Working with text

[john113]

If I have a text buffer, and want to replace characters, how can I load letters one by one into a register to manipulate?

Please help...

[donkey]

Normally you would use a register to hold the pointer to the text buffer then mov the bytes in one at a time...

Code Select Expand

// Assuming MASM syntax here
// Use EDI as the pointer to your buffer
mov edi, offset TextBuffer
@@:
mov al, [edi]

// test to see if you're at the end of the buffer (for NULL terminated strings)
test al, al
jz @F
// The character is in AL, do what you want to it
....

// Put the character back in the same position in the string
mov [edi], al

// Next character
inc edi
jmp @B
@@: