Addressed ticket #40 (non-standard errno values).

[pdclib] / functions / stdio / perror.c

diff --git a/functions/stdio/perror.c b/functions/stdio/perror.c
index c59ca0b290a582934f50c3b4a467002915a4a527..23ce68bd356cc11e997dcdabf4873b32156b2204 100644 (file)
--- a/functions/stdio/perror.c
+++ b/functions/stdio/perror.c
@@ -10,9 +10,24 @@
 
 #ifndef REGTEST
 
+#include <errno.h>
+#include <locale.h>
+
+/* TODO: Doing this via a static array is not the way to do it. */
 void perror( const char * s )
 {
-    /* TODO: Implement. */
+    if ( ( s != NULL ) && ( s[0] != '\n' ) )
+    {
+        fprintf( stderr, "%s: ", s );
+    }
+    if ( errno >= _PDCLIB_ERRNO_MAX )
+    {
+        fprintf( stderr, "Unknown error\n" );
+    }
+    else
+    {
+        fprintf( stderr, "%s\n", _PDCLIB_lconv._PDCLIB_errno_texts[errno] );
+    }
     return;
 }
 
@@ -20,10 +35,24 @@ void perror( const char * s )
 
 #ifdef TEST
 #include <_PDCLIB_test.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
 
 int main( void )
 {
-    TESTCASE( NO_TESTDRIVER );
+    FILE * fh;
+    unsigned long long max = ULLONG_MAX;
+    char buffer[100];
+    sprintf( buffer, "%llu", max );
+    TESTCASE( ( fh = freopen( testfile, "wb+", stderr ) ) != NULL );
+    TESTCASE( strtol( buffer, NULL, 10 ) == LONG_MAX );
+    perror( "Test" );
+    rewind( fh );
+    TESTCASE( fread( buffer, 1, 7, fh ) == 7 );
+    TESTCASE( memcmp( buffer, "Test: ", 6 ) == 0 );
+    TESTCASE( fclose( fh ) == 0 );
+    TESTCASE( remove( testfile ) == 0 );
     return TEST_RESULTS;
 }