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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "xml.h"
void
xmlparser_init(XMLParser *x) {
memset(x, 0, sizeof(XMLParser));
x->fp = stdin;
}
static int /* like getc(), but do some smart buffering */
xmlparser_getnext(XMLParser *x) {
if(x->readoffset >= x->readlastbytes) {
if(feof(x->fp))
return EOF;
x->readoffset = 0;
if(!(x->readlastbytes = fread(x->readbuf, 1, sizeof(x->readbuf), x->fp)))
return EOF; /* 0 bytes read, assume EOF */
}
return (int)x->readbuf[x->readoffset++];
}
static int
xmlparser_parsedata(XMLParser *x, int c) {
size_t datalen = 0;
if(x->xmldatastart)
x->xmldatastart(x);
do {
if(x->xmldataentity && c == '&') { /* TODO: test this, entity handler */
x->data[datalen] = '\0';
x->xmldata(x, x->data, datalen);
x->data[0] = c;
datalen = 1;
while((c = xmlparser_getnext(x)) != EOF) {
if(c == '<') { /* TODO: simplify? duplicate code. */
goto parsedataend;
/* x->data[datalen] = '\0';
if(x->xmldata)
x->xmldata(x, x->data, datalen);
if(x->xmldataend)
x->xmldataend(x);
return c;*/
}
if(datalen < sizeof(x->data) - 1)
x->data[datalen++] = c;
if(isspace(c))
break;
else if(c == ';') {
x->data[datalen] = '\0';
x->xmldataentity(x, x->data, datalen);
datalen = 0;
break;
}
}
} else if(c == '<') { /* TODO: simplify? duplicate code. */
parsedataend:
x->data[datalen] = '\0';
if(x->xmldata)
x->xmldata(x, x->data, datalen);
if(x->xmldataend)
x->xmldataend(x);
return c;
} else {
if(datalen < sizeof(x->data) - 1) {
x->data[datalen++] = c;
} else {
x->data[datalen] = '\0'; /* TODO: overflow */
if(x->xmldata)
x->xmldata(x, x->data, datalen);
x->data[0] = c;
datalen = 1;
}
}
} while((c = xmlparser_getnext(x)) != EOF);
return EOF;
}
static void
xmlparser_parseattrvalue(XMLParser *x, const char *name, size_t namelen, int end) {
size_t valuelen = 0;
int c;
if(x->xmlattrstart)
x->xmlattrstart(x, x->tag, x->taglen, name, namelen);
for(valuelen = 0; (c = xmlparser_getnext(x)) != EOF;) {
if(x->xmlattrentity && c == '&') { /* entities */
x->data[valuelen] = '\0';
/* call data function with data before entity if there is data */
if(x->xmlattr && valuelen)
x->xmlattr(x, x->tag, x->taglen, name, namelen, x->data, valuelen);
x->data[0] = c;
valuelen = 1;
while((c = xmlparser_getnext(x)) != EOF) {
if(c == end) { /* TODO: simplify? duplicate code. */
goto parseattrvalueend;
/* x->data[valuelen] = '\0';
if(x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, name, namelen, x->data, valuelen);
if(x->xmlattrend)
x->xmlattrend(x, x->tag, x->taglen, name, namelen);
return;*/
}
if(valuelen < sizeof(x->data) - 1)
x->data[valuelen++] = c;
else { /* TODO: entity too long? this should be very strange. */
x->data[valuelen] = '\0';
if(x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, name, namelen, x->data, valuelen);
valuelen = 0; /* TODO: incorrect ? ';' is read in c below? */
/* x->data[0] = '\0'; */
break;
}
if(c == ';') {
x->data[valuelen] = '\0';
x->xmlattrentity(x, x->tag, x->taglen, name, namelen, x->data, valuelen);
valuelen = 0; /* TODO: incorrect ? ';' is read in c below? */
break;
}
}
} else if(c == end) { /* TODO: simplify? duplicate code. */
parseattrvalueend:
x->data[valuelen] = '\0';
if(x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, name, namelen, x->data, valuelen);
if(x->xmlattrend)
x->xmlattrend(x, x->tag, x->taglen, name, namelen);
return;
} else {
if(valuelen < sizeof(x->data) - 1) { /* TODO: overflow */
x->data[valuelen++] = c;
} else {
x->data[valuelen] = '\0';
if(x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, name, namelen, x->data, valuelen);
x->data[0] = c;
valuelen = 1;
}
}
}
}
static int
xmlparser_parseattrs(XMLParser *x) {
char name[1024]; /* TODO: dont overflow this bitch, also make it bigger perhaps? */
size_t namelen = 0, valuelen = 0;
int c, shorttag = 0, endname = 0;
while((c = xmlparser_getnext(x)) != EOF) {
if(isspace(c) && namelen) /* Do nothing */
endname = 1;
if(isspace(c) || c == '?') { /* Do nothing */
} else if(c == '=') {
name[namelen] = '\0';
} else if(namelen && ((endname && isalpha(c)) || (c == '>' || c == '/'))) {
/* attribute without value */
name[namelen] = '\0';
if(x->xmlattrstart)
x->xmlattrstart(x, x->tag, x->taglen, name, namelen);
