diff options
Diffstat (limited to 'html.c')
| -rw-r--r-- | html.c | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/html.c b/html.c new file mode 100644 index 000000000000..7f81965fddcd --- /dev/null +++ b/html.c @@ -0,0 +1,344 @@ +/* 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 "url.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_txt(const char *txt) +{ + if (txt) + html_ntxt(txt, strlen(txt)); +} + +ssize_t html_ntxt(const char *txt, size_t len) +{ + const char *t = txt; + ssize_t slen; + + if (len > SSIZE_MAX) + return -1; + + slen = (ssize_t) len; + while (t && *t && slen--) { + int c = *t; + if (c == '<' || c == '>' || c == '&') { + html_raw(txt, t - txt); + if (c == '>') + html(">"); + else if (c == '<') + html("<"); + else if (c == '&') + html("&"); + txt = t + 1; + } + t++; + } + if (t != txt) + html_raw(txt, t - txt); + return slen; +} + +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(">"); + else if (c == '<') + html("<"); + else if (c == '\'') + html("'"); + else if (c == '"') + html("""); + else if (c == '&') + html("&"); + 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_header_arg_in_quotes(const char *txt) +{ + const char *t = txt; + while (t && *t) { + unsigned char c = *t; + const char *e = NULL; + if (c == '\\') + e = "\\\\"; + else if (c == '\r') + e = "\\r"; + else if (c == '\n') + e = "\\n"; + else 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; +} + +void http_parse_querystring(const char *txt, void (*fn)(const char *name, const char *value)) +{ + const char *t = txt; + + while (t && *t) { + char *name = url_decode_parameter_name(&t); + if (*name) { + char *value = url_decode_parameter_value(&t); + fn(name, value); + free(value); + } + free(name); + } +} |