Changeset 3b3e776 in mainline for uspace/lib/libc/generic/io/io.c

Timestamp:

2010-02-05T10:57:50Z (15 years ago)

Author:

Lenka Trochtova <trochtova.lenka@…>

Branches:

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

Children:

0358da0

Parents:

3f085132 (diff), b4cbef1 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

merged with head

File:

• uspace/lib/libc/generic/io/io.c (modified) (6 diffs)

uspace/lib/libc/generic/io/io.c

@@ -341 +341 @@
 size_t fread(void *buf, size_t size, size_t nmemb, FILE *stream)
 {
-        size_t left = size * nmemb;
-        size_t done = 0;
-        
+        size_t left, done;
+
+        if (size == 0 || nmemb == 0)
+                return 0;
+
         /* Make sure no data is pending write. */
         _fflushbuf(stream);
+
+        left = size * nmemb;
+        done = 0;
         
         while ((left > 0) && (!stream->error) && (!stream->eof)) {
@@ -365 +370 @@
 static size_t _fwrite(const void *buf, size_t size, size_t nmemb, FILE *stream)
 {
-        size_t left = size * nmemb;
-        size_t done = 0;
-        
+        size_t left;
+        size_t done;
+
+        if (size == 0 || nmemb == 0)
+                return 0;
+
+        left = size * nmemb;
+        done = 0;
+
         while ((left > 0) && (!stream->error)) {
                 ssize_t wr;
@@ -421 +432 @@
         uint8_t b;
         bool need_flush;
-        
+
+        if (size == 0 || nmemb == 0)
+                return 0;
+
         /* If not buffered stream, write out directly. */
         if (stream->btype == _IONBF) {
@@ -480 +494 @@
         
         if (chr_encode(c, buf, &sz, STR_BOUNDS(1)) == EOK) {
-                size_t wr = fwrite(buf, sz, 1, stream);
+                size_t wr = fwrite(buf, 1, sz, stream);
                 
                 if (wr < sz)
@@ -540 +554 @@
 }
 
+int ftell(FILE *stream)
+{
+        off_t rc = lseek(stream->fd, 0, SEEK_CUR);
+        if (rc == (off_t) (-1)) {
+                /* errno has been set by lseek. */
+                return -1;
+        }
+
+        return rc;
+}
+
 void rewind(FILE *stream)
 {
@@ -570 +595 @@
 }
 
+void clearerr(FILE *stream)
+{
+        stream->eof = false;
+        stream->error = false;
+}
+
 int fphone(FILE *stream)
 {