Exceptions.

1 files changed, 30 insertions, 1 deletions

diff --git a/lib/exceptions.c b/lib/exceptions.c
index 349e8a9..231ca63 100644
--- a/lib/exceptions.c
+++ b/lib/exceptions.c
@@ -4,6 +4,9 @@
 #include "config.h"
 #include "exceptions.h"
 
+char * contexts[128];
+int clevel = 0;
+
 char * Estrdup(char * o) {
         char * r;
         
@@ -22,8 +25,34 @@ void * Emalloc(size_t s) {
         return r;
 }
 
+void pushcontext(char * c) {
+	if (clevel == 128) {
+		exception(1, _("Too much error contexts during pushcontext()."));
+	}
+	contexts[clevel++] = Estrdup(c);
+}
+
+void popcontext(void) {
+	if (clevel == 0) {
+		exception(1, _("Error context empty, but popcontext() called."));
+	}
+	free(contexts[--clevel]);
+}
+
+void flushcontext(void) {
+	while (clevel) {
+		popcontext();
+	}
+}
+
 void exception(int level, char *msg)
 {
-        fprintf(stderr, "%s\n", msg);
+	int i;
+	
+	fprintf(stderr, "Error detected. Showing context.\n");
+	for (i = 0; i < clevel; i++) {
+		fprintf(stderr, " (%i) - %s\n", i, contexts[i]);
+	}
+        fprintf(stderr, "  Error description: %s\n", msg);
         exit(level);
 }