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[!HAVE_DECL_GETENV]: Declare getenv.

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(backup_args): Reorder enum members.
(backup_types): Likewise.
(get_version): Take an additional parameter, `context'.
(xget_version): Like get_version, but if the `version' argument is NULL,
use the value of the envvar VERSION_CONTROL.
(base_name): Declare.
This commit is contained in:
Jim Meyering
1999-01-16 15:51:21 +00:00
parent ff5b4df30b
commit 306ea2b028
1 changed files with 40 additions and 10 deletions
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50
lib/backupfile.c
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@@ -64,6 +64,12 @@
char *malloc ();
#endif
#ifndef HAVE_DECL_GETENV
char *getenv ();
#endif
char *base_name PARAMS ((char const *));
#if HAVE_DIRENT_H || HAVE_NDIR_H || HAVE_SYS_DIR_H || HAVE_SYS_NDIR_H
# define HAVE_DIR 1
#else
@@ -214,25 +220,49 @@ version_number (const char *base, const char *backup, size_t base_length)
static const char * const backup_args[] =
{
"never", "simple", "nil", "existing", "t", "numbered", 0
/* In a series of synonyms, present the most meaning full first, so
that argmatch_valid be more readable. */
"none", "off",
"simple", "never",
"existing", "nil",
"numbered", "t",
0
};
static const enum backup_type backup_types[] =
{
simple, simple, numbered_existing, numbered_existing, numbered, numbered
none, none,
simple, simple,
numbered_existing, numbered_existing,
numbered, numbered
};
/* Return the type of backup indicated by VERSION.
Unique abbreviations are accepted. */
/* Return the type of backup specified by VERSION.
If VERSION is NULL or the empty string, return numbered_existing.
If VERSION is invalid or ambiguous, fail with a diagnostic appropriate
for the specified CONTEXT. Unambiguous abbreviations are accepted. */
enum backup_type
get_version (const char *version)
get_version (const char *context, const char *version)
{
enum backup_type type;
if (version == 0 || *version == 0)
type = numbered_existing;
return numbered_existing;
else
XARGMATCH (&type, "version control type", version,
backup_args, backup_types, exit (2));
return type;
return XARGMATCH (context, version, backup_args, backup_types);
}
/* Return the type of backup specified by VERSION.
If VERSION is NULL, use the value of the envvar VERSION_CONTROL.
If the specified string is invalid or ambiguous, fail with a diagnostic
appropriate for the specified CONTEXT.
Unambiguous abbreviations are accepted. */
enum backup_type
xget_version (const char *context, const char *version)
{
if (version && *version)
return get_version (context, version);
else
return get_version ("$VERSION_CONTROL", getenv ("VERSION_CONTROL"));
}