Added helpers for error handling

Makefile

@@ -27,6 +27,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/src/array.c \
 		$(PACKAGE)-$(VERSION)/src/buffer.c \
 		$(PACKAGE)-$(VERSION)/src/config.c \
+		$(PACKAGE)-$(VERSION)/src/error.c \
 		$(PACKAGE)-$(VERSION)/src/event.c \
 		$(PACKAGE)-$(VERSION)/src/hash.c \
 		$(PACKAGE)-$(VERSION)/src/string.c \
@@ -39,6 +40,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/include/System/array.h \
 		$(PACKAGE)-$(VERSION)/include/System/buffer.h \
 		$(PACKAGE)-$(VERSION)/include/System/config.h \
+		$(PACKAGE)-$(VERSION)/include/System/error.h \
 		$(PACKAGE)-$(VERSION)/include/System/event.h \
 		$(PACKAGE)-$(VERSION)/include/System/file.h \
 		$(PACKAGE)-$(VERSION)/include/System/hash.h \

include/Makefile

@@ -27,6 +27,7 @@ install: all
 	$(INSTALL) -m 0644 System/array.h $(DESTDIR)$(INCLUDEDIR)/System/array.h
 	$(INSTALL) -m 0644 System/buffer.h $(DESTDIR)$(INCLUDEDIR)/System/buffer.h
 	$(INSTALL) -m 0644 System/config.h $(DESTDIR)$(INCLUDEDIR)/System/config.h
+	$(INSTALL) -m 0644 System/error.h $(DESTDIR)$(INCLUDEDIR)/System/error.h
 	$(INSTALL) -m 0644 System/event.h $(DESTDIR)$(INCLUDEDIR)/System/event.h
 	$(INSTALL) -m 0644 System/file.h $(DESTDIR)$(INCLUDEDIR)/System/file.h
 	$(INSTALL) -m 0644 System/hash.h $(DESTDIR)$(INCLUDEDIR)/System/hash.h
@@ -40,6 +41,7 @@ uninstall:
 	$(RM) $(DESTDIR)$(INCLUDEDIR)/System/array.h
 	$(RM) $(DESTDIR)$(INCLUDEDIR)/System/buffer.h
 	$(RM) $(DESTDIR)$(INCLUDEDIR)/System/config.h
+	$(RM) $(DESTDIR)$(INCLUDEDIR)/System/error.h
 	$(RM) $(DESTDIR)$(INCLUDEDIR)/System/event.h
 	$(RM) $(DESTDIR)$(INCLUDEDIR)/System/file.h
 	$(RM) $(DESTDIR)$(INCLUDEDIR)/System/hash.h

include/System.h

@@ -26,6 +26,7 @@
 # include "System/appserver.h"
 # include "System/buffer.h"
 # include "System/config.h"
+# include "System/error.h"
 # include "System/event.h"
 # include "System/file.h"
 # include "System/string.h"

include/System/error.h

@@ -0,0 +1,35 @@
+/* $Id$ */
+/* Copyright (c) 2007 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS System libSystem */
+/* libSystem is not free software; you can redistribute it and/or modify it
+ * under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike
+ * 3.0 Unported as published by the Creative Commons organization.
+ *
+ * libSystem 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 Creative Commons Attribution-NonCommercial-
+ * ShareAlike 3.0 Unported license for more details.
+ *
+ * You should have received a copy of the Creative Commons Attribution-
+ * NonCommercial-ShareAlike 3.0 along with libSystem; if not, browse to
+ * http://creativecommons.org/licenses/by-nc-sa/3.0/ */
+
+
+
+#ifndef LIBSYSTEM_ERROR_H
+# define LIBSYSTEM_ERROR_H
+
+
+/* functions */
+/* accessors */
+char const * error_get(void);
+char const * error_get_code(int * code);
+
+void error_set(char const * message);
+int error_set_code(char const * message, int code);
+int error_set_print(char const * prefix, char const * message, int code);
+
+/* useful */
+int error_print(char const * prefix);
+
+#endif /* !LIBSYSTEM_ERROR_H */

