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![Jeff King](/assets/img/avatar_default.png)
When USE_LIBPCRE2 is not defined, we compile several noop fallbacks. These need to have their parameters annotated to avoid -Wunused-parameter warnings (and obviously we cannot remove the parameters, since the functions must match the non-fallback versions). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2006 lines
49 KiB
C
2006 lines
49 KiB
C
#include "git-compat-util.h"
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#include "config.h"
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#include "gettext.h"
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#include "grep.h"
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#include "hex.h"
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#include "object-store-ll.h"
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#include "pretty.h"
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#include "userdiff.h"
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#include "xdiff-interface.h"
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#include "diff.h"
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#include "diffcore.h"
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#include "commit.h"
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#include "quote.h"
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#include "help.h"
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static int grep_source_load(struct grep_source *gs);
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static int grep_source_is_binary(struct grep_source *gs,
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struct index_state *istate);
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static void std_output(struct grep_opt *opt UNUSED, const void *buf, size_t size)
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{
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fwrite(buf, size, 1, stdout);
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}
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static const char *color_grep_slots[] = {
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[GREP_COLOR_CONTEXT] = "context",
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[GREP_COLOR_FILENAME] = "filename",
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[GREP_COLOR_FUNCTION] = "function",
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[GREP_COLOR_LINENO] = "lineNumber",
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[GREP_COLOR_COLUMNNO] = "column",
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[GREP_COLOR_MATCH_CONTEXT] = "matchContext",
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[GREP_COLOR_MATCH_SELECTED] = "matchSelected",
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[GREP_COLOR_SELECTED] = "selected",
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[GREP_COLOR_SEP] = "separator",
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};
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static int parse_pattern_type_arg(const char *opt, const char *arg)
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{
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if (!strcmp(arg, "default"))
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return GREP_PATTERN_TYPE_UNSPECIFIED;
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else if (!strcmp(arg, "basic"))
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return GREP_PATTERN_TYPE_BRE;
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else if (!strcmp(arg, "extended"))
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return GREP_PATTERN_TYPE_ERE;
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else if (!strcmp(arg, "fixed"))
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return GREP_PATTERN_TYPE_FIXED;
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else if (!strcmp(arg, "perl"))
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return GREP_PATTERN_TYPE_PCRE;
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die("bad %s argument: %s", opt, arg);
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}
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define_list_config_array_extra(color_grep_slots, {"match"});
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/*
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* Read the configuration file once and store it in
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* the grep_defaults template.
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*/
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int grep_config(const char *var, const char *value,
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const struct config_context *ctx, void *cb)
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{
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struct grep_opt *opt = cb;
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const char *slot;
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if (userdiff_config(var, value) < 0)
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return -1;
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if (!strcmp(var, "grep.extendedregexp")) {
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opt->extended_regexp_option = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "grep.patterntype")) {
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opt->pattern_type_option = parse_pattern_type_arg(var, value);
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return 0;
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}
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if (!strcmp(var, "grep.linenumber")) {
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opt->linenum = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "grep.column")) {
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opt->columnnum = git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "grep.fullname")) {
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opt->relative = !git_config_bool(var, value);
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return 0;
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}
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if (!strcmp(var, "color.grep"))
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opt->color = git_config_colorbool(var, value);
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if (!strcmp(var, "color.grep.match")) {
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if (grep_config("color.grep.matchcontext", value, ctx, cb) < 0)
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return -1;
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if (grep_config("color.grep.matchselected", value, ctx, cb) < 0)
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return -1;
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} else if (skip_prefix(var, "color.grep.", &slot)) {
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int i = LOOKUP_CONFIG(color_grep_slots, slot);
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char *color;
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if (i < 0)
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return -1;
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color = opt->colors[i];
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if (!value)
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return config_error_nonbool(var);
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return color_parse(value, color);
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}
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return 0;
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}
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void grep_init(struct grep_opt *opt, struct repository *repo)
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{
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struct grep_opt blank = GREP_OPT_INIT;
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memcpy(opt, &blank, sizeof(*opt));
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opt->repo = repo;
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opt->pattern_tail = &opt->pattern_list;
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opt->header_tail = &opt->header_list;
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}
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static struct grep_pat *create_grep_pat(const char *pat, size_t patlen,
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const char *origin, int no,
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enum grep_pat_token t,
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enum grep_header_field field)
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{
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struct grep_pat *p = xcalloc(1, sizeof(*p));
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p->pattern = xmemdupz(pat, patlen);
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p->patternlen = patlen;
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p->origin = origin;
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p->no = no;
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p->token = t;
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p->field = field;
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return p;
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}
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static void do_append_grep_pat(struct grep_pat ***tail, struct grep_pat *p)
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{
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**tail = p;
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*tail = &p->next;
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p->next = NULL;
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switch (p->token) {
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case GREP_PATTERN: /* atom */
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case GREP_PATTERN_HEAD:
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case GREP_PATTERN_BODY:
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for (;;) {
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struct grep_pat *new_pat;
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size_t len = 0;
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char *cp = p->pattern + p->patternlen, *nl = NULL;
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while (++len <= p->patternlen) {
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if (*(--cp) == '\n') {
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nl = cp;
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break;
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}
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}
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if (!nl)
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break;
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new_pat = create_grep_pat(nl + 1, len - 1, p->origin,
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p->no, p->token, p->field);
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new_pat->next = p->next;
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if (!p->next)
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*tail = &new_pat->next;
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p->next = new_pat;
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*nl = '\0';
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p->patternlen -= len;
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}
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break;
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default:
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break;
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}
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}
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void append_header_grep_pattern(struct grep_opt *opt,
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enum grep_header_field field, const char *pat)
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{
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struct grep_pat *p = create_grep_pat(pat, strlen(pat), "header", 0,
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GREP_PATTERN_HEAD, field);
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if (field == GREP_HEADER_REFLOG)
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opt->use_reflog_filter = 1;
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do_append_grep_pat(&opt->header_tail, p);
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}
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void append_grep_pattern(struct grep_opt *opt, const char *pat,
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const char *origin, int no, enum grep_pat_token t)
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{
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append_grep_pat(opt, pat, strlen(pat), origin, no, t);
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}
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void append_grep_pat(struct grep_opt *opt, const char *pat, size_t patlen,
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const char *origin, int no, enum grep_pat_token t)
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{
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struct grep_pat *p = create_grep_pat(pat, patlen, origin, no, t, 0);
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do_append_grep_pat(&opt->pattern_tail, p);
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}
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struct grep_opt *grep_opt_dup(const struct grep_opt *opt)
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{
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struct grep_pat *pat;
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struct grep_opt *ret = xmalloc(sizeof(struct grep_opt));
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*ret = *opt;
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ret->pattern_list = NULL;
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ret->pattern_tail = &ret->pattern_list;
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for(pat = opt->pattern_list; pat != NULL; pat = pat->next)
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{
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if(pat->token == GREP_PATTERN_HEAD)
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append_header_grep_pattern(ret, pat->field,
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pat->pattern);
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else
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append_grep_pat(ret, pat->pattern, pat->patternlen,
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pat->origin, pat->no, pat->token);
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}
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return ret;
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}
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static NORETURN void compile_regexp_failed(const struct grep_pat *p,
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const char *error)
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{
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char where[1024];
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if (p->no)
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xsnprintf(where, sizeof(where), "In '%s' at %d, ", p->origin, p->no);
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else if (p->origin)
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xsnprintf(where, sizeof(where), "%s, ", p->origin);
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else
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where[0] = 0;
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die("%s'%s': %s", where, p->pattern, error);
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}
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static int is_fixed(const char *s, size_t len)
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{
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size_t i;
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for (i = 0; i < len; i++) {
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if (is_regex_special(s[i]))
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return 0;
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}
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return 1;
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}
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#ifdef USE_LIBPCRE2
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#define GREP_PCRE2_DEBUG_MALLOC 0
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static void *pcre2_malloc(PCRE2_SIZE size, MAYBE_UNUSED void *memory_data)
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{
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void *pointer = malloc(size);
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#if GREP_PCRE2_DEBUG_MALLOC
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static int count = 1;
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fprintf(stderr, "PCRE2:%p -> #%02d: alloc(%lu)\n", pointer, count++, size);
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#endif
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return pointer;
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}
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static void pcre2_free(void *pointer, MAYBE_UNUSED void *memory_data)
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{
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#if GREP_PCRE2_DEBUG_MALLOC
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static int count = 1;
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if (pointer)
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fprintf(stderr, "PCRE2:%p -> #%02d: free()\n", pointer, count++);
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#endif
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free(pointer);
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}
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static int pcre2_jit_functional(void)
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{
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static int jit_working = -1;
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pcre2_code *code;
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size_t off;
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int err;
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if (jit_working != -1)
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return jit_working;
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/*
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* Try to JIT compile a simple pattern to probe if the JIT is
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* working in general. It might fail for systems where creating
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* memory mappings for runtime code generation is restricted.
