| #!/usr/bin/env python3
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| """Translate the MQL5 sources of this project into C++ so that the exact same
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| code can be compiled and tested without MetaTrader.
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|
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| Only the constrained MQL5 subset used in this repository is supported:
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| * dynamic arrays T name[]; -> MqlArray<T> name;
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| * fixed arrays T name[N]; -> MqlFixed<T, (N)> name;
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| * array parameters [const] T &name[] -> [const] MqlArray<T> &name
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| * #property lines are dropped.
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| * #include "path/File.mqh" is mapped to the translated header "File.h". The
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| path must be quoted and relative to the including file, which is how
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| MetaEditor resolves it; <...> searches MQL5/Include only, and the project
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| is not there when it is cloned into MQL5/Shared Projects. A path that does
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| not point to an existing file is an error.
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| * datetime literals D'YYYY.MM.DD [HH:MM[:SS]]' become integer seconds (UTC).
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| Everything else must already be valid C++ (see tests/mql5_shim.h).
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|
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| usage: mql2cpp.py input.mqh output.h
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| """
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| import calendar
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| import os
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| import re
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| import sys
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|
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| KEYWORDS = {'return', 'delete', 'new', 'else', 'case', 'goto', 'throw', 'typedef', 'using'}
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|
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| RE_PARAM = re.compile(r'(\bconst\s+)?\b([A-Za-z_]\w*)\s*&\s*([A-Za-z_]\w*)\s*\[\s*\]')
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| RE_DYN = re.compile(r'^(\s*)(static\s+)?([A-Za-z_]\w*)\s+([A-Za-z_]\w*)\s*\[\s*\]\s*;')
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| RE_FIX = re.compile(r'^(\s*)(static\s+)?([A-Za-z_]\w*)\s+([A-Za-z_]\w*)\s*\[\s*([^\]]+?)\s*\]\s*;')
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| RE_INCLUDE = re.compile(r'^\s*#include\s*(<[^>]*>|"[^"]*")')
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| RE_DATE = re.compile(r"D'(\d{4})\.(\d{2})\.(\d{2})(?:\s+(\d{2}):(\d{2})(?::(\d{2}))?)?'")
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|
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| def date_literal(m):
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| y, mo, d = int(m.group(1)), int(m.group(2)), int(m.group(3))
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| hh = int(m.group(4) or 0)
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| mm = int(m.group(5) or 0)
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| ss = int(m.group(6) or 0)
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| return '((datetime)%dL)' % calendar.timegm((y, mo, d, hh, mm, ss, 0, 0, 0))
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|
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|
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| def include(spec, src_path):
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| """Return the C++ #include for the MQL5 include spec ("..." or <...>)."""
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| if not spec.startswith('"'):
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| sys.exit('%s: #include %s: use a quoted path relative to this file' % (src_path, spec))
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| path = spec[1:-1].replace('\\', '/')
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| if not os.path.isfile(os.path.join(os.path.dirname(src_path), path)):
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| sys.exit('%s: #include %s: no such file relative to this file' % (src_path, spec))
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| return '#include "%s.h"' % os.path.splitext(os.path.basename(path))[0]
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|
|
|
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| def translate(src, src_path):
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| out = []
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| for line in src.splitlines():
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| if line.lstrip().startswith('#property'):
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| out.append('// ' + line)
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| continue
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| m = RE_INCLUDE.match(line)
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| if m:
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| out.append(include(m.group(1), src_path))
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| continue
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| line = RE_DATE.sub(date_literal, line)
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| line = RE_PARAM.sub(lambda mm: '%sMqlArray<%s> &%s' % (mm.group(1) or '', mm.group(2), mm.group(3)), line)
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| m = RE_DYN.match(line)
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| if m and m.group(3) not in KEYWORDS:
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| line = '%s%sMqlArray<%s> %s;%s' % (m.group(1), m.group(2) or '', m.group(3), m.group(4), line[m.end():])
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| else:
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| m = RE_FIX.match(line)
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| if m and m.group(3) not in KEYWORDS:
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| line = '%s%sMqlFixed<%s, (%s)> %s;%s' % (m.group(1), m.group(2) or '', m.group(3), m.group(5),
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| m.group(4), line[m.end():])
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| out.append(line)
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| return '\n'.join(out) + '\n'
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|
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|
|
| def main():
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| src = open(sys.argv[1], encoding='utf-8').read()
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| res = '// Generated by tests/mql2cpp.py from %s - do not edit.\n' % sys.argv[1].split('/')[-1]
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| res += translate(src, sys.argv[1])
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| open(sys.argv[2], 'w', encoding='utf-8').write(res)
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|
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|
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| if __name__ == '__main__':
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| main()
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