| 1 | #define DISABLE_SIGN_COMPARE_WARNINGS |
| 2 | |
| 3 | #include "git-compat-util.h" |
| 4 | #include "gettext.h" |
| 5 | #include "hex-ll.h" |
| 6 | #include "strbuf.h" |
| 7 | #include "string-list.h" |
| 8 | #include "utf8.h" |
| 9 | #include "date.h" |
| 10 | |
| 11 | bool starts_with(const char *str, const char *prefix) |
| 12 | { |
| 13 | for (; ; str++, prefix++) |
| 14 | if (!*prefix) |
| 15 | return true; |
| 16 | else if (*str != *prefix) |
| 17 | return false; |
| 18 | } |
| 19 | |
| 20 | bool istarts_with(const char *str, const char *prefix) |
| 21 | { |
| 22 | for (; ; str++, prefix++) |
| 23 | if (!*prefix) |
| 24 | return true; |
| 25 | else if (tolower(*str) != tolower(*prefix)) |
| 26 | return false; |
| 27 | } |
| 28 | |
| 29 | bool starts_with_mem(const char *str, size_t len, const char *prefix) |
| 30 | { |
| 31 | const char *end = str + len; |
| 32 | for (; ; str++, prefix++) { |
| 33 | if (!*prefix) |
| 34 | return true; |
| 35 | else if (str == end || *str != *prefix) |
| 36 | return false; |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | bool skip_to_optional_arg_default(const char *str, const char *prefix, |
| 41 | const char **arg, const char *def) |
| 42 | { |
| 43 | const char *p; |
| 44 | |
| 45 | if (!skip_prefix(str, prefix, &p)) |
| 46 | return false; |
| 47 | |
| 48 | if (!*p) { |
| 49 | if (arg) |
| 50 | *arg = def; |
| 51 | return true; |
| 52 | } |
| 53 | |
| 54 | if (*p != '=') |
| 55 | return false; |
| 56 | |
| 57 | if (arg) |
| 58 | *arg = p + 1; |
| 59 | return true; |
| 60 | } |
| 61 | |
| 62 | /* |
| 63 | * Used as the default ->buf value, so that people can always assume |
| 64 | * buf is non NULL and ->buf is NUL terminated even for a freshly |
| 65 | * initialized strbuf. |
| 66 | */ |
| 67 | char strbuf_slopbuf[1]; |
| 68 | |
| 69 | void strbuf_init(struct strbuf *sb, size_t hint) |
| 70 | { |
| 71 | struct strbuf blank = STRBUF_INIT; |
| 72 | memcpy(sb, &blank, sizeof(*sb)); |
| 73 | if (hint) |
| 74 | strbuf_grow(sb, hint); |
| 75 | } |
| 76 | |
| 77 | void strbuf_release(struct strbuf *sb) |
| 78 | { |
| 79 | if (sb->alloc) { |
| 80 | free(sb->buf); |
| 81 | strbuf_init(sb, 0); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | char *strbuf_detach(struct strbuf *sb, size_t *sz) |
| 86 | { |
| 87 | char *res; |
| 88 | strbuf_grow(sb, 0); |
| 89 | res = sb->buf; |
| 90 | if (sz) |
| 91 | *sz = sb->len; |
| 92 | strbuf_init(sb, 0); |
| 93 | return res; |
| 94 | } |
| 95 | |
| 96 | void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc) |
| 97 | { |
| 98 | strbuf_release(sb); |
| 99 | sb->buf = buf; |
| 100 | sb->len = len; |
| 101 | sb->alloc = alloc; |
| 102 | strbuf_grow(sb, 0); |
| 103 | sb->buf[sb->len] = '\0'; |
| 104 | } |
| 105 | |
| 106 | void strbuf_grow(struct strbuf *sb, size_t extra) |
| 107 | { |
| 108 | int new_buf = !sb->alloc; |
| 109 | size_t new_len = st_add3(sb->len, extra, 1); |
| 110 | if (new_buf) |
| 111 | sb->buf = NULL; |
| 112 | ALLOC_GROW(sb->buf, new_len, sb->alloc); |
| 113 | if (new_buf) |
| 114 | sb->buf[0] = '\0'; |
| 115 | } |
| 116 | |
| 117 | void strbuf_trim(struct strbuf *sb) |
| 118 | { |
| 119 | strbuf_rtrim(sb); |
| 120 | strbuf_ltrim(sb); |
| 121 | } |
| 122 | |
| 123 | void strbuf_rtrim(struct strbuf *sb) |
| 124 | { |
| 125 | while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1])) |
| 126 | sb->len--; |
| 127 | sb->buf[sb->len] = '\0'; |
| 128 | } |
| 129 | |
| 130 | void strbuf_trim_trailing_dir_sep(struct strbuf *sb) |
| 131 | { |
| 132 | while (sb->len > 0 && is_dir_sep((unsigned char)sb->buf[sb->len - 1])) |
| 133 | sb->len--; |
| 134 | sb->buf[sb->len] = '\0'; |
| 135 | } |
| 136 | |
| 137 | void strbuf_trim_trailing_newline(struct strbuf *sb) |
| 138 | { |
| 139 | if (sb->len > 0 && sb->buf[sb->len - 1] == '\n') { |
| 140 | if (--sb->len > 0 && sb->buf[sb->len - 1] == '\r') |
| 141 | --sb->len; |
| 142 | sb->buf[sb->len] = '\0'; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | void strbuf_ltrim(struct strbuf *sb) |
| 147 | { |
| 148 | char *b = sb->buf; |
| 149 | while (sb->len > 0 && isspace(*b)) { |
| 150 | b++; |
| 151 | sb->len--; |
| 152 | } |
| 153 | memmove(sb->buf, b, sb->len); |
| 154 | sb->buf[sb->len] = '\0'; |
| 155 | } |
| 156 | |
| 157 | int strbuf_reencode(struct strbuf *sb, const char *from, const char *to) |
| 158 | { |
| 159 | char *out; |
| 160 | size_t len; |
| 161 | |
