAG_LEN(str) (sizeof(str) - 1)
-#define TAG_MINSIZE 1
-
-static enum xml_error parse_comment(struct xml *state, struct xml_args *args)
-{
-	static const char START_TAG[] = "<!--";
-	static const char END_TAG[] = "-->";
-
-	const char *dash;
-	const char *start = buffer_from_offset(args, state->buffer_pos);
-	const char *end = buffer_getend(args);
-	if (end - start < (int)TAG_LEN(START_TAG))
-		return XML_ERROR_BUFFERDRY;
-
-	if (!str_starts_with(start, end, START_TAG))
-		return XML_ERROR_INVALID;
-
-	start += TAG_LEN(START_TAG);
-	dash = str_findstr(start, end, END_TAG);
-	if (dash == end)
-		return XML_ERROR_BUFFERDRY;
-
-	state_push_token(state, args, XML_COMMENT, start, dash);
-	return state_set_pos(state, args, dash + TAG_LEN(END_TAG));
-}
-
-static enum xml_error parse_instruction(struct xml *state, struct xml_args *args)
-{
-	static const char START_TAG[] = "<?";
-	static const char END_TAG[] = "?>";
-
-	enum xml_error error;
-	const char *quest, *space;
-	const char *start = buffer_from_offset(args, state->buffer_pos);
-	const char *end = buffer_getend(args);
-	assert(TAG_MINSIZE <= end - start);
-
-	if (!str_starts_with(start, end, START_TAG))
-		return XML_ERROR_INVALID;
-
-	start += TAG_LEN(START_TAG);
-	space = str_find_notalnum(start, end);
-	if (space == end)
-		return XML_ERROR_BUFFERDRY;
-
-	state_push_token(state, args, XML_INSTRUCTION, start, space);
-
-	state_set_pos(state, args, space);
-	error = parse_attributes(state, args);
-	if (error != XML_SUCCESS)
-		return error;
-
-	quest = buffer_from_offset(args, state->buffer_pos);
-	if (end - quest < (int)TAG_LEN(END_TAG))
-		return XML_ERROR_BUFFERDRY;
-
-	if (!str_starts_with(quest, end, END_TAG))
-		return XML_ERROR_INVALID;
-
-	return state_set_pos(state, args, quest + TAG_LEN(END_TAG));
-}
-
-static enum xml_error parse_doctype(struct xml *state, struct xml_args *args)
-{
-	static const char START_TAG[] = "<!DOCTYPE";
-	static const char END_TAG[] = ">";
-
-	const char *bracket;
-	const char *start = buffer_from_offset(args, state->buffer_pos);
-	const char *end = buffer_getend(args);
-	if (end - start < (int)TAG_LEN(START_TAG))
-		return XML_ERROR_BUFFERDRY;
-
-	if (!str_starts_with(start, end, START_TAG))
-		return XML_ERROR_BUFFERDRY;
-
-	start += TAG_LEN(START_TAG);
-	bracket = str_findstr(start, end, END_TAG);
-	if (bracket == end)
-		return XML_ERROR_BUFFERDRY;
-
-	state_push_token(state, args, XML_DOCTYPE, start, bracket);
-	return state_set_pos(state, args, bracket + TAG_LEN(END_TAG));
-}
-
-static enum xml_error parse_start(struct xml *state, struct xml_args *args)
-{
-	enum xml_error error;
-	const char *gt, *name, *space;
-	const char *start = buffer_from_offset(args, state->buffer_pos);
-	const char *end = buffer_getend(args);
-	assert(TAG_MINSIZE <= end - start);
-
-	if (!(start[0] == '<' && is_alpha(start[1])))
-		return XML_ERROR_INVALID;
-
-	name = start + 1;
-	space = str_find_notalnum(name, end);
-	if (space == end)
-		return XML_ERROR_BUFFERDRY;
-
-	state_push_token(state, args, XML_START_TAG, name, space);
-
-	state_set_pos(state, args, space);
-	error = parse_attributes(state, args);
-	if (error != XML_SUCCESS)
-		return error;
-
-	gt = buffer_from_offset(args, state->buffer_pos);
-
-	if (gt != end && *gt == '/') {
-		state_push_token(state, args, XML_END_TAG, name, space);
-		gt++;
-	}
-
-	if (gt == end)
-		return XML_ERROR_BUFFERDRY;
-
-	if (*gt != '>')
-		return XML_ERROR_INVALID;
-
-	return state_set_pos(state, args, gt + 1);
-}
-
-static enum xml_error parse_end(struct xml *state, struct xml_args *args)
