mirror of
https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
Merge branch 'mh/attr'
* mh/attr: Unroll the loop over passes Change while loop into for loop Determine the start of the states outside of the pass loop Change parse_attr() to take a pointer to struct attr_state Increment num_attr in parse_attr_line(), not parse_attr() Document struct match_attr Add a file comment
This commit is contained in:
commit
e5cfcb04e0
113
attr.c
113
attr.c
|
@ -1,3 +1,12 @@
|
|||
/*
|
||||
* Handle git attributes. See gitattributes(5) for a description of
|
||||
* the file syntax, and Documentation/technical/api-gitattributes.txt
|
||||
* for a description of the API.
|
||||
*
|
||||
* One basic design decision here is that we are not going to support
|
||||
* an insanely large number of attributes.
|
||||
*/
|
||||
|
||||
#define NO_THE_INDEX_COMPATIBILITY_MACROS
|
||||
#include "cache.h"
|
||||
#include "exec_cmd.h"
|
||||
|
@ -13,12 +22,7 @@ static const char git_attr__unknown[] = "(builtin)unknown";
|
|||
|
||||
static const char *attributes_file;
|
||||
|
||||
/*
|
||||
* The basic design decision here is that we are not going to have
|
||||
* insanely large number of attributes.
|
||||
*
|
||||
* This is a randomly chosen prime.
|
||||
*/
|
||||
/* This is a randomly chosen prime. */
|
||||
#define HASHSIZE 257
|
||||
|
||||
#ifndef DEBUG_ATTR
|
||||
|
@ -106,22 +110,26 @@ struct git_attr *git_attr(const char *name)
|
|||
return git_attr_internal(name, strlen(name));
|
||||
}
|
||||
|
||||
/*
|
||||
* .gitattributes file is one line per record, each of which is
|
||||
*
|
||||
* (1) glob pattern.
|
||||
* (2) whitespace
|
||||
* (3) whitespace separated list of attribute names, each of which
|
||||
* could be prefixed with '-' to mean "set to false", '!' to mean
|
||||
* "unset".
|
||||
*/
|
||||
|
||||
/* What does a matched pattern decide? */
|
||||
struct attr_state {
|
||||
struct git_attr *attr;
|
||||
const char *setto;
|
||||
};
|
||||
|
||||
/*
|
||||
* One rule, as from a .gitattributes file.
|
||||
*
|
||||
* If is_macro is true, then u.attr is a pointer to the git_attr being
|
||||
* defined.
|
||||
*
|
||||
* If is_macro is false, then u.pattern points at the filename pattern
|
||||
* to which the rule applies. (The memory pointed to is part of the
|
||||
* memory block allocated for the match_attr instance.)
|
||||
*
|
||||
* In either case, num_attr is the number of attributes affected by
|
||||
* this rule, and state is an array listing them. The attributes are
|
||||
* listed as they appear in the file (macros unexpanded).
|
||||
*/
|
||||
struct match_attr {
|
||||
union {
|
||||
char *pattern;
|
||||
|
@ -134,8 +142,15 @@ struct match_attr {
|
|||
|
||||
static const char blank[] = " \t\r\n";
|
||||
|
||||
/*
|
||||
* Parse a whitespace-delimited attribute state (i.e., "attr",
|
||||
* "-attr", "!attr", or "attr=value") from the string starting at src.
|
||||
* If e is not NULL, write the results to *e. Return a pointer to the
|
||||
* remainder of the string (with leading whitespace removed), or NULL
|
||||
* if there was an error.