| 162 | if (same_encoding(from, to)) |
| 163 | return 0; |
| 164 | |
| 165 | out = reencode_string_len(sb->buf, sb->len, to, from, &len); |
| 166 | if (!out) |
| 167 | return -1; |
| 168 | |
| 169 | strbuf_attach(sb, out, len, len + 1); |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | void strbuf_tolower(struct strbuf *sb) |
| 174 | { |
| 175 | char *p = sb->buf, *end = sb->buf + sb->len; |
| 176 | for (; p < end; p++) |
| 177 | *p = tolower(*p); |
| 178 | } |
| 179 | |
| 180 | struct strbuf **strbuf_split_buf(const char *str, size_t slen, |
| 181 | int terminator, int max) |
| 182 | { |
| 183 | struct strbuf **ret = NULL; |
| 184 | size_t nr = 0, alloc = 0; |
| 185 | struct strbuf *t; |
| 186 | |
| 187 | while (slen) { |
| 188 | int len = slen; |
| 189 | if (max <= 0 || nr + 1 < max) { |
| 190 | const char *end = memchr(str, terminator, slen); |
| 191 | if (end) |
| 192 | len = end - str + 1; |
| 193 | } |
| 194 | t = xmalloc(sizeof(struct strbuf)); |
| 195 | strbuf_init(t, len); |
| 196 | strbuf_add(t, str, len); |
| 197 | ALLOC_GROW(ret, nr + 2, alloc); |
| 198 | ret[nr++] = t; |
| 199 | str += len; |
| 200 | slen -= len; |
| 201 | } |
| 202 | ALLOC_GROW(ret, nr + 1, alloc); /* In case string was empty */ |
| 203 | ret[nr] = NULL; |
| 204 | return ret; |
| 205 | } |
| 206 | |
| 207 | void strbuf_add_separated_string_list(struct strbuf *str, |
| 208 | const char *sep, |
| 209 | struct string_list *slist) |
| 210 | { |
| 211 | struct string_list_item *item; |
| 212 | int sep_needed = 0; |
| 213 | |
| 214 | for_each_string_list_item(item, slist) { |
| 215 | if (sep_needed) |
| 216 | strbuf_addstr(str, sep); |
| 217 | strbuf_addstr(str, item->string); |
| 218 | sep_needed = 1; |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | void strbuf_list_free(struct strbuf **sbs) |
| 223 | { |
| 224 | struct strbuf **s = sbs; |
| 225 | |
| 226 | if (!s) |
| 227 | return; |
| 228 | while (*s) { |
| 229 | strbuf_release(*s); |
| 230 | free(*s++); |
| 231 | } |
| 232 | free(sbs); |
| 233 | } |
| 234 | |
| 235 | int strbuf_cmp(const struct strbuf *a, const struct strbuf *b) |
| 236 | { |
| 237 | size_t len = a->len < b->len ? a->len: b->len; |
| 238 | int cmp = memcmp(a->buf, b->buf, len); |
| 239 | if (cmp) |
| 240 | return cmp; |
| 241 | return a->len < b->len ? -1: a->len != b->len; |
| 242 | } |
| 243 | |
| 244 | void strbuf_splice(struct strbuf *sb, size_t pos, size_t len, |
| 245 | const void *data, size_t dlen) |
| 246 | { |
| 247 | if (unsigned_add_overflows(pos, len)) |
| 248 | die("you want to use way too much memory"); |
| 249 | if (pos > sb->len) |
| 250 | die("`pos' is too far after the end of the buffer"); |
| 251 | if (pos + len > sb->len) |
| 252 | die("`pos + len' is too far after the end of the buffer"); |
| 253 | |
| 254 | if (dlen >= len) |
| 255 | strbuf_grow(sb, dlen - len); |
| 256 | memmove(sb->buf + pos + dlen, |
| 257 | sb->buf + pos + len, |
| 258 | sb->len - pos - len); |
| 259 | memcpy(sb->buf + pos, data, dlen); |
| 260 | strbuf_setlen(sb, sb->len + dlen - len); |
| 261 | } |
| 262 | |
| 263 | void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len) |
| 264 | { |
| 265 | strbuf_splice(sb, pos, 0, data, len); |
| 266 | } |
| 267 | |
| 268 | void strbuf_vinsertf(struct strbuf *sb, size_t pos, const char *fmt, va_list ap) |
| 269 | { |
| 270 | int len, len2; |
| 271 | char save; |
| 272 | va_list cp; |
| 273 | |
| 274 | if (pos > sb->len) |
| 275 | die("`pos' is too far after the end of the buffer"); |
| 276 | va_copy(cp, ap); |
| 277 | len = vsnprintf(sb->buf + sb->len, 0, fmt, cp); |
| 278 | va_end(cp); |
| 279 | if (len < 0) |
| 280 | die(_("unable to format message: %s"), fmt); |
| 281 | if (!len) |
| 282 | return; /* nothing to do */ |
| 283 | if (unsigned_add_overflows(sb->len, len)) |
| 284 | die("you want to use way too much memory"); |
| 285 | strbuf_grow(sb, len); |
| 286 | memmove(sb->buf + pos + len, sb->buf + pos, sb->len - pos); |
| 287 | /* vsnprintf() will append a NUL, overwriting one of our characters */ |
| 288 | save = sb->buf[pos + len]; |
| 289 | len2 = vsnprintf(sb->buf + pos, len + 1, fmt, ap); |
| 290 | sb->buf[pos + len] = save; |
| 291 | if (len2 != len) |
| 292 | BUG("your vsnprintf is broken (returns inconsistent lengths)"); |
| 293 | strbuf_setlen(sb, sb->len + len); |
| 294 | } |
| 295 | |
| 296 | void strbuf_insertf(struct strbuf *sb, size_t pos, const char *fmt, ...) |
