len.c File Reference

Implements the OP_LEN opcode for getting the length of arrays or strings in the VM. More...

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Functions
	if (a.type==VAL_STRING)
	free_value (a)
	push_value (vm, make_int(len))

Variables
case	OP_LEN
int	len = 0
	else
	break

Detailed Description

Implements the OP_LEN opcode for getting the length of arrays or strings in the VM.

This file handles the OP_LEN instruction, which retrieves the length of an array or string. The array or string is popped from the stack, and the length is pushed back.

Behavior:

• Pops the array or string from the stack.
• Retrieves the length of the array or string.
• Pushes the length onto the stack.

Error Handling:

• Exits with an error if the operand is not an array or string.

Example: // Bytecode: OP_LEN // Stack before: ["hello"] // Stack after: [5]

Author

Johannes Findeisen

Date

2025-09-16

Definition in file len.c.

Function Documentation

free_value()

free_value

(

a

)

if()

if

(

a.

type = = VAL_STRING

)

Definition at line 37 of file len.c.

push_value()

push_value	(	vm	,
		make_int(len)	)

Variable Documentation

break

break

Definition at line 48 of file len.c.

else

else

Initial value:

{

push_value(vm, make_int(0))

Definition at line 42 of file len.c.

len

int len = 0

Definition at line 36 of file len.c.

OP_LEN

case OP_LEN

Definition at line 34 of file len.c.