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Swift binding (#1707)
* update const generator for swift * groups constants by enum * use pascal case for enum names * use camel case for enum values * values are always literals * add extra options for some enums * use different types for some enums * generate option sets instead of enums for some types * renaming constants according to regex pattern * don't output documentation comments for non-exported defines * add Swift binding to readme
This commit is contained in:
Jesús A. Álvarez
GitHub
parent
6a8406aff6
commit
4dd716c37e
@ -70,3 +70,7 @@ More bindings created & maintained by the community are available as followings.
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- capstone-d: D binding (by Dimitri Bohlender)
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https://github.com/bohlender/capstone-d
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- Swift binding (by Jesús A. Álvarez)
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https://github.com/zydeco/capstone-swift
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@ -77,11 +77,118 @@ template = {
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'comment_open': '(*',
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'comment_close': ' *)',
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},
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'swift': {
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'header': "// For Capstone Engine. AUTO-GENERATED FILE, DO NOT EDIT (%s)\n\n",
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'footer': "",
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'enum_doc': '/// %s\n',
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'enum_header': 'public enum %s: %s {\n',
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'enum_default_type': 'UInt32',
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'enum_types': {
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'UInt16': r'^\w+Reg$',
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'UInt8': r'^\w+Grp$'
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},
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'option_set_header': 'public struct %s: OptionSet {\n public typealias RawValue = %s\n public let rawValue: RawValue\n public init(rawValue: RawValue) { self.rawValue = rawValue }\n',
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'option_sets': {
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'X86Eflags': 'UInt64',
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'X86FpuFlags': 'UInt64',
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'SparcHint': 'UInt32',
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'M680xIdx': 'UInt8',
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'M680xOpFlags': 'UInt8',
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},
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'rename': {
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r'^M680X_(\w+_OP_IN_MNEM)$': r'M680X_OP_FLAGS_\1',
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},
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'option_format': ' public static let {option} = {type}(rawValue: {value})\n',
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'enum_extra_options': {
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# swift enum != OptionSet, so options must be specified
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'ArmSysreg': {
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'spsrCx': 'spsrC + spsrX',
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'spsrCs': 'spsrC + spsrS',
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'spsrXs': 'spsrX + spsrS',
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'spsrCxs': 'spsrC + spsrX + spsrS',
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'spsrCf': 'spsrC + spsrF',
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'spsrXf': 'spsrX + spsrF',
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'spsrCxf': 'spsrC + spsrX + spsrF',
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'spsrSf': 'spsrS + spsrF',
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'spsrCsf': 'spsrC + spsrS + spsrF',
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'spsrXsf': 'spsrX + spsrS + spsrF',
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'spsrCxsf': 'spsrC + spsrX + spsrS + spsrF',
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'cpsrCx': 'cpsrC + cpsrX',
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'cpsrCs': 'cpsrC + cpsrS',
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'cpsrXs': 'cpsrX + cpsrS',
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'cpsrCxs': 'cpsrC + cpsrX + cpsrS',
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'cpsrCf': 'cpsrC + cpsrF',
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'cpsrXf': 'cpsrX + cpsrF',
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'cpsrCxf': 'cpsrC + cpsrX + cpsrF',
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'cpsrSf': 'cpsrS + cpsrF',
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'cpsrCsf': 'cpsrC + cpsrS + cpsrF',
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'cpsrXsf': 'cpsrX + cpsrS + cpsrF',
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'cpsrCxsf': 'cpsrC + cpsrX + cpsrS + cpsrF',
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}
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},
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'enum_footer': '}\n\n',
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'doc_line_format': ' /// %s\n',
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'line_format': ' case %s = %s\n',
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'dup_line_format': ' public static let %s = %s\n',
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'out_file': './swift/Sources/Capstone/%sEnums.swift',
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'reserved_words': [
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'break', 'class', 'for', 'false', 'in', 'init', 'return', 'true'
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],
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'reserved_word_format': '`%s`',
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# prefixes for constant filenames of all archs - case sensitive
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'arm.h': 'Arm',
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'arm64.h': 'Arm64',
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'm68k.h': 'M68k',
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'mips.h': 'Mips',
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'x86.h': 'X86',
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'ppc.h': 'Ppc',
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'sparc.h': 'Sparc',
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'systemz.h': 'Sysz',
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'xcore.h': 'Xcore',
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'tms320c64x.h': 'TMS320C64x',
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'm680x.h': 'M680x',
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'evm.h': 'Evm',
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'mos65xx.h': 'Mos65xx',
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'comment_open': '\t//',
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'comment_close': '',
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},
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}
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# markup for comments to be added to autogen files
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MARKUP = '//>'
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def camelize(name):
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parts = name.split('_')
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return parts[0].lower() + ''.join(map(str.capitalize, parts[1:]))
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def pascalize(name):
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parts = name.split('_')
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return ''.join(map(str.capitalize, parts))
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def pascalize_const(name):
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parts = name.split('_',2)
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match = re.match('^(CC|DISP|MOD|DIR|BCAST|RM|FLAGS|SIZE|BR_DISP_SIZE)_', parts[2])
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if match:
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parts = name.split('_', 2 + match.group(0).count('_'))