| 297 | { |
| 298 | va_list ap; |
| 299 | va_start(ap, fmt); |
| 300 | strbuf_vinsertf(sb, pos, fmt, ap); |
| 301 | va_end(ap); |
| 302 | } |
| 303 | |
| 304 | void strbuf_remove(struct strbuf *sb, size_t pos, size_t len) |
| 305 | { |
| 306 | strbuf_splice(sb, pos, len, "", 0); |
| 307 | } |
| 308 | |
| 309 | void strbuf_add(struct strbuf *sb, const void *data, size_t len) |
| 310 | { |
| 311 | strbuf_grow(sb, len); |
| 312 | memcpy(sb->buf + sb->len, data, len); |
| 313 | strbuf_setlen(sb, sb->len + len); |
| 314 | } |
| 315 | |
| 316 | void strbuf_addstrings(struct strbuf *sb, const char *s, size_t n) |
| 317 | { |
| 318 | size_t len = strlen(s); |
| 319 | |
| 320 | strbuf_grow(sb, st_mult(len, n)); |
| 321 | for (size_t i = 0; i < n; i++) |
| 322 | strbuf_add(sb, s, len); |
| 323 | } |
| 324 | |
| 325 | void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2) |
| 326 | { |
| 327 | strbuf_grow(sb, sb2->len); |
| 328 | memcpy(sb->buf + sb->len, sb2->buf, sb2->len); |
| 329 | strbuf_setlen(sb, sb->len + sb2->len); |
| 330 | } |
| 331 | |
| 332 | const char *strbuf_join_argv(struct strbuf *buf, |
| 333 | int argc, const char **argv, char delim) |
| 334 | { |
| 335 | if (!argc) |
| 336 | return buf->buf; |
| 337 | |
| 338 | strbuf_addstr(buf, *argv); |
| 339 | while (--argc) { |
| 340 | strbuf_addch(buf, delim); |
| 341 | strbuf_addstr(buf, *(++argv)); |
| 342 | } |
| 343 | |
| 344 | return buf->buf; |
| 345 | } |
| 346 | |
| 347 | void strbuf_addchars(struct strbuf *sb, int c, size_t n) |
| 348 | { |
| 349 | strbuf_grow(sb, n); |
| 350 | memset(sb->buf + sb->len, c, n); |
| 351 | strbuf_setlen(sb, sb->len + n); |
| 352 | } |
| 353 | |
| 354 | void strbuf_addf(struct strbuf *sb, const char *fmt, ...) |
| 355 | { |
| 356 | va_list ap; |
| 357 | va_start(ap, fmt); |
| 358 | strbuf_vaddf(sb, fmt, ap); |
| 359 | va_end(ap); |
| 360 | } |
| 361 | |
| 362 | void strbuf_add_uint(struct strbuf *sb, uintmax_t value) |
| 363 | { |
| 364 | char buf[DIV_ROUND_UP(bitsizeof(value) * 10, 33)]; |
| 365 | char *end = buf + sizeof(buf); |
| 366 | char *p = end; |
| 367 | |
| 368 | do |
| 369 | *--p = "0123456789"[value % 10]; |
| 370 | while (value /= 10); |
| 371 | strbuf_add(sb, p, end - p); |
| 372 | } |
| 373 | |
| 374 | static void add_lines(struct strbuf *out, |
| 375 | const char *prefix, |
| 376 | const char *buf, size_t size, |
| 377 | int space_after_prefix) |
| 378 | { |
| 379 | while (size) { |
| 380 | const char *next = memchr(buf, '\n', size); |
| 381 | next = next ? (next + 1) : (buf + size); |
| 382 | |
| 383 | strbuf_addstr(out, prefix); |
| 384 | if (space_after_prefix && buf[0] != '\n' && buf[0] != '\t') |
| 385 | strbuf_addch(out, ' '); |
| 386 | strbuf_add(out, buf, next - buf); |
| 387 | size -= next - buf; |
| 388 | buf = next; |
| 389 | } |
| 390 | strbuf_complete_line(out); |
| 391 | } |
| 392 | |
| 393 | void strbuf_add_commented_lines(struct strbuf *out, const char *buf, |
| 394 | size_t size, const char *comment_prefix) |
| 395 | { |
| 396 | add_lines(out, comment_prefix, buf, size, 1); |
| 397 | } |
| 398 | |
| 399 | void strbuf_commented_addf(struct strbuf *sb, const char *comment_prefix, |
| 400 | const char *fmt, ...) |
| 401 | { |
| 402 | va_list params; |
| 403 | struct strbuf buf = STRBUF_INIT; |
| 404 | int incomplete_line = sb->len && sb->buf[sb->len - 1] != '\n'; |
| 405 | |
| 406 | va_start(params, fmt); |
| 407 | strbuf_vaddf(&buf, fmt, params); |
| 408 | va_end(params); |
| 409 | |
| 410 | strbuf_add_commented_lines(sb, buf.buf, buf.len, comment_prefix); |
| 411 | if (incomplete_line) |
| 412 | sb->buf[--sb->len] = '\0'; |
| 413 | |
| 414 | strbuf_release(&buf); |
| 415 | } |
| 416 | |
| 417 | void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap) |
| 418 | { |
| 419 | int len; |
| 420 | va_list cp; |
| 421 | |
| 422 | if (!strbuf_avail(sb)) |
| 423 | strbuf_grow(sb, 64); |
| 424 | va_copy(cp, ap); |
| 425 | len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp); |
| 426 | va_end(cp); |
| 427 | if (len < 0) |
| 428 | die(_("unable to format message: %s"), fmt); |
| 429 | if (len > strbuf_avail(sb)) { |
| 430 | strbuf_grow(sb, len); |
| 431 | len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); |
| 432 | if (len > strbuf_avail(sb)) |
| 433 | BUG("your vsnprintf is broken (insatiable)"); |
| 434 | } |
| 435 | strbuf_setlen(sb, sb->len + len); |
| 436 | } |
| 437 | |
