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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2022-06-01 14:21:56 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2022-06-02 17:26:53 +0200
commit9d474f278d21ddc452d8a1a722b3735fae94115c (patch)
treea47560294e37160e358cfd533f93c33ff0cc5f31 /lib/sqfs/dir_reader/dir_reader.c
parent653e24411937f9200ddfae9080f904a1d16d3366 (diff)
Cleanup: libsqfs: sqfs_dir_reader_find_by_path
Split out several repated patterns into helper functions and move the rest of the code back into dir_reader.c Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/sqfs/dir_reader/dir_reader.c')
-rw-r--r--lib/sqfs/dir_reader/dir_reader.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/lib/sqfs/dir_reader/dir_reader.c b/lib/sqfs/dir_reader/dir_reader.c
index d09e901..4ac9829 100644
--- a/lib/sqfs/dir_reader/dir_reader.c
+++ b/lib/sqfs/dir_reader/dir_reader.c
@@ -7,6 +7,17 @@
#define SQFS_BUILDING_DLL
#include "internal.h"
+static int inode_copy(const sqfs_inode_generic_t *inode,
+ sqfs_inode_generic_t **out)
+{
+ *out = alloc_flex(sizeof(*inode), 1, inode->payload_bytes_used);
+ if (*out == NULL)
+ return SQFS_ERROR_ALLOC;
+
+ memcpy(*out, inode, sizeof(*inode) + inode->payload_bytes_used);
+ return 0;
+}
+
static int dcache_key_compare(const void *ctx, const void *l, const void *r)
{
sqfs_u32 lhs = *((const sqfs_u32 *)l), rhs = *((const sqfs_u32 *)r);
@@ -310,3 +321,53 @@ int sqfs_dir_reader_get_root_inode(sqfs_dir_reader_t *rd,
return dcache_add(rd, *inode, rd->super->root_inode_ref);
}
+
+int sqfs_dir_reader_find_by_path(sqfs_dir_reader_t *rd,
+ const sqfs_inode_generic_t *start,
+ const char *path, sqfs_inode_generic_t **out)
+{
+ sqfs_inode_generic_t *inode;
+ const char *ptr;
+ int ret = 0;
+ char *name;
+
+ if (start == NULL) {
+ ret = sqfs_dir_reader_get_root_inode(rd, &inode);
+ } else {
+ ret = inode_copy(start, &inode);
+ }
+
+ if (ret)
+ return ret;
+
+ for (; *path != '\0'; path = ptr) {
+ if (*path == '/') {
+ for (ptr = path; *ptr == '/'; ++ptr)
+ ;
+ continue;
+ }
+
+ ret = sqfs_dir_reader_open_dir(rd, inode, 0);
+ free(inode);
+ if (ret)
+ return ret;
+
+ ptr = strchrnul(path, '/');
+
+ name = strndup(path, ptr - path);
+ if (name == NULL)
+ return SQFS_ERROR_ALLOC;
+
+ ret = sqfs_dir_reader_find(rd, name);
+ free(name);
+ if (ret)
+ return ret;
+
+ ret = sqfs_dir_reader_get_inode(rd, &inode);
+ if (ret)
+ return ret;
+ }
+
+ *out = inode;
+ return 0;
+}