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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "xml.h"
void
xmlparser_init(XMLParser *x, FILE *fp) {
memset(x, 0, sizeof(XMLParser));
x->fp = fp;
}
static __inline__ int /* like getc(), but do some smart buffering */
xmlparser_getnext(XMLParser *x) {
if(x->readoffset >= x->readlastbytes) {
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 __inline__ void
xmlparser_parseattrs(XMLParser *x) {
size_t namelen = 0, valuelen;
int c, endsep, endname = 0;
while((c = xmlparser_getnext(x)) != EOF) {
if(isspace(c)) { /* TODO: simplify endname ? */
if(namelen) /* do nothing */
endname = 1;
else
continue;
}
if(c == '?'); /* ignore */
else if(c == '=') {
x->name[namelen] = '\0';
} else if(namelen && ((endname && isalpha(c)) || (c == '>' || c == '/'))) {
/* attribute without value */
x->name[namelen] = '\0';
if(x->xmlattrstart)
x->xmlattrstart(x, x->tag, x->taglen, x->name, namelen);
if(x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, x->name, namelen, "", 0);
if(x->xmlattrend)
x->xmlattrend(x, x->tag, x->taglen, x->name, namelen);
endname = 0;
x->name[0] = c;
namelen = 1;
} else if(namelen && (c == '\'' || c == '"')) {
/* attribute with value */
endsep = c; /* c is end separator */
if(x->xmlattrstart)
x->xmlattrstart(x, x->tag, x->taglen, x->name, namelen);
for(valuelen = 0; (c = xmlparser_getnext(x)) != EOF;) {
if(c == '&' && x->xmlattrentity) { /* entities */
x->data[valuelen] = '\0';
/* call data function with data before entity if there is data */
if(valuelen && x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, x->name, namelen, x->data, valuelen);
x->data[0] = c;
valuelen = 1;
while((c = xmlparser_getnext(x)) != EOF) {
if(c == endsep)
break;
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, x->name, namelen, x->data, valuelen);
valuelen = 0;
break;
}
if(c == ';') {
x->data[valuelen] = '\0';
x->xmlattrentity(x, x->tag, x->taglen, x->name, namelen, x->data, valuelen);
valuelen = 0;
break;
}
}
} else if(c != endsep) {
if(valuelen < sizeof(x->data) - 1) {
x->data[valuelen++] = c;
} else {
x->data[valuelen] = '\0';
if(x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, x->name, namelen, x->data, valuelen);
x->data[0] = c;
valuelen = 1;
}
}
if(c == endsep) {
x->data[valuelen] = '\0';
if(x->xmlattr)
x->xmlattr(x, x->tag, x->taglen, x->name, namelen, x->data, valuelen);
if(x->xmlattrend)
x->xmlattrend(x, x->tag, x->taglen, x->name, namelen);
break;
}
}
namelen = 0;
endname = 0;
} else if(namelen < sizeof(x->name) - 1)
x->name[namelen++] = c;
if(c == '>') {
break;
} else if(c == '/') {
x->isshorttag = 1;
namelen = 0;
x->name[0] = '\0';
}
}
}
static __inline__ 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) { /* -- */
if(datalen >= 2) {
datalen -= 2;
x->data[datalen] = '\0';
if(x->xmlcomment)
x->xmlcomment(x, x->data, datalen);
}
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';
if(x->xmlcomment)
x->xmlcomment(x, x->data, datalen);
x->data[0] = c;
datalen = 1;
}
}
}
/* TODO:
* <test><![CDATA[1234567dddd8]]]>
*
* with x->data of sizeof(15) gives 2 ] at end of cdata, should be 1
* test comment function too for similar bug?
*
*/
static __inline__ 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) { /* ]] */
if(datalen >= 2) {
datalen -= 2;
x->data[datalen] = '\0';
if(x->xmlcdata && datalen)
x->xmlcdata(x, x->data, datalen);
}
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;
}
}
}
void
xmlparser_parse(XMLParser *x) {
int c, ispi;
size_t datalen, tagdatalen, taglen;
while((c = xmlparser_getnext(x)) != EOF && c != '<'); /* skip until < */
while(c != EOF) {
if(c == '<') { /* parse tag */
if((c = xmlparser_getnext(x)) == EOF)
return;
x->tag[0] = '\0';
x->taglen = 0;
if(c == '!') { /* cdata and comments */
for(tagdatalen = 0; (c = xmlparser_getnext(x)) != EOF;) {
if(tagdatalen <= strlen("[CDATA[")) /* if(d < sizeof(x->data)) */
x->data[tagdatalen++] = c; /* TODO: prevent overflow */
if(c == '>')
break;
else if(c == '-' && tagdatalen == strlen("--") &&
(x->data[0] == '-')) { /* comment */
xmlparser_parsecomment(x);
break;
} else if(c == '[') {
if(tagdatalen == strlen("[CDATA[") &&
x->data[1] == 'C' && x->data[2] == 'D' &&
x->data[3] == 'A' && x->data[4] == 'T' &&
x->data[5] == 'A' && x->data[6] == '[') { /* cdata */
xmlparser_parsecdata(x);
break;
} else {
/* markup declaration section */
while((c = xmlparser_getnext(x)) != EOF && c != ']');
}
}
}
} else { /* normal tag (open, short open, close), processing instruction. */
if(isspace(c))
while((c = xmlparser_getnext(x)) != EOF && isspace(c));
if(c == EOF)
return;
x->tag[0] = c;
ispi = (c == '?') ? 1 : 0;
x->isshorttag = ispi;
taglen = 1;
while((c = xmlparser_getnext(x)) != EOF) {
if(c == '/') /* TODO: simplify short tag? */
x->isshorttag = 1; /* short tag */
else if(c == '>' || isspace(c)) {
x->tag[taglen] = '\0';
if(x->tag[0] == '/') { /* end tag, starts with </ */
x->taglen = --taglen; /* len -1 because of / */
if(taglen && 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);
if(x->xmltagstartparsed)
x->xmltagstartparsed(x, x->tag, x->taglen, x->isshorttag);
}
if((x->isshorttag || ispi) && x->xmltagend) /* call tagend for shortform or processing instruction */
x->xmltagend(x, x->tag, x->taglen, 1);
break;
} else if(taglen < sizeof(x->tag) - 1)
x->tag[taglen++] = c;
}
}
} else { /* parse data */
datalen = 0;
if(x->xmldatastart)
x->xmldatastart(x);
while((c = xmlparser_getnext(x)) != EOF) {
if(c == '&' && x->xmldataentity) {
if(datalen) {
x->data[datalen] = '\0';
x->xmldata(x, x->data, datalen);
}
x->data[0] = c;
datalen = 1;
while((c = xmlparser_getnext(x)) != EOF) {
if(c == '<')
break;
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 != '<') {
if(datalen < sizeof(x->data) - 1) {
x->data[datalen++] = c;
} else {
x->data[datalen] = '\0';
if(x->xmldata)
x->xmldata(x, x->data, datalen);
x->data[0] = c;
datalen = 1;
}
}
if(c == '<') {
x->data[datalen] = '\0';
if(x->xmldata && datalen)
x->xmldata(x, x->data, datalen);
if(x->xmldataend)
x->xmldataend(x);
break;
}
}
}
}
}
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