static int read_offset_code(LHANewDecoder *decoder) { int bits, result; bits = read_from_tree(&decoder->bit_stream_reader, decoder->offset_tree); if (bits < 0) { return -1; } // The code read indicates the length of the offset in bits. // // The returned value looks like this: // bits = 0 -> 0 // bits = 1 -> 1 // bits = 2 -> 1x // bits = 3 -> 1xx // bits = 4 -> 1xxx // etc. if (bits == 0) { return 0; } else if (bits == 1) { return 1; } else { result = read_bits(&decoder->bit_stream_reader, bits - 1); if (result < 0) { return -1; } return result + (1 << (bits - 1)); } }
static size_t lha_pm2_decoder_read(void *data, uint8_t *buf) { LHAPM2Decoder *decoder = data; size_t result; int code; // On first pass through, build initial lookup trees. if (decoder->tree_state == PM2_REBUILD_UNBUILT) { // First bit in stream is discarded? read_bit(&decoder->bit_stream_reader); rebuild_tree(decoder); } result = 0; code = read_from_tree(&decoder->bit_stream_reader, decoder->code_tree); if (code < 0) { return 0; } if (code < 8) { read_single_byte(decoder, (unsigned int) code, buf, &result); } else { copy_from_history(decoder, (unsigned int) code - 8, buf, &result); } return result; }
static int history_get_offset(LHAPM2Decoder *decoder, unsigned int code) { unsigned int bits; int result, val; result = 0; // Calculate number of bits to read. // Code of zero indicates a simple 6-bit value giving the offset. if (code == 0) { bits = 6; } // Mid-range encoded offset value. // Read a code using the offset tree, indicating the length // of the offset value to follow. The code indicates the // number of bits (values 0-7 = 6-13 bits). else if (code < 20) { val = read_from_tree(&decoder->bit_stream_reader, decoder->offset_tree); if (val < 0) { return -1; } else if (val == 0) { bits = 6; } else { bits = (unsigned int) val + 5; result = 1 << bits; } } // Large copy values start from offset zero. else { return 0; } // Read a number of bits representing the offset value. The // number of length of this value is variable, and is calculated // above. val = read_bits(&decoder->bit_stream_reader, bits); if (val < 0) { return -1; } result += val; return result; }
int cmd_reset(int argc, const char **argv, const char *prefix) { int reset_type = NONE, update_ref_status = 0, quiet = 0; int patch_mode = 0, unborn; const char *rev; unsigned char sha1[20]; const char **pathspec = NULL; const struct option options[] = { OPT__QUIET(&quiet, N_("be quiet, only report errors")), OPT_SET_INT(0, "mixed", &reset_type, N_("reset HEAD and index"), MIXED), OPT_SET_INT(0, "soft", &reset_type, N_("reset only HEAD"), SOFT), OPT_SET_INT(0, "hard", &reset_type, N_("reset HEAD, index and working tree"), HARD), OPT_SET_INT(0, "merge", &reset_type, N_("reset HEAD, index and working tree"), MERGE), OPT_SET_INT(0, "keep", &reset_type, N_("reset HEAD but keep local changes"), KEEP), OPT_BOOL('p', "patch", &patch_mode, N_("select hunks interactively")), OPT_END() }; git_config(git_default_config, NULL); argc = parse_options(argc, argv, prefix, options, git_reset_usage, PARSE_OPT_KEEP_DASHDASH); pathspec = parse_args(argv, prefix, &rev); unborn = !strcmp(rev, "HEAD") && get_sha1("HEAD", sha1); if (unborn) { /* reset on unborn branch: treat as reset to empty tree */ hashcpy(sha1, EMPTY_TREE_SHA1_BIN); } else if (!pathspec) { struct commit *commit; if (get_sha1_committish(rev, sha1)) die(_("Failed to resolve '%s' as a valid revision."), rev); commit = lookup_commit_reference(sha1); if (!commit) die(_("Could