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/*
* hxnsxml - convert output of hxxmlns back to normal XML
*
* To do: handle quotes in Namespace URLs.
* To do: handle XML's own Namespace.
*
* Part of HTML-XML-utils, see:
* http://www.w3.org/Tools/HTML-XML-utils/
*
* Copyright © 1994-2010 World Wide Web Consortium
* See http://www.w3.org/Consortium/Legal/copyright-software
*
* Author: Bert Bos
* Created: 12 July 2010
*
**/
#include "config.h"
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <ctype.h>
#if STDC_HEADERS
# include <string.h>
#else
# ifndef HAVE_STRCHR
# define strchr index
# define strrchr rindex
# endif
#endif
#include <stdlib.h>
#include <assert.h>
#include <stdbool.h>
#include "export.h"
#include "types.e"
#include "html.e"
#include "scan.e"
#include "dict.e"
#include "openurl.e"
#include "errexit.e"
#define XML "{http://www.w3.org/XML/1998/namespace}"
static bool has_error = false;
static bool has_ns = false; /* true if Namespaces occur anywhere in document */
/* --------------- implements interface api.h -------------------------- */
/* handle_error -- called when a parse error occurred */
void handle_error(void *clientdata, const string s, int lineno)
{
fprintf(stderr, "%d: %s\n", lineno, s);
has_error = true;
}
/* start -- called before the first event is reported */
void* start(void)
{
return NULL;
}
/* end -- called after the last event is reported */
void end(void *clientdata)
{
/* skip */
}
/* handle_comment -- called after a comment is parsed */
void handle_comment(void *clientdata, string commenttext)
{
printf("<!--%s-->", commenttext);
}
/* handle_text -- called after a text chunk is parsed */
void handle_text(void *clientdata, string text)
{
printf("%s", text);
}
/* handle_decl -- called after a declaration is parsed */
void handle_decl(void *clientdata, string gi, string fpi,
string url)
{
printf("<!DOCTYPE %s", gi);
if (fpi) printf(" PUBLIC \"%s\"", fpi);
if (url) printf(" %s\"%s\"", fpi ? "" : "SYSTEM ", url);
printf(">\n");
}
/* handle_pi -- called after a PI is parsed */
void handle_pi(void *clientdata, string pi_text)
{
printf("<?%s>", pi_text);
}
/* print_attrs -- print attributes */
void print_attrs(const pairlist attribs)
{
pairlist p;
int i, j;
char c = 'a';
for (p = attribs; p; p = p->next) {
if (p->name[0] != '{') {
i = 0;
} else {
for (i = 1; p->name[i] && p->name[i] != '}'; i++);
if (p->name[i]) i++;
}
if (i > 2) {
if (c > 'z') {
fprintf(stderr, "Bug: hxnsxml cannot handle > 26 namespaces per element.\n");
exit(2);
}
printf(" xmlns:%c=\"", c);
for (j = 1; j < i - 1; j++) putchar(p->name[j]);
putchar('\"');
printf(" %c:", c);
c++;
} else {
printf(" ");
}
printf("%s=\"%s\"", p->name + i, p->value);
}
}
/* print_tag -- print "<" and the element name, optionally with a namespace */
static void print_tag(const conststring name)
{
int i, j;
if (name[0] != '{') {
i = 0;
} else {
for (i = 1; name[i] && name[i] != '}'; i++);
if (name[i]) i++;
}
printf("<%s", name + i);
if (i > 2) { /* Element has a Namespace */
printf(" xmlns=\"");
for (j = 1; j < i - 1; j++) putchar(name[j]);
putchar('"');
has_ns = true;
} else if (has_ns) { /* Document has Namespaces, this element not */
printf(" xmlns=\"\"");
}
}
/* handle_starttag -- called after a start tag is parsed */
void handle_starttag(void *clientdata, string name, pairlist attribs)
{
print_tag(name);
print_attrs(attribs);
putchar('>');
}
/* handle_emptytag -- called after an empty tag is parsed */
void handle_emptytag(void *clientdata, string name, pairlist attribs)
{
print_tag(name);
print_attrs(attribs);
printf(" />");
}
/* handle_endtag -- called after an endtag is parsed (name may be "") */
void handle_endtag(void *clientdata, string name)
{
int i;
if (name[0] != '{') {
i = 0;
} else {
for (i = 1; name[i] && name[i] != '}'; i++);
if (name[i]) i++;
}
printf("</%s>", name + i);
}
/* --------------------------------------------------------------------- */
/* usage -- print usage message and exit */
static void usage(string prog)
{
fprintf(stderr, "Version %s\nUsage: %s [file-or-url]\n", VERSION, prog);
exit(2);
}
int main(int argc, char *argv[])
{
int status = 200;
/* Bind the parser callback routines to our handlers */
set_error_handler(handle_error);
set_start_handler(start);
set_end_handler(end);
set_comment_handler(handle_comment);
set_text_handler(handle_text);
set_decl_handler(handle_decl);
set_pi_handler(handle_pi);
set_starttag_handler(handle_starttag);
set_emptytag_handler(handle_emptytag);
set_endtag_handler(handle_endtag);
if (argc > 2) usage(argv[0]);
else if (argc == 2) yyin = fopenurl(argv[1], "r", &status);
else yyin = stdin;
if (!yyin) {perror(argv[1]); exit(1);}
if (status != 200) errexit("%s : %s\n", argv[1], http_strerror(status));
if (yyparse() != 0) exit(3);
return has_error ? 1 : 0;
}
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