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-rw-r--r--builtin-blame.c235
1 files changed, 69 insertions, 166 deletions
diff --git a/builtin-blame.c b/builtin-blame.c
index 101c416..aae14ef 100644
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -443,135 +443,6 @@ static struct origin *find_rename(struct scoreboard *sb,
}
/*
- * Parsing of patch chunks...
- */
-struct chunk {
- /* line number in postimage; up to but not including this
- * line is the same as preimage
- */
- int same;
-
- /* preimage line number after this chunk */
- int p_next;
-
- /* postimage line number after this chunk */
- int t_next;
-};
-
-struct patch {
- struct chunk *chunks;
- int num;
-};
-
-struct blame_diff_state {
- struct xdiff_emit_state xm;
- struct patch *ret;
- unsigned hunk_post_context;
- unsigned hunk_in_pre_context : 1;
-};
-
-static void process_u_diff(void *state_, char *line, unsigned long len)
-{
- struct blame_diff_state *state = state_;
- struct chunk *chunk;
- int off1, off2, len1, len2, num;
-
- num = state->ret->num;
- if (len < 4 || line[0] != '@' || line[1] != '@') {
- if (state->hunk_in_pre_context && line[0] == ' ')
- state->ret->chunks[num - 1].same++;
- else {
- state->hunk_in_pre_context = 0;
- if (line[0] == ' ')
- state->hunk_post_context++;
- else
- state->hunk_post_context = 0;
- }
- return;
- }
-
- if (num && state->hunk_post_context) {
- chunk = &state->ret->chunks[num - 1];
- chunk->p_next -= state->hunk_post_context;
- chunk->t_next -= state->hunk_post_context;
- }
- state->ret->num = ++num;
- state->ret->chunks = xrealloc(state->ret->chunks,
- sizeof(struct chunk) * num);
- chunk = &state->ret->chunks[num - 1];
- if (parse_hunk_header(line, len, &off1, &len1, &off2, &len2)) {
- state->ret->num--;
- return;
- }
-
- /* Line numbers in patch output are one based. */
- off1--;
- off2--;
-
- chunk->same = len2 ? off2 : (off2 + 1);
-
- chunk->p_next = off1 + (len1 ? len1 : 1);
- chunk->t_next = chunk->same + len2;
- state->hunk_in_pre_context = 1;
- state->hunk_post_context = 0;
-}
-
-static struct patch *compare_buffer(mmfile_t *file_p, mmfile_t *file_o,
- int context)
-{
- struct blame_diff_state state;
- xpparam_t xpp;
- xdemitconf_t xecfg;
- xdemitcb_t ecb;
-
- xpp.flags = xdl_opts;
- memset(&xecfg, 0, sizeof(xecfg));
- xecfg.ctxlen = context;
- ecb.outf = xdiff_outf;
- ecb.priv = &state;
- memset(&state, 0, sizeof(state));
- state.xm.consume = process_u_diff;
- state.ret = xmalloc(sizeof(struct patch));
- state.ret->chunks = NULL;
- state.ret->num = 0;
-
- xdi_diff(file_p, file_o, &xpp, &xecfg, &ecb);
-
- if (state.ret->num) {
- struct chunk *chunk;
- chunk = &state.ret->chunks[state.ret->num - 1];
- chunk->p_next -= state.hunk_post_context;
- chunk->t_next -= state.hunk_post_context;
- }
- return state.ret;
-}
-
-/*
- * Run diff between two origins and grab the patch output, so that
- * we can pass blame for lines origin is currently suspected for
- * to its parent.
- */
-static struct patch *get_patch(struct origin *parent, struct origin *origin)
-{
- mmfile_t file_p, file_o;
- struct patch *patch;
-
- fill_origin_blob(parent, &file_p);
- fill_origin_blob(origin, &file_o);
- if (!file_p.ptr || !file_o.ptr)
- return NULL;
- patch = compare_buffer(&file_p, &file_o, 0);
- num_get_patch++;
- return patch;
-}
-
-static void free_patch(struct patch *p)
-{
- free(p->chunks);
- free(p);
-}
-
-/*
* Link in a new blame entry to the scoreboard. Entries that cover the
* same line range have been removed from the scoreboard previously.