|
||||
*/
|
||||
static const char *parse_attr(const char *src, int lineno, const char *cp,
|
||||
int *num_attr, struct match_attr *res)
|
||||
struct attr_state *e)
|
||||
{
|
||||
const char *ep, *equals;
|
||||
int len;
|
||||
|
@ -148,7 +163,7 @@ static const char *parse_attr(const char *src, int lineno, const char *cp,
|
|||
len = equals - cp;
|
||||
else
|
||||
len = ep - cp;
|
||||
if (!res) {
|
||||
if (!e) {
|
||||
if (*cp == '-' || *cp == '!') {
|
||||
cp++;
|
||||
len--;
|
||||
|
@ -160,9 +175,6 @@ static const char *parse_attr(const char *src, int lineno, const char *cp,
|
|||
return NULL;
|
||||
}
|
||||
} else {
|
||||
struct attr_state *e;
|
||||
|
||||
e = &(res->state[*num_attr]);
|
||||
if (*cp == '-' || *cp == '!') {
|
||||
e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET;
|
||||
cp++;
|
||||
|
@ -175,7 +187,6 @@ static const char *parse_attr(const char *src, int lineno, const char *cp,
|
|||
}
|
||||
e->attr = git_attr_internal(cp, len);
|
||||
}
|
||||
(*num_attr)++;
|
||||
return ep + strspn(ep, blank);
|
||||
}
|
||||
|
||||
|
@ -183,10 +194,9 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
|
|||
int lineno, int macro_ok)
|
||||
{
|
||||
int namelen;
|
||||
int num_attr;
|
||||
const char *cp, *name;
|
||||
int num_attr, i;
|
||||
const char *cp, *name, *states;
|
||||
struct match_attr *res = NULL;
|
||||
int pass;
|
||||
int is_macro;
|
||||
|
||||
cp = line + strspn(line, blank);
|
||||
|
@ -215,32 +225,35 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
|
|||
else
|
||||
is_macro = 0;
|
||||
|
||||
for (pass = 0; pass < 2; pass++) {
|
||||
/* pass 0 counts and allocates, pass 1 fills */
|
||||
num_attr = 0;
|
||||
cp = name + namelen;
|
||||
cp = cp + strspn(cp, blank);
|
||||
while (*cp) {
|
||||
cp = parse_attr(src, lineno, cp, &num_attr, res);
|
||||
if (!cp)
|
||||
return NULL;
|
||||
}
|
||||
if (pass)
|
||||
break;
|
||||
res = xcalloc(1,
|
||||
sizeof(*res) +
|
||||
sizeof(struct attr_state) * num_attr +
|
||||
(is_macro ? 0 : namelen + 1));
|
||||
if (is_macro)
|
||||
res->u.attr = git_attr_internal(name, namelen);
|
||||
else {
|
||||
res->u.pattern = (char *)&(res->state[num_attr]);
|
||||
memcpy(res->u.pattern, name, namelen);
|
||||
res->u.pattern[namelen] = 0;
|
||||
}
|
||||
res->is_macro = is_macro;
|
||||
res->num_attr = num_attr;
|
||||
states = name + namelen;
|
||||
states += strspn(states, blank);
|
||||
|
||||
/* First pass to count the attr_states */
|
||||
for (cp = states, num_attr = 0; *cp; num_attr++) {
|
||||
cp = parse_attr(src, lineno, cp, NULL);
|
||||
if (!cp)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
res = xcalloc(1,
|
||||
sizeof(*res) +
|
||||
sizeof(struct attr_state) * num_attr +
|
||||
(is_macro ? 0 : namelen + 1));
|
||||
if (is_macro)
|
||||
res->u.attr = git_attr_internal(name, namelen);
|
||||
else {
|
||||
res->u.pattern = (char *)&(res->state[num_attr]);
|
||||
memcpy(res->u.pattern, name, namelen);
|
||||
res->u.pattern[namelen] = 0;
|
||||
}
|
||||
res->is_macro = is_macro;
|
||||
res->num_attr = num_attr;
|
||||
|
||||
/* Second pass to fill the attr_states */
|
||||
for (cp = states, i = 0; *cp; i++) {
|
||||
cp = parse_attr(src, lineno, cp, &(res->state[i]));
|
||||
}
|
||||
|
||||
return res;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue