From fc24af91954e41b0dd1eaed18154376921a9a6ba Mon Sep 17 00:00:00 2001
From: id101010 <aaron@duckpond.ch>
Date: Thu, 10 Nov 2016 02:48:25 +0100
Subject: [PATCH] Started work on the debugger

---
 bfckr.c                     | 55 +++++++++++++++++++++++++++++++++++--
 examples/{test.bf => pi.bf} |  0
 2 files changed, 53 insertions(+), 2 deletions(-)
 rename examples/{test.bf => pi.bf} (100%)

diff --git a/bfckr.c b/bfckr.c
index 784afba..417d0ba 100644
--- a/bfckr.c
+++ b/bfckr.c
@@ -16,6 +16,7 @@
 // Amount of memory on the band tape
 #define MEMORY_SIZE     10000
 #define MAX_INPUT_SIZE  10000
+#define clear()         printf("\033[H\033[J")
 
 // Memory initialized with zeros and its pointer
 char memory[MEMORY_SIZE] = {0};
@@ -37,8 +38,54 @@ void die(const char *message)
     exit(EXIT_FAILURE);
 }
 
+// Prints the bf source at the current location
+void print_sourceviewer()
+{
+    printf("Source viewer:"
+           "-----------------------------------------------------------"
+           "_____________________________>+++++++++++++++[<+>>>>>>>>+++"
+           "                             ^                             "
+           "                             ip=0                          "
+           "-----------------------------------------------------------"); // just to get the idea ...
+}
+
+// Prints memory information at the current memory location
+void print_memoryviewer()
+{
+    int pointerlocation = (p - memory)*sizeof(*memory); // find the arrayindex at which the pointer is pointing
+
+    printf("Memory viewer:                                             "
+           "-----------------------------------------------------------"
+           "000 000 000 000 000 000 001 001 000 000 000 000 000 000 000"
+           "                             ^                             "
+           "                            mp=1                           "
+           "249 250 251 252 253 254 000 001 002 003 004 005 006 007 008"
+           "-----------------------------------------------------------"); // just to get the idea ...
+}
+
+// Pauses the program flow and prints information
+void bfuck_debugger(char *bf_source_input, int instructionpointer)
+{
+    clear(); // clear terminal
+
+    printf("[s]: single step [c]: continue");
+
+    print_sourceviewer();
+    print_memoryviewer();
+
+    switch(getchar()) {
+    case 's':
+        // single step
+        break;
+    case 'c':
+        // continue
+        break;
+    }
+
+}
+
 // Parses and executes a brainfuck expression
-void bfuck_parser(char *input)
+void bfuck_execute(char *input)
 {
     int loop = 0;
 
@@ -117,6 +164,10 @@ void bfuck_parser(char *input)
             }
             break;
 
+        case '#':
+            // Breakpoint reached, start debugger ...
+            break;
+
         default:
             // Do nothing
             break;
@@ -150,7 +201,7 @@ int main(int argc, char* argv[])
     fclose(fp);
 
     // try to interpret it
-    bfuck_parser(input);
+    bfuck_execute(input);
 
     // exit
     exit(EXIT_SUCCESS);
diff --git a/examples/test.bf b/examples/pi.bf
similarity index 100%
rename from examples/test.bf
rename to examples/pi.bf