| 438 | int strbuf_expand_step(struct strbuf *sb, const char **formatp) |
| 439 | { |
| 440 | const char *format = *formatp; |
| 441 | const char *percent = strchrnul(format, '%'); |
| 442 | |
| 443 | strbuf_add(sb, format, percent - format); |
| 444 | if (!*percent) |
| 445 | return 0; |
| 446 | *formatp = percent + 1; |
| 447 | return 1; |
| 448 | } |
| 449 | |
| 450 | size_t strbuf_expand_literal(struct strbuf *sb, const char *placeholder) |
| 451 | { |
| 452 | int ch; |
| 453 | |
| 454 | switch (placeholder[0]) { |
| 455 | case 'n': /* newline */ |
| 456 | strbuf_addch(sb, '\n'); |
| 457 | return 1; |
| 458 | case 'x': |
| 459 | /* %x00 == NUL, %x0a == LF, etc. */ |
| 460 | ch = hex2chr(placeholder + 1); |
| 461 | if (ch < 0) |
| 462 | return 0; |
| 463 | strbuf_addch(sb, ch); |
| 464 | return 3; |
| 465 | } |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | void strbuf_expand_bad_format(const char *format, const char *command) |
| 470 | { |
| 471 | const char *end; |
| 472 | |
| 473 | if (*format != '(') |
| 474 | /* TRANSLATORS: The first %s is a command like "ls-tree". */ |
| 475 | die(_("bad %s format: element '%s' does not start with '('"), |
| 476 | command, format); |
| 477 | |
| 478 | end = strchr(format + 1, ')'); |
| 479 | if (!end) |
| 480 | /* TRANSLATORS: The first %s is a command like "ls-tree". */ |
| 481 | die(_("bad %s format: element '%s' does not end in ')'"), |
| 482 | command, format); |
| 483 | |
| 484 | /* TRANSLATORS: %s is a command like "ls-tree". */ |
| 485 | die(_("bad %s format: %%%.*s"), |
| 486 | command, (int)(end - format + 1), format); |
| 487 | } |
| 488 | |
| 489 | void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src) |
| 490 | { |
| 491 | size_t i, len = src->len; |
| 492 | |
| 493 | for (i = 0; i < len; i++) { |
| 494 | if (src->buf[i] == '%') |
| 495 | strbuf_addch(dst, '%'); |
| 496 | strbuf_addch(dst, src->buf[i]); |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | #define URL_UNSAFE_CHARS " <>\"%{}|\\^`:?#[]@!$&'()*+,;=" |
| 501 | |
| 502 | void strbuf_add_percentencode(struct strbuf *dst, const char *src, int flags) |
| 503 | { |
| 504 | size_t i, len = strlen(src); |
| 505 | |
| 506 | for (i = 0; i < len; i++) { |
| 507 | unsigned char ch = src[i]; |
| 508 | if (ch <= 0x1F || ch >= 0x7F || |
| 509 | (ch == '/' && (flags & STRBUF_ENCODE_SLASH)) || |
| 510 | ((flags & STRBUF_ENCODE_HOST_AND_PORT) ? |
| 511 | !isalnum(ch) && !strchr("-.:[]", ch) : |
| 512 | !!strchr(URL_UNSAFE_CHARS, ch))) |
| 513 | strbuf_addf(dst, "%%%02X", (unsigned char)ch); |
| 514 | else |
| 515 | strbuf_addch(dst, ch); |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f) |
| 520 | { |
| 521 | size_t res; |
| 522 | size_t oldalloc = sb->alloc; |
| 523 | |
| 524 | strbuf_grow(sb, size); |
| 525 | res = fread(sb->buf + sb->len, 1, size, f); |
| 526 | if (res > 0) |
| 527 | strbuf_setlen(sb, sb->len + res); |
| 528 | else if (oldalloc == 0) |
| 529 | strbuf_release(sb); |
| 530 | return res; |
| 531 | } |
| 532 | |
| 533 | ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint) |
| 534 | { |
| 535 | size_t oldlen = sb->len; |
| 536 | size_t oldalloc = sb->alloc; |
| 537 | |
| 538 | strbuf_grow(sb, hint ? hint : 8192); |
| 539 | for (;;) { |
| 540 | ssize_t want = sb->alloc - sb->len - 1; |
| 541 | ssize_t got = read_in_full(fd, sb->buf + sb->len, want); |
| 542 | |
| 543 | if (got < 0) { |
| 544 | if (oldalloc == 0) |
| 545 | strbuf_release(sb); |
| 546 | else |
| 547 | strbuf_setlen(sb, oldlen); |
| 548 | return -1; |
| 549 | } |
| 550 | sb->len += got; |
| 551 | if (got < want) |
| 552 | break; |
| 553 | strbuf_grow(sb, 8192); |
| 554 | } |
| 555 | |
| 556 | sb->buf[sb->len] = '\0'; |
| 557 | return sb->len - oldlen; |
| 558 | } |
| 559 | |
| 560 | ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint) |
| 561 | { |
| 562 | size_t oldalloc = sb->alloc; |
| 563 | ssize_t cnt; |
| 564 | |
| 565 | strbuf_grow(sb, hint ? hint : 8192); |
| 566 | cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1); |
| 567 | if (cnt > 0) |
| 568 | strbuf_setlen(sb, sb->len + cnt); |
| 569 | else if (oldalloc == 0) |
| 570 | strbuf_release(sb); |
| 571 | return cnt; |
| 572 | } |
| 573 | |
| 574 | ssize_t strbuf_write(struct strbuf *sb, FILE *f) |
| 575 | { |
| 576 | return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0; |
| 577 | } |
| 578 | |
| 579 | #define STRBUF_MAXLINK (32767) |
| 580 | |
