[v2,07/14] apply: make parse_git_header public
diff mbox series

Message ID 20190705170630.27500-8-t.gummerer@gmail.com
State New
Headers show
Series
  • [v2,01/14] apply: replace marc.info link with public-inbox
Related show

Commit Message

Thomas Gummerer July 5, 2019, 5:06 p.m. UTC
Make parse_git_header a "public" function in apply.h, so we can re-use
it in range-diff in a subsequent commit.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
---

I considered creating a separate struct for only the metadata here,
and embedding that in 'struct patch'.  As struct patch is mostly
metadata fields though, I decided against that to avoid more code
churn here.

 apply.c | 68 ++++++++++++++++-----------------------------------------
 apply.h | 48 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 67 insertions(+), 49 deletions(-)

Comments

Johannes Schindelin July 5, 2019, 6:48 p.m. UTC | #1
Hi Thomas,

On Fri, 5 Jul 2019, Thomas Gummerer wrote:

> Make parse_git_header a "public" function in apply.h, so we can re-use
> it in range-diff in a subsequent commit.

This function probably wants a different name when it becomes public, as
it was relatively obvious inside `apply.c` that it was talking about a Git
_diff_ header. Maybe `parse_git_diff_header()`?

> @@ -127,6 +161,20 @@ int init_apply_state(struct apply_state *state,
>  void clear_apply_state(struct apply_state *state);
>  int check_apply_state(struct apply_state *state, int force_apply);
>
> +/*
> + * Parse a get header, starting at line.  Fills the relevant metadata

s/get/git/

Ciao,
Dscho

> + * information in 'struct patch'.
> + *
> + * Returns -1 on failure, the length of the parsed header otherwise.
> + */
> +int parse_git_header(struct strbuf *root,
> +		     int *linenr,
> +		     int p_value,
> +		     const char *line,
> +		     int len,
> +		     unsigned int size,
> +		     struct patch *patch);
> +
>  /*
>   * Some aspects of the apply behavior are controlled by the following
>   * bits in the "options" parameter passed to apply_all_patches().
> --
> 2.22.0.510.g264f2c817a
>
>

Patch
diff mbox series

diff --git a/apply.c b/apply.c
index 468f1d3fee..04319c233f 100644
--- a/apply.c
+++ b/apply.c
@@ -207,40 +207,6 @@  struct fragment {
 #define BINARY_DELTA_DEFLATED	1
 #define BINARY_LITERAL_DEFLATED 2
 
-/*
- * This represents a "patch" to a file, both metainfo changes
- * such as creation/deletion, filemode and content changes represented
- * as a series of fragments.
- */
-struct patch {
-	char *new_name, *old_name, *def_name;
-	unsigned int old_mode, new_mode;
-	int is_new, is_delete;	/* -1 = unknown, 0 = false, 1 = true */
-	int rejected;
-	unsigned ws_rule;
-	int lines_added, lines_deleted;
-	int score;
-	int extension_linenr; /* first line specifying delete/new/rename/copy */
-	unsigned int is_toplevel_relative:1;
-	unsigned int inaccurate_eof:1;
-	unsigned int is_binary:1;
-	unsigned int is_copy:1;
-	unsigned int is_rename:1;
-	unsigned int recount:1;
-	unsigned int conflicted_threeway:1;
-	unsigned int direct_to_threeway:1;
-	unsigned int crlf_in_old:1;
-	struct fragment *fragments;
-	char *result;
-	size_t resultsize;
-	char old_oid_prefix[GIT_MAX_HEXSZ + 1];
-	char new_oid_prefix[GIT_MAX_HEXSZ + 1];
-	struct patch *next;
-
-	/* three-way fallback result */
-	struct object_id threeway_stage[3];
-};
-
 static void free_fragment_list(struct fragment *list)
 {
 	while (list) {
@@ -1321,11 +1287,13 @@  static int check_header_line(int linenr, struct patch *patch)
 }
 
