[PATCH v2 2/4] pathspec: do exact comparison on the leading non-wildcard part

[Nguyễn Thái Ngọc Duy]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 dir.c       | 18 +++++++++++++++++-
 dir.h       |  8 ++++++++
 tree-walk.c |  6 ++++--
 3 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/dir.c b/dir.c
index c391d46..f81e1d2 100644
--- a/dir.c
+++ b/dir.c
@@ -34,6 +34,21 @@ int fnmatch_icase(const char *pattern, const char *string, 
int flags)
        return fnmatch(pattern, string, flags | (ignore_case ? FNM_CASEFOLD : 
0));
 }
 
+inline int git_fnmatch(const char *pattern, const char *string,
+                      int flags, int prefix)
+{
+       int fnm_flags = 0;
+       if (flags & GFNM_PATHNAME)
+               fnm_flags |= FNM_PATHNAME;
+       if (prefix > 0) {
+               if (strncmp(pattern, string, prefix))
+                       return FNM_NOMATCH;
+               pattern += prefix;
+               string += prefix;
+       }
+       return fnmatch(pattern, string, fnm_flags);
+}
+
 static size_t common_prefix_len(const char **pathspec)
 {
        const char *n, *first;
@@ -230,7 +245,8 @@ static int match_pathspec_item(const struct pathspec_item 
*item, int prefix,
                        return MATCHED_RECURSIVELY;
        }
 
-       if (item->nowildcard_len < item->len && !fnmatch(match, name, 0))
+       if (item->nowildcard_len < item->len &&
+           !git_fnmatch(match, name, 0, item->nowildcard_len - prefix))
                return MATCHED_FNMATCH;
 
        return 0;
diff --git a/dir.h b/dir.h
index f5c89e3..0e8ae84 100644
--- a/dir.h
+++ b/dir.h
@@ -139,4 +139,12 @@ extern int strcmp_icase(const char *a, const char *b);
 extern int strncmp_icase(const char *a, const char *b, size_t count);
 extern int fnmatch_icase(const char *pattern, const char *string, int flags);
 
+/*
+ * The prefix part of pattern must not contains wildcards.
+ */
+#define GFNM_PATHNAME 1                /* similar to FNM_PATHNAME */
+
+extern int git_fnmatch(const char *pattern, const char *string,
+                      int flags, int prefix);
+
 #endif
diff --git a/tree-walk.c b/tree-walk.c
index af871c5..2fcf3c0 100644
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -627,7 +627,8 @@ enum interesting tree_entry_interesting(const struct 
name_entry *entry,
                                return entry_interesting;
 
                        if (item->nowildcard_len < item->len) {
-                               if (!fnmatch(match + baselen, entry->path, 0))
+                               if (!git_fnmatch(match + baselen, entry->path,
+                                                0, item->nowildcard_len - 
baselen))
                                        return entry_interesting;
 
                                /*
@@ -652,7 +653,8 @@ match_wildcards:
 
                strbuf_add(base, entry->path, pathlen);
 
-               if (!fnmatch(match, base->buf + base_offset, 0)) {
+               if (!git_fnmatch(match, base->buf + base_offset,
+                                0, item->nowildcard_len)) {
                        strbuf_setlen(base, base_offset + baselen);
                        return entry_interesting;
                }
-- 
1.8.0.rc2.23.g1fb49df

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