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*/
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code = pcre2_compile((PCRE2_SPTR)".", 1, 0, &err, &off, NULL);
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if (!code)
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return 0;
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jit_working = pcre2_jit_compile(code, PCRE2_JIT_COMPLETE) == 0;
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pcre2_code_free(code);
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return jit_working;
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}
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static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
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{
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int error;
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PCRE2_UCHAR errbuf[256];
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PCRE2_SIZE erroffset;
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int options = PCRE2_MULTILINE;
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int jitret;
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int patinforet;
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size_t jitsizearg;
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int literal = !opt->ignore_case && (p->fixed || p->is_fixed);
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/*
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* Call pcre2_general_context_create() before calling any
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* other pcre2_*(). It sets up our malloc()/free() functions
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* with which everything else is allocated.
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*/
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p->pcre2_general_context = pcre2_general_context_create(
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pcre2_malloc, pcre2_free, NULL);
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if (!p->pcre2_general_context)
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die("Couldn't allocate PCRE2 general context");
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if (opt->ignore_case) {
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if (!opt->ignore_locale && has_non_ascii(p->pattern)) {
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p->pcre2_tables = pcre2_maketables(p->pcre2_general_context);
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p->pcre2_compile_context = pcre2_compile_context_create(p->pcre2_general_context);
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pcre2_set_character_tables(p->pcre2_compile_context,
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p->pcre2_tables);
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}
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options |= PCRE2_CASELESS;
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}
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if (!opt->ignore_locale && is_utf8_locale() && !literal)
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options |= (PCRE2_UTF | PCRE2_UCP | PCRE2_MATCH_INVALID_UTF);
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#ifndef GIT_PCRE2_VERSION_10_35_OR_HIGHER
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/*
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* Work around a JIT bug related to invalid Unicode character handling
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* fixed in 10.35:
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* https://github.com/PCRE2Project/pcre2/commit/c21bd977547d
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*/
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options &= ~PCRE2_UCP;
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#endif
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#ifndef GIT_PCRE2_VERSION_10_36_OR_HIGHER
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/* Work around https://bugs.exim.org/show_bug.cgi?id=2642 fixed in 10.36 */
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if (PCRE2_MATCH_INVALID_UTF && options & (PCRE2_UTF | PCRE2_CASELESS))
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options |= PCRE2_NO_START_OPTIMIZE;
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#endif
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p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
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p->patternlen, options, &error, &erroffset,
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p->pcre2_compile_context);
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if (p->pcre2_pattern) {
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p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, p->pcre2_general_context);
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if (!p->pcre2_match_data)
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die("Couldn't allocate PCRE2 match data");
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} else {
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pcre2_get_error_message(error, errbuf, sizeof(errbuf));
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compile_regexp_failed(p, (const char *)&errbuf);
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}
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pcre2_config(PCRE2_CONFIG_JIT, &p->pcre2_jit_on);
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if (p->pcre2_jit_on) {
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jitret = pcre2_jit_compile(p->pcre2_pattern, PCRE2_JIT_COMPLETE);
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if (jitret == PCRE2_ERROR_NOMEMORY && !pcre2_jit_functional()) {
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/*
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* Even though pcre2_config(PCRE2_CONFIG_JIT, ...)
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* indicated JIT support, the library might still
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* fail to generate JIT code for various reasons,
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* e.g. when SELinux's 'deny_execmem' or PaX's
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* MPROTECT prevent creating W|X memory mappings.
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*
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* Instead of faling hard, fall back to interpreter
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* mode, just as if the pattern was prefixed with
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* '(*NO_JIT)'.
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*/
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p->pcre2_jit_on = 0;
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return;
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} else if (jitret) {
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int need_clip = p->patternlen > 64;
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int clip_len = need_clip ? 64 : p->patternlen;
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die("Couldn't JIT the PCRE2 pattern '%.*s'%s, got '%d'%s",
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clip_len, p->pattern, need_clip ? "..." : "", jitret,
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pcre2_jit_functional()
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? "\nPerhaps prefix (*NO_JIT) to your pattern?"
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: "");
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}
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/*
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* The pcre2_config(PCRE2_CONFIG_JIT, ...) call just
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* tells us whether the library itself supports JIT,
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* but to see whether we're going to be actually using
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* JIT we need to extract PCRE2_INFO_JITSIZE from the
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* pattern *after* we do pcre2_jit_compile() above.
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*
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* This is because if the pattern contains the
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* (*NO_JIT) verb (see pcre2syntax(3))
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* pcre2_jit_compile() will exit early with 0. If we
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* then proceed to call pcre2_jit_match() further down
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* the line instead of pcre2_match() we'll either
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* segfault (pre PCRE 10.31) or run into a fatal error
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* (post PCRE2 10.31)
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*/
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patinforet = pcre2_pattern_info(p->pcre2_pattern, PCRE2_INFO_JITSIZE, &jitsizearg);
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if (patinforet)
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BUG("pcre2_pattern_info() failed: %d", patinforet);
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if (jitsizearg == 0) {
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p->pcre2_jit_on = 0;
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return;
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}
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}
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}
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static int pcre2match(struct grep_pat *p, const char *line, const char *eol,
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regmatch_t *match, int eflags)
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{
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int ret, flags = 0;
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PCRE2_SIZE *ovector;
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PCRE2_UCHAR errbuf[256];
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if (eflags & REG_NOTBOL)
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flags |= PCRE2_NOTBOL;
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if (p->pcre2_jit_on)
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ret = pcre2_jit_match(p->pcre2_pattern, (unsigned char *)line,
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eol - line, 0, flags, p->pcre2_match_data,
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NULL);
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else
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ret = pcre2_match(p->pcre2_pattern, (unsigned char *)line,
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eol - line, 0, flags, p->pcre2_match_data,
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NULL);
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if (ret < 0 && ret != PCRE2_ERROR_NOMATCH) {
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pcre2_get_error_message(ret, errbuf, sizeof(errbuf));
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die("%s failed with error code %d: %s",
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(p->pcre2_jit_on ? "pcre2_jit_match" : "pcre2_match"), ret,
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errbuf);
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}
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if (ret > 0) {
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ovector = pcre2_get_ovector_pointer(p->pcre2_match_data);
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ret = 0;
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match->rm_so = (int)ovector[0];
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match->rm_eo = (int)ovector[1];
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}
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return ret;
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}
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static void free_pcre2_pattern(struct grep_pat *p)
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{
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pcre2_compile_context_free(p->pcre2_compile_context);
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pcre2_code_free(p->pcre2_pattern);
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pcre2_match_data_free(p->pcre2_match_data);
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#ifdef GIT_PCRE2_VERSION_10_34_OR_HIGHER
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pcre2_maketables_free(p->pcre2_general_context, p->pcre2_tables);
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#else
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free((void *)p->pcre2_tables);
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#endif
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pcre2_general_context_free(p->pcre2_general_context);
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}
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#else /* !USE_LIBPCRE2 */
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static void compile_pcre2_pattern(struct grep_pat *p UNUSED,
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const struct grep_opt *opt UNUSED)
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{
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die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE");
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}
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static int pcre2match(struct grep_pat *p UNUSED, const char *line UNUSED,
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const char *eol UNUSED, regmatch_t *match UNUSED,
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int eflags UNUSED)
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{
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return 1;
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}
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static void free_pcre2_pattern(struct grep_pat *p UNUSED)
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{
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}
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static void compile_fixed_regexp(struct grep_pat *p, struct grep_opt *opt)
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{
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|
struct strbuf sb = STRBUF_INIT;
|
|
int err;
|
|
int regflags = 0;
|
|
|
|
basic_regex_quote_buf(&sb, p->pattern);
|
|
if (opt->ignore_case)
|
|
regflags |= REG_ICASE;
|
|
err = regcomp(&p->regexp, sb.buf, regflags);
|
|
strbuf_release(&sb);
|
|
if (err) {
|
|
char errbuf[1024];
|
|
regerror(err, &p->regexp, errbuf, sizeof(errbuf));
|
|
compile_regexp_failed(p, errbuf);
|
|
}
|
|
}
|
|
#endif /* !USE_LIBPCRE2 */
|
|
|
|
static void compile_regexp(struct grep_pat *p, struct grep_opt *opt)
|
|
{
|
|
int err;
|
|
int regflags = REG_NEWLINE;
|
|
|
|
if (opt->pattern_type_option == GREP_PATTERN_TYPE_UNSPECIFIED)
|
|
opt->pattern_type_option = (opt->extended_regexp_option
|
|
? GREP_PATTERN_TYPE_ERE
|
|
: GREP_PATTERN_TYPE_BRE);
|
|
|
|
p->word_regexp = opt->word_regexp;
|
|
p->ignore_case = opt->ignore_case;
|
|
p->fixed = opt->pattern_type_option == GREP_PATTERN_TYPE_FIXED;
|
|
|
|
if (opt->pattern_type_option != GREP_PATTERN_TYPE_PCRE &&
|
|
memchr(p->pattern, 0, p->patternlen))
|
|
die(_("given pattern contains NULL byte (via -f <file>). This is only supported with -P under PCRE v2"));
|
|
|
|
p->is_fixed = is_fixed(p->pattern, p->patternlen);
|
|
#ifdef USE_LIBPCRE2
|
|
if (!p->fixed && !p->is_fixed) {
|
|
const char *no_jit = "(*NO_JIT)";
|
|
const int no_jit_len = strlen(no_jit);
|
|
if (starts_with(p->pattern, no_jit) &&
|
|
is_fixed(p->pattern + no_jit_len,
|
|
p->patternlen - no_jit_len))
|
|
p->is_fixed = 1;
|
|
}
|
|
#endif
|
|
if (p->fixed || p->is_fixed) {
|
|
#ifdef USE_LIBPCRE2
|
|
if (p->is_fixed) {
|
|
compile_pcre2_pattern(p, opt);
|
|
} else {
|
|
/*
|
|
* E.g. t7811-grep-open.sh relies on the
|
|
* pattern being restored.
