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Implement date attribute reading 

This is very inefficient implementation.

This calls strftime with correct modifier and then atoi() to
turn the result into integer
This commit is contained in:
Bananymous 2024-04-28 02:22:32 +03:00
parent 1c1d721f7c
commit 5c5942629d
1 changed files with 30 additions and 1 deletions
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31
04_semantics_and_running/main.py
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@ -305,7 +305,7 @@ class CompileData:
subq $16, %rsp
movq %rdi, 0(%rsp)
leaq 0(%rsp), %rdi
call gmtime
call localtime
movq $date_buffer, %rdi
movq $(date_buffer_end - date_buffer), %rsi
movq $date_format, %rdx
@ -318,6 +318,25 @@ class CompileData:
ret
'''
self.callables['__builtin_get_day_attr'] = '''\
pushq %rbp
movq %rsp, %rbp
subq $16, %rsp
movq %rdi, 0(%rsp)
movq %rsi, 8(%rsp)
leaq 0(%rsp), %rdi
call localtime
movq $date_buffer, %rdi
movq $(date_buffer_end - date_buffer), %rsi
movq 8(%rsp), %rdx
movq %rax, %rcx
call strftime
movq $date_buffer, %rdi
call atoi
leave
ret
'''
def get_label(self) -> str:
self.label_counter += 1
return f'.L{self.label_counter - 1}'
@ -353,6 +372,11 @@ class CompileData:
prefix += 'int_format: .asciz "%lld"\n'
prefix += 'str_format: .asciz "%s"\n'
prefix += 'date_format: .asciz "%Y-%m-%d"\n'
prefix += 'day_format: .asciz "%d"\n'
prefix += 'month_format: .asciz "%m"\n'
prefix += 'year_format: .asciz "%Y"\n'
prefix += 'weekday_format: .asciz "%u"\n'
prefix += 'weeknum_format: .asciz "%W"\n'
for index, string in enumerate(self.string_literals):
prefix += f'S{index}: .asciz "{string}"\n'
prefix += '\n'
@ -546,6 +570,11 @@ def compile_ast(node: ASTnode, compile_data: CompileData) -> None:
compile_data.code += f' movq ${label}, %rax\n'
case 'date_literal':
compile_data.code += f' movq ${timegm(node.value.timetuple())}, %rax\n'
case 'attribute_read':
compile_ast(node.child_identifier, compile_data)
compile_data.code += f' movq %rax, %rdi\n'
compile_data.code += f' movq ${node.child_attribute.value}_format, %rsi\n'
compile_data.code += f' call __builtin_get_day_attr\n'
case 'do_until':
label_loop = compile_data.get_label()
compile_data.insert_label(label_loop)