From 13e0f88d4aba326da9217c225d6ab5e642eb611d Mon Sep 17 00:00:00 2001 From: Jeff King Date: Tue, 21 Jun 2011 21:23:33 -0400 Subject: [PATCH] archive: refactor list of archive formats Most of the tar and zip code was nicely split out into two abstracted files which knew only about their specific formats. The entry point to this code was a single "write archive" function. However, as these basic formats grow more complex (e.g., by handling multiple file extensions and format names), a static list of the entry point functions won't be enough. Instead, let's provide a way for the tar and zip code to tell the main archive code what they support by registering archiver names and functions. Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- archive-tar.c | 16 +++++++++++++--- archive-zip.c | 13 ++++++++++++- archive.c | 33 +++++++++++++++++---------------- archive.h | 17 ++++++++++------- 4 files changed, 52 insertions(+), 27 deletions(-) diff --git a/archive-tar.c b/archive-tar.c index 1ab1a2caf..930375bf2 100644 --- a/archive-tar.c +++ b/archive-tar.c @@ -234,12 +234,10 @@ static int git_tar_config(const char *var, const char *value, void *cb) return 0; } -int write_tar_archive(struct archiver_args *args) +static int write_tar_archive(struct archiver_args *args) { int err = 0; - git_config(git_tar_config, NULL); - if (args->commit_sha1) err = write_global_extended_header(args); if (!err) @@ -248,3 +246,15 @@ int write_tar_archive(struct archiver_args *args) write_trailer(); return err; } + +static struct archiver tar_archiver = { + "tar", + write_tar_archive, + 0 +}; + +void init_tar_archiver(void) +{ + register_archiver(&tar_archiver); + git_config(git_tar_config, NULL); +} diff --git a/archive-zip.c b/archive-zip.c index cf285044e..a776d8359 100644 --- a/archive-zip.c +++ b/archive-zip.c @@ -261,7 +261,7 @@ static void dos_time(time_t *time, int *dos_date, int *dos_time) *dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048; } -int write_zip_archive(struct archiver_args *args) +static int write_zip_archive(struct archiver_args *args) { int err; @@ -278,3 +278,14 @@ int write_zip_archive(struct archiver_args *args) return err; } + +static struct archiver zip_archiver = { + "zip", + write_zip_archive, + ARCHIVER_WANT_COMPRESSION_LEVELS +}; + +void init_zip_archiver(void) +{ + register_archiver(&zip_archiver); +} diff --git a/archive.c b/archive.c index 2616676fc..f0b4e8551 100644 --- a/archive.c +++ b/archive.c @@ -14,16 +14,15 @@ static char const * const archive_usage[] = { NULL }; -#define USES_ZLIB_COMPRESSION 1 - -static const struct archiver { - const char *name; - write_archive_fn_t write_archive; - unsigned int flags; -} archivers[] = { - { "tar", write_tar_archive }, - { "zip", write_zip_archive, USES_ZLIB_COMPRESSION }, -}; +static const struct archiver **archivers; +static int nr_archivers; +static int alloc_archivers; + +void register_archiver(struct archiver *ar) +{ + ALLOC_GROW(archivers, nr_archivers + 1, alloc_archivers); + archivers[nr_archivers++] = ar; +} static void format_subst(const struct commit *commit, const char *src, size_t len, @@ -208,9 +207,9 @@ static const struct archiver *lookup_archiver(const char *name) if (!name) return NULL; - for (i = 0; i < ARRAY_SIZE(archivers); i++) { - if (!strcmp(name, archivers[i].name)) - return &archivers[i]; + for (i = 0; i < nr_archivers; i++) { + if (!strcmp(name, archivers[i]->name)) + return archivers[i]; } return NULL; } @@ -355,8 +354,8 @@ static int parse_archive_args(int argc, const char **argv, base = ""; if (list) { - for (i = 0; i < ARRAY_SIZE(archivers); i++) - printf("%s\n", archivers[i].name); + for (i = 0; i < nr_archivers; i++) + printf("%s\n", archivers[i]->name); exit(0); } @@ -369,7 +368,7 @@ static int parse_archive_args(int argc, const char **argv, args->compression_level = Z_DEFAULT_COMPRESSION; if (compression_level != -1) { - if ((*ar)->flags & USES_ZLIB_COMPRESSION) + if ((*ar)->flags & ARCHIVER_WANT_COMPRESSION_LEVELS) args->compression_level = compression_level; else { die("Argument not supported for format '%s': -%d", @@ -395,6 +394,8 @@ int write_archive(int argc, const char **argv, const char *prefix, prefix = setup_git_directory_gently(&nongit); git_config(git_default_config, NULL); + init_tar_archiver(); + init_zip_archiver(); argc = parse_archive_args(argc, argv, &ar, &args); if (nongit) { diff --git a/archive.h b/archive.h index 038ac353d..f39cede0c 100644 --- a/archive.h +++ b/archive.h @@ -14,15 +14,18 @@ struct archiver_args { int compression_level; }; -typedef int (*write_archive_fn_t)(struct archiver_args *); +#define ARCHIVER_WANT_COMPRESSION_LEVELS 1 +struct archiver { + const char *name; + int (*write_archive)(struct archiver_args *); + unsigned flags; +}; +extern void register_archiver(struct archiver *); -typedef int (*write_archive_entry_fn_t)(struct archiver_args *args, const unsigned char *sha1, const char *path, size_t pathlen, unsigned int mode, void *buffer, unsigned long size); +extern void init_tar_archiver(void); +extern void init_zip_archiver(void); -/* - * Archive-format specific backends. - */ -extern int write_tar_archive(struct archiver_args *); -extern int write_zip_archive(struct archiver_args *); +typedef int (*write_archive_entry_fn_t)(struct archiver_args *args, const unsigned char *sha1, const char *path, size_t pathlen, unsigned int mode, void *buffer, unsigned long size); extern int write_archive_entries(struct archiver_args *args, write_archive_entry_fn_t write_entry); extern int write_archive(int argc, const char **argv, const char *prefix, int setup_prefix); -- 2.26.2