|
|
*/
|
|
char *old_pattern = p->pattern;
|
|
size_t old_patternlen = p->patternlen;
|
|
struct strbuf sb = STRBUF_INIT;
|
|
|
|
/*
|
|
* There is the PCRE2_LITERAL flag, but it's
|
|
* only in PCRE v2 10.30 and later. Needing to
|
|
* ifdef our way around that and dealing with
|
|
* it + PCRE2_MULTILINE being an error is more
|
|
* complex than just quoting this ourselves.
|
|
*/
|
|
strbuf_add(&sb, "\\Q", 2);
|
|
strbuf_add(&sb, p->pattern, p->patternlen);
|
|
strbuf_add(&sb, "\\E", 2);
|
|
|
|
p->pattern = sb.buf;
|
|
p->patternlen = sb.len;
|
|
compile_pcre2_pattern(p, opt);
|
|
p->pattern = old_pattern;
|
|
p->patternlen = old_patternlen;
|
|
strbuf_release(&sb);
|
|
}
|
|
#else /* !USE_LIBPCRE2 */
|
|
compile_fixed_regexp(p, opt);
|
|
#endif /* !USE_LIBPCRE2 */
|
|
return;
|
|
}
|
|
|
|
if (opt->pattern_type_option == GREP_PATTERN_TYPE_PCRE) {
|
|
compile_pcre2_pattern(p, opt);
|
|
return;
|
|
}
|
|
|
|
if (p->ignore_case)
|
|
regflags |= REG_ICASE;
|
|
if (opt->pattern_type_option == GREP_PATTERN_TYPE_ERE)
|
|
regflags |= REG_EXTENDED;
|
|
err = regcomp(&p->regexp, p->pattern, regflags);
|
|
if (err) {
|
|
char errbuf[1024];
|
|
regerror(err, &p->regexp, errbuf, 1024);
|
|
compile_regexp_failed(p, errbuf);
|
|
}
|
|
}
|
|
|
|
static struct grep_expr *grep_not_expr(struct grep_expr *expr)
|
|
{
|
|
struct grep_expr *z = xcalloc(1, sizeof(*z));
|
|
z->node = GREP_NODE_NOT;
|
|
z->u.unary = expr;
|
|
return z;
|
|
}
|
|
|
|
static struct grep_expr *grep_binexp(enum grep_expr_node kind,
|
|
struct grep_expr *left,
|
|
struct grep_expr *right)
|
|
{
|
|
struct grep_expr *z = xcalloc(1, sizeof(*z));
|
|
z->node = kind;
|
|
z->u.binary.left = left;
|
|
z->u.binary.right = right;
|
|
return z;
|
|
}
|
|
|
|
static struct grep_expr *grep_or_expr(struct grep_expr *left, struct grep_expr *right)
|
|
{
|
|
return grep_binexp(GREP_NODE_OR, left, right);
|
|
}
|
|
|
|
static struct grep_expr *grep_and_expr(struct grep_expr *left, struct grep_expr *right)
|
|
{
|
|
return grep_binexp(GREP_NODE_AND, left, right);
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_or(struct grep_pat **);
|
|
static struct grep_expr *compile_pattern_atom(struct grep_pat **list)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *x;
|
|
|
|
p = *list;
|
|
if (!p)
|
|
return NULL;
|
|
switch (p->token) {
|
|
case GREP_PATTERN: /* atom */
|
|
case GREP_PATTERN_HEAD:
|
|
case GREP_PATTERN_BODY:
|
|
CALLOC_ARRAY(x, 1);
|
|
x->node = GREP_NODE_ATOM;
|
|
x->u.atom = p;
|
|
*list = p->next;
|
|
return x;
|
|
case GREP_OPEN_PAREN:
|
|
*list = p->next;
|
|
x = compile_pattern_or(list);
|
|
if (!*list || (*list)->token != GREP_CLOSE_PAREN)
|
|
die("unmatched parenthesis");
|
|
*list = (*list)->next;
|
|
return x;
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_not(struct grep_pat **list)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *x;
|
|
|
|
p = *list;
|
|
if (!p)
|
|
return NULL;
|
|
switch (p->token) {
|
|
case GREP_NOT:
|
|
if (!p->next)
|
|
die("--not not followed by pattern expression");
|
|
*list = p->next;
|
|
x = compile_pattern_not(list);
|
|
if (!x)
|
|
die("--not followed by non pattern expression");
|
|
return grep_not_expr(x);
|
|
default:
|
|
return compile_pattern_atom(list);
|
|
}
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_and(struct grep_pat **list)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *x, *y;
|
|
|
|
x = compile_pattern_not(list);
|
|
p = *list;
|
|
if (p && p->token == GREP_AND) {
|
|
if (!x)
|
|
die("--and not preceded by pattern expression");
|
|
if (!p->next)
|
|
die("--and not followed by pattern expression");
|
|
*list = p->next;
|
|
y = compile_pattern_and(list);
|
|
if (!y)
|
|
die("--and not followed by pattern expression");
|
|
return grep_and_expr(x, y);
|
|
}
|
|
return x;
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_or(struct grep_pat **list)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *x, *y;
|
|
|
|
x = compile_pattern_and(list);
|
|
p = *list;
|
|
if (x && p && p->token != GREP_CLOSE_PAREN) {
|
|
y = compile_pattern_or(list);
|
|
if (!y)
|
|
die("not a pattern expression %s", p->pattern);
|
|
return grep_or_expr(x, y);
|
|
}
|
|
return x;
|
|
}
|
|
|
|
static struct grep_expr *compile_pattern_expr(struct grep_pat **list)
|
|
{
|
|
return compile_pattern_or(list);
|
|
}
|
|
|
|
static struct grep_expr *grep_true_expr(void)
|
|
{
|
|
struct grep_expr *z = xcalloc(1, sizeof(*z));
|
|
z->node = GREP_NODE_TRUE;
|
|
return z;
|
|
}
|
|
|
|
static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *header_expr;
|
|
struct grep_expr *(header_group[GREP_HEADER_FIELD_MAX]);
|
|
enum grep_header_field fld;
|
|
|
|
if (!opt->header_list)
|
|
return NULL;
|
|
|
|
for (p = opt->header_list; p; p = p->next) {
|
|
if (p->token != GREP_PATTERN_HEAD)
|
|
BUG("a non-header pattern in grep header list.");
|
|
if (p->field < GREP_HEADER_FIELD_MIN ||
|
|
GREP_HEADER_FIELD_MAX <= p->field)
|
|
BUG("unknown header field %d", p->field);
|
|
compile_regexp(p, opt);
|
|
}
|
|
|
|
for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++)
|
|
header_group[fld] = NULL;
|
|
|
|
for (p = opt->header_list; p; p = p->next) {
|
|
struct grep_expr *h;
|
|
struct grep_pat *pp = p;
|
|
|
|
h = compile_pattern_atom(&pp);
|
|
if (!h || pp != p->next)
|
|
BUG("malformed header expr");
|
|
if (!header_group[p->field]) {
|
|
header_group[p->field] = h;
|
|
continue;
|
|
}
|
|
header_group[p->field] = grep_or_expr(h, header_group[p->field]);
|
|
}
|
|
|
|
header_expr = NULL;
|
|
|
|
for (fld = 0; fld < GREP_HEADER_FIELD_MAX; fld++) {
|
|
if (!header_group[fld])
|
|
continue;
|
|
if (!header_expr)
|
|
header_expr = grep_true_expr();
|
|
header_expr = grep_or_expr(header_group[fld], header_expr);
|
|
}
|
|
return header_expr;
|
|
}
|
|
|
|
static struct grep_expr *grep_splice_or(struct grep_expr *x, struct grep_expr *y)
|
