Changeset 777832e in mainline for uspace/lib/c/generic/stdio.c

Timestamp:

2018-06-21T12:27:09Z (7 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

296890f3

Parents:

7d7bc09

git-author:

Jiri Svoboda <jiri@…> (2018-06-20 19:26:46)

git-committer:

Jiri Svoboda <jiri@…> (2018-06-21 12:27:09)

Message:

fgetpos, fsetpos, perror.

File:

• uspace/lib/c/generic/stdio.c (modified) (3 diffs)

uspace/lib/c/generic/stdio.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2017 Jiri Svoboda
+ * Copyright (c) 2018 Jiri Svoboda
  * All rights reserved.
  *
@@ -35 +35 @@
 #include <errno.h>
 #include <stdio.h>
+#include <str_error.h>
 #include <vfs/vfs.h>
+
+/** Get stream position.
+ *
+ * @param stream Stream
+ * @param pos Place to store position
+ *
+ * @return Zero on success, non-zero on failure
+ */
+int fgetpos(FILE *stream, fpos_t *pos)
+{
+        off64_t p;
+
+        p = ftell64(stream);
+        if (p < 0)
+                return -1;
+
+        pos->pos = p;
+        return 0;
+}
+
+/** Get stream position.
+ *
+ * @param stream Stream
+ * @param pos Position
+ *
+ * @return Zero on sucess, non-zero on failure
+ */
+int fsetpos(FILE *stream, const fpos_t *pos)
+{
+        int rc;
+
+        rc = fseek64(stream, pos->pos, SEEK_SET);
+        if (rc < 0)
+                return -1;
+
+        return 0;
+}
 
 /** Rename file or directory (C standard) */
@@ -65 +103 @@
 }
 
+/** Print error message and string representation of @c errno.
+ *
+ * @param s Error message
+ */
+void perror(const char *s)
+{
+        if (s != NULL && *s != '\0')
+                fprintf(stderr, "%s: %s\n", s, str_error(errno));
+        else
+                fprintf(stderr, "%s\n", str_error(errno));
+}
+
 /** @}
  */