include/project.conf

@@ -1,3 +1,3 @@
 subdirs=System
-includes=System.h,System/appclient.h,System/appserver.h,System/array.h,System/buffer.h,System/config.h,System/event.h,System/file.h,System/hash.h,System/string.h
+includes=System.h,System/appclient.h,System/appserver.h,System/array.h,System/buffer.h,System/config.h,System/error.h,System/event.h,System/file.h,System/hash.h,System/string.h
 dist=Makefile

src/Makefile

@@ -16,7 +16,7 @@ INSTALL	= install
 
 all: $(TARGETS)
 
-libSystem_OBJS = appclient.o appinterface.o appserver.o array.o buffer.o config.o event.o hash.o string.o
+libSystem_OBJS = appclient.o appinterface.o appserver.o array.o buffer.o config.o error.o event.o hash.o string.o
 libSystem_CFLAGS = $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
 
 libSystem.a: $(libSystem_OBJS)
@@ -44,6 +44,9 @@ buffer.o: buffer.c
 config.o: config.c
 	$(CC) $(libSystem_CFLAGS) -c config.c
 
+error.o: error.c
+	$(CC) $(libSystem_CFLAGS) -c error.c
+
 event.o: event.c
 	$(CC) $(libSystem_CFLAGS) -c event.c
 

src/error.c

@@ -0,0 +1,92 @@
+/* $Id$ */
+/* Copyright (c) 2007 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS System libSystem */
+/* libSystem is not free software; you can redistribute it and/or modify it
+ * under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike
+ * 3.0 Unported as published by the Creative Commons organization.
+ *
+ * libSystem 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 Creative Commons Attribution-NonCommercial-
+ * ShareAlike 3.0 Unported license for more details.
+ *
+ * You should have received a copy of the Creative Commons Attribution-
+ * NonCommercial-ShareAlike 3.0 along with libSystem; if not, browse to
+ * http://creativecommons.org/licenses/by-nc-sa/3.0/ */
+
+
+
+#include <stdio.h>
+#include <string.h>
+#include "System.h"
+
+
+/* private */
+static char const * _error_do(char const * message, int * codeptr)
+{
+	static char buf[256] = "";
+	static int code = 0;
+
+	if(message != NULL) /* setting the error */
+	{
+		strncpy(buf, message, sizeof(buf) - 1);
+		buf[sizeof(buf) - 1] = '\0';
+		if(codeptr != NULL)
+			code = *codeptr;
+		return buf;
+	}
+	if(codeptr != NULL)
+		*codeptr = code;
+	return buf;
+}
+
+
+/* public */
+/* accessors */
+/* error_get */
+char const * error_get(void)
+{
+	return _error_do(NULL, NULL);
+}
+
+
+/* error_get_code */
+char const * error_get_code(int * code)
+{
+	return _error_do(NULL, code);
+}
+
+
+/* error_set */
+void error_set(char const * message)
+{
+	_error_do(message, NULL);
+}
+
+
+/* error_set_code */
+int error_set_code(char const * message, int code)
+{
+	_error_do(message, &code);
+	return code;
+}
+
+
+/* error_set_print */
+int error_set_print(char const * prefix, char const * message, int code)
+{
+	_error_do(message, &code);
+	return error_print(prefix);
+}
+
+
+/* useful */
+int error_print(char const * prefix)
+{
+	int code = 0;
+
+	if(prefix != NULL)
+		fputs(prefix, stderr);
+	fputs(_error_do(NULL, &code), stderr);
+	return code;
+}

src/project.conf

@@ -6,7 +6,7 @@ dist=Makefile,appinterface.h
 
 [libSystem]
 type=library
-sources=appclient.c,appinterface.c,appserver.c,array.c,buffer.c,config.c,event.c,hash.c,string.c
+sources=appclient.c,appinterface.c,appserver.c,array.c,buffer.c,config.c,error.c,event.c,hash.c,string.c
 
 [appclient.c]
 depends=appinterface.h