html.c

   1 /* html.c: helper functions for html output
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10
  11 char *fmt(const char *format, ...)
  12 {
  13         static char buf[8][1024];
  14         static int bufidx;
  15         int len;
  16         va_list args;
  17
  18         bufidx++;
  19         bufidx &= 7;
  20
  21         va_start(args, format);
  22         len = vsnprintf(buf[bufidx], sizeof(buf[bufidx]), format, args);
  23         va_end(args);
  24         if (len>sizeof(buf[bufidx]))
  25                 die("[html.c] string truncated: %s", format);
  26         return buf[bufidx];
  27 }
  28
  29 void html(const char *txt)
  30 {
  31         write(htmlfd, txt, strlen(txt));
  32 }
  33
  34 void htmlf(const char *format, ...)
  35 {
  36         static char buf[65536];
  37         va_list args;
  38
  39         va_start(args, format);
  40         vsnprintf(buf, sizeof(buf), format, args);
  41         va_end(args);
  42         html(buf);
  43 }
  44
  45 void html_txt(char *txt)
  46 {
  47         char *t = txt;
  48         while(t && *t){
  49                 int c = *t;
  50                 if (c=='<' || c=='>' || c=='&') {
  51                         *t = '\0';
  52                         html(txt);
  53                         *t = c;
  54                         if (c=='>')
  55                                 html("&gt;");
  56                         else if (c=='<')
  57                                 html("&lt;");
  58                         else if (c=='&')
  59                                 html("&amp;");
  60                         txt = t+1;
  61                 }
  62                 t++;
  63         }
  64         if (t!=txt)
  65                 html(txt);
  66 }
  67
  68 void html_ntxt(int len, char *txt)
  69 {
  70         char *t = txt;
  71         while(t && *t && len--){
  72                 int c = *t;
  73                 if (c=='<' || c=='>' || c=='&') {
  74                         *t = '\0';
  75                         html(txt);
  76                         *t = c;
  77                         if (c=='>')
  78                                 html("&gt;");
  79                         else if (c=='<')
  80                                 html("&lt;");
  81                         else if (c=='&')
  82                                 html("&amp;");
  83                         txt = t+1;
  84                 }
  85                 t++;
  86         }
  87         if (t!=txt) {
  88                 char c = *t;
  89                 *t = '\0';
  90                 html(txt);
  91                 *t = c;
  92         }
  93         if (len<0)
  94                 html("...");
  95 }
  96
  97 void html_attr(char *txt)
  98 {
  99         char *t = txt;
 100         while(t && *t){
 101                 int c = *t;
 102                 if (c=='<' || c=='>' || c=='\'') {
 103                         *t = '\0';
 104                         html(txt);
 105                         *t = c;
 106                         if (c=='>')
 107                                 html("&gt;");
 108                         else if (c=='<')
 109                                 html("&lt;");
 110                         else if (c=='\'')
 111                                 html("&quote;");
 112                         txt = t+1;
 113                 }
 114                 t++;
 115         }
 116         if (t!=txt)
 117                 html(txt);
 118 }
 119
 120 void html_hidden(char *name, char *value)
 121 {
 122         html("<input type='hidden' name='");
 123         html_attr(name);
 124         html("' value='");
 125         html_attr(value);
 126         html("'/>");
 127 }
 128
 129 void html_option(char *value, char *text, char *selected_value)
 130 {
 131         html("<option value='");
 132         html_attr(value);
 133         html("'");
 134         if (selected_value && !strcmp(selected_value, value))
 135                 html(" selected");
 136         html(">");
 137         html_txt(text);
 138         html("</option>\n");
 139 }
 140
 141 void html_link_open(char *url, char *title, char *class)
 142 {
 143         html("<a href='");
 144         html_attr(url);
 145         if (title) {
 146                 html("' title='");
 147                 html_attr(title);
 148         }
 149         if (class) {
 150                 html("' class='");
 151                 html_attr(class);
 152         }
 153         html("'>");
 154 }
 155
 156 void html_link_close(void)
 157 {
 158         html("</a>");
 159 }
 160
 161 void html_fileperm(unsigned short mode)
 162 {
 163         htmlf("%c%c%c", (mode & 4 ? 'r' : '-'),
 164               (mode & 2 ? 'w' : '-'), (mode & 1 ? 'x' : '-'));
 165 }
 166
 167 void html_filemode(unsigned short mode)
 168 {
 169         if (S_ISDIR(mode))
 170                 html("d");
 171         else if (S_ISLNK(mode))
 172                 html("l");
 173         else if (S_ISGITLINK(mode))
 174                 html("m");
 175         else
 176                 html("-");
 177         html_fileperm(mode >> 6);
 178         html_fileperm(mode >> 3);
 179         html_fileperm(mode);
 180 }
 181
 182 int html_include(const char *filename)
 183 {
 184         FILE *f;
 185         char buf[4096];
 186         size_t len;
 187
 188         if (!(f = fopen(filename, "r")))
 189                 return -1;
 190         while((len = fread(buf, 1, 4096, f)) > 0)
 191                 write(htmlfd, buf, len);
 192         fclose(f);
 193         return 0;
 194 }