/* html.c: helper functions for html output
 *
 * Copyright (C) 2006 Lars Hjemli
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>

int htmlfd = STDOUT_FILENO;

char *fmt(const char *format, ...)
{
	static char buf[8][1024];
	static int bufidx;
	int len;
	va_list args;

	bufidx++;
	bufidx &= 7;

	va_start(args, format);
	len = vsnprintf(buf[bufidx], sizeof(buf[bufidx]), format, args);
	va_end(args);
	if (len>sizeof(buf[bufidx])) {
		fprintf(stderr, "[html.c] string truncated: %s\n", format);
		exit(1);
	}
	return buf[bufidx];
}

void html_raw(const char *data, size_t size)
{
	write(htmlfd, data, size);
}

void html(const char *txt)
{
	write(htmlfd, txt, strlen(txt));
}

void htmlf(const char *format, ...)
{
	static char buf[65536];
	va_list args;

	va_start(args, format);
	vsnprintf(buf, sizeof(buf), format, args);
	va_end(args);
	html(buf);
}

void html_status(int code, const char *msg, int more_headers)
{
	htmlf("Status: %d %s\n", code, msg);
	if (!more_headers)
		html("\n");
}

void html_txt(char *txt)
{
	char *t = txt;
	while(t && *t){
		int c = *t;
		if (c=='<' || c=='>' || c=='&') {
			write(htmlfd, txt, t - txt);
			if (c=='>')
				html("&gt;");
			else if (c=='<')
				html("&lt;");
			else if (c=='&')
				html("&amp;");
			txt = t+1;
		}
		t++;
	}
	if (t!=txt)
		html(txt);
}

void html_ntxt(int len, char *txt)
{
	char *t = txt;
	while(t && *t && len--){
		int c = *t;
		if (c=='<' || c=='>' || c=='&') {
			write(htmlfd, txt, t - txt);
			if (c=='>')
				html("&gt;");
			else if (c=='<')
				html("&lt;");
			else if (c=='&')
				html("&amp;");
			txt = t+1;
		}
		t++;
	}
	if (t!=txt)
		write(htmlfd, txt, t - txt);
	if (len<0)
		html("...");
}

void html_attr(char *txt)
{
	char *t = txt;
	while(t && *t){
		int c = *t;
		if (c=='<' || c=='>' || c=='\'' || c=='\"') {
			write(htmlfd, txt, t - txt);
			if (c=='>')
				html("&gt;");
			else if (c=='<')
				html("&lt;");
			else if (c=='\'')
				html("&#x27;");
			else if (c=='"')
				html("&quot;");
			txt = t+1;
		}
		t++;
	}
	if (t!=txt)
		html(txt);
}

void html_url_path(char *txt)
{
	char *t = txt;
	while(t && *t){
		int c = *t;
		if (c=='"' || c=='#' || c=='\'' || c=='?') {
			write(htmlfd, txt, t - txt);
			write(htmlfd, fmt("%%%2x", c), 3);
			txt = t+1;
		}
		t++;
	}
	if (t!=txt)
		html(txt);
}

void html_url_arg(char *txt)
{
	char *t = txt;
	while(t && *t){
		int c = *t;
		if (c=='"' || c=='#' || c=='%' || c=='&' || c=='\'' || c=='+' || c=='?') {
			write(htmlfd, txt, t - txt);
			write(htmlfd, fmt("%%%2x", c), 3);
			txt = t+1;
		}
		t++;
	}
	if (t!=txt)
		html(txt);
}

void html_hidden(char *name, char *value)
{
	html("<input type='hidden' name='");
	html_attr(name);
	html("' value='");
	html_attr(value);
	html("'/>");
}

void html_option(char *value, char *text, char *selected_value)
{
	html("<option value='");
	html_attr(value);
	html("'");
	if (selected_value && !strcmp(selected_value, value))
		html(" selected='selected'");
	html(">");
	html_txt(text);
	html("</option>\n");
}

void html_link_open(char *url, char *title, char *class)
{
	html("<a href='");
	html_attr(url);
	if (title) {
		html("' title='");
		html_attr(title);
	}
	if (class) {
		html("' class='");
		html_attr(class);
	}
	html("'>");
}

void html_link_close(void)
{
	html("</a>");
}

void html_fileperm(unsigned short mode)
{
	htmlf("%c%c%c", (mode & 4 ? 'r' : '-'),
	      (mode & 2 ? 'w' : '-'), (mode & 1 ? 'x' : '-'));
}

int html_include(const char *filename)
{
	FILE *f;
	char buf[4096];
	size_t len;

	if (!(f = fopen(filename, "r"))) {
		fprintf(stderr, "[cgit] Failed to include file %s: %s (%d).\n",
			filename, strerror(errno), errno);
		returJune McEnroe &lt;june@causal.agency&gt;</td><td class='right'>2020-03-02 18:55:35 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/litterbox/commit/Makefile?h=1.1&amp;id=34daf56d67522d13375b1dca80d313955b85e7c2'>34daf56d67522d13375b1dca80d313955b85e7c2</a> (<a href='/litterbox/patch/Makefile?id=34daf56d67522d13375b1dca80d313955b85e7c2'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/litterbox/tree/?h=1.1&amp;id=34daf56d67522d13375b1dca80d313955b85e7c2'>5be656896c7fda0f15820411128ed83b85b1f0e7</a> /<a href='/litterbox/tree/Makefile?h=1.1&amp;id=34daf56d67522d13375b1dca80d313955b85e7c2'>Makefile</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/litterbox/commit/Makefile?h=1.1&amp;id=834fb3a3615c7546af0f35e8f0a0b31d923d7585'>Replace .mk files with configure script</a> (<a href='/litterbox/diff/Makefile?h=1.1&amp;id=34daf56d67522d13375b1dca80d313955b85e7c2&amp;id2=834fb3a3615c7546af0f35e8f0a0b31d923d7585'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='oid'><a href='/litterbox/snapshot/litterbox-34daf56d67522d13375b1dca80d313955b85e7c2.tar.gz'>li