Stub out most of stdio on AltOS

[fw/pdclib] / platform / altos / functions / stdio / fgets.c

diff --git a/platform/altos/functions/stdio/fgets.c b/platform/altos/functions/stdio/fgets.c
new file mode 100644 (file)
index 0000000..5fd05f7
--- /dev/null
+++ b/platform/altos/functions/stdio/fgets.c
@@ -0,0 +1,79 @@
+/* $Id$ */
+
+/* fgets( char *, int, 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>
+
+#ifndef REGTEST
+
+char * fgets( char * _PDCLIB_restrict s, int size, struct _PDCLIB_file_t * _PDCLIB_restrict stream )
+{
+    if ( size == 0 )
+    {
+        return NULL;
+    }
+    if ( size == 1 )
+    {
+        *s = '\0';
+        return s;
+    }
+    char * dest = s;
+    for (;;) {
+       int c = getc(stream);
+       if (c == EOF)
+           break;
+       *dest++ = c;
+       if (c == '\n')
+           break;
+       if (--size <= 0)
+           break;
+    }
+    *dest = '\0';
+    return ( dest == s ) ? NULL : s;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+#include <string.h>
+
+int main( void )
+{
+    FILE * fh;
+    char buffer[10];
+    char const * fgets_test = "foo\nbar\0baz\nweenie";
+    TESTCASE( ( fh = fopen( testfile, "wb+" ) ) != NULL );
+    TESTCASE( fwrite( fgets_test, 1, 18, fh ) == 18 );
+    rewind( fh );
+    TESTCASE( fgets( buffer, 10, fh ) == buffer );
+    TESTCASE( strcmp( buffer, "foo\n" ) == 0 );
+    TESTCASE( fgets( buffer, 10, fh ) == buffer );
+    TESTCASE( memcmp( buffer, "bar\0baz\n", 8 ) == 0 );
+    TESTCASE( fgets( buffer, 10, fh ) == buffer );
+    TESTCASE( strcmp( buffer, "weenie" ) == 0 );
+    TESTCASE( feof( fh ) );
+    TESTCASE( fseek( fh, -1, SEEK_END ) == 0 );
+    TESTCASE( fgets( buffer, 1, fh ) == buffer );
+    TESTCASE( strcmp( buffer, "" ) == 0 );
+    TESTCASE( fgets( buffer, 0, fh ) == NULL );
+    TESTCASE( ! feof( fh ) );
+    TESTCASE( fgets( buffer, 1, fh ) == buffer );
+    TESTCASE( strcmp( buffer, "" ) == 0 );
+    TESTCASE( ! feof( fh ) );
+    TESTCASE( fgets( buffer, 2, fh ) == buffer );
+    TESTCASE( strcmp( buffer, "e" ) == 0 );
+    TESTCASE( fseek( fh, 0, SEEK_END ) == 0 );
+    TESTCASE( fgets( buffer, 2, fh ) == NULL );
+    TESTCASE( feof( fh ) );
+    TESTCASE( fclose( fh ) == 0 );
+    TESTCASE( remove( testfile ) == 0 );
+    return TEST_RESULTS;
+}
+
+#endif
+