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item = camelize(parts[-1])
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if item[0].isdigit():
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item = parts[-2].lower() + item
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return (pascalize('_'.join(parts[0:-1])), item)
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def enum_type(name, templ):
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for enum_type, pattern in templ['enum_types'].items():
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if re.match(pattern, name):
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return enum_type
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return templ['enum_default_type']
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def write_enum_extra_options(outfile, templ, enum, enum_values):
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if 'enum_extra_options' in templ and enum in templ['enum_extra_options']:
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for name, value in templ['enum_extra_options'][enum].items():
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if type(value) is str:
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# evaluate within existing enum
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value = eval(value, None, enum_values)
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outfile.write((templ['line_format'] %(name, value)).encode("utf-8"))
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def gen(lang):
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global include, INCL_DIR
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print('Generating bindings for', lang)
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@ -96,6 +203,9 @@ def gen(lang):
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outfile.write((templ['header'] % (prefix)).encode("utf-8"))
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lines = open(INCL_DIR + target).readlines()
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enums = {}
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values = {}
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doc_lines = []
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count = 0
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for line in lines:
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@ -107,6 +217,13 @@ def gen(lang):
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templ['comment_close']) ).encode("utf-8"))
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continue
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if line.startswith('/// ') and 'enum_doc' in templ:
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doc_lines.append(line[4: ])
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continue
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elif line.startswith('}') or line.startswith('#'):
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doc_lines = []
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pass
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if line == '' or line.startswith('//'):
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continue
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@ -155,8 +272,72 @@ def gen(lang):
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if rhs[0].isalpha():
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rhs = '_' + rhs
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outfile.write((templ['line_format'] %(f[0].strip(), rhs)).encode("utf-8"))
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if lang == 'swift':
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value = eval(rhs, None, values)
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exec('%s = %d' %(f[0].strip(), value), None, values)
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else:
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value = rhs
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name = f[0].strip()
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if 'rename' in templ:
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# constant renaming
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for pattern, replacement in templ['rename'].items():
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if re.match(pattern, name):
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name = re.sub(pattern, replacement, name)
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break
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if 'enum_header' in templ:
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# separate constants by enums based on name
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enum, name = pascalize_const(name)
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if enum not in enums:
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if len(enums) > 0:
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write_enum_extra_options(outfile, templ, last_enum, enums[last_enum])
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outfile.write((templ['enum_footer']).encode("utf-8"))
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last_enum = enum
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if 'enum_doc' in templ:
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for doc_line in doc_lines:
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outfile.write((templ['enum_doc'] %(doc_line)).encode("utf-8"))
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doc_lines = []
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if 'option_sets' in templ and enum in templ['option_sets']:
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outfile.write((templ['option_set_header'] %(enum, templ['option_sets'][enum])).encode("utf-8"))
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else:
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outfile.write((templ['enum_header'] %(enum, enum_type(enum, templ))).encode("utf-8"))
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enums[enum] = {}
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if 'option_sets' in templ and enum in templ['option_sets']:
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# option set format
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line_format = templ['option_format'].format(option='%s',type=enum,value='%s')
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if value == 0:
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continue # skip empty option
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# option set values need not be literals
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value = rhs
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elif 'dup_line_format' in templ and value in enums[enum].values():
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# different format for duplicate values?
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line_format = templ['dup_line_format']
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else:
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line_format = templ['line_format']
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enums[enum][name] = value
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# escape reserved words
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if 'reserved_words' in templ and name in templ['reserved_words']:
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name = templ['reserved_word_format'] %(name)
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# print documentation?
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if 'doc_line_format' in templ and '///<' in line:
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doc = line.split('///<')[1].strip()
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outfile.write((templ['doc_line_format'] %(doc)).encode("utf-8"))
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else:
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line_format = templ['line_format']
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outfile.write((line_format %(name, value)).encode("utf-8"))
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if 'enum_footer' in templ:
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write_enum_extra_options(outfile, templ, enum, enums[enum])
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outfile.write((templ['enum_footer']).encode("utf-8"))
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outfile.write((templ['footer']).encode("utf-8"))
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outfile.close()
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