| 581 | int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint) |
| 582 | { |
| 583 | size_t oldalloc = sb->alloc; |
| 584 | |
| 585 | if (hint < 32) |
| 586 | hint = 32; |
| 587 | |
| 588 | while (hint < STRBUF_MAXLINK) { |
| 589 | ssize_t len; |
| 590 | |
| 591 | strbuf_grow(sb, hint + 1); |
| 592 | len = readlink(path, sb->buf, hint + 1); |
| 593 | if (len < 0) { |
| 594 | if (errno != ERANGE) |
| 595 | break; |
| 596 | } else if (len <= hint) { |
| 597 | strbuf_setlen(sb, len); |
| 598 | return 0; |
| 599 | } |
| 600 | |
| 601 | /* .. the buffer was too small - try again */ |
| 602 | hint *= 2; |
| 603 | } |
| 604 | if (oldalloc == 0) |
| 605 | strbuf_release(sb); |
| 606 | return -1; |
| 607 | } |
| 608 | |
| 609 | int strbuf_getcwd(struct strbuf *sb) |
| 610 | { |
| 611 | size_t oldalloc = sb->alloc; |
| 612 | size_t guessed_len = 128; |
| 613 | |
| 614 | for (;; guessed_len *= 2) { |
| 615 | strbuf_grow(sb, guessed_len); |
| 616 | if (getcwd(sb->buf, sb->alloc)) { |
| 617 | strbuf_setlen(sb, strlen(sb->buf)); |
| 618 | return 0; |
| 619 | } |
| 620 | |
| 621 | /* |
| 622 | * If getcwd(3) is implemented as a syscall that falls |
| 623 | * back to a regular lookup using readdir(3) etc. then |
| 624 | * we may be able to avoid EACCES by providing enough |
| 625 | * space to the syscall as it's not necessarily bound |
| 626 | * to the same restrictions as the fallback. |
| 627 | */ |
| 628 | if (errno == EACCES && guessed_len < PATH_MAX) |
| 629 | continue; |
| 630 | |
| 631 | if (errno != ERANGE) |
| 632 | break; |
| 633 | } |
| 634 | if (oldalloc == 0) |
| 635 | strbuf_release(sb); |
| 636 | else |
| 637 | strbuf_reset(sb); |
| 638 | return -1; |
| 639 | } |
| 640 | |
| 641 | #ifdef HAVE_GETDELIM |
| 642 | int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term) |
| 643 | { |
| 644 | ssize_t r; |
| 645 | |
| 646 | if (feof(fp)) |
| 647 | return EOF; |
| 648 | |
| 649 | strbuf_reset(sb); |
| 650 | |
| 651 | /* Translate slopbuf to NULL, as we cannot call realloc on it */ |
| 652 | if (!sb->alloc) |
| 653 | sb->buf = NULL; |
| 654 | errno = 0; |
| 655 | r = getdelim(&sb->buf, &sb->alloc, term, fp); |
| 656 | |
| 657 | if (r > 0) { |
| 658 | sb->len = r; |
| 659 | return 0; |
| 660 | } |
| 661 | assert(r == -1); |
| 662 | |
| 663 | /* |
| 664 | * Normally we would have called xrealloc, which will try to free |
| 665 | * memory and recover. But we have no way to tell getdelim() to do so. |
| 666 | * Worse, we cannot try to recover ENOMEM ourselves, because we have |
| 667 | * no idea how many bytes were read by getdelim. |
| 668 | * |
| 669 | * Dying here is reasonable. It mirrors what xrealloc would do on |
| 670 | * catastrophic memory failure. We skip the opportunity to free pack |
| 671 | * memory and retry, but that's unlikely to help for a malloc small |
| 672 | * enough to hold a single line of input, anyway. |
| 673 | */ |
| 674 | if (errno == ENOMEM) |
| 675 | die("Out of memory, getdelim failed"); |
| 676 | |
| 677 | /* |
| 678 | * Restore strbuf invariants; if getdelim left us with a NULL pointer, |
| 679 | * we can just re-init, but otherwise we should make sure that our |
| 680 | * length is empty, and that the result is NUL-terminated. |
| 681 | */ |
| 682 | if (!sb->buf) |
| 683 | strbuf_init(sb, 0); |
| 684 | else |
| 685 | strbuf_reset(sb); |
| 686 | return EOF; |
| 687 | } |
| 688 | #else |
| 689 | int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term) |
| 690 | { |
| 691 | int ch; |
| 692 | |
| 693 | if (feof(fp)) |
| 694 | return EOF; |
| 695 | |
| 696 | strbuf_reset(sb); |
| 697 | flockfile(fp); |
| 698 | while ((ch = getc_unlocked(fp)) != EOF) { |
| 699 | if (!strbuf_avail(sb)) |
| 700 | strbuf_grow(sb, 1); |
| 701 | sb->buf[sb->len++] = ch; |
| 702 | if (ch == term) |
| 703 | break; |
| 704 | } |
| 705 | funlockfile(fp); |
| 706 | if (ch == EOF && sb->len == 0) |
| 707 | return EOF; |
| 708 | |
| 709 | sb->buf[sb->len] = '\0'; |
| 710 | return 0; |
| 711 | } |
| 712 | #endif |
| 713 | |
| 714 | int strbuf_appendwholeline(struct strbuf *sb, FILE *fp, int term) |
| 715 | { |
| 716 | struct strbuf line = STRBUF_INIT; |
| 717 | if (strbuf_getwholeline(&line, fp, term)) { |
| 718 | strbuf_release(&line); |
| 719 | return EOF; |
| 720 | } |
| 721 | strbuf_addbuf(sb, &line); |
| 722 | strbuf_release(&line); |
| 723 | return 0; |
| 724 | } |
| 725 | |
