Code ready, needs debug

.vscode/c_cpp_properties.json

@@ -0,0 +1,18 @@
+{
+  "configurations": [
+    {
+      "name": "linux-gcc-x64",
+      "includePath": [
+        "${workspaceFolder}/**"
+      ],
+      "compilerPath": "/usr/bin/gcc",
+      "cStandard": "${default}",
+      "cppStandard": "${default}",
+      "intelliSenseMode": "linux-gcc-x64",
+      "compilerArgs": [
+        ""
+      ]
+    }
+  ],
+  "version": 4
+}

.vscode/launch.json

@@ -0,0 +1,24 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "C/C++ Runner: Debug Session",
+      "type": "cppdbg",
+      "request": "launch",
+      "args": [],
+      "stopAtEntry": false,
+      "externalConsole": false,
+      "cwd": "/home/luxdragon/Documents/QBoy",
+      "program": "/home/luxdragon/Documents/QBoy/build/Debug/outDebug",
+      "MIMode": "gdb",
+      "miDebuggerPath": "gdb",
+      "setupCommands": [
+        {
+          "description": "Enable pretty-printing for gdb",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        }
+      ]
+    }
+  ]
+}

.vscode/settings.json

@@ -0,0 +1,59 @@
+{
+  "C_Cpp_Runner.cCompilerPath": "gcc",
+  "C_Cpp_Runner.cppCompilerPath": "g++",
+  "C_Cpp_Runner.debuggerPath": "gdb",
+  "C_Cpp_Runner.cStandard": "",
+  "C_Cpp_Runner.cppStandard": "",
+  "C_Cpp_Runner.msvcBatchPath": "C:/Program Files/Microsoft Visual Studio/VR_NR/Community/VC/Auxiliary/Build/vcvarsall.bat",
+  "C_Cpp_Runner.useMsvc": false,
+  "C_Cpp_Runner.warnings": [
+    "-Wall",
+    "-Wextra",
+    "-Wpedantic",
+    "-Wshadow",
+    "-Wformat=2",
+    "-Wcast-align",
+    "-Wconversion",
+    "-Wsign-conversion",
+    "-Wnull-dereference"
+  ],
+  "C_Cpp_Runner.msvcWarnings": [
+    "/W4",
+    "/permissive-",
+    "/w14242",
+    "/w14287",
+    "/w14296",
+    "/w14311",
+    "/w14826",
+    "/w44062",
+    "/w44242",
+    "/w14905",
+    "/w14906",
+    "/w14263",
+    "/w44265",
+    "/w14928"
+  ],
+  "C_Cpp_Runner.enableWarnings": true,
+  "C_Cpp_Runner.warningsAsError": false,
+  "C_Cpp_Runner.compilerArgs": [],
+  "C_Cpp_Runner.linkerArgs": [],
+  "C_Cpp_Runner.includePaths": [],
+  "C_Cpp_Runner.includeSearch": [
+    "*",
+    "**/*"
+  ],
+  "C_Cpp_Runner.excludeSearch": [
+    "**/build",
+    "**/build/**",
+    "**/.*",
+    "**/.*/**",
+    "**/.vscode",
+    "**/.vscode/**"
+  ],
+  "C_Cpp_Runner.useAddressSanitizer": false,
+  "C_Cpp_Runner.useUndefinedSanitizer": false,
+  "C_Cpp_Runner.useLeakSanitizer": false,
+  "C_Cpp_Runner.showCompilationTime": false,
+  "C_Cpp_Runner.useLinkTimeOptimization": false,
+  "C_Cpp_Runner.msvcSecureNoWarnings": false
+}

disassembler.c

@@ -1,8 +1,10 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <cjson/cJSON.h>
+#include <string.h> // for easier work with cJSON
 
 // How to compile? Like this!
-// gcc disassembler.c -o disassembler
+// gcc -o disassembler disassembler.c -lcjson
 
 // Large chunks of the code are from my Intel 8080 emulator
 
@@ -31,19 +33,81 @@ buffer* read_file(char** argv) {
     return b;
 }
 
+cJSON* read_cjson() {
+    FILE *fs = fopen("Opcodes.json", "rb");
+    if (fs = NULL) {
+        printf("ERROR: Unable to open the Opcodes.json file.\n");
+        return NULL;
+    }
+  
+    // read the file contents into a string 
+    fseek(fs, 0L, SEEK_END);
+    int fsize = ftell(fs);
+    fseek(fs, 0L, SEEK_SET);
+
+    buffer *b = malloc(sizeof(buffer));
+    b->buffer = malloc(fsize);
+    b->length = fsize;
+
+    fread(b->buffer, fsize, 1, fs);
+    fclose(fs);
+  
+    // parse the JSON data 
+    cJSON *json = cJSON_Parse(b->buffer);
+    if (json == NULL) {
+        const char *error_ptr = cJSON_GetErrorPtr();
+        if (error_ptr != NULL) {
+            printf("Error: %s\n", error_ptr);
+        }
+        cJSON_Delete(json);
+        return NULL;
+    }
+    free(b);
+    return json;
+}
+
 void print_buffer(buffer* b) {
     for (int i = 0; i < 40; i++) {
         printf("%02x \n", b->buffer[i]);
     }
 }
 
-int disassemble8080(buffer* b, int pc) {
+int disassemble8080(buffer* b, int pc, cJSON* json) {
     unsigned char *code = &(b->buffer[pc]);
     int opbytes = 1;
     printf("%04x ", pc);
+    char mnemonic[10];
 
-    // Will parse the opcodes.json for this
-    // To be done after the MMT blog post
+    // Here begins the cJSON part
+
+    cJSON *unprefixed = cJSON_GetObjectItem(json, "unprefixed");
+    if (unprefixed == NULL) {
+        printf("Error: 'unprefixed' not found in JSON.\n");
+        return 0; // We don't want to continue
+    }
+    cJSON *command = cJSON_GetObjectItem(unprefixed, code);
+    if (command == NULL) {
+        printf("Error: Command with opcode %s not found.\n", opcode);
+        return 0;
+    }
+    cJSON *mnemonic_item = cJSON_GetObjectItem(command, "mnemonic");
+    cJSON *bytes_item = cJSON_GetObjectItem(command, "bytes");
+
+
+    if (mnemonic_item != NULL && cJSON_IsString(mnemonic_item)) {
+        strcpy(mnemonic, mnemonic_item->valuestring);
+    }
+
+    if (bytes_item != NULL && cJSON_IsNumber(bytes_item)) {
+        *bytes = bytes_item->valueint;
+    }
+    // Here ends the cJSON part
+    printf("%d\n", opbytes);
+    printf("%s\n", mnemonic);
+
+    if (opbytes > 5 || opbytes < 1) {
+        opbytes = 1;
+    } 
     printf("\n");
     return opbytes;
 }
@@ -59,10 +123,19 @@ int main (int argc, char** argv)  {
         return 1;
     }
     print_buffer(buff);
+    JSON *json = read_cjson();
+
+    if (json == NULL) {
+        printf("main terminated\n");
+        return 1;
+    }
+
+
     while (pc < 400) {//buff->length) {
-        pc += disassemble8080(buff, pc);
+        pc += disassemble8080(buff, pc, json);
     }
     free(buff);
+    cJSON_Delete(json); // basically free(json)
     return 0;
 
 }