|
{
|
|
struct grep_expr *z = x;
|
|
|
|
while (x) {
|
|
assert(x->node == GREP_NODE_OR);
|
|
if (x->u.binary.right &&
|
|
x->u.binary.right->node == GREP_NODE_TRUE) {
|
|
x->u.binary.right = y;
|
|
break;
|
|
}
|
|
x = x->u.binary.right;
|
|
}
|
|
return z;
|
|
}
|
|
|
|
void compile_grep_patterns(struct grep_opt *opt)
|
|
{
|
|
struct grep_pat *p;
|
|
struct grep_expr *header_expr = prep_header_patterns(opt);
|
|
int extended = 0;
|
|
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
switch (p->token) {
|
|
case GREP_PATTERN: /* atom */
|
|
case GREP_PATTERN_HEAD:
|
|
case GREP_PATTERN_BODY:
|
|
compile_regexp(p, opt);
|
|
break;
|
|
default:
|
|
extended = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (opt->all_match || opt->no_body_match || header_expr)
|
|
extended = 1;
|
|
else if (!extended)
|
|
return;
|
|
|
|
p = opt->pattern_list;
|
|
if (p)
|
|
opt->pattern_expression = compile_pattern_expr(&p);
|
|
if (p)
|
|
die("incomplete pattern expression: %s", p->pattern);
|
|
|
|
if (opt->no_body_match && opt->pattern_expression)
|
|
opt->pattern_expression = grep_not_expr(opt->pattern_expression);
|
|
|
|
if (!header_expr)
|
|
return;
|
|
|
|
if (!opt->pattern_expression)
|
|
opt->pattern_expression = header_expr;
|
|
else if (opt->all_match)
|
|
opt->pattern_expression = grep_splice_or(header_expr,
|
|
opt->pattern_expression);
|
|
else
|
|
opt->pattern_expression = grep_or_expr(opt->pattern_expression,
|
|
header_expr);
|
|
opt->all_match = 1;
|
|
}
|
|
|
|
static void free_pattern_expr(struct grep_expr *x)
|
|
{
|
|
switch (x->node) {
|
|
case GREP_NODE_TRUE:
|
|
case GREP_NODE_ATOM:
|
|
break;
|
|
case GREP_NODE_NOT:
|
|
free_pattern_expr(x->u.unary);
|
|
break;
|
|
case GREP_NODE_AND:
|
|
case GREP_NODE_OR:
|
|
free_pattern_expr(x->u.binary.left);
|
|
free_pattern_expr(x->u.binary.right);
|
|
break;
|
|
}
|
|
free(x);
|
|
}
|
|
|
|
static void free_grep_pat(struct grep_pat *pattern)
|
|
{
|
|
struct grep_pat *p, *n;
|
|
|
|
for (p = pattern; p; p = n) {
|
|
n = p->next;
|
|
switch (p->token) {
|
|
case GREP_PATTERN: /* atom */
|
|
case GREP_PATTERN_HEAD:
|
|
case GREP_PATTERN_BODY:
|
|
if (p->pcre2_pattern)
|
|
free_pcre2_pattern(p);
|
|
else
|
|
regfree(&p->regexp);
|
|
free(p->pattern);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
free(p);
|
|
}
|
|
}
|
|
|
|
void free_grep_patterns(struct grep_opt *opt)
|
|
{
|
|
free_grep_pat(opt->pattern_list);
|
|
free_grep_pat(opt->header_list);
|
|
|
|
if (opt->pattern_expression)
|
|
free_pattern_expr(opt->pattern_expression);
|
|
}
|
|
|
|
static const char *end_of_line(const char *cp, unsigned long *left)
|
|
{
|
|
unsigned long l = *left;
|
|
while (l && *cp != '\n') {
|
|
l--;
|
|
cp++;
|
|
}
|
|
*left = l;
|
|
return cp;
|
|
}
|
|
|
|
static int word_char(char ch)
|
|
{
|
|
return isalnum(ch) || ch == '_';
|
|
}
|
|
|
|
static void output_color(struct grep_opt *opt, const void *data, size_t size,
|
|
const char *color)
|
|
{
|
|
if (want_color(opt->color) && color && color[0]) {
|
|
opt->output(opt, color, strlen(color));
|
|
opt->output(opt, data, size);
|
|
opt->output(opt, GIT_COLOR_RESET, strlen(GIT_COLOR_RESET));
|
|
} else
|
|
opt->output(opt, data, size);
|
|
}
|
|
|
|
static void output_sep(struct grep_opt *opt, char sign)
|
|
{
|
|
if (opt->null_following_name)
|
|
opt->output(opt, "\0", 1);
|
|
else
|
|
output_color(opt, &sign, 1, opt->colors[GREP_COLOR_SEP]);
|
|
}
|
|
|
|
static void show_name(struct grep_opt *opt, const char *name)
|
|
{
|
|
output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
|
|
opt->output(opt, opt->null_following_name ? "\0" : "\n", 1);
|
|
}
|
|
|
|
static int patmatch(struct grep_pat *p,
|
|
const char *line, const char *eol,
|
|
regmatch_t *match, int eflags)
|
|
{
|
|
int hit;
|
|
|
|
if (p->pcre2_pattern)
|
|
hit = !pcre2match(p, line, eol, match, eflags);
|
|
else
|
|
hit = !regexec_buf(&p->regexp, line, eol - line, 1, match,
|
|
eflags);
|
|
|
|
return hit;
|
|
}
|
|
|
|
static void strip_timestamp(const char *bol, const char **eol_p)
|
|
{
|
|
const char *eol = *eol_p;
|
|
|
|
while (bol < --eol) {
|
|
if (*eol != '>')
|
|
continue;
|
|
*eol_p = ++eol;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static struct {
|
|
const char *field;
|
|
size_t len;
|
|
} header_field[] = {
|
|
{ "author ", 7 },
|
|
{ "committer ", 10 },
|
|
{ "reflog ", 7 },
|
|
};
|
|
|
|
static int headerless_match_one_pattern(struct grep_pat *p,
|
|
const char *bol, const char *eol,
|
|
enum grep_context ctx,
|
|
regmatch_t *pmatch, int eflags)
|
|
{
|
|
int hit = 0;
|
|
const char *start = bol;
|
|
|
|
if ((p->token != GREP_PATTERN) &&
|
|
((p->token == GREP_PATTERN_HEAD) != (ctx == GREP_CONTEXT_HEAD)))
|
|
return 0;
|
|
|
|
again:
|
|
hit = patmatch(p, bol, eol, pmatch, eflags);
|
|
|
|
if (hit && p->word_regexp) {
|
|
if ((pmatch[0].rm_so < 0) ||
|
|
(eol - bol) < pmatch[0].rm_so ||
|
|
(pmatch[0].rm_eo < 0) ||
|
|
(eol - bol) < pmatch[0].rm_eo)
|
|
die("regexp returned nonsense");
|
|
|
|
/* Match beginning must be either beginning of the
|
|
* line, or at word boundary (i.e. the last char must
|
|
* not be a word char). Similarly, match end must be
|
|
* either end of the line, or at word boundary
|
|
* (i.e. the next char must not be a word char).
|
|
*/
|
|
if ( ((pmatch[0].rm_so == 0) ||
|
|
!word_char(bol[pmatch[0].rm_so-1])) &&
|
|
((pmatch[0].rm_eo == (eol-bol)) ||
|
|
!word_char(bol[pmatch[0].rm_eo])) )
|
|
;
|
|
else
|
|
hit = 0;
|
|
|
|
/* Words consist of at least one character. */
|
|
if (pmatch->rm_so == pmatch->rm_eo)
|
|
hit = 0;
|
|
|
|
if (!hit && pmatch[0].rm_so + bol + 1 < eol) {
|
|
/* There could be more than one match on the
|
|
* line, and the first match might not be
|
|
* strict word match. But later ones could be!
|
|
* Forward to the next possible start, i.e. the
|
|
* next position following a non-word char.
