initial import

src/file.cc

@@ -0,0 +1,151 @@
+/*****************************************************************************
+ * Copyright 1994-2008, Elliot Mednick and Mark Hummel
+ * This file is part of Veriwell.
+ *
+ * Veriwell is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Veriwell is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Foobar; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *****************************************************************************/
+
+/* file.cc - file abstraction */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "file.h"
+#include "vtypes.h"
+
+
+namespace veriwell {
+File* File::stdin_ = new File(stdin);
+
+File::File(FILE* f) :
+    f(f), 
+    isBuffer(0), 
+    buffer(0), 
+    len(0), 
+    offset(0), 
+    own(0) 
+{
+} 
+
+File::File(char *buffer, int len, int own) :
+    f(0), 
+    isBuffer(1),
+    buffer(buffer), 
+    len(len), 
+    offset(0),
+    own(own) 
+{
+}
+
+File *File::fopen(const char *name, char *mode) 
+{
+    FILE* fin = ::fopen(name, mode);
+    if( !fin ) {
+    	return NULL;
+    }
+    return new File(fin);
+}
+
+File* File::Stdin() 
+{ 
+    return stdin_; 
+}
+
+void File::fclose() 
+{
+    if (!isBuffer) {
+        ::fclose(f);
+    } else if (own) {
+        free(buffer);
+    }
+    delete this;
+}
+
+int File::isatty() 
+{
+    return !isBuffer && ::isatty(fileno(f));
+}
+
+File* File::fopenbuf(char *buffer, int len) 
+{
+    return new File(buffer, len);
+}
+
+int File::fgetc() 
+{
+    int result = EOF;
+    if (isBuffer) {
+        if (offset < len) {
+    	result = buffer[offset++];
+        }
+    } else {
+        result = getc(f);
+    }
+    return result;
+}
+
+int File::fscanf(char *format, ...) 
+{
+    int result;
+    va_list args;
+    va_start(args, format);
+    if (isBuffer) {
+        /* fscanf not support on in memory buffers */
+        ASSERT(FALSE);;
+        result = 0;
+    } else {
+        result = vfscanf(f, format, args);
+    }
+    va_end(args);
+    return result;
+}
+int File::fungetc(int c) {
+    if (isBuffer) {
+        if (offset != 0 && c != EOF) {
+    	buffer[--offset] = c;
+    	return c;
+        } else {
+    	return EOF;
+        }
+    } else {
+        return ungetc(c, f);
+    }
+}
+char *File::fgets(char *s, int size) {
+    if (isBuffer) {
+        int i;
+        for (i = 0; i < size - 1; ++i) {
+    	     s[i] = fgetc();
+    	     if (s[i] == EOF) {
+    	         if (i == 0) {
+    	     	return NULL;
+    	         } else {
+    	     	break;
+    	         }
+    	     } else if (s[i] == '\n') {
+                 i++;
+    	         break;
+             }
+        }
+        s[i] = 0;
+        return s;
+    } else {
+        return::fgets(s, size, f);
+    }
+}
+
+}
+

src/file.h

@@ -0,0 +1,59 @@
+/*****************************************************************************
+ * Copyright 1994-2008, Elliot Mednick and Mark Hummel
+ * This file is part of Veriwell.
+ *
+ * Veriwell is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Veriwell is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Foobar; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *****************************************************************************/
+
+/* file.h - file abstraction */
+
+#ifndef FILE_H
+#define FILE_H
+
+#include <stdio.h>
+#include <stdarg.h>
+
+
+namespace veriwell {
+/*
+ * file class
+ */
+class File {
+    FILE *f;
+    int isBuffer;
+    int len;
+    char *buffer;
+    int offset;
+    int own;
+  public:
+    static File *stdin_;
+    static File *fopen(const char *name, char *mode);
+    static File* Stdin();
+    static File* fopenbuf(char *buffer, int len);
+    File(FILE * f);
+    File(char *buffer, int len, int own = 0);
+    void  fclose();
+    int   isatty();
+    int   fgetc();
+    int   fscanf(char *format, ...);
+    int   fungetc(int c);
+    char* fgets(char *s, int size);
+};
+
+} // namespace veriwell
+
+#endif				//FILE_H
+
+