not parse object '%s'."), rev); hashcpy(sha1, commit->object.sha1); } else { struct tree *tree; if (get_sha1_treeish(rev, sha1)) die(_("Failed to resolve '%s' as a valid tree."), rev); tree = parse_tree_indirect(sha1); if (!tree) die(_("Could not parse object '%s'."), rev); hashcpy(sha1, tree->object.sha1); } if (patch_mode) { if (reset_type != NONE) die(_("--patch is incompatible with --{hard,mixed,soft}")); return run_add_interactive(sha1_to_hex(sha1), "--patch=reset", pathspec); } /* git reset tree [--] paths... can be used to * load chosen paths from the tree into the index without * affecting the working tree nor HEAD. */ if (pathspec) { if (reset_type == MIXED) warning(_("--mixed with paths is deprecated; use 'git reset -- <paths>' instead.")); else if (reset_type != NONE) die(_("Cannot do %s reset with paths."), _(reset_type_names[reset_type])); } if (reset_type == NONE) reset_type = MIXED; /* by default */ if (reset_type != SOFT && reset_type != MIXED) setup_work_tree(); if (reset_type == MIXED && is_bare_repository()) die(_("%s reset is not allowed in a bare repository"), _(reset_type_names[reset_type])); /* Soft reset does not touch the index file nor the working tree * at all, but requires them in a good order. Other resets reset * the index file to the tree object we are switching to. */ if (reset_type == SOFT || reset_type == KEEP) die_if_unmerged_cache(reset_type); if (reset_type != SOFT) { struct lock_file *lock = xcalloc(1, sizeof(struct lock_file)); int newfd = hold_locked_index(lock, 1); if (reset_type == MIXED) { if (read_from_tree(pathspec, sha1)) return 1; } else { int err = reset_index(sha1, reset_type, quiet); if (reset_type == KEEP && !err) err = reset_index(sha1, MIXED, quiet); if (err) die(_("Could not reset index file to revision '%s'."), rev); } if (reset_type == MIXED) { /* Report what has not been updated. */ int flags = quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN; refresh_index(&the_index, flags, NULL, NULL, _("Unstaged changes after reset:")); } if (write_cache(newfd, active_cache, active_nr) || commit_locked_index(lock)) die(_("Could not write new index file.")); } if (!pathspec && !unborn) { /* Any resets without paths update HEAD to the head being * switched to, saving the previous head in ORIG_HEAD before. */ update_ref_status = update_refs(rev, sha1); if (reset_type == HARD && !update_ref_status && !quiet) print_new_head_line(lookup_commit_reference(sha1)); } if (!pathspec) remove_branch_state(); return update_ref_status; }
static int read_code(LHANewDecoder *decoder) { return read_from_tree(&decoder->bit_stream_reader, decoder->code_tree); }
static int read_code_table(LHANewDecoder *decoder) { int i, j, n, skip_count, code; uint8_t code_lengths[NUM_CODES]; // How many codes? n = read_bits(&decoder->bit_stream_reader, 9); if (n < 0) { return 0; } // n=0 implies a single code of zero length; all inputs // decode to the same code. if (n == 0) { code = read_bits(&decoder->bit_stream_reader, 9); if (code < 0) { return 0; } set_tree_single(decoder->code_tree, code); return 1; } if (n > NUM_CODES) { n = NUM_CODES; } // Read the length of each code. // The lengths are encoded using the temp-table previously read; // offset_tree is reused temporarily to hold it. i = 0; while (i < n) { code = read_from_tree(&decoder->bit_stream_reader, decoder->offset_tree); if (code < 0) { return 0; } // The code that was read can have different meanings. // If in the range 0-2, it indicates that a number of // codes are unused and should be skipped over. // Values greater than two represent a frequency count. if (code <= 2) { skip_count = read_skip_count(decoder, code); if (skip_count < 0) { return 0; } for (j = 0; j < skip_count && i < n; ++j) { code_lengths[i] = 0; ++i; } } else { code_lengths[i] = code - 2; ++i; } } build_tree(decoder->code_tree, NUM_CODES * 2, code_lengths, n); return 1; }