|
|
*/
|
|
bol = pmatch[0].rm_so + bol + 1;
|
|
while (word_char(bol[-1]) && bol < eol)
|
|
bol++;
|
|
eflags |= REG_NOTBOL;
|
|
if (bol < eol)
|
|
goto again;
|
|
}
|
|
}
|
|
if (hit) {
|
|
pmatch[0].rm_so += bol - start;
|
|
pmatch[0].rm_eo += bol - start;
|
|
}
|
|
return hit;
|
|
}
|
|
|
|
static int match_one_pattern(struct grep_pat *p,
|
|
const char *bol, const char *eol,
|
|
enum grep_context ctx, regmatch_t *pmatch,
|
|
int eflags)
|
|
{
|
|
const char *field;
|
|
size_t len;
|
|
|
|
if (p->token == GREP_PATTERN_HEAD) {
|
|
assert(p->field < ARRAY_SIZE(header_field));
|
|
field = header_field[p->field].field;
|
|
len = header_field[p->field].len;
|
|
if (strncmp(bol, field, len))
|
|
return 0;
|
|
bol += len;
|
|
|
|
switch (p->field) {
|
|
case GREP_HEADER_AUTHOR:
|
|
case GREP_HEADER_COMMITTER:
|
|
strip_timestamp(bol, &eol);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return headerless_match_one_pattern(p, bol, eol, ctx, pmatch, eflags);
|
|
}
|
|
|
|
|
|
static int match_expr_eval(struct grep_opt *opt, struct grep_expr *x,
|
|
const char *bol, const char *eol,
|
|
enum grep_context ctx, ssize_t *col,
|
|
ssize_t *icol, int collect_hits)
|
|
{
|
|
int h = 0;
|
|
|
|
switch (x->node) {
|
|
case GREP_NODE_TRUE:
|
|
h = 1;
|
|
break;
|
|
case GREP_NODE_ATOM:
|
|
{
|
|
regmatch_t tmp;
|
|
h = match_one_pattern(x->u.atom, bol, eol, ctx,
|
|
&tmp, 0);
|
|
if (h && (*col < 0 || tmp.rm_so < *col))
|
|
*col = tmp.rm_so;
|
|
}
|
|
if (x->u.atom->token == GREP_PATTERN_BODY)
|
|
opt->body_hit |= h;
|
|
break;
|
|
case GREP_NODE_NOT:
|
|
/*
|
|
* Upon visiting a GREP_NODE_NOT, col and icol become swapped.
|
|
*/
|
|
h = !match_expr_eval(opt, x->u.unary, bol, eol, ctx, icol, col,
|
|
0);
|
|
break;
|
|
case GREP_NODE_AND:
|
|
h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col,
|
|
icol, 0);
|
|
if (h || opt->columnnum) {
|
|
/*
|
|
* Don't short-circuit AND when given --column, since a
|
|
* NOT earlier in the tree may turn this into an OR. In
|
|
* this case, see the below comment.
|
|
*/
|
|
h &= match_expr_eval(opt, x->u.binary.right, bol, eol,
|
|
ctx, col, icol, 0);
|
|
}
|
|
break;
|
|
case GREP_NODE_OR:
|
|
if (!(collect_hits || opt->columnnum)) {
|
|
/*
|
|
* Don't short-circuit OR when given --column (or
|
|
* collecting hits) to ensure we don't skip a later
|
|
* child that would produce an earlier match.
|
|
*/
|
|
return (match_expr_eval(opt, x->u.binary.left, bol, eol,
|
|
ctx, col, icol, 0) ||
|
|
match_expr_eval(opt, x->u.binary.right, bol,
|
|
eol, ctx, col, icol, 0));
|
|
}
|
|
h = match_expr_eval(opt, x->u.binary.left, bol, eol, ctx, col,
|
|
icol, 0);
|
|
if (collect_hits)
|
|
x->u.binary.left->hit |= h;
|
|
h |= match_expr_eval(opt, x->u.binary.right, bol, eol, ctx, col,
|
|
icol, collect_hits);
|
|
break;
|
|
default:
|
|
die("Unexpected node type (internal error) %d", x->node);
|
|
}
|
|
if (collect_hits)
|
|
x->hit |= h;
|
|
return h;
|
|
}
|
|
|
|
static int match_expr(struct grep_opt *opt,
|
|
const char *bol, const char *eol,
|
|
enum grep_context ctx, ssize_t *col,
|
|
ssize_t *icol, int collect_hits)
|
|
{
|
|
struct grep_expr *x = opt->pattern_expression;
|
|
return match_expr_eval(opt, x, bol, eol, ctx, col, icol, collect_hits);
|
|
}
|
|
|
|
static int match_line(struct grep_opt *opt,
|
|
const char *bol, const char *eol,
|
|
ssize_t *col, ssize_t *icol,
|
|
enum grep_context ctx, int collect_hits)
|
|
{
|
|
struct grep_pat *p;
|
|
int hit = 0;
|
|
|
|
if (opt->pattern_expression)
|
|
return match_expr(opt, bol, eol, ctx, col, icol,
|
|
collect_hits);
|
|
|
|
/* we do not call with collect_hits without being extended */
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
regmatch_t tmp;
|
|
if (match_one_pattern(p, bol, eol, ctx, &tmp, 0)) {
|
|
hit |= 1;
|
|
if (!opt->columnnum) {
|
|
/*
|
|
* Without --column, any single match on a line
|
|
* is enough to know that it needs to be
|
|
* printed. With --column, scan _all_ patterns
|
|
* to find the earliest.
|
|
*/
|
|
break;
|
|
}
|
|
if (*col < 0 || tmp.rm_so < *col)
|
|
*col = tmp.rm_so;
|
|
}
|
|
}
|
|
return hit;
|
|
}
|
|
|
|
static int match_next_pattern(struct grep_pat *p,
|
|
const char *bol, const char *eol,
|
|
enum grep_context ctx,
|
|
regmatch_t *pmatch, int eflags)
|
|
{
|
|
regmatch_t match;
|
|
|
|
if (!headerless_match_one_pattern(p, bol, eol, ctx, &match, eflags))
|
|
return 0;
|
|
if (match.rm_so < 0 || match.rm_eo < 0)
|
|
return 0;
|
|
if (pmatch->rm_so >= 0 && pmatch->rm_eo >= 0) {
|
|
if (match.rm_so > pmatch->rm_so)
|
|
return 1;
|
|
if (match.rm_so == pmatch->rm_so && match.rm_eo < pmatch->rm_eo)
|
|
return 1;
|
|
}
|
|
pmatch->rm_so = match.rm_so;
|
|
pmatch->rm_eo = match.rm_eo;
|
|
return 1;
|
|
}
|
|
|
|
int grep_next_match(struct grep_opt *opt,
|
|
const char *bol, const char *eol,
|
|
enum grep_context ctx, regmatch_t *pmatch,
|
|
enum grep_header_field field, int eflags)
|
|
{
|
|
struct grep_pat *p;
|
|
int hit = 0;
|
|
|
|
pmatch->rm_so = pmatch->rm_eo = -1;
|
|
if (bol < eol) {
|
|
for (p = ((ctx == GREP_CONTEXT_HEAD)
|
|
? opt->header_list : opt->pattern_list);
|
|
p; p = p->next) {
|
|
switch (p->token) {
|
|
case GREP_PATTERN_HEAD:
|
|
if ((field != GREP_HEADER_FIELD_MAX) &&
|
|
(p->field != field))
|
|
continue;
|
|
/* fall thru */
|
|
case GREP_PATTERN: /* atom */
|
|
case GREP_PATTERN_BODY:
|
|
hit |= match_next_pattern(p, bol, eol, ctx,
|
|
pmatch, eflags);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return hit;
|
|
}
|
|
|
|
static void show_line_header(struct grep_opt *opt, const char *name,
|
|
unsigned lno, ssize_t cno, char sign)
|
|
{
|
|
if (opt->heading && opt->last_shown == 0) {
|
|
output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
|
|
opt->output(opt, "\n", 1);
|
|
}
|
|
opt->last_shown = lno;
|
|
|
|
if (!opt->heading && opt->pathname) {
|
|
output_color(opt, name, strlen(name), opt->colors[GREP_COLOR_FILENAME]);
|
|
output_sep(opt, sign);
|
|
}
|
|
if (opt->linenum) {
|
|
char buf[32];
|
|
xsnprintf(buf, sizeof(buf), "%d", lno);
|
|
output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_LINENO]);
|
|
output_sep(opt, sign);
|
|
}
|
|
/*
|
|
* Treat 'cno' as the 1-indexed offset from the start of a non-context
|
|
* line to its first match. Otherwise, 'cno' is 0 indicating that we are
|
|
* being called with a context line.
