1 files changed, 93 insertions, 0 deletions
diff --git a/src/pdclib/functions/stdio/fwrite.c b/src/pdclib/functions/stdio/fwrite.c
new file mode 100644
index 0000000..7958a50
--- /dev/null
+++ b/src/pdclib/functions/stdio/fwrite.c
@@ -0,0 +1,93 @@
+/* fwrite( const void *, size_t, size_t, FILE * )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdio.h>
+#include <string.h>
+
+#ifndef REGTEST
+
+#include "pdclib/_PDCLIB_glue.h"
+
+size_t fwrite( const void * _PDCLIB_restrict ptr, size_t size, size_t nmemb, struct _PDCLIB_file_t * _PDCLIB_restrict stream )
+{
+    _PDCLIB_size_t offset = 0;
+    /* TODO: lineend */
+    /* int lineend = 0; */
+    size_t nmemb_i;
+    if ( _PDCLIB_prepwrite( stream ) == EOF )
+    {
+        return 0;
+    }
+    for ( nmemb_i = 0; nmemb_i < nmemb; ++nmemb_i )
+    {
+        size_t size_i;
+        for ( size_i = 0; size_i < size; ++size_i )
+        {
+            if ( ( stream->buffer[ stream->bufidx++ ] = ((char*)ptr)[ nmemb_i * size + size_i ] ) == '\n' )
+            {
+                /* Remember last newline, in case we have to do a partial line-buffered flush */
+                offset = stream->bufidx;
+                /* lineend = true; */
+            }
+            if ( stream->bufidx == stream->bufsize )
+            {
+                if ( _PDCLIB_flushbuffer( stream ) == EOF )
+                {
+                    /* Returning number of objects completely buffered */
+                    return nmemb_i;
+                }
+                /* lineend = false; */
+            }
+        }
+    }
+    /* Fully-buffered streams are OK. Non-buffered streams must be flushed,
+       line-buffered streams only if there's a newline in the buffer.
+    */
+    switch ( stream->status & ( _IONBF | _IOLBF ) )
+    {
+        case _IONBF:
+            if ( _PDCLIB_flushbuffer( stream ) == EOF )
+            {
+                /* We are in a pinch here. We have an error, which requires a
+                   return value < nmemb. On the other hand, all objects have
+                   been written to buffer, which means all the caller had to
+                   do was removing the error cause, and re-flush the stream...
+                   Catch 22. We'll return a value one short, to indicate the
+                   error, and can't really do anything about the inconsistency.
+                */
+                return nmemb_i - 1;
+            }
+            break;
+        case _IOLBF:
+            {
+            size_t bufidx = stream->bufidx;
+            stream->bufidx = offset;
+            if ( _PDCLIB_flushbuffer( stream ) == EOF )
+            {
+                /* See comment above. */
+                stream->bufidx = bufidx;
+                return nmemb_i - 1;
+            }
+            stream->bufidx = bufidx - offset;
+            memmove( stream->buffer, stream->buffer + offset, stream->bufidx );
+            }
+    }
+    return nmemb_i;
+}
+
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    /* Testing covered by fread(). */
+    return TEST_RESULTS;
+}
+
+#endif