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cgitsb/html.c
John Keeping 438bac6f57 html: avoid using a plain integer as a NULL pointer 
Sparse complains about this table because we use the integer zero as the
NULL pointer.  Use this as an opportunity to reformat the table so that
it always contains 8 elements per row, making it easier to see which
values are being set and which are not.

Signed-off-by: John Keeping <john@keeping.me.uk>
2015-03-09 17:41:14 +01:00

388 lignes
8.0 KiB
C
Brut Annotations Historique

/* html.c: helper functions for html output
*
* Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
#include "html.h"
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
/* Percent-encoding of each character, except: a-zA-Z0-9!$()*,./:;@- */
static const char* url_escape_table[256] = {
"%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07",
"%08", "%09", "%0a", "%0b", "%0c", "%0d", "%0e", "%0f",
"%10", "%11", "%12", "%13", "%14", "%15", "%16", "%17",
"%18", "%19", "%1a", "%1b", "%1c", "%1d", "%1e", "%1f",
"%20", NULL, "%22", "%23", NULL, "%25", "%26", "%27",
NULL, NULL, NULL, "%2b", NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, "%3c", "%3d", "%3e", "%3f",
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, "%5c", NULL, "%5e", NULL,
"%60", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, "%7b", "%7c", "%7d", NULL, "%7f",
"%80", "%81", "%82", "%83", "%84", "%85", "%86", "%87",
"%88", "%89", "%8a", "%8b", "%8c", "%8d", "%8e", "%8f",
"%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97",
"%98", "%99", "%9a", "%9b", "%9c", "%9d", "%9e", "%9f",
"%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7",
"%a8", "%a9", "%aa", "%ab", "%ac", "%ad", "%ae", "%af",
"%b0", "%b1", "%b2", "%b3", "%b4", "%b5", "%b6", "%b7",
"%b8", "%b9", "%ba", "%bb", "%bc", "%bd", "%be", "%bf",
"%c0", "%c1", "%c2", "%c3", "%c4", "%c5", "%c6", "%c7",
"%c8", "%c9", "%ca", "%cb", "%cc", "%cd", "%ce", "%cf",
"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
"%d8", "%d9", "%da", "%db", "%dc", "%dd", "%de", "%df",
"%e0", "%e1", "%e2", "%e3", "%e4", "%e5", "%e6", "%e7",
"%e8", "%e9", "%ea", "%eb", "%ec", "%ed", "%ee", "%ef",
"%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7",
"%f8", "%f9", "%fa", "%fb", "%fc", "%fd", "%fe", "%ff"
};
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];
}
char *fmtalloc(const char *format, ...)
{
struct strbuf sb = STRBUF_INIT;
va_list args;
va_start(args, format);
strbuf_vaddf(&sb, format, args);
va_end(args);
return strbuf_detach(&sb, NULL);
}
void html_raw(const char *data, size_t size)
{
if (write(STDOUT_FILENO, data, size) != size)
die_errno("write error on html output");
}
void html(const char *txt)
{
html_raw(txt, strlen(txt));
}
void htmlf(const char *format, ...)
{
va_list args;
struct strbuf buf = STRBUF_INIT;
va_start(args, format);
strbuf_vaddf(&buf, format, args);
va_end(args);
html(buf.buf);
strbuf_release(&buf);
}
void html_txtf(const char *format, ...)
{
va_list args;
va_start(args, format);
html_vtxtf(format, args);
va_end(args);
}
void html_vtxtf(const char *format, va_list ap)
{
va_list cp;
struct strbuf buf = STRBUF_INIT;
va_copy(cp, ap);
strbuf_vaddf(&buf, format, cp);
va_end(cp);
html_txt(buf.buf);
strbuf_release(&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(const char *txt)
{
const char *t = txt;
while (t && *t) {
int c = *t;
if (c == '<' || c == '>' || c == '&') {
html_raw(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, const char *txt)
{
const char *t = txt;
while (t && *t && len--) {
int c = *t;
if (c == '<' || c == '>' || c == '&') {
html_raw(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_raw(txt, t - txt);
if (len < 0)
html("...");
}
void html_attrf(const char *fmt, ...)
{
va_list ap;
struct strbuf sb = STRBUF_INIT;
va_start(ap, fmt);
strbuf_vaddf(&sb, fmt, ap);
va_end(ap);
html_attr(sb.buf);
strbuf_release(&sb);
}
void html_attr(const char *txt)
{
const char *t = txt;
while (t && *t) {
int c = *t;
if (c == '<' || c == '>' || c == '\'' || c == '\"' || c == '&') {
html_raw(txt, t - txt);
if (c == '>')
html("&gt;");
else if (c == '<')
html("&lt;");
else if (c == '\'')
html("&#x27;");
else if (c == '"')
html("&quot;");
else if (c == '&')
html("&amp;");
txt = t + 1;
}
t++;
}
if (t != txt)
html(txt);
}
void html_url_path(const char *txt)
{
const char *t = txt;
while (t && *t) {
unsigned char c = *t;
const char *e = url_escape_table[c];
if (e && c != '+' && c != '&') {
html_raw(txt, t - txt);
html(e);
txt = t + 1;
}
t++;
}
if (t != txt)
html(txt);
}
void html_url_arg(const char *txt)
{
const char *t = txt;
while (t && *t) {
unsigned char c = *t;
const char *e = url_escape_table[c];
if (c == ' ')
e = "+";
if (e) {
html_raw(txt, t - txt);
html(e);
txt = t + 1;
}
t++;
}
if (t != txt)
html(txt);
}
void html_hidden(const char *name, const char *value)
{
html("<input type='hidden' name='");
html_attr(name);
html("' value='");
html_attr(value);
html("'/>");
}
void html_option(const char *value, const char *text, const 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_intoption(int value, const char *text, int selected_value)
{
htmlf("<option value='%d'%s>", value,
value == selected_value ? " selected='selected'" : "");
html_txt(text);
html("</option>");
}
void html_link_open(const char *url, const char *title, const 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)
html_raw(buf, len);
fclose(f);
return 0;
}
static 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;
}
static char *convert_query_hexchar(char *txt)
{
int d1, d2, n;
n = strlen(txt);
if (n < 3) {
*txt = '\0';
return txt-1;
}
d1 = hextoint(*(txt + 1));
d2 = hextoint(*(txt + 2));
if (d1 < 0 || d2 < 0) {
memmove(txt, txt + 3, n - 2);
return txt-1;
} else {
*txt = d1 * 16 + d2;
memmove(txt + 1, txt + 3, n - 2);
return txt;
}
}
int http_parse_querystring(const char *txt_, void (*fn)(const char *name, const char *value))
{
char *o, *t, *txt, *value = NULL, c;
if (!txt_)
return 0;
o = t = txt = xstrdup(txt_);
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);
free(o);
return 0;
}
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