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/* Copyright (c) 2006-2012 Jonas Fonseca <fonseca@diku.dk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef TIG_H
#define TIG_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifndef TIG_VERSION
#define TIG_VERSION "unknown-version"
#endif
#ifndef DEBUG
#define NDEBUG
#endif
/* necessary on Snow Leopard to use WINDOW struct */
#ifdef NCURSES_OPAQUE
#undef NCURSES_OPAQUE
#endif
#define NCURSES_OPAQUE 0
#include <assert.h>
#include <errno.h>
#include <ctype.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include <fcntl.h>
#include <regex.h>
#include <locale.h>
#include <langinfo.h>
#include <iconv.h>
/* ncurses(3): Must be defined to have extended wide-character functions. */
#define _XOPEN_SOURCE_EXTENDED
#ifdef HAVE_NCURSESW_H
#include <ncursesw/ncurses.h>
#else
#include <ncurses.h>
#endif
#if __GNUC__ >= 3
#define __NORETURN __attribute__((__noreturn__))
#define PRINTF_LIKE(fmt, args) __attribute__((format (printf, fmt, args)))
#else
#define __NORETURN
#define PRINTF_LIKE(fmt, args)
#endif
#define ABS(x) ((x) >= 0 ? (x) : -(x))
#define MIN(x, y) ((x) < (y) ? (x) : (y))
#define MAX(x, y) ((x) > (y) ? (x) : (y))
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#define STRING_SIZE(x) (sizeof(x) - 1)
#define SIZEOF_STR 1024 /* Default string size. */
#define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
#define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL. */
#define SIZEOF_ARG 32 /* Default argument array size. */
/* This color name can be used to refer to the default term colors. */
#define COLOR_DEFAULT (-1)
#define ENCODING_UTF8 "UTF-8"
#define ENCODING_SEP ": encoding: "
#define ENCODING_ARG "--encoding=" ENCODING_UTF8
#define ICONV_NONE ((iconv_t) -1)
#ifndef ICONV_CONST
#define ICONV_CONST /* nothing */
#endif
#define ICONV_TRANSLIT "//TRANSLIT"
/* The format and size of the date column in the main view. */
#define DATE_FORMAT "%Y-%m-%d %H:%M"
#define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
#define DATE_SHORT_COLS STRING_SIZE("2006-04-29 ")
#define ID_COLS 8
#define AUTHOR_COLS 19
#define FILENAME_COLS 19
#define MIN_VIEW_HEIGHT 4
#define NULL_ID "0000000000000000000000000000000000000000"
#define S_ISGITLINK(mode) (((mode) & S_IFMT) == 0160000)
/* Some ASCII-shorthands fitted into the ncurses namespace. */
#define KEY_CTL(x) ((x) & 0x1f) /* KEY_CTL(A) == ^A == \1 */
#define KEY_TAB '\t'
#define KEY_RETURN '\r'
#define KEY_ESC 27
/*
* Allocation helpers ... Entering macro hell to never be seen again.
*/
#define DEFINE_ALLOCATOR(name, type, chunk_size) \
static type * \
name(type **mem, size_t size, size_t increase) \
{ \
size_t num_chunks = (size + chunk_size - 1) / chunk_size; \
size_t num_chunks_new = (size + increase + chunk_size - 1) / chunk_size;\
type *tmp = *mem; \
\
if (mem == NULL || num_chunks != num_chunks_new) { \
size_t newsize = num_chunks_new * chunk_size * sizeof(type); \
\
tmp = realloc(tmp, newsize); \
if (tmp) { \
*mem = tmp; \
if (num_chunks_new > num_chunks) { \
size_t offset = num_chunks * chunk_size; \
size_t oldsize = offset * sizeof(type); \
\
memset(tmp + offset, 0, newsize - oldsize); \
} \
} \
} \
\
return tmp; \
}
/*
* Strings.
