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Improved a few methods in n65.rb

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Saf 2020-09-01 00:55:44 -07:00
parent c41f82bb93
commit 4b72970ee2
1 changed files with 4 additions and 10 deletions
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14
lib/n65.rb
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@ -131,7 +131,7 @@ module N65
# Assemble the given string # Assemble the given string
def assemble_string(string) def assemble_string(string)
string.split(/\n/).each do |line| string.split(/\n/).each do |line|
assemble_one_line(line) assemble_one_line(line)
end end
fulfill_promises fulfill_promises
@ -140,28 +140,22 @@ module N65
# This will empty out our promise queue and try to fullfil operations # This will empty out our promise queue and try to fullfil operations
# that required an undefined symbol when first encountered. # that required an undefined symbol when first encountered.
def fulfill_promises def fulfill_promises
while (promise = @promises.pop) @promises.pop.call while @promises.any?
promise.call
end
end end
# This rewinds the state of the assembler, so a promise can be # This rewinds the state of the assembler, so a promise can be
# executed with a previous state, for example if we can't resolve # executed with a previous state, for example if we can't resolve
# a symbol right now, and want to try during the second pass # a symbol right now, and want to try during the second pass
def with_saved_state(&block) def with_saved_state(&block)
## Save the current state of the assembler saved_state = get_current_state
old_state = get_current_state
lambda do lambda do
# Set the assembler state back to the old state and run the block like that set_current_state(saved_state)
set_current_state(old_state)
block.call(self) block.call(self)
end end
end end
# Write to memory space. Typically, we are going to want to write # Write to memory space. Typically, we are going to want to write
# to the location of the current PC, current segment, and current bank. # to the location of the current PC, current segment, and current bank.
# Bounds check is inside MemorySpace#write
def write_memory(bytes, pc = @program_counter, segment = @current_segment, bank = @current_bank) def write_memory(bytes, pc = @program_counter, segment = @current_segment, bank = @current_bank)
memory_space = get_virtual_memory_space(segment, bank) memory_space = get_virtual_memory_space(segment, bank)
memory_space.write(pc, bytes) memory_space.write(pc, bytes)