summaryrefslogtreecommitdiff
path: root/src/util
diff options
context:
space:
mode:
authormidipix <writeonce@midipix.org>2024-05-26 14:41:33 +0000
committermidipix <writeonce@midipix.org>2024-05-26 14:41:33 +0000
commit6c8a81097fd305d428891377433d7d88ba1119fd (patch)
tree91f2b4fa467e1a7851e2a1fd3f8ccc1f2d50fe1b /src/util
parent94230e73b767a4acc02a98d4a2520631517f1a2a (diff)
downloadtpax-6c8a81097fd305d428891377433d7d88ba1119fd.tar.bz2
tpax-6c8a81097fd305d428891377433d7d88ba1119fd.tar.xz
library api's: _util_ (utility helper interfaces) namespace overhaul.
Diffstat (limited to 'src/util')
-rw-r--r--src/util/tpax_path_copy.c86
-rw-r--r--src/util/tpax_stat_compare.c41
2 files changed, 127 insertions, 0 deletions
diff --git a/src/util/tpax_path_copy.c b/src/util/tpax_path_copy.c
new file mode 100644
index 0000000..046ddde
--- /dev/null
+++ b/src/util/tpax_path_copy.c
@@ -0,0 +1,86 @@
+/**************************************************************/
+/* tpax: a topological pax implementation */
+/* Copyright (C) 2020--2024 SysDeer Technologies, LLC */
+/* Released under GPLv2 and GPLv3; see COPYING.TPAX. */
+/**************************************************************/
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#include <tpax/tpax.h>
+#include "tpax_driver_impl.h"
+
+int tpax_util_path_copy(
+ char * dstpath,
+ const char * srcpath,
+ size_t bufsize,
+ uint32_t flags,
+ size_t * nwritten)
+{
+ const char * src;
+ char * dst;
+ char * cap;
+
+ if (!bufsize) {
+ errno = ENOBUFS;
+ return -1;
+ }
+
+ src = srcpath;
+ dst = dstpath;
+ cap = &dst[bufsize];
+
+ if ((src[0] == '/') && (src[1] == '/') && (src[2] != '/')) {
+ *dst++ = *src++;
+ *dst++ = *src++;
+ }
+
+ if (flags & TPAX_DRIVER_PURE_PATH_OUTPUT)
+ if ((src[0] == '.') && (src[1] == '/'))
+ for (++src; *src=='/'; src++)
+ (void)0;
+
+ for (; *src; ) {
+ if ((src[0] == '.') && (src[1] == '.')) {
+ if ((src[2] == '/') || (src[2] == '\0')) {
+ if (flags & TPAX_DRIVER_STRICT_PATH_INPUT) {
+ errno = EINVAL;
+ return -1;
+ }
+ }
+ }
+
+ if (flags & TPAX_DRIVER_PURE_PATH_OUTPUT) {
+ if ((src[0] == '.') && (src[1] == '/') && (src[-1] == '/')) {
+ for (++src; *src=='/'; src++)
+ (void)0;
+
+ } else if ((src[0] == '/')) {
+ for (src++; *src=='/'; src++)
+ (void)0;
+
+ *dst++ = '/';
+
+ } else {
+ *dst++ = *src++;
+ }
+ } else {
+ *dst++ = *src++;
+ }
+
+ if (dst == cap) {
+ errno = ENOBUFS;
+ return -1;
+ }
+ }
+
+ if (nwritten)
+ *nwritten = dst - dstpath;
+
+ *dst = '\0';
+
+ return 0;
+}
diff --git a/src/util/tpax_stat_compare.c b/src/util/tpax_stat_compare.c
new file mode 100644
index 0000000..2de6922
--- /dev/null
+++ b/src/util/tpax_stat_compare.c
@@ -0,0 +1,41 @@
+/**************************************************************/
+/* tpax: a topological pax implementation */
+/* Copyright (C) 2020--2024 SysDeer Technologies, LLC */
+/* Released under GPLv2 and GPLv3; see COPYING.TPAX. */
+/**************************************************************/
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#include <tpax/tpax.h>
+#include "tpax_driver_impl.h"
+
+#define TPAX_STAT_COMPARE(member) \
+ if (src -> member - dst -> member) \
+ return (src -> member > dst -> member) \
+ ? (1) : (-1)
+
+int tpax_util_stat_compare(
+ const struct stat * src,
+ const struct stat * dst)
+{
+ TPAX_STAT_COMPARE(st_dev);
+ TPAX_STAT_COMPARE(st_ino);
+
+ TPAX_STAT_COMPARE(st_mode);
+ TPAX_STAT_COMPARE(st_uid);
+ TPAX_STAT_COMPARE(st_gid);
+
+ TPAX_STAT_COMPARE(st_rdev);
+ TPAX_STAT_COMPARE(st_size);
+ TPAX_STAT_COMPARE(st_blksize);
+ TPAX_STAT_COMPARE(st_blocks);
+
+ TPAX_STAT_COMPARE(st_mtim.tv_sec);
+ TPAX_STAT_COMPARE(st_mtim.tv_nsec);
+
+ return 0;
+}