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authorJeff King <peff@peff.net>2012-02-02 08:19:37 (GMT)
committerJunio C Hamano <gitster@pobox.com>2012-02-02 18:36:08 (GMT)
commit8f24a6323ece9be1bf1a04b4b5856112438337f2 (patch)
tree0a6728ca7f560af5b8bccbfac32f059c758414ac /builtin/grep.c
parente1327023ea22c3bf57e7d28596da356043f073fc (diff)
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convert git-grep to use grep_source interface
The grep_source interface (as opposed to grep_buffer) will eventually gives us a richer interface for telling the low-level grep code about our buffers. Eventually this will lead to things like better binary-file handling. For now, it lets us drop a lot of now-redundant code. The conversion is mostly straight-forward. One thing to note is that the memory ownership rules for "struct grep_source" are different than the "struct work_item" found here (the former will copy things like the filename, rather than taking ownership). Therefore you will also see some slight tweaking of when filename buffers are released. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/grep.c')
-rw-r--r--builtin/grep.c142
1 files changed, 23 insertions, 119 deletions
diff --git a/builtin/grep.c b/builtin/grep.c
index aeb3616..c9b6a13 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -29,25 +29,12 @@ static int use_threads = 1;
#define THREADS 8
static pthread_t threads[THREADS];
-static void *load_sha1(const unsigned char *sha1, unsigned long *size,
- const char *name);
-static void *load_file(const char *filename, size_t *sz);
-
-enum work_type {WORK_SHA1, WORK_FILE};
-
/* We use one producer thread and THREADS consumer
* threads. The producer adds struct work_items to 'todo' and the
* consumers pick work items from the same array.
*/
struct work_item {
- enum work_type type;
- char *name;
-
- /* if type == WORK_SHA1, then 'identifier' is a SHA1,
- * otherwise type == WORK_FILE, and 'identifier' is a NUL
- * terminated filename.
- */
- void *identifier;
+ struct grep_source source;
char done;
struct strbuf out;
};
@@ -98,7 +85,8 @@ static pthread_cond_t cond_result;
static int skip_first_line;
-static void add_work(enum work_type type, char *name, void *id)
+static void add_work(enum grep_source_type type, const char *name,
+ const void *id)
{
grep_lock();
@@ -106,9 +94,7 @@ static void add_work(enum work_type type, char *name, void *id)
pthread_cond_wait(&cond_write, &grep_mutex);
}
- todo[todo_end].type = type;
- todo[todo_end].name = name;
- todo[todo_end].identifier = id;
+ grep_source_init(&todo[todo_end].source, type, name, id);
todo[todo_end].done = 0;
strbuf_reset(&todo[todo_end].out);
todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
@@ -136,21 +122,6 @@ static struct work_item *get_work(void)
return ret;
}
-static void grep_sha1_async(struct grep_opt *opt, char *name,
- const unsigned char *sha1)
-{
- unsigned char *s;
- s = xmalloc(20);
- memcpy(s, sha1, 20);
- add_work(WORK_SHA1, name, s);
-}
-
-static void grep_file_async(struct grep_opt *opt, char *name,
- const char *filename)
-{
- add_work(WORK_FILE, name, xstrdup(filename));
-}
-
static void work_done(struct work_item *w)
{
int old_done;
@@ -177,8 +148,7 @@ static void work_done(struct work_item *w)
write_or_die(1, p, len);
}
- free(w->name);
- free(w->identifier);
+ grep_source_clear(&w->source);
}
if (old_done != todo_done)