|
|
*/
|
|
if (opt->columnnum && cno) {
|
|
char buf[32];
|
|
xsnprintf(buf, sizeof(buf), "%"PRIuMAX, (uintmax_t)cno);
|
|
output_color(opt, buf, strlen(buf), opt->colors[GREP_COLOR_COLUMNNO]);
|
|
output_sep(opt, sign);
|
|
}
|
|
}
|
|
|
|
static void show_line(struct grep_opt *opt,
|
|
const char *bol, const char *eol,
|
|
const char *name, unsigned lno, ssize_t cno, char sign)
|
|
{
|
|
int rest = eol - bol;
|
|
const char *match_color = NULL;
|
|
const char *line_color = NULL;
|
|
|
|
if (opt->file_break && opt->last_shown == 0) {
|
|
if (opt->show_hunk_mark)
|
|
opt->output(opt, "\n", 1);
|
|
} else if (opt->pre_context || opt->post_context || opt->funcbody) {
|
|
if (opt->last_shown == 0) {
|
|
if (opt->show_hunk_mark) {
|
|
output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]);
|
|
opt->output(opt, "\n", 1);
|
|
}
|
|
} else if (lno > opt->last_shown + 1) {
|
|
output_color(opt, "--", 2, opt->colors[GREP_COLOR_SEP]);
|
|
opt->output(opt, "\n", 1);
|
|
}
|
|
}
|
|
if (!opt->only_matching) {
|
|
/*
|
|
* In case the line we're being called with contains more than
|
|
* one match, leave printing each header to the loop below.
|
|
*/
|
|
show_line_header(opt, name, lno, cno, sign);
|
|
}
|
|
if (opt->color || opt->only_matching) {
|
|
regmatch_t match;
|
|
enum grep_context ctx = GREP_CONTEXT_BODY;
|
|
int eflags = 0;
|
|
|
|
if (opt->color) {
|
|
if (sign == ':')
|
|
match_color = opt->colors[GREP_COLOR_MATCH_SELECTED];
|
|
else
|
|
match_color = opt->colors[GREP_COLOR_MATCH_CONTEXT];
|
|
if (sign == ':')
|
|
line_color = opt->colors[GREP_COLOR_SELECTED];
|
|
else if (sign == '-')
|
|
line_color = opt->colors[GREP_COLOR_CONTEXT];
|
|
else if (sign == '=')
|
|
line_color = opt->colors[GREP_COLOR_FUNCTION];
|
|
}
|
|
while (grep_next_match(opt, bol, eol, ctx, &match,
|
|
GREP_HEADER_FIELD_MAX, eflags)) {
|
|
if (match.rm_so == match.rm_eo)
|
|
break;
|
|
|
|
if (opt->only_matching)
|
|
show_line_header(opt, name, lno, cno, sign);
|
|
else
|
|
output_color(opt, bol, match.rm_so, line_color);
|
|
output_color(opt, bol + match.rm_so,
|
|
match.rm_eo - match.rm_so, match_color);
|
|
if (opt->only_matching)
|
|
opt->output(opt, "\n", 1);
|
|
bol += match.rm_eo;
|
|
cno += match.rm_eo;
|
|
rest -= match.rm_eo;
|
|
eflags = REG_NOTBOL;
|
|
}
|
|
}
|
|
if (!opt->only_matching) {
|
|
output_color(opt, bol, rest, line_color);
|
|
opt->output(opt, "\n", 1);
|
|
}
|
|
}
|
|
|
|
int grep_use_locks;
|
|
|
|
/*
|
|
* This lock protects access to the gitattributes machinery, which is
|
|
* not thread-safe.
|
|
*/
|
|
pthread_mutex_t grep_attr_mutex;
|
|
|
|
static inline void grep_attr_lock(void)
|
|
{
|
|
if (grep_use_locks)
|
|
pthread_mutex_lock(&grep_attr_mutex);
|
|
}
|
|
|
|
static inline void grep_attr_unlock(void)
|
|
{
|
|
if (grep_use_locks)
|
|
pthread_mutex_unlock(&grep_attr_mutex);
|
|
}
|
|
|
|
static int match_funcname(struct grep_opt *opt, struct grep_source *gs,
|
|
const char *bol, const char *eol)
|
|
{
|
|
xdemitconf_t *xecfg = opt->priv;
|
|
if (xecfg && !xecfg->find_func) {
|
|
grep_source_load_driver(gs, opt->repo->index);
|
|
if (gs->driver->funcname.pattern) {
|
|
const struct userdiff_funcname *pe = &gs->driver->funcname;
|
|
xdiff_set_find_func(xecfg, pe->pattern, pe->cflags);
|
|
} else {
|
|
xecfg = opt->priv = NULL;
|
|
}
|
|
}
|
|
|
|
if (xecfg) {
|
|
char buf[1];
|
|
return xecfg->find_func(bol, eol - bol, buf, 1,
|
|
xecfg->find_func_priv) >= 0;
|
|
}
|
|
|
|
if (bol == eol)
|
|
return 0;
|
|
if (isalpha(*bol) || *bol == '_' || *bol == '$')
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
|
|
const char *bol, unsigned lno)
|
|
{
|
|
while (bol > gs->buf) {
|
|
const char *eol = --bol;
|
|
|
|
while (bol > gs->buf && bol[-1] != '\n')
|
|
bol--;
|
|
lno--;
|
|
|
|
if (lno <= opt->last_shown)
|
|
break;
|
|
|
|
if (match_funcname(opt, gs, bol, eol)) {
|
|
show_line(opt, bol, eol, gs->name, lno, 0, '=');
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int is_empty_line(const char *bol, const char *eol);
|
|
|
|
static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,
|
|
const char *bol, const char *end, unsigned lno)
|
|
{
|
|
unsigned cur = lno, from = 1, funcname_lno = 0, orig_from;
|
|
int funcname_needed = !!opt->funcname, comment_needed = 0;
|
|
|
|
if (opt->pre_context < lno)
|
|
from = lno - opt->pre_context;
|
|
if (from <= opt->last_shown)
|
|
from = opt->last_shown + 1;
|
|
orig_from = from;
|
|
if (opt->funcbody) {
|
|
if (match_funcname(opt, gs, bol, end))
|
|
comment_needed = 1;
|
|
else
|
|
funcname_needed = 1;
|
|
from = opt->last_shown + 1;
|
|
}
|
|
|
|
/* Rewind. */
|
|
while (bol > gs->buf && cur > from) {
|
|
const char *next_bol = bol;
|
|
const char *eol = --bol;
|
|
|
|
while (bol > gs->buf && bol[-1] != '\n')
|
|
bol--;
|
|
cur--;
|
|
if (comment_needed && (is_empty_line(bol, eol) ||
|
|
match_funcname(opt, gs, bol, eol))) {
|
|
comment_needed = 0;
|
|
from = orig_from;
|
|
if (cur < from) {
|
|
cur++;
|
|
bol = next_bol;
|
|
break;
|
|
}
|
|
}
|
|
if (funcname_needed && match_funcname(opt, gs, bol, eol)) {
|
|
funcname_lno = cur;
|
|
funcname_needed = 0;
|
|
if (opt->funcbody)
|
|
comment_needed = 1;
|
|
else
|
|
from = orig_from;
|
|
}
|
|
}
|
|
|
|
/* We need to look even further back to find a function signature. */
|
|
if (opt->funcname && funcname_needed)
|
|
show_funcname_line(opt, gs, bol, cur);
|
|
|
|
/* Back forward. */
|
|
while (cur < lno) {
|
|
const char *eol = bol, sign = (cur == funcname_lno) ? '=' : '-';
|
|
|
|
while (*eol != '\n')
|
|
eol++;
|
|
show_line(opt, bol, eol, gs->name, cur, 0, sign);
|
|
bol = eol + 1;
|
|
cur++;
|
|
}
|
|
}
|
|
|
|
static int should_lookahead(struct grep_opt *opt)
|
|
{
|
|
struct grep_pat *p;
|
|
|
|
if (opt->pattern_expression)
|
|
return 0; /* punt for too complex stuff */
|
|
if (opt->invert)
|
|
return 0;
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
if (p->token != GREP_PATTERN)
|
|
return 0; /* punt for "header only" and stuff */
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int look_ahead(struct grep_opt *opt,
|
|
unsigned long *left_p,
|
|
unsigned *lno_p,
|
|
const char **bol_p)
|
|
{
|
|
unsigned lno = *lno_p;
|
|
const char *bol = *bol_p;
|
|
struct grep_pat *p;
|
|
const char *sp, *last_bol;
|
|
regoff_t earliest = -1;
|
|
|
|
for (p = opt->pattern_list; p; p = p->next) {
|
|
int hit;
|
|
regmatch_t m;
|
|
|
|
hit = patmatch(p, bol, bol + *left_p, &m, 0);
|
|
if (!hit || m.rm_so < 0 || m.rm_eo < 0)
|
|
continue;
|
|
if (earliest < 0 || m.rm_so < earliest)
|
|
earliest = m.rm_so;
|
|
}
|
|
|
|
if (earliest < 0) {
|
|
*bol_p = bol + *left_p;
|
|
*left_p = 0;
|
|
return 1;
|
|
}
|
|
for (sp = bol + earliest; bol < sp && sp[-1] != '\n'; sp--)
|
|
; /* find the beginning of the line */
|
|
last_bol = sp;
|
|
|
|
for (sp = bol; sp < last_bol; sp++) {
|
|
if (*sp == '\n')
|
|
lno++;
|
|
}
|
|
*left_p -= last_bol - bol;
|
|
*bol_p = last_bol;
|
|
*lno_p = lno;
|
|
return 0;
|
|
}
|
|
|
|
static int fill_textconv_grep(struct repository *r,
|
|
struct userdiff_driver *driver,
|
|
struct grep_source *gs)
|
|
{
|
|
struct diff_filespec *df;
|
|
char *buf;
|
|
size_t size;
|
|
|
|
if (!driver || !driver->textconv)
|
|
return grep_source_load(gs);
|
|
|
|
/*
|
|
* The textconv interface is intimately tied to diff_filespecs, so we
|
|
* have to pretend to be one. If we could unify the grep_source
|
|
* and diff_filespec structs, this mess could just go away.
