+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <string.h>
-
-#include "util.h"
-#include "xml.h"
-
-enum {
- STATE_NULL,
- STATE_TEXT,
- STATE_TAG,
- STATE_ATTRIBUTE,
-};
-
-static void inc_lines(unsigned *line, const char *s, size_t n) {
- const char *p = s;
-
- if (!line)
- return;
-
- for (;;) {
- const char *f;
-
- f = memchr(p, '\n', n);
- if (!f)
- return;
-
- n -= (f - p) + 1;
- p = f + 1;
- (*line)++;
- }
-}
-
-/* We don't actually do real XML here. We only read a simplistic
- * subset, that is a bit less strict that XML and lacks all the more
- * complex features, like entities, or namespaces. However, we do
- * support some HTML5-like simplifications */
-
-int xml_tokenize(const char **p, char **name, void **state, unsigned *line) {
- const char *c, *e, *b;
- char *ret;
- int t;
-
- assert(p);
- assert(*p);
- assert(name);
- assert(state);
-
- t = PTR_TO_INT(*state);
- c = *p;
-
- if (t == STATE_NULL) {
- if (line)
- *line = 1;
- t = STATE_TEXT;
- }
-
- for (;;) {
- if (*c == 0)
- return XML_END;
-
- switch (t) {
-
- case STATE_TEXT: {
- int x;
-
- e = strchrnul(c, '<');
- if (e > c) {
- /* More text... */
- ret = strndup(c, e - c);
- if (!ret)
- return -ENOMEM;
-
- inc_lines(line, c, e - c);
-
- *name = ret;
- *p = e;
- *state = INT_TO_PTR(STATE_TEXT);
-
- return XML_TEXT;
- }
-
- assert(*e == '<');
- b = c + 1;
-
- if (startswith(b, "!--")) {
- /* A comment */
- e = strstr(b + 3, "-->");
- if (!e)
- return -EINVAL;
-
- inc_lines(line, b, e + 3 - b);
-
- c = e + 3;
- continue;
- }
-
- if (*b == '?') {
- /* Processing instruction */
-
- e = strstr(b + 1, "?>");
- if (!e)
- return -EINVAL;
-
- inc_lines(line, b, e + 2 - b);
-
- c = e + 2;
- continue;
- }
-
- if (*b == '!') {
- /* DTD */
-
- e = strchr(b + 1, '>');
- if (!e)
- return -EINVAL;
-
- inc_lines(line, b, e + 1 - b);
-
- c = e + 1;
- continue;
- }
-
- if (*b == '/') {
- /* A closing tag */
- x = XML_TAG_CLOSE;
- b++;
- } else
- x = XML_TAG_OPEN;
-
- e = strpbrk(b, WHITESPACE "/>");
- if (!e)
- return -EINVAL;
-
- ret = strndup(b, e - b);
- if (!ret)
- return -ENOMEM;
-
- *name = ret;
- *p = e;
- *state = INT_TO_PTR(STATE_TAG);
-
- return x;
- }
-
- case STATE_TAG:
-
- b = c + strspn(c, WHITESPACE);
- if (*b == 0)
- return -EINVAL;
-
- inc_lines(line, c, b - c);
-
- e = b + strcspn(b, WHITESPACE "=/>");
- if (e > b) {
- /* An attribute */
-
- ret = strndup(b, e - b);
- if (!ret)
- return -ENOMEM;
-
- *name = ret;
- *p = e;
- *state = INT_TO_PTR(STATE_ATTRIBUTE);
-
- return XML_ATTRIBUTE_NAME;
- }
-
- if (startswith(b, "/>")) {
- /* An empty tag */
-
- *name = NULL; /* For empty tags we return a NULL name, the caller must be prepared for that */
- *p = b + 2;
- *state = INT_TO_PTR(STATE_TEXT);
-
- return XML_TAG_CLOSE_EMPTY;
- }
-
- if (*b != '>')
- return -EINVAL;
-
- c = b + 1;
- t = STATE_TEXT;
- continue;
-
- case STATE_ATTRIBUTE:
-
- if (*c == '=') {
- c++;
-
- if (*c == '\'' || *c == '\"') {
- /* Tag with a quoted value */
-
- e = strchr(c+1, *c);
- if (!e)
- return -EINVAL;
-
- inc_lines(line, c, e - c);
-
- ret = strndup(c+1, e - c - 1);
- if (!ret)
- return -ENOMEM;
-
- *name = ret;
- *p = e + 1;
- *state = INT_TO_PTR(STATE_TAG);
-
- return XML_ATTRIBUTE_VALUE;
-
- }
-
- /* Tag with a value without quotes */
-
- b = strpbrk(c, WHITESPACE ">");
- if (!b)
- b = c;
-
- ret = strndup(c, b - c);
- if (!ret)
- return -ENOMEM;
-
- *name = ret;
- *p = b;
- *state = INT_TO_PTR(STATE_TAG);
- return XML_ATTRIBUTE_VALUE;
- }
-
- t = STATE_TAG;
- continue;
- }
-
- }
-
- assert_not_reached("Bad state");
-}
~ianmdlvl / elogind.git / blobdiff