Cumulative update of merge-recursive in C

diff --git a/tree-diff.c b/tree-diff.c
index 0ef06a9e36f55c0caec51064f552decd8a58be13..1cdf8aa90850441d60553281a1928047563fe8a6 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -3,39 +3,7 @@
  */
 #include "cache.h"
 #include "diff.h"
-
-// What paths are we interested in?
-static int nr_paths = 0;
-static const char **paths = NULL;
-static int *pathlens = NULL;
-
-static void update_tree_entry(struct tree_desc *desc)
-{
-       void *buf = desc->buf;
-       unsigned long size = desc->size;
-       int len = strlen(buf) + 1 + 20;
-
-       if (size < len)
-               die("corrupt tree file");
-       desc->buf = buf + len;
-       desc->size = size - len;
-}
-
-static const unsigned char *extract(struct tree_desc *desc, const char **pathp, unsigned int *modep)
-{
-       void *tree = desc->buf;
-       unsigned long size = desc->size;
-       int len = strlen(tree)+1;
-       const unsigned char *sha1 = tree + len;
-       const char *path = strchr(tree, ' ');
-       unsigned int mode;
-
-       if (!path || size < len + 20 || sscanf(tree, "%o", &mode) != 1)
-               die("corrupt tree file");
-       *pathp = path+1;
-       *modep = DIFF_FILE_CANON_MODE(mode);
-       return sha1;
-}
+#include "tree.h"
 
 static char *malloc_base(const char *base, const char *path, int pathlen)
 {
@@ -56,8 +24,8 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
        const unsigned char *sha1, *sha2;
        int cmp, pathlen1, pathlen2;
 
-       sha1 = extract(t1, &path1, &mode1);
-       sha2 = extract(t2, &path2, &mode2);
+       sha1 = tree_entry_extract(t1, &path1, &mode1);
+       sha2 = tree_entry_extract(t2, &path2, &mode2);
 
        pathlen1 = strlen(path1);
        pathlen2 = strlen(path2);
@@ -99,24 +67,24 @@ static int compare_tree_entry(struct tree_desc *t1, struct tree_desc *t2, const
        return 0;
 }
 
-static int interesting(struct tree_desc *desc, const char *base)
+static int interesting(struct tree_desc *desc, const char *base, struct diff_options *opt)
 {
        const char *path;
        unsigned mode;
        int i;
        int baselen, pathlen;
 
-       if (!nr_paths)
+       if (!opt->nr_paths)
                return 1;
 
-       (void)extract(desc, &path, &mode);
+       (void)tree_entry_extract(desc, &path, &mode);
 
        pathlen = strlen(path);
        baselen = strlen(base);
 
-       for (i=0; i < nr_paths; i++) {
-               const char *match = paths[i];
-               int matchlen = pathlens[i];
+       for (i=0; i < opt->nr_paths; i++) {
+               const char *match = opt->paths[i];
+               int matchlen = opt->pathlens[i];
 
                if (baselen >= matchlen) {
                        /* If it doesn't match, move along... */
@@ -156,7 +124,7 @@ static int interesting(struct tree_desc *desc, const char *base)
 static void show_tree(struct diff_options *opt, const char *prefix, struct tree_desc *desc, const char *base)
 {
        while (desc->size) {
-               if (interesting(desc, base))
+               if (interesting(desc, base, opt))
                        show_entry(opt, prefix, desc, base);
                update_tree_entry(desc);
        }
@@ -167,7 +135,7 @@ static int show_entry(struct diff_options *opt, const char *prefix, struct tree_
 {
        unsigned mode;
        const char *path;
-       const unsigned char *sha1 = extract(desc, &path, &mode);
+       const unsigned char *sha1 = tree_entry_extract(desc, &path, &mode);
 
        if (opt->recursive && S_ISDIR(mode)) {
                char type[20];
@@ -176,7 +144,7 @@ static int show_entry(struct diff_options *opt, const char *prefix, struct tree_
                void *tree;
 
                tree = read_sha1_file(sha1, type, &inner.size);
-               if (!tree || strcmp(type, "tree"))
+               if (!tree || strcmp(type, tree_type))
                        die("corrupt tree sha %s", sha1_to_hex(sha1));
 
                inner.buf = tree;
@@ -194,11 +162,11 @@ static int show_entry(struct diff_options *opt, const char *prefix, struct tree_
 int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
 {
        while (t1->size | t2->size) {
-               if (nr_paths && t1->size && !interesting(t1, base)) {
+               if (opt->nr_paths && t1->size && !interesting(t1, base, opt)) {
                        update_tree_entry(t1);
                        continue;
                }
-               if (nr_paths && t2->size && !interesting(t2, base)) {
+               if (opt->nr_paths && t2->size && !interesting(t2, base, opt)) {
                        update_tree_entry(t2);
                        continue;
                }
@@ -234,10 +202,10 @@ int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const cha
        struct tree_desc t1, t2;
        int retval;
 
-       tree1 = read_object_with_reference(old, "tree", &t1.size, NULL);
+       tree1 = read_object_with_reference(old, tree_type, &t1.size, NULL);
        if (!tree1)
                die("unable to read source tree (%s)", sha1_to_hex(old));
-       tree2 = read_object_with_reference(new, "tree", &t2.size, NULL);
+       tree2 = read_object_with_reference(new, tree_type, &t2.size, NULL);
        if (!tree2)
                die("unable to read destination tree (%s)", sha1_to_hex(new));
        t1.buf = tree1;
@@ -256,15 +224,28 @@ static int count_paths(const char **paths)
        return i;
 }
 
-void diff_tree_setup_paths(const char **p)
+void diff_tree_release_paths(struct diff_options *opt)
+{
+       free(opt->pathlens);
+}
+
+void diff_tree_setup_paths(const char **p, struct diff_options *opt)
 {
+       opt->nr_paths = 0;
+       opt->pathlens = NULL;
+       opt->paths = NULL;
+
        if (p) {
                int i;
 
-               paths = p;
-               nr_paths = count_paths(paths);
-               pathlens = xmalloc(nr_paths * sizeof(int));
-               for (i=0; i<nr_paths; i++)
-                       pathlens[i] = strlen(paths[i]);
+               opt->paths = p;
+               opt->nr_paths = count_paths(p);
+               if (opt->nr_paths == 0) {
+                       opt->pathlens = NULL;
+                       return;
+               }
+               opt->pathlens = xmalloc(opt->nr_paths * sizeof(int));
+               for (i=0; i < opt->nr_paths; i++)
+                       opt->pathlens[i] = strlen(p[i]);
        }
 }