| 726 | static int strbuf_getdelim(struct strbuf *sb, FILE *fp, int term) |
| 727 | { |
| 728 | if (strbuf_getwholeline(sb, fp, term)) |
| 729 | return EOF; |
| 730 | if (sb->buf[sb->len - 1] == term) |
| 731 | strbuf_setlen(sb, sb->len - 1); |
| 732 | return 0; |
| 733 | } |
| 734 | |
| 735 | int strbuf_getdelim_strip_crlf(struct strbuf *sb, FILE *fp, int term) |
| 736 | { |
| 737 | if (strbuf_getwholeline(sb, fp, term)) |
| 738 | return EOF; |
| 739 | if (term == '\n' && sb->buf[sb->len - 1] == '\n') { |
| 740 | strbuf_setlen(sb, sb->len - 1); |
| 741 | if (sb->len && sb->buf[sb->len - 1] == '\r') |
| 742 | strbuf_setlen(sb, sb->len - 1); |
| 743 | } |
| 744 | return 0; |
| 745 | } |
| 746 | |
| 747 | int strbuf_getline(struct strbuf *sb, FILE *fp) |
| 748 | { |
| 749 | return strbuf_getdelim_strip_crlf(sb, fp, '\n'); |
| 750 | } |
| 751 | |
| 752 | int strbuf_getline_lf(struct strbuf *sb, FILE *fp) |
| 753 | { |
| 754 | return strbuf_getdelim(sb, fp, '\n'); |
| 755 | } |
| 756 | |
| 757 | int strbuf_getline_nul(struct strbuf *sb, FILE *fp) |
| 758 | { |
| 759 | return strbuf_getdelim(sb, fp, '\0'); |
| 760 | } |
| 761 | |
| 762 | int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term) |
| 763 | { |
| 764 | strbuf_reset(sb); |
| 765 | |
| 766 | while (1) { |
| 767 | char ch; |
| 768 | ssize_t len = xread(fd, &ch, 1); |
| 769 | if (len <= 0) |
| 770 | return EOF; |
| 771 | strbuf_addch(sb, ch); |
| 772 | if (ch == term) |
| 773 | break; |
| 774 | } |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint) |
| 779 | { |
| 780 | int fd; |
| 781 | ssize_t len; |
| 782 | int saved_errno; |
| 783 | |
| 784 | fd = open(path, O_RDONLY); |
| 785 | if (fd < 0) |
| 786 | return -1; |
| 787 | len = strbuf_read(sb, fd, hint); |
| 788 | saved_errno = errno; |
| 789 | close(fd); |
| 790 | if (len < 0) { |
| 791 | errno = saved_errno; |
| 792 | return -1; |
| 793 | } |
| 794 | |
| 795 | return len; |
| 796 | } |
| 797 | |
| 798 | void strbuf_add_lines(struct strbuf *out, const char *prefix, |
| 799 | const char *buf, size_t size) |
| 800 | { |
| 801 | add_lines(out, prefix, buf, size, 0); |
| 802 | } |
| 803 | |
| 804 | void strbuf_addstr_xml_quoted(struct strbuf *buf, const char *s) |
| 805 | { |
| 806 | while (*s) { |
| 807 | size_t len = strcspn(s, "\"<>&"); |
| 808 | strbuf_add(buf, s, len); |
| 809 | s += len; |
| 810 | switch (*s) { |
| 811 | case '"': |
| 812 | strbuf_addstr(buf, """); |
| 813 | break; |
| 814 | case '<': |
| 815 | strbuf_addstr(buf, "<"); |
| 816 | break; |
| 817 | case '>': |
| 818 | strbuf_addstr(buf, ">"); |
| 819 | break; |
| 820 | case '&': |
| 821 | strbuf_addstr(buf, "&"); |
| 822 | break; |
| 823 | case 0: |
| 824 | return; |
| 825 | } |
| 826 | s++; |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len, |
| 831 | char_predicate allow_unencoded_fn) |
| 832 | { |
| 833 | strbuf_grow(sb, len); |
| 834 | while (len--) { |
| 835 | char ch = *s++; |
| 836 | if (allow_unencoded_fn(ch)) |
| 837 | strbuf_addch(sb, ch); |
| 838 | else |
| 839 | strbuf_addf(sb, "%%%02x", (unsigned char)ch); |
| 840 | } |
| 841 | } |
| 842 | |
| 843 | void strbuf_addstr_urlencode(struct strbuf *sb, const char *s, |
| 844 | char_predicate allow_unencoded_fn) |
| 845 | { |
| 846 | strbuf_add_urlencode(sb, s, strlen(s), allow_unencoded_fn); |
| 847 | } |
| 848 | |
| 849 | void humanise_count(size_t count, char **value, const char **unit) |
| 850 | { |
| 851 | if (count >= 1000000000) { |
| 852 | size_t x = count + 5000000; /* for rounding */ |
| 853 | *value = xstrfmt(_("%u.%2.2u"), (unsigned)(x / 1000000000), |
| 854 | (unsigned)(x % 1000000000 / 10000000)); |
| 855 | /* TRANSLATORS: SI decimal prefix symbol for 10^9 */ |
| 856 | *unit = _("G"); |
| 857 | } else if (count >= 1000000) { |
| 858 | size_t x = count + 5000; /* for rounding */ |
| 859 | *value = xstrfmt(_("%u.%2.2u"), (unsigned)(x / 1000000), |
| 860 | (unsigned)(x % 1000000 / 10000)); |
| 861 | /* TRANSLATORS: SI decimal prefix symbol for 10^6 */ |
| 862 | *unit = _("M"); |
| 863 | } else if (count >= 1000) { |
| 864 | size_t x = count + 5; /* for rounding */ |
| 865 | *value = xstrfmt(_("%u.%2.2u"), (unsigned)(x / 1000), |
| 866 | (unsigned)(x % 1000 / 10)); |
| 867 | /* TRANSLATORS: SI decimal prefix symbol for 10^3 */ |
| 868 | *unit = _("k"); |
| 869 | } else { |
| 870 | *value = xstrfmt("%u", (unsigned)count); |
| 871 | *unit = NULL; |
| 872 | } |
| 873 | } |
| 874 | |
