diff options
Diffstat (limited to 'third_party/git/attr.h')
| -rw-r--r-- | third_party/git/attr.h | 141 |
1 files changed, 7 insertions, 134 deletions
diff --git a/third_party/git/attr.h b/third_party/git/attr.h index 404548f028..b0378bfe5f 100644 --- a/third_party/git/attr.h +++ b/third_party/git/attr.h @@ -1,121 +1,9 @@ #ifndef ATTR_H #define ATTR_H -/** - * gitattributes mechanism gives a uniform way to associate various attributes - * to set of paths. - * - * - * Querying Specific Attributes - * ---------------------------- - * - * - Prepare `struct attr_check` using attr_check_initl() function, enumerating - * the names of attributes whose values you are interested in, terminated with - * a NULL pointer. Alternatively, an empty `struct attr_check` can be - * prepared by calling `attr_check_alloc()` function and then attributes you - * want to ask about can be added to it with `attr_check_append()` function. - * - * - Call `git_check_attr()` to check the attributes for the path. - * - * - Inspect `attr_check` structure to see how each of the attribute in the - * array is defined for the path. - * - * - * Example - * ------- - * - * To see how attributes "crlf" and "ident" are set for different paths. - * - * - Prepare a `struct attr_check` with two elements (because we are checking - * two attributes): - * - * ------------ - * static struct attr_check *check; - * static void setup_check(void) - * { - * if (check) - * return; // already done - * check = attr_check_initl("crlf", "ident", NULL); - * } - * ------------ - * - * - Call `git_check_attr()` with the prepared `struct attr_check`: - * - * ------------ - * const char *path; - * - * setup_check(); - * git_check_attr(path, check); - * ------------ - * - * - Act on `.value` member of the result, left in `check->items[]`: - * - * ------------ - * const char *value = check->items[0].value; - * - * if (ATTR_TRUE(value)) { - * The attribute is Set, by listing only the name of the - * attribute in the gitattributes file for the path. - * } else if (ATTR_FALSE(value)) { - * The attribute is Unset, by listing the name of the - * attribute prefixed with a dash - for the path. - * } else if (ATTR_UNSET(value)) { - * The attribute is neither set nor unset for the path. - * } else if (!strcmp(value, "input")) { - * If none of ATTR_TRUE(), ATTR_FALSE(), or ATTR_UNSET() is - * true, the value is a string set in the gitattributes - * file for the path by saying "attr=value". - * } else if (... other check using value as string ...) { - * ... - * } - * ------------ - * - * To see how attributes in argv[] are set for different paths, only - * the first step in the above would be different. - * - * ------------ - * static struct attr_check *check; - * static void setup_check(const char **argv) - * { - * check = attr_check_alloc(); - * while (*argv) { - * struct git_attr *attr = git_attr(*argv); - * attr_check_append(check, attr); - * argv++; - * } - * } - * ------------ - * - * - * Querying All Attributes - * ----------------------- - * - * To get the values of all attributes associated with a file: - * - * - Prepare an empty `attr_check` structure by calling `attr_check_alloc()`. - * - * - Call `git_all_attrs()`, which populates the `attr_check` with the - * attributes attached to the path. - * - * - Iterate over the `attr_check.items[]` array to examine the attribute - * names and values. The name of the attribute described by an - * `attr_check.items[]` object can be retrieved via - * `git_attr_name(check->items[i].attr)`. (Please note that no items will be - * returned for unset attributes, so `ATTR_UNSET()` will return false for all - * returned `attr_check.items[]` objects.) - * - * - Free the `attr_check` struct by calling `attr_check_free()`. - */ - struct index_state; -/** - * An attribute is an opaque object that is identified by its name. Pass the - * name to `git_attr()` function to obtain the object of this type. - * The internal representation of this structure is of no interest to the - * calling programs. The name of the attribute can be retrieved by calling - * `git_attr_name()`. - */ +/* An attribute is a pointer to this opaque structure */ struct git_attr; /* opaque structures used internally for attribute collection */ @@ -133,36 +21,21 @@ const struct git_attr *git_attr(const char *); extern const char git_attr__true[]; extern const char git_attr__false[]; -/** - * Attribute Values - * ---------------- - * - * An attribute for a path can be in one of four states: Set, Unset, Unspecified - * or set to a string, and `.value` member of `struct attr_check_item` records - * it. The three macros check these, if none of them returns true, `.value` - * member points at a string value of the attribute for the path. - */ - -/* Returns true if the attribute is Set for the path. */ +/* For public to check git_attr_check results */ #define ATTR_TRUE(v) ((v) == git_attr__true) - -/* Returns true if the attribute is Unset for the path. */ #define ATTR_FALSE(v) ((v) == git_attr__false) - -/* Returns true if the attribute is Unspecified for the path. */ #define ATTR_UNSET(v) ((v) == NULL) -/* This structure represents one attribute and its value. */ +/* + * Send one or more git_attr_check to git_check_attrs(), and + * each 'value' member tells what its value is. + * Unset one is returned as NULL. + */ struct attr_check_item { const struct git_attr *attr; const char *value; }; -/** - * This structure represents a collection of `attr_check_item`. It is passed to - * `git_check_attr()` function, specifying the attributes to check, and - * receives their values. - */ struct attr_check { int nr; int alloc; |