mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-11 09:34:09 +03:00
388 lines
7.4 KiB
C
388 lines
7.4 KiB
C
#include "fitz.h"
|
|
#include "muxps.h"
|
|
|
|
struct attribute
|
|
{
|
|
char name[40];
|
|
char *value;
|
|
struct attribute *next;
|
|
};
|
|
|
|
struct element
|
|
{
|
|
char name[40];
|
|
struct attribute *atts;
|
|
struct element *up, *down, *next;
|
|
};
|
|
|
|
struct parser
|
|
{
|
|
struct element *head;
|
|
};
|
|
|
|
static inline void indent(int n)
|
|
{
|
|
while (n--) putchar(' ');
|
|
}
|
|
|
|
void xml_print_element(struct element *item, int level)
|
|
{
|
|
while (item) {
|
|
struct attribute *att;
|
|
indent(level);
|
|
printf("<%s", item->name);
|
|
for (att = item->atts; att; att = att->next)
|
|
printf(" %s=\"%s\"", att->name, att->value);
|
|
if (item->down) {
|
|
printf(">\n");
|
|
xml_print_element(item->down, level + 1);
|
|
indent(level);
|
|
printf("</%s>\n", item->name);
|
|
}
|
|
else {
|
|
printf("/>\n");
|
|
}
|
|
item = item->next;
|
|
}
|
|
}
|
|
|
|
struct element *xml_next(struct element *item)
|
|
{
|
|
return item->next;
|
|
}
|
|
|
|
struct element *xml_down(struct element *item)
|
|
{
|
|
return item->down;
|
|
}
|
|
|
|
char *xml_tag(struct element *item)
|
|
{
|
|
return item->name;
|
|
}
|
|
|
|
char *xml_att(struct element *item, const char *name)
|
|
{
|
|
struct attribute *att;
|
|
for (att = item->atts; att; att = att->next)
|
|
if (!strcmp(att->name, name))
|
|
return att->value;
|
|
return NULL;
|
|
}
|
|
|
|
static void xml_free_attribute(struct attribute *att)
|
|
{
|
|
while (att) {
|
|
struct attribute *next = att->next;
|
|
if (att->value)
|
|
fz_free(att->value);
|
|
fz_free(att);
|
|
att = next;
|
|
}
|
|
}
|
|
|
|
void xml_free_element(struct element *item)
|
|
{
|
|
while (item) {
|
|
struct element *next = item->next;
|
|
if (item->atts)
|
|
xml_free_attribute(item->atts);
|
|
if (item->down)
|
|
xml_free_element(item->down);
|
|
fz_free(item);
|
|
item = next;
|
|
}
|
|
}
|
|
|
|
static int xml_parse_entity(int *c, char *a)
|
|
{
|
|
char *b;
|
|
if (a[1] == '#') {
|
|
if (a[2] == 'x')
|
|
*c = strtol(a + 3, &b, 16);
|
|
else
|
|
*c = strtol(a + 2, &b, 10);
|
|
if (*b == ';')
|
|
return b - a + 1;
|
|
}
|
|
else if (a[1] == 'l' && a[2] == 't' && a[3] == ';') {
|
|
*c = '<';
|
|
return 4;
|
|
}
|
|
else if (a[1] == 'g' && a[2] == 't' && a[3] == ';') {
|
|
*c = '>';
|
|
return 4;
|
|
}
|
|
else if (a[1] == 'a' && a[2] == 'm' && a[3] == 'p' && a[4] == ';') {
|
|
*c = '&';
|
|
return 5;
|
|
}
|
|
else if (a[1] == 'a' && a[2] == 'p' && a[3] == 'o' && a[4] == 's' && a[5] == ';') {
|
|
*c = '\'';
|
|
return 6;
|
|
}
|
|
else if (a[1] == 'q' && a[2] == 'u' && a[3] == 'o' && a[4] == 't' && a[5] == ';') {
|
|
*c = '"';
|
|
return 6;
|
|
}
|
|
*c = *a++;
|
|
return 1;
|
|
}
|
|
|
|
static void xml_emit_open_tag(struct parser *parser, char *a, char *b)
|
|
{
|
|
struct element *head, *tail;
|
|
|
|
head = fz_malloc(sizeof(struct element));
|
|
if (b - a > sizeof(head->name))
|
|
b = a + sizeof(head->name);
|
|
memcpy(head->name, a, b - a);
|
|
head->name[b - a] = 0;
|
|
|
|
head->atts = NULL;
|
|
head->up = parser->head;
|
|
head->down = NULL;
|
|
head->next = NULL;
|
|
|
|
if (!parser->head->down) {
|
|
parser->head->down = head;
|
|
}
|
|
else {
|
|
tail = parser->head->down;
|
|
while (tail->next)
|
|
tail = tail->next;
|
|
tail->next = head;
|
|
}
|
|
|
|
parser->head = head;
|
|
}
|
|
|
|
static void xml_emit_att_name(struct parser *parser, char *a, char *b)
|
|
{
|
|
struct element *head = parser->head;
|
|
struct attribute *att;
|
|
|
|
att = fz_malloc(sizeof(struct attribute));
|
|
if (b - a > sizeof(att->name))
|
|
b = a + sizeof(att->name);
|
|
memcpy(att->name, a, b - a);
|
|
att->name[b - a] = 0;
|
|
att->value = NULL;
|
|
att->next = head->atts;
|
|
head->atts = att;
|
|
}
|
|
|
|
static void xml_emit_att_value(struct parser *parser, char *a, char *b)
|
|
{
|
|
struct element *head = parser->head;
|
|
struct attribute *att = head->atts;
|
|
char *s;
|
|
int c;
|
|
|
|
/* entities are all longer than UTFmax so runetochar is safe */
|
|
s = att->value = fz_malloc(b - a + 1);
|
|
while (a < b) {
|
|
if (*a == '&') {
|
|
a += xml_parse_entity(&c, a);
|
|
s += runetochar(s, &c);
|
|
}
|
|
else {
|
|
*s++ = *a++;
|
|
}
|
|
}
|
|
*s = 0;
|
|
}
|
|
|
|
static void xml_emit_close_tag(struct parser *parser)
|
|
{
|
|
if (parser->head->up)
|
|
parser->head = parser->head->up;
|
|
}
|
|
|
|
static inline int isname(int c)
|
|
{
|
|
return c == '.' || c == '-' || c == '_' || c == ':' ||
|
|
(c >= '0' && c <= '9') ||
|
|
(c >= 'A' && c <= 'Z') ||
|
|
(c >= 'a' && c <= 'z');
|
|
}
|
|
|
|
static inline int iswhite(int c)
|
|
{
|
|
return c == ' ' || c == '\r' || c == '\n' || c == '\t';
|
|
}
|
|
|
|
static char *xml_parse_document_imp(struct parser *x, char *p)
|
|
{
|
|
char *mark;
|
|
int quote;
|
|
|
|
parse_text:
|
|
mark = p;
|
|
while (*p && *p != '<') ++p;
|
|
if (*p == '<') { ++p; goto parse_element; }
|
|
return NULL;
|
|
|
|
parse_element:
|
|
if (*p == '/') { ++p; goto parse_closing_element; }
|
|
if (*p == '!') { ++p; goto parse_comment; }
|
|
if (*p == '?') { ++p; goto parse_processing_instruction; }
|
|
while (iswhite(*p)) ++p;
|
|
if (isname(*p))
|
|
goto parse_element_name;
|
|
return "syntax error in element";
|
|
|
|
parse_comment:
|
|
if (*p == '[') goto parse_cdata;
|
|
if (*p++ != '-') return "syntax error in comment (<! not followed by --)";
|
|
if (*p++ != '-') return "syntax error in comment (<!- not followed by -)";
|
|
mark = p;
|
|
while (*p) {
|
|
if (p[0] == '-' && p[1] == '-' && p[2] == '>') {
|
|
p += 3;
|
|
goto parse_text;
|
|
}
|
|
++p;
|
|
}
|
|
return "end of data in comment";
|
|
|
|
parse_cdata:
|
|
if (p[1] != 'C' || p[2] != 'D' || p[3] != 'A' || p[4] != 'T' || p[5] != 'A' || p[6] != '[')
|
|
return "syntax error in CDATA section";
|
|
p += 7;
|
|
