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-rw-r--r--diff.c96
1 files changed, 95 insertions, 1 deletions
diff --git a/diff.c b/diff.c
index d10e848..04e7e91 100644
--- a/diff.c
+++ b/diff.c
@@ -1101,22 +1101,26 @@ static void emit_binary_diff(mmfile_t *one, mmfile_t *two)
static void setup_diff_attr_check(struct git_attr_check *check)
{
static struct git_attr *attr_diff;
+ static struct git_attr *attr_diff_func_name;
if (!attr_diff) {
attr_diff = git_attr("diff", 4);
+ attr_diff_func_name = git_attr("funcname", 8);
}
check[0].attr = attr_diff;
+ check[1].attr = attr_diff_func_name;
}
static void diff_filespec_check_attr(struct diff_filespec *one)
{
- struct git_attr_check attr_diff_check[1];
+ struct git_attr_check attr_diff_check[2];
if (one->checked_attr)
return;
setup_diff_attr_check(attr_diff_check);
one->is_binary = 0;
+ one->hunk_header_ident = NULL;
if (!git_checkattr(one->path, ARRAY_SIZE(attr_diff_check), attr_diff_check)) {
const char *value;
@@ -1127,6 +1131,13 @@ static void diff_filespec_check_attr(struct diff_filespec *one)
;
else if (ATTR_FALSE(value))
one->is_binary = 1;
+
+ /* hunk header ident */
+ value = attr_diff_check[1].value;
+ if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value))
+ ;
+ else
+ one->hunk_header_ident = value;
}
if (!one->data && DIFF_FILE_VALID(one))
@@ -1143,6 +1154,82 @@ int diff_filespec_is_binary(struct diff_filespec *one)
return one->is_binary;
}
+static struct hunk_header_regexp {
+ char *name;
+ char *regexp;
+ struct hunk_header_regexp *next;
+} *hunk_header_regexp_list, **hunk_header_regexp_tail;
+
+static int hunk_header_config(const char *var, const char *value)
+{
+ static const char funcname[] = "funcname.";
+ struct hunk_header_regexp *hh;
+
+ if (prefixcmp(var, funcname))
+ return 0;
+ var += strlen(funcname);
+ for (hh = hunk_header_regexp_list; hh; hh = hh->next)
+ if (!strcmp(var, hh->name)) {
+ free(hh->regexp);
+ hh->regexp = xstrdup(value);
+ return 0;
+ }
+ hh = xcalloc(1, sizeof(*hh));
+ hh->name = xstrdup(var);
+ hh->regexp = xstrdup(value);
+ hh->next = NULL;
+ *hunk_header_regexp_tail = hh;
+ return 0;
+}
+
+static const char *hunk_header_regexp(const char *ident)
+{
+ struct hunk_header_regexp *hh;
+
+ if (!hunk_header_regexp_tail) {
+ hunk_header_regexp_tail = &hunk_header_regexp_list;
+ git_config(hunk_header_config);
+ }
+ for (hh = hunk_header_regexp_list; hh; hh = hh->next)
+ if (!strcmp(ident, hh->name))
+ return hh->regexp;
+ return NULL;
+}
+
+static const char *diff_hunk_header_regexp(struct diff_filespec *one)
+{
+ const char *ident, *regexp;
+
+ diff_filespec_check_attr(one);
+ ident = one->hunk_header_ident;
+
+ if (!ident)
+ /*
+ * If the config file has "funcname.default" defined, that
+ * regexp is used; otherwise NULL is returned and xemit uses
+ * the built-in default.
+ */
+ return hunk_header_regexp("default");
+
+ /* Look up custom "funcname.$ident" regexp from config. */
+ regexp = hunk_header_regexp(ident);
+ if (regexp)
+ return regexp;
+
+ /*
+ * And define built-in fallback patterns here. Note that
+ * these can be overriden by the user's config settings.
+ */
+ if (!strcmp(ident, "java"))
+ return "!^[ ]*\\(catch\\|do\\|for\\|if\\|instanceof\\|"
+ "new\\|return\\|switch\\|throw\\|while\\)\n"
+ "^[ ]*\\(\\([ ]*"
+ "[A-Za-z_][A-Za-z_0-9]*\\)\\{2,\\}"
+ "[ ]*([^;]*$\\)";
+
+ return NULL;
+}
+
static void builtin_diff(const char *name_a,
const char *name_b,
struct diff_filespec *one,
@@ -1217,6 +1304,11 @@ static void builtin_diff(const char *name_a,
xdemitconf_t xecfg;
xdemitcb_t ecb;
struct emit_callback ecbdata;
+ const char *hunk_header_regexp;
+
+ hunk_header_regexp = diff_hunk_header_regexp(one);
+ if (!hunk_header_regexp)
+ hunk_header_regexp = diff_hunk_header_regexp(two);
memset(&xecfg, 0, sizeof(xecfg));
memset(&ecbdata, 0, sizeof(ecbdata));
@@ -1226,6 +1318,8 @@ static void builtin_diff(const char *name_a,
xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
xecfg.ctxlen = o->context;
xecfg.flags = XDL_EMIT_FUNCNAMES;
+ if (hunk_header_regexp)
+ xdiff_set_find_func(&xecfg, hunk_header_regexp);
if (!diffopts)
;
else if (!prefixcmp(diffopts, "--unified="))