if(x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, name, namelen, "", 0);
if(x->xmlattrend)
x->xmlattrend(x, x->tag, x->taglen, name, namelen);
endname = 0;
name[0] = c;
namelen = 1;
} else if(namelen && (c == '\'' || c == '"')) {
/* attribute with value */
xmlparser_parseattrvalue(x, name, namelen, c);
namelen = 0;
valuelen = 0;
endname = 0;
} else if(namelen < sizeof(name) - 1)
name[namelen++] = c;
if(c == '>') {
break;
} else if(c == '/') { /* TODO: cleanup, ugly. */
shorttag = 1;
namelen = 0;
name[0] = '\0';
}
}
return shorttag; /* TODO: cleanup, ugly. */
}
static void
xmlparser_parsecomment(XMLParser *x) {
size_t datalen = 0, i = 0;
int c;
if(x->xmlcommentstart)
x->xmlcommentstart(x);
while((c = xmlparser_getnext(x)) != EOF) {
if(c == '-' && i < 2)
i++;
else if(c == '>') {
if(i == 2) { /* (!memcmp(cd, "-->", strlen("-->"))) { */
if(datalen >= 2)
datalen -= 2;
else
datalen = 0;
x->data[datalen] = '\0'; /* TODO: possible buffer underflow < 0 */
if(x->xmlcomment)
x->xmlcomment(x, x->data, datalen); /* TODO: possible buffer underflow < 0 */
if(x->xmlcommentend)
x->xmlcommentend(x);
break;
}
i = 0;
}
if(datalen < sizeof(x->data) - 1) { /* || (c == '-' && d >= sizeof(x->data) - 4)) { */ /* TODO: what if the end has --, and its cut on the boundary, test this. */
x->data[datalen++] = c;
} else {
x->data[datalen] = '\0'; /* TODO: overflow */
if(x->xmlcomment)
x->xmlcomment(x, x->data, datalen);
x->data[0] = c;
datalen = 1;
}
}
}
static void
xmlparser_parsecdata(XMLParser *x) {
size_t datalen = 0, i = 0;
int c;
if(x->xmlcdatastart)
x->xmlcdatastart(x);
while((c = xmlparser_getnext(x)) != EOF) {
if(c == ']' && i < 2) {
i++;
} else if(c == '>') {
if(i == 2) { /* (!memcmp(cd, "]]", strlen("]]"))) { */
if(datalen >= 2)
datalen -= 2;
else
datalen = 0;
x->data[datalen] = '\0'; /* TODO: check d >= 3 */ /* TODO: buffer underflow */
if(x->xmlcdata && datalen)
x->xmlcdata(x, x->data, datalen); /* TODO: buffer underflow */
if(x->xmlcdataend)
x->xmlcdataend(x);
break;
}
i = 0;
}
if(datalen < sizeof(x->data) - 1) { /* TODO: what if the end has ]>, and its cut on the boundary */
x->data[datalen++] = c;
} else {
x->data[datalen] = '\0';
if(x->xmlcdata)
x->xmlcdata(x, x->data, datalen);
x->data[0] = c;
datalen = 1;
}
}
}
static void
xmlparser_parsetag(XMLParser *x) {
size_t datalen, taglen;
int c, s, isshorttag = 0;
x->tag[0] = '\0';
x->taglen = 0;
while((c = xmlparser_getnext(x)) != EOF && isspace(c));
if(c == '!') {
for(datalen = 0; (c = xmlparser_getnext(x)) != EOF;) {
if(datalen <= strlen("[CDATA[")) /* if(d < sizeof(x->data)) */
x->data[datalen++] = c; /* TODO: prevent overflow */
if(c == '>')
break;
else if(c == '-' && !memcmp(x->data, "--", strlen("--"))) { /* comment */ /* TODO: optimize this bitch */
xmlparser_parsecomment(x);
break;
} else if(c == '[' && !memcmp(x->data, "[CDATA[", strlen("[CDATA["))) { /* cdata */ /* TODO: optimize this bitch */
xmlparser_parsecdata(x);
break;
}
}
} else if(c == '?') {
while((c = xmlparser_getnext(x)) != EOF) {
if(c == '"' || c == '\'') {
s = c;
while((c = xmlparser_getnext(x)) != EOF) {
if(c == s)
break;
}
} else if(c == '>')
break;
}
} else if(c != EOF && c != '>') {
x->tag[0] = c;
taglen = 1;
while((c = xmlparser_getnext(x)) != EOF) {
if(c == '/')
isshorttag = 1; /* short tag */
else if(isspace(c) || c == '>') {
x->tag[taglen] = '\0';
if(x->tag[0] == '/') { /* end tag */
x->taglen = --taglen; /* len -1 because of / */
if(x->xmltagend)
x->xmltagend(x, &(x->tag)[1], x->taglen, 0);
} else {
x->taglen = taglen;
if(x->xmltagstart)
x->xmltagstart(x, x->tag, x->taglen); /* start tag */
if(isspace(c) && xmlparser_parseattrs(x))
isshorttag = 1;
if(x->xmltagstartparsed)
x->xmltagstartparsed(x, x->tag, x->taglen, isshorttag);
}
if(isshorttag && x->xmltagend)
x->xmltagend(x, x->tag, x->taglen, 1);
break;
} else if(taglen < sizeof(x->tag) - 1)
x->tag[taglen++] = c; /* TODO: prevent overflow */
}
}
}
void
xmlparser_parse(XMLParser *x) {
int c;
while((c = xmlparser_getnext(x)) != EOF) {
/*if(isspace(c));*/ /* Do nothing */
/*else*/ if(c == '<') /* tag */
xmlparser_parsetag(x);
else {
xmlparser_parsedata(x, c);
xmlparser_parsetag(x);
}
}
return;
}
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