@@ -201,25 +171,8 @@ static void *run(void *arg)
break;
opt->output_priv = w;
- if (w->type == WORK_SHA1) {
- unsigned long sz;
- void* data = load_sha1(w->identifier, &sz, w->name);
-
- if (data) {
- hit |= grep_buffer(opt, w->name, data, sz);
- free(data);
- }
- } else if (w->type == WORK_FILE) {
- size_t sz;
- void* data = load_file(w->identifier, &sz);
- if (data) {
- hit |= grep_buffer(opt, w->name, data, sz);
- free(data);
- }
- } else {
- assert(0);
- }
-
+ hit |= grep_source(opt, &w->source);
+ grep_source_clear_data(&w->source);
work_done(w);
}
free_grep_patterns(arg);
@@ -365,23 +318,10 @@ static void *lock_and_read_sha1_file(const unsigned char *sha1, enum object_type
return data;
}
-static void *load_sha1(const unsigned char *sha1, unsigned long *size,
- const char *name)
-{
- enum object_type type;
- void *data = lock_and_read_sha1_file(sha1, &type, size);
-
- if (!data)
- error(_("'%s': unable to read %s"), name, sha1_to_hex(sha1));
-
- return data;
-}
-
static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
const char *filename, int tree_name_len)
{
struct strbuf pathbuf = STRBUF_INIT;
- char *name;
if (opt->relative && opt->prefix_length) {
quote_path_relative(filename + tree_name_len, -1, &pathbuf,
@@ -391,87 +331,51 @@ static int grep_sha1(struct grep_opt *opt, const unsigned char *sha1,
strbuf_addstr(&pathbuf, filename);
}
- name = strbuf_detach(&pathbuf, NULL);
-
#ifndef NO_PTHREADS
if (use_threads) {
- grep_sha1_async(opt, name, sha1);
+ add_work(GREP_SOURCE_SHA1, pathbuf.buf, sha1);
+ strbuf_release(&pathbuf);
return 0;
} else
#endif
{
+ struct grep_source gs;
int hit;
- unsigned long sz;
- void *data = load_sha1(sha1, &sz, name);
- if (!data)
- hit = 0;
- else
- hit = grep_buffer(opt, name, data, sz);
- free(data);
- free(name);
- return hit;
- }
-}
+ grep_source_init(&gs, GREP_SOURCE_SHA1, pathbuf.buf, sha1);
+ strbuf_release(&pathbuf);
+ hit = grep_source(opt, &gs);
-static void *load_file(const char *filename, size_t *sz)
-{
- struct stat st;
- char *data;
- int i;
-
- if (lstat(filename, &st) < 0) {
- err_ret:
- if (errno != ENOENT)
- error(_("'%s': %s"), filename, strerror(errno));
- return NULL;
- }
- if (!S_ISREG(st.st_mode))
- return NULL;
- *sz = xsize_t(st.st_size);
- i = open(filename, O_RDONLY);
- if (i < 0)
- goto err_ret;
- data = xmalloc(*sz + 1);
- if (st.st_size != read_in_full(i, data, *sz)) {
- error(_("'%s': short read %s"), filename, strerror(errno));
- close(i);
- free(data);
- return NULL;
+ grep_source_clear(&gs);
+ return hit;
}
- close(i);
- data[*sz] = 0;
- return data;
}
static int grep_file(struct grep_opt *opt, const char *filename)
{
struct strbuf buf = STRBUF_INIT;
- char *name;
if (opt->relative && opt->prefix_length)
quote_path_relative(filename, -1, &buf, opt->prefix);
else
strbuf_addstr(&buf, filename);
- name = strbuf_detach(&buf, NULL);
#ifndef NO_PTHREADS
if (use_threads) {
- grep_file_async(opt, name, filename);
+ add_work(GREP_SOURCE_FILE, buf.buf, filename);
+ strbuf_release(&buf);
return 0;
} else
#endif
{
+ struct grep_source gs;
int hit;
- size_t sz;
- void *data = load_file(filename, &sz);
- if (!data)
- hit = 0;
- else
- hit = grep_buffer(opt, name, data, sz);
- free(data);
- free(name);
+ grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename);
+ strbuf_release(&buf);
+ hit = grep_source(opt, &gs);
+
+ grep_source_clear(&gs);
return hit;
}
}