-{
-	const char *gt, *space;
-	const char *start = buffer_from_offset(args, state->buffer_pos);
-	const char *end = buffer_getend(args);
-	assert(TAG_MINSIZE <= end - start);
-
-	if (!(str_starts_with(start, end, "</") && is_alpha(start[2])))
-		return XML_ERROR_INVALID;
-
-	start += 2;
-	gt = str_findchr(start, end, '>');
-	if (gt == end)
-		return XML_ERROR_BUFFERDRY;
-
-	space = str_find_notalnum(start, gt);
-	if (str_ltrim(space, gt) != gt)
-		return XML_ERROR_STRICT;
-
-	state_push_token(state, args, XML_END_TAG, start, space);
-	return state_set_pos(state, args, gt + 1);
-}
-
-static enum xml_error parse_cdata(struct xml *state, struct xml_args *args)
-{
-	static const char START_TAG[] = "<![CDATA[";
-	static const char END_TAG[] = "]]>";
-
-	const char *bracket;
-	const char *start = buffer_from_offset(args, state->buffer_pos);
-	const char *end = buffer_getend(args);
-	if (end - start < (int)TAG_LEN(START_TAG))
-		return XML_ERROR_BUFFERDRY;
-
-	if (!str_starts_with(start, end, START_TAG))
-		return XML_ERROR_INVALID;
-
-	start += TAG_LEN(START_TAG);
-	bracket = str_findstr(start, end, END_TAG);
-	if (bracket == end)
-		return XML_ERROR_BUFFERDRY;
-
-	state_push_token(state, args, XML_CDATA, start, bracket);
-	return state_set_pos(state, args, bracket + TAG_LEN(END_TAG));
-}
-
-void xml_init(struct xml *state)
-{
-	state->buffer_pos = 0;
-	state->ntokens = 0;
-	state->tag_level = 0;
-}
-
-#define ROOT_FOUND(state) (0 < (state)->tag_level)
-#define ROOT_PARSED(state) ((state)->tag_level == 0)
-
-enum xml_error xml_parse(struct xml *state, const char *buffer, u32 buffer_length,
-			 struct xml_token tokens[], u32 num_tokens)
-{
-	struct xml temp = *state;
-	const char *end = buffer + buffer_length;
-
-	struct xml_args args;
-	args.buffer = buffer;
-	args.buffer_length = buffer_length;
-	args.tokens = tokens;
-	args.num_tokens = num_tokens;
-
-	while (!ROOT_FOUND(&temp)) {
-		enum xml_error error;
-		const char *start = buffer_from_offset(&args, temp.buffer_pos);
-		const char *lt = str_ltrim(start, end);
-		state_set_pos(&temp, &args, lt);
-		state_commit(state, &temp);
-
-		if (end - lt < TAG_MINSIZE)
-			return XML_ERROR_BUFFERDRY;
-
-		if (*lt != '<')
-			return XML_ERROR_INVALID;
-
-		switch (lt[1]) {
-		case '?':
-			error = parse_instruction(&temp, &args);
-			break;
-		case '!':
-			error = (lt[2] == '-') ? parse_comment(&temp, &args) :
-						       parse_doctype(&temp, &args);
-			break;
-		default:
-			error = parse_start(&temp, &args);
-			break;
-		}
-
-		if (error != XML_SUCCESS)
-			return error;
-
-		state_commit(state, &temp);
-	}
-
-	while (!ROOT_PARSED(&temp)) {
-		enum xml_error error;
-		const char *start = buffer_from_offset(&args, temp.buffer_pos);
-		const char *lt = str_findchr(start, end, '<');
-		while (buffer_from_offset(&args, temp.buffer_pos) != lt) {
-			error = parse_characters(&temp, &args, lt);
-			if (error != XML_SUCCESS)
-				return error;
-
-			state_commit(state, &temp);
-		}
-
-		if (end - lt < TAG_MINSIZE)
-			return XML_ERROR_BUFFERDRY;
-
-		switch (lt[1]) {
-		case '?':
-			error = parse_instruction(&temp, &args);
-			break;
-		case '/':
-			error = parse_end(&temp, &args);
-			break;
-		case '!':
-			error = (lt[2] == '-') ? parse_comment(&temp, &args) :
-						       parse_cdata(&temp, &args);
-			break;
-		default:
-			error = parse_start(&temp, &args);
-			break;
-		}
-
-		if (error != XML_SUCCESS)
-			return error;
-
-		state_commit(state, &temp);
-	}
-
-	return XML_SUCCESS;
-}