|
|
*/
|
|
df = alloc_filespec(gs->path);
|
|
switch (gs->type) {
|
|
case GREP_SOURCE_OID:
|
|
fill_filespec(df, gs->identifier, 1, 0100644);
|
|
break;
|
|
case GREP_SOURCE_FILE:
|
|
fill_filespec(df, null_oid(), 0, 0100644);
|
|
break;
|
|
default:
|
|
BUG("attempt to textconv something without a path?");
|
|
}
|
|
|
|
/*
|
|
* fill_textconv is not remotely thread-safe; it modifies the global
|
|
* diff tempfile structure, writes to the_repo's odb and might
|
|
* internally call thread-unsafe functions such as the
|
|
* prepare_packed_git() lazy-initializator. Because of the last two, we
|
|
* must ensure mutual exclusion between this call and the object reading
|
|
* API, thus we use obj_read_lock() here.
|
|
*
|
|
* TODO: allowing text conversion to run in parallel with object
|
|
* reading operations might increase performance in the multithreaded
|
|
* non-worktreee git-grep with --textconv.
|
|
*/
|
|
obj_read_lock();
|
|
size = fill_textconv(r, driver, df, &buf);
|
|
obj_read_unlock();
|
|
free_filespec(df);
|
|
|
|
/*
|
|
* The normal fill_textconv usage by the diff machinery would just keep
|
|
* the textconv'd buf separate from the diff_filespec. But much of the
|
|
* grep code passes around a grep_source and assumes that its "buf"
|
|
* pointer is the beginning of the thing we are searching. So let's
|
|
* install our textconv'd version into the grep_source, taking care not
|
|
* to leak any existing buffer.
|
|
*/
|
|
grep_source_clear_data(gs);
|
|
gs->buf = buf;
|
|
gs->size = size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int is_empty_line(const char *bol, const char *eol)
|
|
{
|
|
while (bol < eol && isspace(*bol))
|
|
bol++;
|
|
return bol == eol;
|
|
}
|
|
|
|
static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int collect_hits)
|
|
{
|
|
const char *bol;
|
|
const char *peek_bol = NULL;
|
|
unsigned long left;
|
|
unsigned lno = 1;
|
|
unsigned last_hit = 0;
|
|
int binary_match_only = 0;
|
|
unsigned count = 0;
|
|
int try_lookahead = 0;
|
|
int show_function = 0;
|
|
struct userdiff_driver *textconv = NULL;
|
|
enum grep_context ctx = GREP_CONTEXT_HEAD;
|
|
xdemitconf_t xecfg;
|
|
|
|
if (!opt->status_only && gs->name == NULL)
|
|
BUG("grep call which could print a name requires "
|
|
"grep_source.name be non-NULL");
|
|
|
|
if (!opt->output)
|
|
opt->output = std_output;
|
|
|
|
if (opt->pre_context || opt->post_context || opt->file_break ||
|
|
opt->funcbody) {
|
|
/* Show hunk marks, except for the first file. */
|
|
if (opt->last_shown)
|
|
opt->show_hunk_mark = 1;
|
|
/*
|
|
* If we're using threads then we can't easily identify
|
|
* the first file. Always put hunk marks in that case
|
|
* and skip the very first one later in work_done().
|
|
*/
|
|
if (opt->output != std_output)
|
|
opt->show_hunk_mark = 1;
|
|
}
|
|
opt->last_shown = 0;
|
|
|
|
if (opt->allow_textconv) {
|
|
grep_source_load_driver(gs, opt->repo->index);
|
|
/*
|
|
* We might set up the shared textconv cache data here, which
|
|
* is not thread-safe. Also, get_oid_with_context() and
|
|
* parse_object() might be internally called. As they are not
|
|
* currently thread-safe and might be racy with object reading,
|
|
* obj_read_lock() must be called.
|
|
*/
|
|
grep_attr_lock();
|
|
obj_read_lock();
|
|
textconv = userdiff_get_textconv(opt->repo, gs->driver);
|
|
obj_read_unlock();
|
|
grep_attr_unlock();
|
|
}
|
|
|
|
/*
|
|
* We know the result of a textconv is text, so we only have to care
|
|
* about binary handling if we are not using it.
|
|
*/
|
|
if (!textconv) {
|
|
switch (opt->binary) {
|
|
case GREP_BINARY_DEFAULT:
|
|
if (grep_source_is_binary(gs, opt->repo->index))
|
|
binary_match_only = 1;
|
|
break;
|
|
case GREP_BINARY_NOMATCH:
|
|
if (grep_source_is_binary(gs, opt->repo->index))
|
|
return 0; /* Assume unmatch */
|
|
break;
|
|
case GREP_BINARY_TEXT:
|
|
break;
|
|
default:
|
|
BUG("unknown binary handling mode");
|
|
}
|
|
}
|
|
|
|
memset(&xecfg, 0, sizeof(xecfg));
|
|
opt->priv = &xecfg;
|
|
|
|
try_lookahead = should_lookahead(opt);
|
|
|
|
if (fill_textconv_grep(opt->repo, textconv, gs) < 0)
|
|
return 0;
|
|
|
|
bol = gs->buf;
|
|
left = gs->size;
|
|
while (left) {
|
|
const char *eol;
|
|
int hit;
|
|
ssize_t cno;
|
|
ssize_t col = -1, icol = -1;
|
|
|
|
/*
|
|
* look_ahead() skips quickly to the line that possibly
|
|
* has the next hit; don't call it if we need to do
|
|
* something more than just skipping the current line
|
|
* in response to an unmatch for the current line. E.g.
|
|
* inside a post-context window, we will show the current
|
|
* line as a context around the previous hit when it
|
|
* doesn't hit.
|
|
*/
|
|
if (try_lookahead
|
|
&& !(last_hit
|
|
&& (show_function ||
|
|
lno <= last_hit + opt->post_context))
|
|
&& look_ahead(opt, &left, &lno, &bol))
|
|
break;
|
|
eol = end_of_line(bol, &left);
|
|
|
|
if ((ctx == GREP_CONTEXT_HEAD) && (eol == bol))
|
|
ctx = GREP_CONTEXT_BODY;
|
|
|
|
hit = match_line(opt, bol, eol, &col, &icol, ctx, collect_hits);
|
|
|
|
if (collect_hits)
|
|
goto next_line;
|
|
|
|
/* "grep -v -e foo -e bla" should list lines
|
|
* that do not have either, so inversion should
|
|
* be done outside.
|
|
*/
|
|
if (opt->invert)
|
|
hit = !hit;
|
|
if (opt->unmatch_name_only) {
|
|
if (hit)
|
|
return 0;
|
|
goto next_line;
|
|
}
|
|
if (hit && (opt->max_count < 0 || count < opt->max_count)) {
|
|
count++;
|
|
if (opt->status_only)
|
|
return 1;
|
|
if (opt->name_only) {
|
|
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, gs->name, strlen(gs->name),
|
|
opt->colors[GREP_COLOR_FILENAME]);
|
|
opt->output(opt, " matches\n", 9);
|
|
return 1;
|
|
}
|
|
/* Hit at this line. If we haven't shown the
|
|
* pre-context lines, we would need to show them.