 /* Verify that we recognize the lines following a git header */
-static int parse_git_header(struct apply_state *state,
-			    const char *line,
-			    int len,
-			    unsigned int size,
-			    struct patch *patch)
+int parse_git_header(struct strbuf *root,
+		     int *linenr,
+		     int p_value,
+		     const char *line,
+		     int len,
+		     unsigned int size,
+		     struct patch *patch)
 {
 	unsigned long offset;
 	struct parse_git_header_state parse_hdr_state;
@@ -1340,21 +1308,21 @@  static int parse_git_header(struct apply_state *state,
 	 * or removing or adding empty files), so we get
 	 * the default name from the header.
 	 */
-	patch->def_name = git_header_name(state->p_value, line, len);
-	if (patch->def_name && state->root.len) {
-		char *s = xstrfmt("%s%s", state->root.buf, patch->def_name);
+	patch->def_name = git_header_name(p_value, line, len);
+	if (patch->def_name && root->len) {
+		char *s = xstrfmt("%s%s", root->buf, patch->def_name);
 		free(patch->def_name);
 		patch->def_name = s;
 	}
 
 	line += len;
 	size -= len;
-	state->linenr++;
-	parse_hdr_state.root = &state->root;
-	parse_hdr_state.linenr = state->linenr;
-	parse_hdr_state.p_value = state->p_value;
+	(*linenr)++;
+	parse_hdr_state.root = root;
+	parse_hdr_state.linenr = *linenr;
+	parse_hdr_state.p_value = p_value;
 
-	for (offset = len ; size > 0 ; offset += len, size -= len, line += len, state->linenr++) {
+	for (offset = len ; size > 0 ; offset += len, size -= len, line += len, (*linenr)++) {
 		static const struct opentry {
 			const char *str;
 			int (*fn)(struct parse_git_header_state *, const char *, struct patch *);
@@ -1391,7 +1359,7 @@  static int parse_git_header(struct apply_state *state,
 			res = p->fn(&parse_hdr_state, line + oplen, patch);
 			if (res < 0)
 				return -1;
-			if (check_header_line(state->linenr, patch))
+			if (check_header_line(*linenr, patch))
 				return -1;
 			if (res > 0)
 				return offset;
@@ -1572,7 +1540,9 @@  static int find_header(struct apply_state *state,
 		 * or mode change, so we handle that specially
 		 */
 		if (!memcmp("diff --git ", line, 11)) {
-			int git_hdr_len = parse_git_header(state, line, len, size, patch);
+			int git_hdr_len = parse_git_header(&state->root, &state->linenr,
+							   state->p_value, line, len,
+							   size, patch);
 			if (git_hdr_len < 0)
 				return -128;
 			if (git_hdr_len <= len)
diff --git a/apply.h b/apply.h
index 5948348133..e7a1586b17 100644
--- a/apply.h
+++ b/apply.h
@@ -117,6 +117,40 @@  struct apply_state {
 	int applied_after_fixing_ws;
 };
 
+/*
+ * This represents a "patch" to a file, both metainfo changes
+ * such as creation/deletion, filemode and content changes represented
+ * as a series of fragments.
+ */
+struct patch {
+	char *new_name, *old_name, *def_name;
+	unsigned int old_mode, new_mode;
+	int is_new, is_delete;	/* -1 = unknown, 0 = false, 1 = true */
+	int rejected;
+	unsigned ws_rule;
+	int lines_added, lines_deleted;
+	int score;
+	int extension_linenr; /* first line specifying delete/new/rename/copy */
+	unsigned int is_toplevel_relative:1;
+	unsigned int inaccurate_eof:1;
+	unsigned int is_binary:1;
+	unsigned int is_copy:1;
+	unsigned int is_rename:1;
+	unsigned int recount:1;
+	unsigned int conflicted_threeway:1;
+	unsigned int direct_to_threeway:1;
+	unsigned int crlf_in_old:1;
+	struct fragment *fragments;
+	char *result;
+	size_t resultsize;
+	char old_oid_prefix[GIT_MAX_HEXSZ + 1];
+	char new_oid_prefix[GIT_MAX_HEXSZ + 1];
+	struct patch *next;
+
+	/* three-way fallback result */
+	struct object_id threeway_stage[3];
+};
+
 int apply_parse_options(int argc, const char **argv,
 			struct apply_state *state,
 			int *force_apply, int *options,
@@ -127,6 +161,20 @@  int init_apply_state(struct apply_state *state,
 void clear_apply_state(struct apply_state *state);
 int check_apply_state(struct apply_state *state, int force_apply);
 
+/*
+ * Parse a get header, starting at line.  Fills the relevant metadata
+ * information in 'struct patch'.
+ *
+ * Returns -1 on failure, the length of the parsed header otherwise.
+ */
+int parse_git_header(struct strbuf *root,
+		     int *linenr,
+		     int p_value,
+		     const char *line,
+		     int len,
+		     unsigned int size,
+		     struct patch *patch);
+
 /*
  * Some aspects of the apply behavior are controlled by the following
  * bits in the "options" parameter passed to apply_all_patches().