*/
@@ -817,6 +688,22 @@ static void blame_chunk(struct scoreboard *sb,
}
}
+struct blame_chunk_cb_data {
+ struct scoreboard *sb;
+ struct origin *target;
+ struct origin *parent;
+ long plno;
+ long tlno;
+};
+
+static void blame_chunk_cb(void *data, long same, long p_next, long t_next)
+{
+ struct blame_chunk_cb_data *d = data;
+ blame_chunk(d->sb, d->tlno, d->plno, same, d->target, d->parent);
+ d->plno = p_next;
+ d->tlno = t_next;
+}
+
/*
* We are looking at the origin 'target' and aiming to pass blame
* for the lines it is suspected to its parent. Run diff to find
@@ -826,26 +713,28 @@ static int pass_blame_to_parent(struct scoreboard *sb,
struct origin *target,
struct origin *parent)
{
- int i, last_in_target, plno, tlno;
- struct patch *patch;
+ int last_in_target;
+ mmfile_t file_p, file_o;
+ struct blame_chunk_cb_data d = { sb, target, parent, 0, 0 };
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
last_in_target = find_last_in_target(sb, target);
if (last_in_target < 0)
return 1; /* nothing remains for this target */
- patch = get_patch(parent, target);
- plno = tlno = 0;
- for (i = 0; i < patch->num; i++) {
- struct chunk *chunk = &patch->chunks[i];
+ fill_origin_blob(parent, &file_p);
+ fill_origin_blob(target, &file_o);
+ num_get_patch++;
- blame_chunk(sb, tlno, plno, chunk->same, target, parent);
- plno = chunk->p_next;
- tlno = chunk->t_next;
- }
+ memset(&xpp, 0, sizeof(xpp));
+ xpp.flags = xdl_opts;
+ memset(&xecfg, 0, sizeof(xecfg));
+ xecfg.ctxlen = 0;
+ xdi_diff_hunks(&file_p, &file_o, blame_chunk_cb, &d, &xpp, &xecfg);
/* The rest (i.e. anything after tlno) are the same as the parent */
- blame_chunk(sb, tlno, plno, last_in_target, target, parent);
+ blame_chunk(sb, d.tlno, d.plno, last_in_target, target, parent);
- free_patch(patch);
return 0;
}
@@ -937,6 +826,23 @@ static void handle_split(struct scoreboard *sb,
}
}
+struct handle_split_cb_data {
+ struct scoreboard *sb;
+ struct blame_entry *ent;
+ struct origin *parent;
+ struct blame_entry *split;
+ long plno;
+ long tlno;
+};
+
+static void handle_split_cb(void *data, long same, long p_next, long t_next)
+{
+ struct handle_split_cb_data *d = data;
+ handle_split(d->sb, d->ent, d->tlno, d->plno, same, d->parent, d->split);
+ d->plno = p_next;
+ d->tlno = t_next;
+}
+
/*
* Find the lines from parent that are the same as ent so that
* we can pass blames to it. file_p has the blob contents for
@@ -951,8 +857,9 @@ static void find_copy_in_blob(struct scoreboard *sb,
const char *cp;
int cnt;
mmfile_t file_o;
- struct patch *patch;
- int i, plno, tlno;
+ struct handle_split_cb_data d = { sb, ent, parent, split, 0, 0 };
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
/*
* Prepare mmfile that contains only the lines in ent.
@@ -967,24 +874,18 @@ static void find_copy_in_blob(struct scoreboard *sb,
}
file_o.size = cp - file_o.ptr;
- patch = compare_buffer(file_p, &file_o, 1);
-
/*
* file_o is a part of final image we are annotating.
* file_p partially may match that image.
