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/*
* (c) 2020 Vincenzo "KatolaZ" Nicosia <katolaz@freaknet.org>
*
* A simple xml-to-tsv converter, based on xmlparser by Hiltjo Posthuma
* http://codemadness.org/git/xmlparser/
*
* You can use, distribute, modify, and/or redistribute this program under
* the terms of the ISC LICENSE. See LICENSE for details.
*
*/
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include "xml.h"
#include "config.h"
/* tag stack */
typedef struct {
int top;
char st[DEPTH_MAX][STR_MAX];
} tstack_t;
int stack_push(tstack_t *t, const char *c){
if (t->top < DEPTH_MAX){
t->top ++;
strncpy(t->st[t->top], c, STR_MAX - 1);
t->st[t->top][STR_MAX - 1] = '\0';
return 0;
}
return -1;
}
char* stack_pop(tstack_t *t){
if (t->top >= 0)
return t->st[t->top--];
return NULL;
}
char* stack_peek(tstack_t *t){
if (t->top >= 0)
return t->st[t->top];
return NULL;
}
int stack_empty(tstack_t *t){
return (t->top < 0);
}
void stack_init(tstack_t *t){
t->top = -1;
}
/* utility functions */
void print_no_cr(FILE *f, const char *s){
const char *tmp = s;
size_t len;
while (*tmp != '\0'){
len = strcspn(tmp, "\n\t");
fwrite(tmp, 1, len, f);
tmp += len;
if (*tmp == '\n'){
if (len > 0){
fprintf(f, "\\n");
}
tmp ++;
}
else if (*tmp == '\t'){
fprintf(f, "\\t");
tmp ++;
}
}
}
void print_cur_str(FILE *f, tstack_t *t){
int i;
for (i=0; i<=t->top; i++){
fprintf(f, "/%s", t->st[i]);
}
}
/* global variables */
tstack_t st;
/* xml callbacks */
void
xmlattr(XMLParser *x, const char *t, size_t tl, const char *a, size_t al,
const char *v, size_t vl)
{
printf("%s", v);
}
void
xmlattrentity(XMLParser *x, const char *t, size_t tl, const char *a, size_t al,
const char *v, size_t vl)
{
static char buf[16];
int n;
if ((n = xml_entitytostr(v, buf, sizeof(buf))) > 0)
xmlattr(x, t, tl, a, al, buf, (size_t)n);
else
xmlattr(x, t, tl, a, al, v, vl);
}
void
xmlattrend(XMLParser *x, const char *t, size_t tl, const char *a, size_t al)
{
}
void
xmlattrstart(XMLParser *x, const char *t, size_t tl, const char *a, size_t al)
{
printf("%c%s%c", SEP, a, SATTR);
}
void
xmlcdatastart(XMLParser *x)
{
printf("%c", SEP);
}
void
xmlcdata(XMLParser *x, const char *d, size_t dl)
{
print_no_cr(stdout, d);
}
void
xmlcdataend(XMLParser *x)
{
}
void
xmlcommentstart(XMLParser *x)
{
}
void
xmlcomment(XMLParser *x, const char *c, size_t cl)
{
}
void
xmlcommentend(XMLParser *x)
{
}
void
xmldata(XMLParser *x, const char *d, size_t dl)
{
print_no_cr(stdout, d);
}
void
xmldataend(XMLParser *x)
{
}
void
xmldataentity(XMLParser *x, const char *d, size_t dl)
{
char buf[16];
int n;
if ((n = xml_entitytostr(d, buf, sizeof(buf))) > 0)
xmldata(x, buf, (size_t)n);
else
xmldata(x, d, dl);
}
void
xmldatastart(XMLParser *x)
{
printf("%c", SEP);
}
void
xmltagend(XMLParser *x, const char *t, size_t tl, int isshort)
{
char *tag;
if (stack_empty(&st)){
fprintf(stderr, "Error: tag-end '%s' before any open tag", t);
}
tag = stack_pop(&st);
if (strcmp(t, tag)){
fprintf(stderr, "Error: tag-end '%s' closes tag '%s'", t, tag);
}
if (isshort) {
printf("\n");
print_cur_str(stdout, &st);
}
}
void
xmltagstart(XMLParser *x, const char *t, size_t tl)
{
if (stack_push(&st, t)){
fprintf(stderr, "Error: stack full. Ignoring tag '%s' (parent tag: '%s')\n", t, stack_peek(&st));
return;
}
printf("\n");
print_cur_str(stdout, &st);
}
void
xmltagstartparsed(XMLParser *x, const char *t, size_t tl, int isshort)
{
/* printf("inside tagstartparsed\n"); */
}
int
main(void)
{
stack_init(&st);
XMLParser x = { 0 };
x.xmlattr = xmlattr;
x.xmlattrend = xmlattrend;
x.xmlattrstart = xmlattrstart;
x.xmlattrentity = xmlattrentity;
x.xmlcdatastart = xmlcdatastart;
x.xmlcdata = xmlcdata;
x.xmlcdataend = xmlcdataend;
x.xmlcommentstart = xmlcommentstart;
x.xmlcomment = xmlcomment;
x.xmlcommentend = xmlcommentend;
x.xmldata = xmldata;
x.xmldataend = xmldataend;
x.xmldataentity = xmldataentity;
x.xmldatastart = xmldatastart;
x.xmltagend = xmltagend;
x.xmltagstart = xmltagstart;
x.xmltagstartparsed = xmltagstartparsed;
x.getnext = getchar;
xml_parse(&x);
printf("\n");
return 0;
}
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