mark = p;
|
|
while (*p) {
|
|
if (p[0] == ']' && p[1] == ']' && p[2] == '>') {
|
|
p += 3;
|
|
goto parse_text;
|
|
}
|
|
++p;
|
|
}
|
|
return "end of data in CDATA section";
|
|
|
|
parse_processing_instruction:
|
|
while (*p) {
|
|
if (p[0] == '?' && p[1] == '>') {
|
|
p += 2;
|
|
goto parse_text;
|
|
}
|
|
++p;
|
|
}
|
|
return "end of data in processing instruction";
|
|
|
|
parse_closing_element:
|
|
while (iswhite(*p)) ++p;
|
|
mark = p;
|
|
while (isname(*p)) ++p;
|
|
while (iswhite(*p)) ++p;
|
|
if (*p != '>')
|
|
return "syntax error in closing element";
|
|
xml_emit_close_tag(x);
|
|
++p;
|
|
goto parse_text;
|
|
|
|
parse_element_name:
|
|
mark = p;
|
|
while (isname(*p)) ++p;
|
|
xml_emit_open_tag(x, mark, p);
|
|
if (*p == '>') { ++p; goto parse_text; }
|
|
if (p[0] == '/' && p[1] == '>') {
|
|
xml_emit_close_tag(x);
|
|
p += 2;
|
|
goto parse_text;
|
|
}
|
|
if (iswhite(*p))
|
|
goto parse_attributes;
|
|
return "syntax error after element name";
|
|
|
|
parse_attributes:
|
|
while (iswhite(*p)) ++p;
|
|
if (isname(*p))
|
|
goto parse_attribute_name;
|
|
if (*p == '>') { ++p; goto parse_text; }
|
|
if (p[0] == '/' && p[1] == '>') {
|
|
xml_emit_close_tag(x);
|
|
p += 2;
|
|
goto parse_text;
|
|
}
|
|
return "syntax error in attributes";
|
|
|
|
parse_attribute_name:
|
|
mark = p;
|
|
while (isname(*p)) ++p;
|
|
xml_emit_att_name(x, mark, p);
|
|
while (iswhite(*p)) ++p;
|
|
if (*p == '=') { ++p; goto parse_attribute_value; }
|
|
return "syntax error after attribute name";
|
|
|
|
parse_attribute_value:
|
|
while (iswhite(*p)) ++p;
|
|
quote = *p++;
|
|
if (quote != '"' && quote != '\'')
|
|
return "missing quote character";
|
|
mark = p;
|
|
while (*p && *p != quote) ++p;
|
|
if (*p == quote) {
|
|
xml_emit_att_value(x, mark, p++);
|
|
goto parse_attributes;
|
|
}
|
|
return "end of data in attribute value";
|
|
}
|
|
|
|
static char *convert_to_utf8(unsigned char *s, int n)
|
|
{
|
|
unsigned char *e = s + n;
|
|
char *dst, *d;
|
|
int c;
|
|
|
|
if (s[0] == 0xFE && s[1] == 0xFF) {
|
|
dst = d = fz_malloc(n * 2);
|
|
while (s + 1 < e) {
|
|
c = s[0] << 8 | s[1];
|
|
d += runetochar(d, &c);
|
|
s += 2;
|
|
}
|
|
*d = 0;
|
|
return dst;
|
|
}
|
|
|
|
if (s[0] == 0xFF && s[1] == 0xFE) {
|
|
dst = d = fz_malloc(n * 2);
|
|
while (s + 1 < e) {
|
|
c = s[0] | s[1] << 8;
|
|
d += runetochar(d, &c);
|
|
s += 2;
|
|
}
|
|
*d = 0;
|
|
return dst;
|
|
}
|
|
|
|
return (char*)s;
|
|
}
|
|
|
|
struct element *
|
|
xml_parse_document(unsigned char *s, int n)
|
|
{
|
|
struct parser parser;
|
|
struct element root;
|
|
char *p, *error;
|
|
|
|
/* s is already null-terminated (see xps_new_part) */
|
|
|
|
memset(&root, 0, sizeof(root));
|
|
parser.head = &root;
|
|
|
|
p = convert_to_utf8(s, n);
|
|
|
|
error = xml_parse_document_imp(&parser, p);
|
|
if (error) {
|
|
fz_throw(error);
|
|
return NULL;
|
|
}
|
|
|
|
if (p != (char*)s)
|
|
fz_free(p);
|
|
|
|
return root.down;
|
|
}
|