/* 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=='\'') {			write(htmlfd, txt, t - txt);			if (c=='>')				html("&gt;");			else if (c=='<')				html("&lt;");			else if (c=='\'')				html("&quote;");			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);		return -1;	}	while((len = fread(buf, 1, 4096, f)) > 0)		write(htmlfd, buf, len);	fclose(f);	return 0;} int hextoint(char c){	if (c >= 'a' && c <= 'f')		return 10 + c - 'a';	else if (c >= 'A' && c <= 'F')		return 10 + c - 'A';	else if (c >= '0' && c <= '9')		return c - '0';	else		return -1;} char *convert_query_hexchar(char *txt){	int d1, d2;	if (strlen(txt) < 3) {		*txt = '\0';		return txt-1;	}	d1 = hextoint(*(txt+1));	d2 = hextoint(*(txt+2));	if (d1<0 || d2<0) {		strcpy(txt, txt+3);		return txt-1;	} else {		*txt = d1 * 16 + d2;		strcpy(txt+1, txt+3);		return txt;	}} int http_parse_querystring(char *txt, void (*fn)(const char *name, const char *value)){	char *t, *value = NULL, c; 	if (!txt)		return 0; 	t = txt = strdup(txt);	if (t == NULL) {		printf("Out of memory\n");		exit(1);	}	while((c=*t) != '\0') {		if (c=='=') {			*t = '\0';			value = t+1;		} else if (c=='+') {			*t = ' ';		} else if (c=='%') {			t = convert_query_hexchar(t);		} else if (c=='&') {			*t = '\0';			(*fn)(txt, value);			txt = t+1;			value = NULL;		}		t++;	}	if (t!=txt)		(*fn)(txt, value);	return 0;}