*/
+ memset(&xpp, 0, sizeof(xpp));
+ xpp.flags = xdl_opts;
+ memset(&xecfg, 0, sizeof(xecfg));
+ xecfg.ctxlen = 1;
memset(split, 0, sizeof(struct blame_entry [3]));
- plno = tlno = 0;
- for (i = 0; i < patch->num; i++) {
- struct chunk *chunk = &patch->chunks[i];
-
- handle_split(sb, ent, tlno, plno, chunk->same, parent, split);
- plno = chunk->p_next;
- tlno = chunk->t_next;
- }
+ xdi_diff_hunks(file_p, &file_o, handle_split_cb, &d, &xpp, &xecfg);
/* remainder, if any, all match the preimage */
- handle_split(sb, ent, tlno, plno, ent->num_lines, parent, split);
- free_patch(patch);
+ handle_split(sb, ent, d.tlno, d.plno, ent->num_lines, parent, split);
}
/*
@@ -1435,7 +1336,7 @@ static void get_commit_info(struct commit *commit,
int detailed)
{
int len;
- char *tmp, *endp;
+ char *tmp, *endp, *reencoded, *message;
static char author_buf[1024];
static char committer_buf[1024];
static char summary_buf[1024];
@@ -1453,24 +1354,29 @@ static void get_commit_info(struct commit *commit,
die("Cannot read commit %s",
sha1_to_hex(commit->object.sha1));
}
+ reencoded = reencode_commit_message(commit, NULL);
+ message = reencoded ? reencoded : commit->buffer;
ret->author = author_buf;
- get_ac_line(commit->buffer, "\nauthor ",
+ get_ac_line(message, "\nauthor ",
sizeof(author_buf), author_buf, &ret->author_mail,
&ret->author_time, &ret->author_tz);
- if (!detailed)
+ if (!detailed) {
+ free(reencoded);
return;
+ }
ret->committer = committer_buf;
- get_ac_line(commit->buffer, "\ncommitter ",
+ get_ac_line(message, "\ncommitter ",
sizeof(committer_buf), committer_buf, &ret->committer_mail,
&ret->committer_time, &ret->committer_tz);
ret->summary = summary_buf;
- tmp = strstr(commit->buffer, "\n\n");
+ tmp = strstr(message, "\n\n");
if (!tmp) {
error_out:
sprintf(summary_buf, "(%s)", sha1_to_hex(commit->object.sha1));
+ free(reencoded);
return;
}
tmp += 2;
@@ -1482,6 +1388,7 @@ static void get_commit_info(struct commit *commit,
goto error_out;
memcpy(summary_buf, tmp, len);
summary_buf[len] = 0;
+ free(reencoded);
}
/*
@@ -2066,7 +1973,7 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
struct commit *commit;
struct origin *origin;
unsigned char head_sha1[20];
- struct strbuf buf;
+ struct strbuf buf = STRBUF_INIT;
const char *ident;
time_t now;
int size, len;
@@ -2086,11 +1993,9 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
origin = make_origin(commit, path);
- strbuf_init(&buf, 0);
if (!contents_from || strcmp("-", contents_from)) {
struct stat st;
const char *read_from;
- unsigned long fin_size;
if (contents_from) {
if (stat(contents_from, &st) < 0)
@@ -2102,7 +2007,6 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
die("Cannot lstat %s", path);
read_from = path;
}
- fin_size = xsize_t(st.st_size);
mode = canon_mode(st.st_mode);
switch (st.st_mode & S_IFMT) {
case S_IFREG:
@@ -2110,9 +2014,8 @@ static struct commit *fake_working_tree_commit(const char *path, const char *con
die("cannot open or read %s", read_from);
break;
case S_IFLNK:
- if (readlink(read_from, buf.buf, buf.alloc) != fin_size)
+ if (strbuf_readlink(&buf, read_from, st.st_size) < 0)
die("cannot readlink %s", read_from);
- buf.len = fin_size;
break;
default:
die("unsupported file type %s", read_from);