wram.py: bss and constant parsing

original-commit-id: aecce03834844f6c876d903a781443d65dbc11cb

1 files changed, 60 insertions, 0 deletions

diff --git a/wram.py b/wram.py
new file mode 100644
index 0000000..00b80c4
--- /dev/null
+++ b/wram.py
@@ -0,0 +1,60 @@
+# coding: utf-8
+
+# RGBDS BSS section and constant parsing.
+
+def read_bss_sections(bss):
+	sections = []
+	section = {}
+	address = None
+	if type(bss) is not list: bss = bss.split('\n')
+	for line in bss:
+		if 'SECTION' in line:
+			if section: sections.append(section) # last section
+			
+			address = int(line.split('[')[1].split(']')[0].replace('$',''), 16)
+			section = {
+				'name': line.split('"')[1],
+				#'type': line.split(',')[1].split('[')[0].strip(),
+				'start': address,
+				'labels': [],
+			}
+		elif ':' in line:
+			# the only labels that don't use :s so far are enders,
+			# which we typically don't want to end up in the output
+			label = line.lstrip().split(':')[0]
+			if ';' not in label:
+				section['labels'] += [{'label': label, 'address': address, 'length': 0}]
+		elif line.lstrip()[:3] == 'ds ':
+			length = eval(line.lstrip()[3:].split(';')[0].replace('$','0x'))
+			address += length
+			if section['labels']:
+				section['labels'][-1]['length'] += length
+	sections.append(section)
+	return sections
+
+wram_sections = read_bss_sections(open('../wram.asm', 'r').readlines())
+
+
+def make_wram_labels():
+	wram_labels = {}
+	for section in wram_sections:
+		for label in section['labels']:
+			if label['address'] not in wram_labels.keys():
+				wram_labels[label['address']] = []
+			wram_labels[label['address']] += [label['label']]
+	return wram_labels
+
+wram_labels = make_wram_labels()
+
+
+def constants_to_dict(constants):
+	return dict((eval(constant.split(';')[0].split('EQU')[1].replace('$','0x')), constant.split('EQU')[0].strip()) for constant in constants)
+
+def scrape_constants(text):
+	if type(text) is not list:
+		text = text.split('\n')
+	return constants_to_dict([line for line in text if 'EQU' in line and ';' not in line.split('EQU')[0]])
+
+hram_constants = scrape_constants(open('../hram.asm','r').readlines())
+gbhw_constants = scrape_constants(open('../gbhw.asm','r').readlines())
+