| 875 | void humanise_bytes(off_t bytes, char **value, const char **unit, |
| 876 | unsigned flags) |
| 877 | { |
| 878 | int humanise_rate = flags & HUMANISE_RATE; |
| 879 | |
| 880 | if (bytes > 1 << 30) { |
| 881 | *value = xstrfmt(_("%u.%2.2u"), (unsigned)(bytes >> 30), |
| 882 | (unsigned)(bytes & ((1 << 30) - 1)) / 10737419); |
| 883 | /* TRANSLATORS: IEC 80000-13:2008 gibibyte/second and gibibyte */ |
| 884 | *unit = humanise_rate ? _("GiB/s") : _("GiB"); |
| 885 | } else if (bytes > 1 << 20) { |
| 886 | unsigned x = bytes + 5243; /* for rounding */ |
| 887 | *value = xstrfmt(_("%u.%2.2u"), x >> 20, |
| 888 | ((x & ((1 << 20) - 1)) * 100) >> 20); |
| 889 | /* TRANSLATORS: IEC 80000-13:2008 mebibyte/second and mebibyte */ |
| 890 | *unit = humanise_rate ? _("MiB/s") : _("MiB"); |
| 891 | } else if (bytes > 1 << 10) { |
| 892 | unsigned x = bytes + 5; /* for rounding */ |
| 893 | *value = xstrfmt(_("%u.%2.2u"), x >> 10, |
| 894 | ((x & ((1 << 10) - 1)) * 100) >> 10); |
| 895 | /* TRANSLATORS: IEC 80000-13:2008 kibibyte/second and kibibyte */ |
| 896 | *unit = humanise_rate ? _("KiB/s") : _("KiB"); |
| 897 | } else { |
| 898 | *value = xstrfmt("%u", (unsigned)bytes); |
| 899 | if (flags & HUMANISE_COMPACT) |
| 900 | /* TRANSLATORS: IEC 80000-13:2008 byte/second and byte */ |
| 901 | *unit = humanise_rate ? _("B/s") : _("B"); |
| 902 | else |
| 903 | *unit = humanise_rate ? |
| 904 | /* TRANSLATORS: IEC 80000-13:2008 byte/second */ |
| 905 | Q_("byte/s", "bytes/s", bytes) : |
| 906 | /* TRANSLATORS: IEC 80000-13:2008 byte */ |
| 907 | Q_("byte", "bytes", bytes); |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | static void strbuf_humanise(struct strbuf *buf, off_t bytes, unsigned flags) |
| 912 | { |
| 913 | char *value; |
| 914 | const char *unit; |
| 915 | |
| 916 | humanise_bytes(bytes, &value, &unit, flags); |
| 917 | |
| 918 | /* |
| 919 | * TRANSLATORS: The first argument is the number string. The second |
| 920 | * argument is the unit string (i.e. "12.34 MiB/s"). |
| 921 | */ |
| 922 | strbuf_addf(buf, _("%s %s"), value, unit); |
| 923 | free(value); |
| 924 | } |
| 925 | |
| 926 | void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes) |
| 927 | { |
| 928 | strbuf_humanise(buf, bytes, 0); |
| 929 | } |
| 930 | |
| 931 | void strbuf_humanise_rate(struct strbuf *buf, off_t bytes) |
| 932 | { |
| 933 | strbuf_humanise(buf, bytes, HUMANISE_RATE); |
| 934 | } |
| 935 | |
| 936 | int printf_ln(const char *fmt, ...) |
| 937 | { |
| 938 | int ret; |
| 939 | va_list ap; |
| 940 | va_start(ap, fmt); |
| 941 | ret = vprintf(fmt, ap); |
| 942 | va_end(ap); |
| 943 | if (ret < 0 || putchar('\n') == EOF) |
| 944 | return -1; |
| 945 | return ret + 1; |
| 946 | } |
| 947 | |
| 948 | int fprintf_ln(FILE *fp, const char *fmt, ...) |
| 949 | { |
| 950 | int ret; |
| 951 | va_list ap; |
| 952 | va_start(ap, fmt); |
| 953 | ret = vfprintf(fp, fmt, ap); |
| 954 | va_end(ap); |
| 955 | if (ret < 0 || putc('\n', fp) == EOF) |
| 956 | return -1; |
| 957 | return ret + 1; |
| 958 | } |
| 959 | |
| 960 | char *xstrdup_tolower(const char *string) |
| 961 | { |
| 962 | char *result; |
| 963 | size_t len, i; |
| 964 | |
| 965 | len = strlen(string); |
| 966 | result = xmallocz(len); |
| 967 | for (i = 0; i < len; i++) |
| 968 | result[i] = tolower(string[i]); |
| 969 | return result; |
| 970 | } |
| 971 | |
| 972 | char *xstrdup_toupper(const char *string) |
| 973 | { |
| 974 | char *result; |
| 975 | size_t len, i; |
| 976 | |
| 977 | len = strlen(string); |
| 978 | result = xmallocz(len); |
| 979 | for (i = 0; i < len; i++) |
| 980 | result[i] = toupper(string[i]); |
| 981 | return result; |
| 982 | } |
| 983 | |
| 984 | char *xstrvfmt(const char *fmt, va_list ap) |
| 985 | { |
| 986 | struct strbuf buf = STRBUF_INIT; |
| 987 | strbuf_vaddf(&buf, fmt, ap); |
| 988 | return strbuf_detach(&buf, NULL); |
| 989 | } |
| 990 | |
| 991 | char *xstrfmt(const char *fmt, ...) |
| 992 | { |
| 993 | va_list ap; |
| 994 | char *ret; |
| 995 | |
| 996 | va_start(ap, fmt); |
| 997 | ret = xstrvfmt(fmt, ap); |
| 998 | va_end(ap); |
| 999 | |
| 1000 | return ret; |
| 1001 | } |
| 1002 | |
| 1003 | void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm, |
| 1004 | int tz_offset, int suppress_tz_name) |
| 1005 | { |
| 1006 | struct strbuf munged_fmt = STRBUF_INIT; |
| 1007 | size_t hint = 128; |
| 1008 | size_t len; |
| 1009 | |
| 1010 | if (!*fmt) |