int cmd_reset(int argc, const char **argv, const char *prefix) { int i = 0, reset_type = NONE, update_ref_status = 0, quiet = 0; const char *rev = "HEAD"; unsigned char sha1[20], *orig = NULL, sha1_orig[20], *old_orig = NULL, sha1_old_orig[20]; struct commit *commit; char *reflog_action, msg[1024]; const struct option options[] = { OPT_SET_INT(0, "mixed", &reset_type, "reset HEAD and index", MIXED), OPT_SET_INT(0, "soft", &reset_type, "reset only HEAD", SOFT), OPT_SET_INT(0, "hard", &reset_type, "reset HEAD, index and working tree", HARD), OPT_BOOLEAN('q', NULL, &quiet, "disable showing new HEAD in hard reset and progress message"), OPT_END() }; git_config(git_default_config, NULL); argc = parse_options(argc, argv, options, git_reset_usage, PARSE_OPT_KEEP_DASHDASH); reflog_action = args_to_str(argv); setenv("GIT_REFLOG_ACTION", reflog_action, 0); /* * Possible arguments are: * * git reset [-opts] <rev> <paths>... * git reset [-opts] <rev> -- <paths>... * git reset [-opts] -- <paths>... * git reset [-opts] <paths>... * * At this point, argv[i] points immediately after [-opts]. */ if (i < argc) { if (!strcmp(argv[i], "--")) { i++; /* reset to HEAD, possibly with paths */ } else if (i + 1 < argc && !strcmp(argv[i+1], "--")) { rev = argv[i]; i += 2; } /* * Otherwise, argv[i] could be either <rev> or <paths> and * has to be unambigous. */ else if (!get_sha1(argv[i], sha1)) { /* * Ok, argv[i] looks like a rev; it should not * be a filename. */ verify_non_filename(prefix, argv[i]); rev = argv[i++]; } else { /* Otherwise we treat this as a filename */ verify_filename(prefix, argv[i]); } } if (get_sha1(rev, sha1)) die("Failed to resolve '%s' as a valid ref.", rev); commit = lookup_commit_reference(sha1); if (!commit) die("Could not parse object '%s'.", rev); hashcpy(sha1, commit->object.sha1); /* git reset tree [--] paths... can be used to * load chosen paths from the tree into the index without * affecting the working tree nor HEAD. */ if (i < argc) { if (reset_type == MIXED) warning("--mixed option is deprecated with paths."); else if (reset_type != NONE) die("Cannot do %s reset with paths.", reset_type_names[reset_type]); return read_from_tree(prefix, argv + i, sha1, quiet ? REFRESH_QUIET : REFRESH_SAY_CHANGED); } if (reset_type == NONE) reset_type = MIXED; /* by default */ if (reset_type == HARD && is_bare_repository()) die("hard reset makes no sense in a bare repository"); /* Soft reset does not touch the index file nor the working tree * at all, but requires them in a good order. Other resets reset * the index file to the tree object we are switching to. */ if (reset_type == SOFT) { if (is_merge() || read_cache() < 0 || unmerged_cache()) die("Cannot do a soft reset in the middle of a merge."); } else if (reset_index_file(sha1, (reset_type == HARD), quiet)) die("Could not reset index file to revision '%s'.", rev); /* Any resets update HEAD to the head being switched to, * saving the previous head in ORIG_HEAD before. */ if (!get_sha1("ORIG_HEAD", sha1_old_orig)) old_orig = sha1_old_orig; if (!get_sha1("HEAD", sha1_orig)) { orig = sha1_orig; prepend_reflog_action("updating ORIG_HEAD", msg, sizeof(msg)); update_ref(msg, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR); } else if (old_orig) delete_ref("ORIG_HEAD", old_orig); prepend_reflog_action("updating HEAD", msg, sizeof(msg)); update_ref_status = update_ref(msg, "HEAD", sha1, orig, 0, MSG_ON_ERR); switch (reset_type) { case HARD: if (!update_ref_status && !quiet) print_new_head_line(commit); break; case SOFT: /* Nothing else to do. */ break; case MIXED: /* Report what has not been updated. */ update_index_refresh(0, NULL, quiet ? REFRESH_QUIET : REFRESH_SAY_CHANGED); break; } remove_branch_state(); free(reflog_action); return update_ref_status; }
int cmd_reset(int argc, const char **argv, const char *prefix) { int i = 0, reset_type = NONE, update_ref_status = 0, quiet = 0; int patch_mode = 0; const char *rev = "HEAD"; unsigned char sha1[20], *orig = NULL, sha1_orig[20], *old_orig = NULL, sha1_old_orig[20]; struct commit *commit; struct strbuf msg = STRBUF_INIT; const struct option options[] = { OPT__QUIET(&quiet, "be quiet, only report errors"), OPT_SET_INT(0, "mixed", &reset_type, "reset HEAD and index", MIXED), OPT_SET_INT(0, "soft", &reset_type, "reset only HEAD", SOFT), OPT_SET_INT(0, "hard", &reset_type, "reset HEAD, index and working tree", HARD), OPT_SET_INT(0, "merge", &reset_type, "reset HEAD, index and working tree", MERGE), OPT_SET_INT(0, "keep", &reset_type, "reset HEAD but keep local changes", KEEP), OPT_BOOLEAN('p', "patch", &patch_mode, "select hunks interactively"), OPT_END() }; git_config(git_default_config, NULL); argc = parse_options(argc, argv, prefix, options, git_reset_usage, PARSE_OPT_KEEP_DASHDASH); /* * Possible arguments are: * * git reset [-opts] <rev> <paths>... * git reset [-opts] <rev> -- <paths>... * git reset [-opts] -- <paths>... * git reset [-opts] <paths>... * * At this point, argv[i] points immediately after [-opts]. */ if (i < argc) { if (!strcmp(argv[i], "--")) { i++; /* reset to HEAD, possibly with paths */ } else if (i + 1 < argc && !strcmp(argv[i+1], "--")) { rev = argv[i]; i += 2; } /* * Otherwise, argv[i] could be either <rev> or <paths> and * has to be unambiguous. */ else if (!get_sha1(argv[i], sha1)) { /* * Ok, argv[i] looks like a rev; it should not * be a filename. */ verify_non_filename(prefix, argv[i]); rev = argv[i++]; } else { /* Otherwise we treat this as a filename */ verify_filename(prefix, argv[i]); } } if (get_sha1(rev, sha1)) die(_("Failed to resolve '%s' as a valid ref."), rev); commit = lookup_commit_reference(sha1); if (!commit) die(_("Could not parse object '%s'."), rev); hashcpy(sha1, commit->object.sha1); if (patch_mode) { if (reset_type != NONE) die(_("--patch is incompatible with --{hard,mixed,soft}")); return interactive_reset(rev, argv + i, prefix); } /* git reset tree [--] paths... can be used to * load chosen paths from the tree into the index without * affecting the working tree nor HEAD. */ if (i < argc) { if (reset_type == MIXED) warning(_("--mixed with paths is deprecated; use 'git reset -- <paths>' instead.")); else if (reset_type != NONE) die(_("Cannot do %s reset with paths."), _(reset_type_names[reset_type])); return read_from_tree(prefix, argv + i, sha1, quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN); } if (reset_type == NONE) reset_type = MIXED; /* by default */ if (reset_type != SOFT && reset_type != MIXED) setup_work_tree(); if (reset_type == MIXED && is_bare_repository()) die(_("%s reset is not allowed in a bare