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apply: make parse_git_diff_header public

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Make 'parse_git_header()' (renamed to 'parse_git_diff_header()') a
"public" function in apply.h, so we can re-use it in range-diff in a
subsequent commit.  We're renaming the function to make it clearer in
other parts of the codebase that we're talking about a diff header and
not just any header.

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Thomas Gummerer 2019-07-11 17:08:44 +01:00 committed by Junio C Hamano
parent 80e1841232
commit ef283b3699
2 changed files with 67 additions and 50 deletions
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69
apply.c
View File

@ -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) {
@ -1320,12 +1286,13 @@ static int check_header_line(int linenr, struct patch *patch)
return 0;
}
/* 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_diff_header(struct strbuf *root,
int *linenr,
int p_value,
const char *line,
int len,
unsigned int size,
struct patch *patch)
{
unsigned long offset;
struct gitdiff_data parse_hdr_state;
@ -1340,21 +1307,21 @@ 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 gitdiff_data *, const char *, struct patch *);
@ -1391,7 +1358,7 @@ 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 +1539,9 @@ 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_diff_header(&state->root, &state->linenr,
state->p_value, line, len,
size, patch);
if (git_hdr_len < 0)
return -128;
if (git_hdr_len <= len)

48
apply.h
View File

@ -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 git diff 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_diff_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().