Move database handling utility functions

Move splitname, checkdbdir, get_pkgpath into db.{h,c} as these will be
needed to parse both the local and sync databases during the initial
splitting.  They will be moved out of db.{h,c} at to more appropriate
locations at a later stage.

Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 77 insertions, 0 deletions

diff --git a/lib/libalpm/db.c b/lib/libalpm/db.c
index b61631a5..d2844f8b 100644
--- a/lib/libalpm/db.c
+++ b/lib/libalpm/db.c
@@ -562,4 +562,81 @@ pmdb_t *_alpm_db_register_sync(const char *treename)
 	return(db);
 }
 
+
+int splitname(const char *target, pmpkg_t *pkg)
+{
+	/* the format of a db entry is as follows:
+	 *    package-version-rel/
+	 * package name can contain hyphens, so parse from the back- go back
+	 * two hyphens and we have split the version from the name.
+	 */
+	char *tmp, *p, *q;
+
+	if(target == NULL || pkg == NULL) {
+		return(-1);
+	}
+	STRDUP(tmp, target, RET_ERR(PM_ERR_MEMORY, -1));
+	p = tmp + strlen(tmp);
+
+	/* do the magic parsing- find the beginning of the version string
+	 * by doing two iterations of same loop to lop off two hyphens */
+	for(q = --p; *q && *q != '-'; q--);
+	for(p = --q; *p && *p != '-'; p--);
+	if(*p != '-' || p == tmp) {
+		return(-1);
+	}
+
+	/* copy into fields and return */
+	if(pkg->version) {
+		FREE(pkg->version);
+	}
+	STRDUP(pkg->version, p+1, RET_ERR(PM_ERR_MEMORY, -1));
+	/* insert a terminator at the end of the name (on hyphen)- then copy it */
+	*p = '\0';
+	if(pkg->name) {
+		FREE(pkg->name);
+	}
+	STRDUP(pkg->name, tmp, RET_ERR(PM_ERR_MEMORY, -1));
+
+	free(tmp);
+	return(0);
+}
+
+
+/* TODO: move these two functions to be_local once be_sync no longer uses them */
+
+int checkdbdir(pmdb_t *db)
+{
+	struct stat buf;
+	const char *path = _alpm_db_path(db);
+
+	if(stat(path, &buf) != 0) {
+		_alpm_log(PM_LOG_DEBUG, "database dir '%s' does not exist, creating it\n",
+				path);
+		if(_alpm_makepath(path) != 0) {
+			RET_ERR(PM_ERR_SYSTEM, -1);
+		}
+	} else if(!S_ISDIR(buf.st_mode)) {
+		_alpm_log(PM_LOG_WARNING, _("removing invalid database: %s\n"), path);
+		if(unlink(path) != 0 || _alpm_makepath(path) != 0) {
+			RET_ERR(PM_ERR_SYSTEM, -1);
+		}
+	}
+	return(0);
+}
+
+/* Note: the return value must be freed by the caller */
+char *get_pkgpath(pmdb_t *db, pmpkg_t *info)
+{
+	size_t len;
+	char *pkgpath;
+	const char *dbpath;
+
+	dbpath = _alpm_db_path(db);
+	len = strlen(dbpath) + strlen(info->name) + strlen(info->version) + 3;
+	MALLOC(pkgpath, len, RET_ERR(PM_ERR_MEMORY, NULL));
+	sprintf(pkgpath, "%s%s-%s/", dbpath, info->name, info->version);
+	return(pkgpath);
+}
+
 /* vim: set ts=2 sw=2 noet: */