feat: Extended stdlib with string conversions, cmd input, and random

.gitignore

@@ -9,7 +9,7 @@ cmake-build-debug-coverage/
 build/
 
 # Testing file
-test.les
+test*.les
 
 # File system specific
 **/.DS_Store

src/liblesma/Backend/Codegen.cpp

@@ -1070,7 +1070,7 @@ llvm::Value *Codegen::visit(Literal *node) {
     else if (node->getType() == TokenType::STRING)
         return Builder->CreateGlobalStringPtr(node->getValue());
     else if (node->getType() == TokenType::NIL)
-        return ConstantPointerNull::get(PointerType::get(*TheContext, 0));
+        return ConstantPointerNull::getNullValue(Builder->getInt8PtrTy(0));
     else if (node->getType() == TokenType::IDENTIFIER) {
         // Look this variable up in the function.
         auto val = Scope->lookup(node->getValue());

src/std/base.les

@@ -1,8 +1,46 @@
 def extern printf(fmt: str, ...)
+def extern scanf(fmt: str, ...)
+def extern malloc(size: int) -> *void
+def extern strlen(x: str) -> int
+def extern atoll(x: str) -> int
+def extern strtod(x: str) -> float
+def extern rand() -> int
+def extern srand(x: int)
+def extern time(x: *int) -> int
+
+def input() -> str
+    return input("")
+
+def input(prompt: str) -> str
+    if strlen(prompt) > 0
+        printf("%s", prompt)
+
+    var line: str = malloc(256) as str
+
+    # TODO: Currently only reading 255 characters, could be longer
+    scanf("%255[^\n]%*c",line)
+
+    return line
+
+def strToInt(x: str) -> int
+    return atoll(x)
+
+def strToFloat(x: str) -> float
+    return strtod(x)
+
+def random(x: int, y: int) -> int
+    srand(time(null as *int))
+    if x < y
+        return x + rand() % (y - x)
+
+    return y + rand() % (x - y)
 
 def print(x: str)
     printf("%s\n", x)
 
+def print(x: int8)
+    printf("%c\n", x)
+
 def print(x: int)
     printf("%d\n", x)