builtin/apply: move 'apply_in_reverse' global into 'struct apply_state'

To libify the apply functionality the 'apply_in_reverse' variable should
not be static and global to the file. Let's move it into
'struct apply_state'.

Reviewed-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/apply.c b/builtin/apply.c
index 769383cd5dd3161ddc62d2a0451f2728dd48a97f..796d9909105c2029fc6cb88d23a8f0a05fa595b6 100644 (file)
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -30,6 +30,7 @@ struct apply_state {
        int check_index; /* preimage must match the indexed version */
 
        /* These boolean parameters control how the apply is done */
+       int apply_in_reverse;
        int unidiff_zero;
 };
 
@@ -49,7 +50,6 @@ static int diffstat;
 static int numstat;
 static int summary;
 static int apply = 1;
-static int apply_in_reverse;
 static int apply_with_reject;
 static int apply_verbosely;
 static int allow_overlap;
@@ -1556,8 +1556,11 @@ static void check_whitespace(const char *line, int len, unsigned ws_rule)
  * between a "---" that is part of a patch, and a "---" that starts
  * the next patch is to look at the line counts..
  */
-static int parse_fragment(const char *line, unsigned long size,
-                         struct patch *patch, struct fragment *fragment)
+static int parse_fragment(struct apply_state *state,
+                         const char *line,
+                         unsigned long size,
+                         struct patch *patch,
+                         struct fragment *fragment)
 {
        int added, deleted;
        int len = linelen(line, size), offset;
@@ -1597,12 +1600,12 @@ static int parse_fragment(const char *line, unsigned long size,
                        if (!deleted && !added)
                                leading++;
                        trailing++;
-                       if (!apply_in_reverse &&
+                       if (!state->apply_in_reverse &&
                            ws_error_action == correct_ws_error)
                                check_whitespace(line, len, patch->ws_rule);
                        break;
                case '-':
-                       if (apply_in_reverse &&
+                       if (state->apply_in_reverse &&
                            ws_error_action != nowarn_ws_error)
                                check_whitespace(line, len, patch->ws_rule);
                        deleted++;
@@ -1610,7 +1613,7 @@ static int parse_fragment(const char *line, unsigned long size,
                        trailing = 0;
                        break;
                case '+':
-                       if (!apply_in_reverse &&
+                       if (!state->apply_in_reverse &&
                            ws_error_action != nowarn_ws_error)
                                check_whitespace(line, len, patch->ws_rule);
                        added++;
@@ -1666,7 +1669,10 @@ static int parse_fragment(const char *line, unsigned long size,
  * The (fragment->patch, fragment->size) pair points into the memory given
  * by the caller, not a copy, when we return.
  */
-static int parse_single_patch(const char *line, unsigned long size, struct patch *patch)
+static int parse_single_patch(struct apply_state *state,
+                             const char *line,
+                             unsigned long size,
+                             struct patch *patch)
 {
        unsigned long offset = 0;
        unsigned long oldlines = 0, newlines = 0, context = 0;
@@ -1678,7 +1684,7 @@ static int parse_single_patch(const char *line, unsigned long size, struct patch
 
                fragment = xcalloc(1, sizeof(*fragment));
                fragment->linenr = state_linenr;
-               len = parse_fragment(line, size, patch, fragment);
+               len = parse_fragment(state, line, size, patch, fragment);
                if (len <= 0)
                        die(_("corrupt patch at line %d"), state_linenr);
                fragment->patch = line;
@@ -2008,8 +2014,10 @@ static int parse_chunk(struct apply_state *state, char *buffer, unsigned long si
                                                 ? patch->new_name
                                                 : patch->old_name);
 
-       patchsize = parse_single_patch(buffer + offset + hdrsize,
-                                      size - offset - hdrsize, patch);
+       patchsize = parse_single_patch(state,
+                                      buffer + offset + hdrsize,
+                                      size - offset - hdrsize,
+                                      patch);
 
        if (!patchsize) {
                static const char git_binary[] = "GIT binary patch\n";
@@ -2741,7 +2749,7 @@ static int apply_one_fragment(struct apply_state *state,
                if (len < size && patch[len] == '\\')
                        plen--;
                first = *patch;
-               if (apply_in_reverse) {
+               if (state->apply_in_reverse) {
                        if (first == '-')
                                first = '+';
                        else if (first == '+')
@@ -2914,7 +2922,7 @@ static int apply_one_fragment(struct apply_state *state,
 
                if (apply_verbosely && applied_pos != pos) {
                        int offset = applied_pos - pos;
-                       if (apply_in_reverse)
+                       if (state->apply_in_reverse)
                                offset = 0 - offset;
                        fprintf_ln(stderr,
                                   Q_("Hunk #%d succeeded at %d (offset %d line).",
@@ -2948,7 +2956,9 @@ static int apply_one_fragment(struct apply_state *state,
        return (applied_pos < 0);
 }
 
-static int apply_binary_fragment(struct image *img, struct patch *patch)
+static int apply_binary_fragment(struct apply_state *state,
+                                struct image *img,
+                                struct patch *patch)
 {
        struct fragment *fragment = patch->fragments;
        unsigned long len;
@@ -2961,7 +2971,7 @@ static int apply_binary_fragment(struct image *img, struct patch *patch)
                             patch->old_name);
 
        /* Binary patch is irreversible without the optional second hunk */
-       if (apply_in_reverse) {
+       if (state->apply_in_reverse) {
                if (!fragment->next)
                        return error("cannot reverse-apply a binary patch "
                                     "without the reverse hunk to '%s'",
@@ -2994,7 +3004,9 @@ static int apply_binary_fragment(struct image *img, struct patch *patch)
  * but the preimage prepared by the caller in "img" is freed here
  * or in the helper function apply_binary_fragment() this calls.
  */
-static int apply_binary(struct image *img, struct patch *patch)
+static int apply_binary(struct apply_state *state,
+                       struct image *img,
+                       struct patch *patch)
 {
        const char *name = patch->old_name ? patch->old_name : patch->new_name;
        unsigned char sha1[20];
@@ -3055,7 +3067,7 @@ static int apply_binary(struct image *img, struct patch *patch)
                 * apply the patch data to it, which is stored
                 * in the patch->fragments->{patch,size}.
                 */
-               if (apply_binary_fragment(img, patch))
+               if (apply_binary_fragment(state, img, patch))
                        return error(_("binary patch does not apply to '%s'"),
                                     name);
 
@@ -3078,7 +3090,7 @@ static int apply_fragments(struct apply_state *state, struct image *img, struct
        int nth = 0;
 
        if (patch->is_binary)
-               return apply_binary(img, patch);
+               return apply_binary(state, img, patch);
 
        while (frag) {
                nth++;
@@ -4417,7 +4429,7 @@ static int apply_patch(struct apply_state *state,
                        free_patch(patch);
                        break;
                }
-               if (apply_in_reverse)
+               if (state->apply_in_reverse)
                        reverse_patches(patch);
                if (use_patch(state, patch)) {
                        patch_stats(patch);
@@ -4615,7 +4627,7 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
                { OPTION_CALLBACK, 0, "ignore-whitespace", NULL, NULL,
                        N_("ignore changes in whitespace when finding context"),
                        PARSE_OPT_NOARG, option_parse_space_change },
-               OPT_BOOL('R', "reverse", &apply_in_reverse,
+               OPT_BOOL('R', "reverse", &state.apply_in_reverse,
                        N_("apply the patch in reverse")),
                OPT_BOOL(0, "unidiff-zero", &state.unidiff_zero,
                        N_("don't expect at least one line of context")),