repository"), _(reset_type_names[reset_type])); /* Soft reset does not touch the index file nor the working tree * at all, but requires them in a good order. Other resets reset * the index file to the tree object we are switching to. */ if (reset_type == SOFT) die_if_unmerged_cache(reset_type); else { int err; if (reset_type == KEEP) die_if_unmerged_cache(reset_type); err = reset_index_file(sha1, reset_type, quiet); if (reset_type == KEEP) err = err || reset_index_file(sha1, MIXED, quiet); if (err) die(_("Could not reset index file to revision '%s'."), rev); } /* Any resets update HEAD to the head being switched to, * saving the previous head in ORIG_HEAD before. */ if (!get_sha1("ORIG_HEAD", sha1_old_orig)) old_orig = sha1_old_orig; if (!get_sha1("HEAD", sha1_orig)) { orig = sha1_orig; set_reflog_message(&msg, "updating ORIG_HEAD", NULL); update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR); } else if (old_orig) delete_ref("ORIG_HEAD", old_orig, 0); set_reflog_message(&msg, "updating HEAD", rev); update_ref_status = update_ref(msg.buf, "HEAD", sha1, orig, 0, MSG_ON_ERR); switch (reset_type) { case HARD: if (!update_ref_status && !quiet) print_new_head_line(commit); break; case SOFT: /* Nothing else to do. */ break; case MIXED: /* Report what has not been updated. */ update_index_refresh(0, NULL, quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN); break; } remove_branch_state(); strbuf_release(&msg); return update_ref_status; }
int cmd_reset(int argc, const char **argv, const char *prefix) { int reset_type = NONE, update_ref_status = 0, quiet = 0; int patch_mode = 0, nul_term_line = 0, read_from_stdin = 0, unborn; char **stdin_paths = NULL; int stdin_nr = 0, stdin_alloc = 0; const char *rev; struct object_id oid; struct pathspec pathspec; int intent_to_add = 0; const struct option options[] = { OPT__QUIET(&quiet, N_("be quiet, only report errors")), OPT_SET_INT(0, "mixed", &reset_type, N_("reset HEAD and index"), MIXED), OPT_SET_INT(0, "soft", &reset_type, N_("reset only HEAD"), SOFT), OPT_SET_INT(0, "hard", &reset_type, N_("reset HEAD, index and working tree"), HARD), OPT_SET_INT(0, "merge", &reset_type, N_("reset HEAD, index and working tree"), MERGE), OPT_SET_INT(0, "keep", &reset_type, N_("reset HEAD but keep local changes"), KEEP), { OPTION_CALLBACK, 0, "recurse-submodules", NULL, "reset", "control recursive updating of submodules", PARSE_OPT_OPTARG, option_parse_recurse_submodules_worktree_updater }, OPT_BOOL('p', "patch", &patch_mode, N_("select hunks interactively")), OPT_BOOL('N', "intent-to-add", &intent_to_add, N_("record only the fact that removed paths will be added later")), OPT_BOOL('z', NULL, &nul_term_line, N_("EXPERIMENTAL: paths are separated with NUL character")), OPT_BOOL(0, "stdin", &read_from_stdin, N_("EXPERIMENTAL: read paths from <stdin>")), OPT_END() }; git_config(git_reset_config, NULL); argc = parse_options(argc, argv, prefix, options, git_reset_usage, PARSE_OPT_KEEP_DASHDASH); parse_args(&pathspec, argv, prefix, patch_mode, &rev); if (read_from_stdin) { strbuf_getline_fn getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf; int flags = PATHSPEC_PREFER_FULL; struct strbuf buf = STRBUF_INIT; struct strbuf unquoted = STRBUF_INIT; if (patch_mode) die(_("--stdin is incompatible with --patch")); if (pathspec.nr) die(_("--stdin is incompatible with path arguments")); while (getline_fn(&buf, stdin) != EOF) { if (!nul_term_line && buf.buf[0] == '"') { strbuf_reset(&unquoted); if (unquote_c_style(&unquoted, buf.buf, NULL)) die(_("line is badly quoted")); strbuf_swap(&buf, &unquoted); } ALLOC_GROW(stdin_paths, stdin_nr + 1, stdin_alloc); stdin_paths[stdin_nr++] = xstrdup(buf.buf); strbuf_reset(&buf); } strbuf_release(&unquoted); strbuf_release(&buf); ALLOC_GROW(stdin_paths, stdin_nr + 1, stdin_alloc); stdin_paths[stdin_nr++] = NULL; flags |= PATHSPEC_LITERAL_PATH; parse_pathspec(&pathspec, 0, flags, prefix, (const char **)stdin_paths); } else if (nul_term_line) die(_("-z requires --stdin")); unborn = !strcmp(rev, "HEAD") && get_oid("HEAD", &oid); if (unborn) { /* reset on unborn branch: treat as reset to empty tree */ hashcpy(oid.hash, EMPTY_TREE_SHA1_BIN); } else if (!pathspec.nr) { struct commit *commit; if (get_oid_committish(rev, &oid)) die(_("Failed to resolve '%s' as a valid revision."), rev); commit = lookup_commit_reference(&oid); if (!commit) die(_("Could not parse object '%s'."), rev); oidcpy(&oid, &commit->object.oid); } else { struct tree *tree; if (get_oid_treeish(rev, &oid)) die(_("Failed to resolve '%s' as a valid tree."), rev); tree = parse_tree_indirect(&oid); if (!tree) die(_("Could not parse object '%s'."), rev); oidcpy(&oid, &tree->object.oid); } if (patch_mode) { if (reset_type != NONE) die(_("--patch is incompatible with --{hard,mixed,soft}")); return run_add_interactive(rev, "--patch=reset", &pathspec); } /* git reset tree [--] paths... can be used to * load chosen paths from the tree into the index without * affecting the working tree nor HEAD. */ if (pathspec.nr) { if (reset_type == MIXED) warning(_("--mixed with paths is deprecated; use 'git reset -- <paths>' instead.")); else if (reset_type != NONE) die(_("Cannot do %s reset with paths."), _(reset_type_names[reset_type])); } if (reset_type == NONE) reset_type = MIXED; /* by default */ if (reset_type != SOFT && (reset_type != MIXED || get_git_work_tree())) setup_work_tree(); if (reset_type == MIXED && is_bare_repository()) die(_("%s reset is not allowed in a bare repository"), _(reset_type_names[reset_type])); if (intent_to_add && reset_type != MIXED) die(_("-N can only be used with --mixed")); /* Soft reset does not touch the index file nor the working tree * at all, but requires them in a good order. Other resets reset * the index file to the tree object we are switching to. */ if (reset_type == SOFT || reset_type == KEEP) die_if_unmerged_cache(reset_type); if (reset_type != SOFT) { struct lock_file lock = LOCK_INIT; hold_locked_index(&lock, LOCK_DIE_ON_ERROR); if (reset_type == MIXED) { int flags = quiet ? REFRESH_QUIET : REFRESH_IN_PORCELAIN; if (read_from_tree(&pathspec, &oid, intent_to_add)) return 1; if (get_git_work_tree()) refresh_index(&the_index, flags, NULL, NULL, _("Unstaged changes after reset:")); } else { int err = reset_index(&oid, reset_type, quiet); if (reset_type == KEEP && !err) err = reset_index(&oid, MIXED, quiet); if (err) die(_("Could not reset index file to revision '%s'."), rev); } if (write_locked_index(&the_index, &lock, COMMIT_LOCK)) die(_("Could not write new index file.")); } if (!pathspec.nr && !unborn) { /* Any resets without paths update HEAD to the head being * switched to, saving the previous head in ORIG_HEAD before. */ update_ref_status = reset_refs(rev, &oid); if (reset_type == HARD && !update_ref_status && !quiet) print_new_head_line(lookup_commit_reference(&oid)); } if (!pathspec.nr) remove_branch_state(); if (stdin_paths) { while (stdin_nr) free(stdin_paths[--stdin_nr]); free(stdin_paths); } return update_ref_status; }