|
|
*/
|
|
if (opt->pre_context || opt->funcbody)
|
|
show_pre_context(opt, gs, bol, eol, lno);
|
|
else if (opt->funcname)
|
|
show_funcname_line(opt, gs, bol, lno);
|
|
cno = opt->invert ? icol : col;
|
|
if (cno < 0) {
|
|
/*
|
|
* A negative cno indicates that there was no
|
|
* match on the line. We are thus inverted and
|
|
* being asked to show all lines that _don't_
|
|
* match a given expression. Therefore, set cno
|
|
* to 0 to suggest the whole line matches.
|
|
*/
|
|
cno = 0;
|
|
}
|
|
show_line(opt, bol, eol, gs->name, lno, cno + 1, ':');
|
|
last_hit = lno;
|
|
if (opt->funcbody)
|
|
show_function = 1;
|
|
goto next_line;
|
|
}
|
|
if (show_function && (!peek_bol || peek_bol < bol)) {
|
|
unsigned long peek_left = left;
|
|
const char *peek_eol = eol;
|
|
|
|
/*
|
|
* Trailing empty lines are not interesting.
|
|
* Peek past them to see if they belong to the
|
|
* body of the current function.
|
|
*/
|
|
peek_bol = bol;
|
|
while (is_empty_line(peek_bol, peek_eol)) {
|
|
peek_bol = peek_eol + 1;
|
|
peek_eol = end_of_line(peek_bol, &peek_left);
|
|
}
|
|
|
|
if (match_funcname(opt, gs, peek_bol, peek_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, gs->name, lno, col + 1, '-');
|
|
}
|
|
|
|
next_line:
|
|
bol = eol + 1;
|
|
if (!left)
|
|
break;
|
|
left--;
|
|
lno++;
|
|
}
|
|
|
|
if (collect_hits)
|
|
return 0;
|
|
|
|
if (opt->status_only)
|
|
return opt->unmatch_name_only;
|
|
if (opt->unmatch_name_only) {
|
|
/* We did not see any hit, so we want to show this */
|
|
show_name(opt, gs->name);
|
|
return 1;
|
|
}
|
|
|
|
xdiff_clear_find_func(&xecfg);
|
|
opt->priv = NULL;
|
|
|
|
/* NEEDSWORK:
|
|
* The real "grep -c foo *.c" gives many "bar.c:0" lines,
|
|
* which feels mostly useless but sometimes useful. Maybe
|
|
* make it another option? For now suppress them.
|
|
*/
|
|
if (opt->count && count) {
|
|
char buf[32];
|
|
if (opt->pathname) {
|
|
output_color(opt, gs->name, strlen(gs->name),
|
|
opt->colors[GREP_COLOR_FILENAME]);
|
|
output_sep(opt, ':');
|
|
}
|
|
xsnprintf(buf, sizeof(buf), "%u\n", count);
|
|
opt->output(opt, buf, strlen(buf));
|
|
return 1;
|
|
}
|
|
return !!last_hit;
|
|
}
|
|
|
|
static void clr_hit_marker(struct grep_expr *x)
|
|
{
|
|
/* All-hit markers are meaningful only at the very top level
|
|
* OR node.
|
|
*/
|
|
while (1) {
|
|
x->hit = 0;
|
|
if (x->node != GREP_NODE_OR)
|
|
return;
|
|
x->u.binary.left->hit = 0;
|
|
x = x->u.binary.right;
|
|
}
|
|
}
|
|
|
|
static int chk_hit_marker(struct grep_expr *x)
|
|
{
|
|
/* Top level nodes have hit markers. See if they all are hits */
|
|
while (1) {
|
|
if (x->node != GREP_NODE_OR)
|
|
return x->hit;
|
|
if (!x->u.binary.left->hit)
|
|
return 0;
|
|
x = x->u.binary.right;
|
|
}
|
|
}
|
|
|
|
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 && !opt->no_body_match)
|
|
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);
|
|
opt->body_hit = 0;
|
|
grep_source_1(opt, gs, 1);
|
|
|
|
if (opt->all_match && !chk_hit_marker(opt->pattern_expression))
|
|
return 0;
|
|
if (opt->no_body_match && opt->body_hit)
|
|
return 0;
|
|
|
|
return grep_source_1(opt, gs, 0);
|
|
}
|
|
|
|
static void grep_source_init_buf(struct grep_source *gs,
|
|
const char *buf,
|
|
unsigned long size)
|
|
{
|
|
gs->type = GREP_SOURCE_BUF;
|
|
gs->name = NULL;
|
|
gs->path = NULL;
|
|
gs->buf = buf;
|
|
gs->size = size;
|
|
gs->driver = NULL;
|
|
gs->identifier = NULL;
|
|
}
|
|
|
|
int grep_buffer(struct grep_opt *opt, const char *buf, unsigned long size)
|
|
{
|
|
struct grep_source gs;
|
|
int r;
|
|
|
|
grep_source_init_buf(&gs, buf, size);
|
|
|
|
r = grep_source(opt, &gs);
|
|
|
|
grep_source_clear(&gs);
|
|
return r;
|
|
}
|
|
|
|
void grep_source_init_file(struct grep_source *gs, const char *name,
|
|
const char *path)
|
|
{
|
|
gs->type = GREP_SOURCE_FILE;
|
|
gs->name = xstrdup_or_null(name);
|
|
gs->path = xstrdup_or_null(path);
|
|
gs->buf = NULL;
|
|
gs->size = 0;
|
|
gs->driver = NULL;
|
|
gs->identifier = xstrdup(path);
|
|
}
|
|
|
|
void grep_source_init_oid(struct grep_source *gs, const char *name,
|
|
const char *path, const struct object_id *oid,
|
|
struct repository *repo)
|
|
{
|
|
gs->type = GREP_SOURCE_OID;
|
|
gs->name = xstrdup_or_null(name);
|
|
gs->path = xstrdup_or_null(path);
|
|
gs->buf = NULL;
|
|
gs->size = 0;
|
|
gs->driver = NULL;
|
|
gs->identifier = oiddup(oid);
|
|
gs->repo = repo;
|
|
}
|
|
|
|
void grep_source_clear(struct grep_source *gs)
|
|
{
|
|
FREE_AND_NULL(gs->name);
|
|
FREE_AND_NULL(gs->path);
|
|
FREE_AND_NULL(gs->identifier);
|
|
grep_source_clear_data(gs);
|
|
}
|
|
|
|
void grep_source_clear_data(struct grep_source *gs)
|
|
{
|
|
switch (gs->type) {
|
|
case GREP_SOURCE_FILE:
|
|
case GREP_SOURCE_OID:
|
|
/* these types own the buffer */
|
|
free((char *)gs->buf);
|
|
gs->buf = NULL;
|
|
gs->size = 0;
|
|
break;
|
|
case GREP_SOURCE_BUF:
|
|
/* leave user-provided buf intact */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int grep_source_load_oid(struct grep_source *gs)
|
|
{
|
|
enum object_type type;
|
|
|
|
gs->buf = repo_read_object_file(gs->repo, gs->identifier, &type,
|
|
&gs->size);
|
|
if (!gs->buf)
|
|
return error(_("'%s': unable to read %s"),
|
|
gs->name,
|
|
oid_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_errno(_("failed to stat '%s'"), filename);
|
|
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 = xmallocz(size);
|
|
if (st.st_size != read_in_full(i, data, size)) {
|
|
error_errno(_("'%s': short read"), filename);
|
|
close(i);
|
|
free(data);
|
|
return -1;
|
|
}
|
|
close(i);
|
|
|
|
gs->buf = data;
|
|
gs->size = size;
|
|
return 0;
|
|
}
|
|
|
|
static 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_OID:
|
|
return grep_source_load_oid(gs);
|
|
case GREP_SOURCE_BUF:
|
|
return gs->buf ? 0 : -1;
|
|
}
|
|
BUG("invalid grep_source type to load");
|
|
}
|
|
|
|
void grep_source_load_driver(struct grep_source *gs,
|
|
struct index_state *istate)
|
|
{
|
|
if (gs->driver)
|
|
return;
|
|
|
|
grep_attr_lock();
|
|
if (gs->path)
|
|
gs->driver = userdiff_find_by_path(istate, gs->path);
|
|
if (!gs->driver)
|
|
gs->driver = userdiff_find_by_name("default");
|
|
grep_attr_unlock();
|
|
}
|
|
|
|
static int grep_source_is_binary(struct grep_source *gs,
|
|
struct index_state *istate)
|
|
{
|
|
grep_source_load_driver(gs, istate);
|
|
if (gs->driver->binary != -1)
|
|
return gs->driver->binary;
|
|
|
|
if (!grep_source_load(gs))
|
|
return buffer_is_binary(gs->buf, gs->size);
|
|
|
|
return 0;
|
|
}
|