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authorLukas Fleischer <cgit@cryptocrack.de>2013-03-03 20:27:46 +0400
committerJason A. Donenfeld <Jason@zx2c4.com>2013-03-04 18:12:54 +0400
commit41f9c4e2f66252c83c6524fa4a346839d4c454b2 (patch)
tree2a80d6032308597cfebcf194f8860bf708bc13f4
parent973deda0eaf4e16c8cc0b25ca1bff1faae17584e (diff)
ui-blob.c: Use a context structure in walk_tree()
Do not misuse global variables to save the context. Instead, use the context pointer which was designed to share information between a read_tree_fn and the caller. This also prevents from potential misuse of the global pointers match_path and matched_sha1 after the referenced values have been overwritten on the stack. Signed-off-by: Lukas Fleischer <cgit@cryptocrack.de>
-rw-r--r--ui-blob.c42
1 files changed, 26 insertions, 16 deletions
diff --git a/ui-blob.c b/ui-blob.c
index d382ba3..c59fbcb 100644
--- a/ui-blob.c
+++ b/ui-blob.c
@@ -11,17 +11,22 @@
#include "html.h"
#include "ui-shared.h"
-static char *match_path;
-static unsigned char *matched_sha1;
-static int found_path;
+struct walk_tree_context {
+ char *match_path;
+ unsigned char *matched_sha1;
+ int found_path;
+};
static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
- const char *pathname, unsigned mode, int stage, void *cbdata) {
- if (strncmp(base, match_path, baselen)
- || strcmp(match_path + baselen, pathname))
+ const char *pathname, unsigned mode, int stage, void *cbdata)
+{
+ struct walk_tree_context *walk_tree_ctx = cbdata;
+
+ if (strncmp(base, walk_tree_ctx->match_path, baselen)
+ || strcmp(walk_tree_ctx->match_path + baselen, pathname))
return READ_TREE_RECURSIVE;
- memmove(matched_sha1, sha1, 20);
- found_path = 1;
+ memmove(walk_tree_ctx->matched_sha1, sha1, 20);
+ walk_tree_ctx->found_path = 1;
return 0;
}
@@ -40,16 +45,19 @@ int cgit_print_file(char *path, const char *head)
.nr = 1,
.items = &path_items
};
+ struct walk_tree_context walk_tree_ctx = {
+ .match_path = path,
+ .matched_sha1 = sha1,
+ .found_path = 0
+ };
+
if (get_sha1(head, sha1))
return -1;
type = sha1_object_info(sha1, &size);
if (type == OBJ_COMMIT && path) {
commit = lookup_commit_reference(sha1);
- match_path = path;
- matched_sha1 = sha1;
- found_path = 0;
- read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, NULL);
- if (!found_path)
+ read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
+ if (!walk_tree_ctx.found_path)
return -1;
type = sha1_object_info(sha1, &size);
}
@@ -78,6 +86,10 @@ void cgit_print_blob(const char *hex, char *path, const char *head)
.nr = 1,
.items = &path_items
};
+ struct walk_tree_context walk_tree_ctx = {
+ .match_path = path,
+ .matched_sha1 = sha1,
+ };
if (hex) {
if (get_sha1_hex(hex, sha1)) {
@@ -95,9 +107,7 @@ void cgit_print_blob(const char *hex, char *path, const char *head)
if ((!hex) && type == OBJ_COMMIT && path) {
commit = lookup_commit_reference(sha1);
- match_path = path;
- matched_sha1 = sha1;
- read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, NULL);
+ read_tree_recursive(commit->tree, "", 0, 0, &paths, walk_tree, &walk_tree_ctx);
type = sha1_object_info(sha1,&size);
}