Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

file 598 lines (490 sloc) 14.712 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598
/* 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

#if defined HAVE_NCURSESW_CURSES_H
# include <ncursesw/curses.h>
#elif defined HAVE_NCURSESW_H
# include <ncursesw.h>
#elif defined HAVE_NCURSES_CURSES_H
# include <ncurses/curses.h>
#elif defined HAVE_NCURSES_H
# include <ncurses.h>
#elif defined HAVE_CURSES_H
# include <curses.h>
#else
# warning SysV or X/Open-compatible Curses installation is required.
# warning Will assume Curses is found in default include and library path.
# warning To fix any build issues please use autotools to configure Curses.
# warning See INSTALL file for instructions.
# include <curses.h>
#endif

#if __GNUC__ >= 3
#define TIG_NORETURN __attribute__((__noreturn__))
#define PRINTF_LIKE(fmt, args) __attribute__((format (printf, fmt, args)))
#else
#define TIG_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_WIDTH STRING_SIZE("2006-04-29 14:21")
#define DATE_SHORT_WIDTH STRING_SIZE("2006-04-29")

#define ID_WIDTH 7
#define AUTHOR_WIDTH 18
#define FILENAME_WIDTH 18

#define MIN_VIEW_HEIGHT 4
#define MIN_VIEW_WIDTH 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
Something went wrong with that request. Please try again.