From 8923a2006d821f5eecf36e1f9fa5ed29bb286d39 Mon Sep 17 00:00:00 2001
From: Garritt McCune <glmccune@gmail.com>
Date: Thu, 24 Oct 2024 20:58:09 -0500
Subject: [PATCH] Init

---
 .gitignore         |  2 +
 includes/opcodes.h | 22 +++++++++++
 src/main.c         |  5 +++
 src/opcodes.c      | 97 ++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 126 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 includes/opcodes.h
 create mode 100644 src/main.c
 create mode 100644 src/opcodes.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2477855
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.vscode/
+tags
diff --git a/includes/opcodes.h b/includes/opcodes.h
new file mode 100644
index 0000000..ee0481d
--- /dev/null
+++ b/includes/opcodes.h
@@ -0,0 +1,22 @@
+#ifndef OPCODES_H
+#define OPCODES_H
+
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+
+typedef enum {
+    R1 = 0, R2, R3, R4, R5, R6, R7, R8 = 7
+} Registers;
+
+typedef enum {
+    ADD = 0x01, SUB, MUL, DIV, AND, OR, XOR, NOT, SHL, SHR, NOP, CMP, JMP, JG, JL, 
+    OUTB, INB, HLT, ENI, INT, LIVT, PUSHA, POPA, CALL, RET, PUSH, POP
+} Mnemonic;
+
+int IsOpcode(const char*, Mnemonic*);
+int IsRegister(const char*, Registers*);
+void GetMnemonicText(Mnemonic mnemonic, char buffer[12]);
+void GetRegisterText(Registers reg, char buffer[3]);
+
+#endif
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..267b874
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+    printf("Hello World\n");
+}
\ No newline at end of file
diff --git a/src/opcodes.c b/src/opcodes.c
new file mode 100644
index 0000000..c9f03f3
--- /dev/null
+++ b/src/opcodes.c
@@ -0,0 +1,97 @@
+#include "../includes/opcodes.h"
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define OPCODECOUNT 34
+
+struct _instruction {
+    char* Name;
+    Mnemonic Mnemonic;
+};
+
+struct _instruction instructions[OPCODECOUNT] = {
+    { "copya", COPYA },
+    { "copyab", COPYAB },
+    { "copyra", COPYRA },
+    { "copyrab", COPYRAB },
+    { "copyrara", COPYRARA },
+    { "copyrarab", COPYRARAB },
+    { "copy", COPY },
+    { "copyi", COPYI },
+    { "copyb", COPYB },
+    { "cmp", CMP },
+    { "cmpi", CMPI },
+    { "add", ADD },
+    { "sub", SUB },
+    { "and", AND },
+    { "xor", XOR },
+    { "or", OR },
+    { "not", NOT },
+    { "shr", SHR },
+    { "shl", SHL },
+    { "inc", INC },
+    { "dec", DEC },
+    { "push", PUSH },
+    { "pop", POP },
+    { "jmpi", JMPI },
+    { "jmp", JMP },
+    { "jz", JZ },
+    { "jg", JG },
+    { "jl", JL },
+    { "nop", NOP },
+    { "call", CALL },
+    { "ret", RET }
+    //yld
+};
+
+void GetMnemonicText(Mnemonic mnemonic, char buffer[12]) {
+    memset(buffer, '\0', 12);
+
+    for(int i = 0; i < OPCODECOUNT; i++) {
+        if (instructions[i].Mnemonic == mnemonic) { 
+            strncpy(buffer, instructions[i].Name, 11);
+            break;
+        }
+    }
+}
+
+void GetRegisterText(Registers reg, char buffer[4]) {
+    memset(buffer, '\0', 4);
+
+    if (reg < R1 || reg > R8) return;
+
+    buffer[0] = 'r';
+    buffer[1] = reg + 49;
+}
+
+int IsOpcode(const char* text, Mnemonic* opcode) {
+    if (!text) return 0;
+
+    for(unsigned long i = 0; i < sizeof(instructions) / sizeof(struct _instruction); i++) {
+        if (strcmp(instructions[i].Name, text) == 0) {
+            if (opcode) *opcode = instructions[i].Mnemonic;
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+int IsRegister(const char* text, Registers* reg) {
+    if (!text) return 0;
+
+    int length = strlen(text);
+    Registers r = R8;
+
+    if (length != 2) return 0;
+    if (text[0] != 'r') return 0;
+
+    if (!isdigit(text[1])) return 0;
+
+    r = text[1] - 0x31;
+
+    if (reg) *reg = r;
+
+    return 1;
+}
\ No newline at end of file