*/
#define prefixcmp(str1, str2) \
strncmp(str1, str2, STRING_SIZE(str2))
static inline bool
string_isnumber(const char *str)
{
int pos;
for (pos = 0; str[pos]; pos++) {
if (!isdigit(str[pos]))
return FALSE;
}
return pos > 0;
}
static inline bool
iscommit(char *str)
{
int pos;
for (pos = 0; str[pos]; pos++) {
if (!isxdigit(str[pos]))
return FALSE;
}
return 7 <= pos && pos < SIZEOF_REV;
}
static inline int
ascii_toupper(int c)
{
if (c >= 'a' && c <= 'z')
c &= ~0x20;
return c;
}
static inline int
ascii_tolower(int c)
{
if (c >= 'A' && c <= 'Z')
c |= 0x20;
return c;
}
static inline int
suffixcmp(const char *str, int slen, const char *suffix)
{
size_t len = slen >= 0 ? slen : strlen(str);
size_t suffixlen = strlen(suffix);
return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
}
static inline void
string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
{
if (srclen > dstlen - 1)
srclen = dstlen - 1;
strncpy(dst, src, srclen);
dst[srclen] = 0;
}
/* Shorthands for safely copying into a fixed buffer. */
#define FORMAT_BUFFER(buf, bufsize, fmt, retval, allow_truncate) \
do { \
va_list args; \
va_start(args, fmt); \
retval = vsnprintf(buf, bufsize, fmt, args); \
va_end(args); \
if (retval >= (bufsize) && allow_truncate) { \
(buf)[(bufsize) - 1] = 0; \
(buf)[(bufsize) - 2] = '.'; \
(buf)[(bufsize) - 3] = '.'; \
(buf)[(bufsize) - 4] = '.'; \
retval = (bufsize) - 1; \
} else if (retval < 0 || retval >= (bufsize)) { \
retval = -1; \
} \
} while (0)
#define string_copy(dst, src) \
string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
#define string_ncopy(dst, src, srclen) \
string_ncopy_do(dst, sizeof(dst), src, srclen)
static inline void
string_copy_rev(char *dst, const char *src)
{
size_t srclen;
for (srclen = 0; srclen < SIZEOF_REV; srclen++)
if (isspace(src[srclen]))
break;
string_ncopy_do(dst, SIZEOF_REV, src, srclen);
}
#define string_rev_is_null(rev) !strncmp(rev, NULL_ID, STRING_SIZE(NULL_ID))
#define string_add(dst, from, src) \
string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
static inline size_t
string_expanded_length(const char *src, size_t srclen, size_t tabsize, size_t max_size)
{
size_t size, pos;
for (size = pos = 0; pos < srclen && size < max_size; pos++) {
if (src[pos] == '\t') {
size_t expanded = tabsize - (size % tabsize);
size += expanded;
} else {
size++;
}
}
return pos;
}
static inline size_t
string_expand(char *dst, size_t dstlen, const char *src, int tabsize)
{
size_t size, pos;
for (size = pos = 0; size < dstlen - 1 && src[pos]; pos++) {
if (src[pos] == '\t') {
size_t expanded = tabsize - (size % tabsize);
if (expanded + size >= dstlen - 1)
expanded = dstlen - size - 1;
memcpy(dst + size, " ", expanded);
size += expanded;
} else {
dst[size++] = src[pos];
}
}
dst[size] = 0;
return pos;
}
static inline char *
chomp_string(char *name)
{
int namelen;
while (isspace(*name))
name++;
namelen = strlen(name) - 1;
while (namelen > 0 && isspace(name[namelen]))
name[namelen--] = 0;
return name;
}
static inline bool PRINTF_LIKE(4, 5)
string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
{
size_t pos = bufpos ? *bufpos : 0;
int retval;
FORMAT_BUFFER(buf + pos, bufsize - pos, fmt, retval, FALSE);
if (bufpos && retval > 0)
*bufpos = pos + retval;
return pos >= bufsize ? FALSE : TRUE;
}
#define string_format(buf, fmt, args...) \
string_nformat(buf, sizeof(buf), NULL, fmt, args)
#define string_format_from(buf, from, fmt, args...) \
string_nformat(buf, sizeof(buf), from, fmt, args)
static inline int
strcmp_null(const char *s1, const char *s2)
{
if (!s1 || !s2) {
return (!!s1) - (!!s2);
}
return strcmp(s1, s2);
}
/*
* Enumerations
*/
struct enum_map {
const char *name;
int namelen;
int value;
};
#define ENUM_MAP(name, value) { name, STRING_SIZE(name), value }
#define ENUM_SYM_MACRO(prefix, name) prefix##_##name
#define ENUM_MAP_MACRO(prefix, name) ENUM_MAP(#name, ENUM_SYM_MACRO(prefix, name))
#define DEFINE_ENUM(name, info) \
enum name { info(ENUM_SYM_MACRO) }; \
static const struct enum_map name##_map[] = { info(ENUM_MAP_MACRO) }
static inline int
string_enum_compare(const char *str1, const char *str2, int len)
{
size_t i;
#define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
/* Diff-Header == DIFF_HEADER */
for (i = 0; i < len; i++) {
if (ascii_toupper(str1[i]) == ascii_toupper(str2[i]))
continue;
if (string_enum_sep(str1[i]) &&
string_enum_sep(str2[i]))
continue;
return str1[i] - str2[i];
}
return 0;
}
#define enum_equals(entry, str, len) \
((entry).namelen == (len) && !string_enum_compare((entry).name, str, len))
static inline char *
enum_map_name(const char *name, size_t namelen)
{
static char buf[SIZEOF_STR];
int bufpos;
for (bufpos = 0; bufpos <= namelen; bufpos++) {
buf[bufpos] = ascii_tolower(name[bufpos]);
if (buf[bufpos] == '_')
buf[bufpos] = '-';
}
buf[bufpos] = 0;
return buf;
}
#define enum_name(entry) enum_map_name((entry).name, (entry).namelen)
static inline bool
map_enum_do(const struct enum_map *map, size_t map_size, int *value, const char *name)
{
size_t namelen = strlen(name);
int i;
for (i = 0; i < map_size; i++)
if (enum_equals(map[i], name, namelen)) {
*value = map[i].value;
return TRUE;
}
return FALSE;
}
#define map_enum(attr, map, name) \
map_enum_do(map, ARRAY_SIZE(map), attr, name)
/*
* Unicode / UTF-8 handling
*
* NOTE: Much of the following code for dealing with Unicode is derived from
* ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
* src/intl/charset.c from the UTF-8 branch commit elinks-0.11.0-g31f2c28.
