diff options
| -rw-r--r-- | grep.c | 198 | ||||
| -rw-r--r-- | grep.h | 22 |
2 files changed, 186 insertions, 34 deletions
@@ -837,13 +837,13 @@ pthread_mutex_t grep_read_mutex; #define grep_attr_unlock() #endif -static int match_funcname(struct grep_opt *opt, const char *name, char *bol, char *eol) +static int match_funcname(struct grep_opt *opt, struct grep_source *gs, char *bol, char *eol) { xdemitconf_t *xecfg = opt->priv; if (xecfg && !xecfg->find_func) { struct userdiff_driver *drv; grep_attr_lock(); - drv = userdiff_find_by_path(name); + drv = userdiff_find_by_path(gs->name); grep_attr_unlock(); if (drv && drv->funcname.pattern) { const struct userdiff_funcname *pe = &drv->funcname; @@ -866,33 +866,33 @@ static int match_funcname(struct grep_opt *opt, const char *name, char *bol, cha return 0; } -static void show_funcname_line(struct grep_opt *opt, const char *name, - char *buf, char *bol, unsigned lno) +static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs, + char *bol, unsigned lno) { - while (bol > buf) { + while (bol > gs->buf) { char *eol = --bol; - while (bol > buf && bol[-1] != '\n') + while (bol > gs->buf && bol[-1] != '\n') bol--; lno--; if (lno <= opt->last_shown) break; - if (match_funcname(opt, name, bol, eol)) { - show_line(opt, bol, eol, name, lno, '='); + if (match_funcname(opt, gs, bol, eol)) { + show_line(opt, bol, eol, gs->name, lno, '='); break; } } } -static void show_pre_context(struct grep_opt *opt, const char *name, char *buf, +static void show_pre_context(struct grep_opt *opt, struct grep_source *gs, char *bol, char *end, unsigned lno) { unsigned cur = lno, from = 1, funcname_lno = 0; int funcname_needed = !!opt->funcname; - if (opt->funcbody && !match_funcname(opt, name, bol, end)) + if (opt->funcbody && !match_funcname(opt, gs, bol, end)) funcname_needed = 2; if (opt->pre_context < lno) @@ -901,14 +901,14 @@ static void show_pre_context(struct grep_opt *opt, const char *name, char *buf, from = opt->last_shown + 1; /* Rewind. */ - while (bol > buf && + while (bol > gs->buf && cur > (funcname_needed == 2 ? opt->last_shown + 1 : from)) { char *eol = --bol; - while (bol > buf && bol[-1] != '\n') + while (bol > gs->buf && bol[-1] != '\n') bol--; cur--; - if (funcname_needed && match_funcname(opt, name, bol, eol)) { + if (funcname_needed && match_funcname(opt, gs, bol, eol)) { funcname_lno = cur; funcname_needed = 0; } @@ -916,7 +916,7 @@ static void show_pre_context(struct grep_opt *opt, const char *name, char *buf, /* We need to look even further back to find a function signature. */ if (opt->funcname && funcname_needed) - show_funcname_line(opt, name, buf, bol, cur); + show_funcname_line(opt, gs, bol, cur); /* Back forward. */ while (cur < lno) { @@ -924,7 +924,7 @@ static void show_pre_context(struct grep_opt *opt, const char *name, char *buf, while (*eol != '\n') eol++; - show_line(opt, bol, eol, name, cur, sign); + show_line(opt, bol, eol, gs->name, cur, sign); bol = eol + 1; cur++; } @@ -991,11 +991,10 @@ static void std_output(struct grep_opt *opt, const void *buf, size_t size) fwrite(buf, size, 1, stdout); } -static int grep_buffer_1(struct grep_opt *opt, const char *name, - char *buf, unsigned long size, int collect_hits) +static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits) { - char *bol = buf; - unsigned long left = size; + char *bol; + unsigned long left; unsigned lno = 1; unsigned last_hit = 0; int binary_match_only = 0; @@ -1023,13 +1022,16 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, } opt->last_shown = 0; + if (grep_source_load(gs) < 0) + return 0; + switch (opt->binary) { case GREP_BINARY_DEFAULT: - if (buffer_is_binary(buf, size)) + if (buffer_is_binary(gs->buf, gs->size)) binary_match_only = 1; break; case GREP_BINARY_NOMATCH: - if (buffer_is_binary(buf, size)) + if (buffer_is_binary(gs->buf, gs->size)) return 0; /* Assume unmatch */ break; case GREP_BINARY_TEXT: @@ -1043,6 +1045,8 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, try_lookahead = should_lookahead(opt); + bol = gs->buf; + left = gs->size; while (left) { char *eol, ch; int hit; @@ -1091,14 +1095,14 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, if (opt->status_only) return 1; if (opt->name_only) { - show_name(opt, name); + show_name(opt, gs->name); return 1; } if (opt->count) goto next_line; if (binary_match_only) { opt->output(opt, "Binary file ", 12); - output_color(opt, name, strlen(name), + output_color(opt, gs->name, strlen(gs->name), opt->color_filename); opt->output(opt, " matches\n", 9); return 1; @@ -1107,23 +1111,23 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, * pre-context lines, we would need to show them. */ if (opt->pre_context || opt->funcbody) - show_pre_context(opt, name, buf, bol, eol, lno); + show_pre_context(opt, gs, bol, eol, lno); else if (opt->funcname) - show_funcname_line(opt, name, buf, bol, lno); - show_line(opt, bol, eol, name, lno, ':'); + show_funcname_line(opt, gs, bol, lno); + show_line(opt, bol, eol, gs->name, lno, ':'); last_hit = lno; if (opt->funcbody) show_function = 1; goto next_line; } - if (show_function && match_funcname(opt, name, bol, eol)) + if (show_function && match_funcname(opt, gs, bol, eol)) show_function = 0; if (show_function || (last_hit && lno <= last_hit + opt->post_context)) { /* If the last hit is within the post context, * we need to show this line. */ - show_line(opt, bol, eol, name, lno, '-'); + show_line(opt, bol, eol, gs->name, lno, '-'); } next_line: @@ -1141,7 +1145,7 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, return 0; if (opt->unmatch_name_only) { /* We did not see any hit, so we want to show this */ - show_name(opt, name); + show_name(opt, gs->name); return 1; } @@ -1155,7 +1159,7 @@ static int grep_buffer_1(struct grep_opt *opt, const char *name, */ if (opt->count && count) { char buf[32]; - output_color(opt, name, strlen(name), opt->color_filename); + output_color(opt, gs->name, strlen(gs->name), opt->color_filename); output_sep(opt, ':'); snprintf(buf, sizeof(buf), "%u\n", count); opt->output(opt, buf, strlen(buf)); @@ -1190,23 +1194,149 @@ static int chk_hit_marker(struct grep_expr *x) } } -int grep_buffer(struct grep_opt *opt, const char *name, char *buf, unsigned long size) +int grep_source(struct grep_opt *opt, struct grep_source *gs) { /* * we do not have to do the two-pass grep when we do not check * buffer-wide "all-match". */ if (!opt->all_match) - return grep_buffer_1(opt, name, buf, size, 0); + return grep_source_1(opt, gs, 0); /* Otherwise the toplevel "or" terms hit a bit differently. * We first clear hit markers from them. */ clr_hit_marker(opt->pattern_expression); - grep_buffer_1(opt, name, buf, size, 1); + grep_source_1(opt, gs, 1); if (!chk_hit_marker(opt->pattern_expression)) return 0; - return grep_buffer_1(opt, name, buf, size, 0); + return grep_source_1(opt, gs, 