| 1011 | return; |
| 1012 | |
| 1013 | /* |
| 1014 | * There is no portable way to pass timezone information to |
| 1015 | * strftime, so we handle %z and %Z here. Likewise '%s', because |
| 1016 | * going back to an epoch time requires knowing the zone. |
| 1017 | * |
| 1018 | * Note that tz_offset is in the "[-+]HHMM" decimal form; this is what |
| 1019 | * we want for %z, but the computation for %s has to convert to number |
| 1020 | * of seconds. |
| 1021 | */ |
| 1022 | while (strbuf_expand_step(&munged_fmt, &fmt)) { |
| 1023 | if (skip_prefix(fmt, "%", &fmt)) |
| 1024 | strbuf_addstr(&munged_fmt, "%%"); |
| 1025 | else if (skip_prefix(fmt, "s", &fmt)) |
| 1026 | strbuf_addf(&munged_fmt, "%"PRItime, |
| 1027 | (timestamp_t)tm_to_time_t(tm) - |
| 1028 | 3600 * (tz_offset / 100) - |
| 1029 | 60 * (tz_offset % 100)); |
| 1030 | else if (skip_prefix(fmt, "z", &fmt)) |
| 1031 | strbuf_addf(&munged_fmt, "%+05d", tz_offset); |
| 1032 | else if (suppress_tz_name && skip_prefix(fmt, "Z", &fmt)) |
| 1033 | ; /* nothing */ |
| 1034 | else |
| 1035 | strbuf_addch(&munged_fmt, '%'); |
| 1036 | } |
| 1037 | fmt = munged_fmt.buf; |
| 1038 | |
| 1039 | strbuf_grow(sb, hint); |
| 1040 | len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm); |
| 1041 | |
| 1042 | if (!len) { |
| 1043 | /* |
| 1044 | * strftime reports "0" if it could not fit the result in the buffer. |
| 1045 | * Unfortunately, it also reports "0" if the requested time string |
| 1046 | * takes 0 bytes. So our strategy is to munge the format so that the |
| 1047 | * output contains at least one character, and then drop the extra |
| 1048 | * character before returning. |
| 1049 | */ |
| 1050 | strbuf_addch(&munged_fmt, ' '); |
| 1051 | while (!len) { |
| 1052 | hint *= 2; |
| 1053 | strbuf_grow(sb, hint); |
| 1054 | len = strftime(sb->buf + sb->len, sb->alloc - sb->len, |
| 1055 | munged_fmt.buf, tm); |
| 1056 | } |
| 1057 | len--; /* drop munged space */ |
| 1058 | } |
| 1059 | strbuf_release(&munged_fmt); |
| 1060 | strbuf_setlen(sb, sb->len + len); |
| 1061 | } |
| 1062 | |
| 1063 | /* |
| 1064 | * Returns the length of a line, without trailing spaces. |
| 1065 | * |
| 1066 | * If the line ends with newline, it will be removed too. |
| 1067 | */ |
| 1068 | static size_t cleanup(char *line, size_t len) |
| 1069 | { |
| 1070 | while (len) { |
| 1071 | unsigned char c = line[len - 1]; |
| 1072 | if (!isspace(c)) |
| 1073 | break; |
| 1074 | len--; |
| 1075 | } |
| 1076 | |
| 1077 | return len; |
| 1078 | } |
| 1079 | |
| 1080 | /* |
| 1081 | * Remove empty lines from the beginning and end |
| 1082 | * and also trailing spaces from every line. |
| 1083 | * |
| 1084 | * Turn multiple consecutive empty lines between paragraphs |
| 1085 | * into just one empty line. |
| 1086 | * |
| 1087 | * If the input has only empty lines and spaces, |
| 1088 | * no output will be produced. |
| 1089 | * |
| 1090 | * If last line does not have a newline at the end, one is added. |
| 1091 | * |
| 1092 | * Pass a non-NULL comment_prefix to skip every line starting |
| 1093 | * with it. |
| 1094 | */ |
| 1095 | void strbuf_stripspace(struct strbuf *sb, const char *comment_prefix) |
| 1096 | { |
| 1097 | size_t empties = 0; |
| 1098 | size_t i, j, len, newlen; |
| 1099 | char *eol; |
| 1100 | |
| 1101 | /* We may have to add a newline. */ |
| 1102 | strbuf_grow(sb, 1); |
| 1103 | |
| 1104 | for (i = j = 0; i < sb->len; i += len, j += newlen) { |
| 1105 | eol = memchr(sb->buf + i, '\n', sb->len - i); |
| 1106 | len = eol ? eol - (sb->buf + i) + 1 : sb->len - i; |
| 1107 | |
| 1108 | if (comment_prefix && len && |
| 1109 | starts_with(sb->buf + i, comment_prefix)) { |
| 1110 | newlen = 0; |
| 1111 | continue; |
| 1112 | } |
| 1113 | newlen = cleanup(sb->buf + i, len); |
| 1114 | |
| 1115 | /* Not just an empty line? */ |
| 1116 | if (newlen) { |
| 1117 | if (empties > 0 && j > 0) |
| 1118 | sb->buf[j++] = '\n'; |
| 1119 | empties = 0; |
| 1120 | memmove(sb->buf + j, sb->buf + i, newlen); |
| 1121 | sb->buf[newlen + j++] = '\n'; |
| 1122 | } else { |
| 1123 | empties++; |
| 1124 | } |
| 1125 | } |
| 1126 | |
| 1127 | strbuf_setlen(sb, j); |
| 1128 | } |
| 1129 | |
| 1130 | void strbuf_strip_file_from_path(struct strbuf *sb) |
| 1131 | { |
| 1132 | const char *path_sep = find_last_dir_sep(sb->buf); |
| 1133 | strbuf_setlen(sb, path_sep ? path_sep - sb->buf + 1 : 0); |
| 1134 | } |