*/
static inline int
unicode_width(unsigned long c, int tab_size)
{
if (c >= 0x1100 &&
(c <= 0x115f /* Hangul Jamo */
|| c == 0x2329
|| c == 0x232a
|| (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
/* CJK ... Yi */
|| (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
|| (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
|| (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
|| (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
|| (c >= 0xffe0 && c <= 0xffe6)
|| (c >= 0x20000 && c <= 0x2fffd)
|| (c >= 0x30000 && c <= 0x3fffd)))
return 2;
if (c == '\t')
return tab_size;
return 1;
}
/* Number of bytes used for encoding a UTF-8 character indexed by first byte.
* Illegal bytes are set one. */
static const unsigned char utf8_bytes[256] = {
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,
3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4, 5,5,5,5,6,6,1,1,
};
static inline unsigned char
utf8_char_length(const char *string, const char *end)
{
int c = *(unsigned char *) string;
return utf8_bytes[c];
}
/* Decode UTF-8 multi-byte representation into a Unicode character. */
static inline unsigned long
utf8_to_unicode(const char *string, size_t length)
{
unsigned long unicode;
switch (length) {
case 1:
unicode = string[0];
break;
case 2:
unicode = (string[0] & 0x1f) << 6;
unicode += (string[1] & 0x3f);
break;
case 3:
unicode = (string[0] & 0x0f) << 12;
unicode += ((string[1] & 0x3f) << 6);
unicode += (string[2] & 0x3f);
break;
case 4:
unicode = (string[0] & 0x0f) << 18;
unicode += ((string[1] & 0x3f) << 12);
unicode += ((string[2] & 0x3f) << 6);
unicode += (string[3] & 0x3f);
break;
case 5:
unicode = (string[0] & 0x0f) << 24;
unicode += ((string[1] & 0x3f) << 18);
unicode += ((string[2] & 0x3f) << 12);
unicode += ((string[3] & 0x3f) << 6);
unicode += (string[4] & 0x3f);
break;
case 6:
unicode = (string[0] & 0x01) << 30;
unicode += ((string[1] & 0x3f) << 24);
unicode += ((string[2] & 0x3f) << 18);
unicode += ((string[3] & 0x3f) << 12);
unicode += ((string[4] & 0x3f) << 6);
unicode += (string[5] & 0x3f);
break;
default:
return 0;
}
/* Invalid characters could return the special 0xfffd value but NUL
* should be just as good. */
return unicode > 0xffff ? 0 : unicode;
}
/* Calculates how much of string can be shown within the given maximum width
* and sets trimmed parameter to non-zero value if all of string could not be
* shown. If the reserve flag is TRUE, it will reserve at least one
* trailing character, which can be useful when drawing a delimiter.
*
* Returns the number of bytes to output from string to satisfy max_width. */
static inline size_t
utf8_length(const char **start, size_t skip, int *width, size_t max_width, int *trimmed, bool reserve, int tab_size)
{
const char *string = *start;
const char *end = strchr(string, '\0');
unsigned char last_bytes = 0;
size_t last_ucwidth = 0;
*width = 0;
*trimmed = 0;
while (string < end) {
unsigned char bytes = utf8_char_length(string, end);
size_t ucwidth;
unsigned long unicode;
if (string + bytes > end)
break;
/* Change representation to figure out whether
* it is a single- or double-width character. */
unicode = utf8_to_unicode(string, bytes);
/* FIXME: Graceful handling of invalid Unicode character. */
if (!unicode)
break;
ucwidth = unicode_width(unicode, tab_size);
if (skip > 0) {
skip -= ucwidth <= skip ? ucwidth : skip;
*start += bytes;
}
*width += ucwidth;
if (*width > max_width) {
*trimmed = 1;
*width -= ucwidth;
if (reserve && *width == max_width) {
string -= last_bytes;
*width -= last_ucwidth;
}
break;
}
string += bytes;
last_bytes = ucwidth ? bytes : 0;
last_ucwidth = ucwidth;
}
return string - *start;
}
#endif
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