0); +} + +int grep_buffer(struct grep_opt *opt, const char *name, char *buf, unsigned long size) +{ + struct grep_source gs; + int r; + + grep_source_init(&gs, GREP_SOURCE_BUF, name, NULL); + gs.buf = buf; + gs.size = size; + + r = grep_source(opt, &gs); + + grep_source_clear(&gs); + return r; +} + +void grep_source_init(struct grep_source *gs, enum grep_source_type type, + const char *name, const void *identifier) +{ + gs->type = type; + gs->name = name ? xstrdup(name) : NULL; + gs->buf = NULL; + gs->size = 0; + + switch (type) { + case GREP_SOURCE_FILE: + gs->identifier = xstrdup(identifier); + break; + case GREP_SOURCE_SHA1: + gs->identifier = xmalloc(20); + memcpy(gs->identifier, identifier, 20); + break; + case GREP_SOURCE_BUF: + gs->identifier = NULL; + } +} + +void grep_source_clear(struct grep_source *gs) +{ + free(gs->name); + gs->name = NULL; + free(gs->identifier); + gs->identifier = NULL; + grep_source_clear_data(gs); +} + +void grep_source_clear_data(struct grep_source *gs) +{ + switch (gs->type) { + case GREP_SOURCE_FILE: + case GREP_SOURCE_SHA1: + free(gs->buf); + gs->buf = NULL; + gs->size = 0; + break; + case GREP_SOURCE_BUF: + /* leave user-provided buf intact */ + break; + } +} + +static int grep_source_load_sha1(struct grep_source *gs) +{ + enum object_type type; + + grep_read_lock(); + gs->buf = read_sha1_file(gs->identifier, &type, &gs->size); + grep_read_unlock(); + + if (!gs->buf) + return error(_("'%s': unable to read %s"), + gs->name, + sha1_to_hex(gs->identifier)); + return 0; +} + +static int grep_source_load_file(struct grep_source *gs) +{ + const char *filename = gs->identifier; + struct stat st; + char *data; + size_t size; + int i; + + if (lstat(filename, &st) < 0) { + err_ret: + if (errno != ENOENT) + error(_("'%s': %s"), filename, strerror(errno)); + return -1; + } + if (!S_ISREG(st.st_mode)) + return -1; + size = xsize_t(st.st_size); + i = open(filename, O_RDONLY); + if (i < 0) + goto err_ret; + data = xmalloc(size + 1); + if (st.st_size != read_in_full(i, data, size)) { + error(_("'%s': short read %s"), filename, strerror(errno)); + close(i); + free(data); + return -1; + } + close(i); + data[size] = 0; + + gs->buf = data; + gs->size = size; + return 0; +} + +int grep_source_load(struct grep_source *gs) +{ + if (gs->buf) + return 0; + + switch (gs->type) { + case GREP_SOURCE_FILE: + return grep_source_load_file(gs); + case GREP_SOURCE_SHA1: + return grep_source_load_sha1(gs); + case GREP_SOURCE_BUF: + return gs->buf ? 0 : -1; + } + die("BUG: invalid grep_source type"); } @@ -129,6 +129,28 @@ extern void compile_grep_patterns(struct grep_opt *opt); extern void free_grep_patterns(struct grep_opt *opt); extern int grep_buffer(struct grep_opt *opt, const char *name, char *buf, unsigned long size); +struct grep_source { + char *name; + + enum grep_source_type { + GREP_SOURCE_SHA1, + GREP_SOURCE_FILE, + GREP_SOURCE_BUF, + } type; + void *identifier; + + char *buf; + unsigned long size; +}; + +void grep_source_init(struct grep_source *gs, enum grep_source_type type, + const char *name, const void *identifier); +int grep_source_load(struct grep_source *gs); +void grep_source_clear_data(struct grep_source *gs); +void grep_source_clear(struct grep_source *gs); + +int grep_source(struct grep_opt *opt, struct grep_source *gs); + extern struct grep_opt *grep_opt_dup(const struct grep_opt *opt); extern int grep_threads_ok(const struct grep_opt *opt); |