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git/userdiff.h
Patrick Steinhardt c113c5df79 global: convert intentionally-leaking config strings to consts
There are multiple cases where we intentionally leak config strings:

  - `struct gpg_format` is used to track programs that can be used for
    signing commits, either via gpg(1), gpgsm(1) or ssh-keygen(1). The
    user can override the commands via several config variables. As the
    array is populated once, only, and the struct memers are never
    written to or free'd.

  - `struct ll_merge_driver` is used to track merge drivers. Same as
    with the GPG format, these drivers are populated once and then
    reused. Its data is never written to or free'd, either.

  - `struct userdiff_funcname` and `struct userdiff_driver` can be
    configured via `diff.<driver>.*` to add additional drivers. Again,
    these have a global lifetime and are never written to or free'd.

All of these are intentionally kept alive and are never written to.
Furthermore, all of these are being assigned both string constants in
some places, and allocated strings in other places. This will cause
warnings once we enable `-Wwrite-strings`, so let's mark the respective
fields as `const char *` and cast away the constness when assigning
those values.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-07 10:30:48 -07:00

53 lines
1.4 KiB
C

#ifndef USERDIFF_H
#define USERDIFF_H
#include "notes-cache.h"
struct index_state;
struct repository;
struct userdiff_funcname {
const char *pattern;
int cflags;
};
struct userdiff_driver {
const char *name;
const char *external;
const char *algorithm;
int binary;
struct userdiff_funcname funcname;
const char *word_regex;
const char *word_regex_multi_byte;
const char *textconv;
struct notes_cache *textconv_cache;
int textconv_want_cache;
};
enum userdiff_driver_type {
USERDIFF_DRIVER_TYPE_BUILTIN = 1<<0,
USERDIFF_DRIVER_TYPE_CUSTOM = 1<<1,
};
typedef int (*each_userdiff_driver_fn)(struct userdiff_driver *,
enum userdiff_driver_type, void *);
int userdiff_config(const char *k, const char *v);
struct userdiff_driver *userdiff_find_by_name(const char *name);
struct userdiff_driver *userdiff_find_by_path(struct index_state *istate,
const char *path);
/*
* Initialize any textconv-related fields in the driver and return it, or NULL
* if it does not have textconv enabled at all.
*/
struct userdiff_driver *userdiff_get_textconv(struct repository *r,
struct userdiff_driver *driver);
/*
* Iterate over all userdiff drivers. The userdiff_driver_type
* argument to each_userdiff_driver_fn indicates their type. Return
* non-zero to exit early from the loop.
*/
int for_each_userdiff_driver(each_userdiff_driver_fn, void *);
#endif /* USERDIFF */