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319 lines
6.5 KiB
319 lines
6.5 KiB
# Copyright (c) 2006-2019 Andrey Golovigin
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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"""Built-in functions for BibTeX interpreter.
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CAUTION: functions should PUSH results, not RETURN
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"""
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from __future__ import print_function, unicode_literals
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from functools import update_wrapper
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import six
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import pybtex.io
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from pybtex.bibtex import utils
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from pybtex.bibtex.exceptions import BibTeXError
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from pybtex.bibtex.names import format_name as format_bibtex_name
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from pybtex.errors import report_error
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from pybtex.utils import memoize
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def print_warning(msg):
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report_error(BibTeXError(msg))
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class Builtin(object):
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def __init__(self, f):
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self.f = f
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def execute(self, interpreter):
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self.f(interpreter)
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def __repr__(self):
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return '<builtin %s>' % self.f.__name__
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builtins = {}
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def builtin(name):
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def _builtin(f):
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b = Builtin(f)
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update_wrapper(b, f)
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builtins[name] = b
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return b
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return _builtin
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@builtin('>')
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def operator_more(i):
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arg1 = i.pop()
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arg2 = i.pop()
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if arg2 > arg1:
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i.push(1)
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else:
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i.push(0)
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@builtin('<')
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def operator_less(i):
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arg1 = i.pop()
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arg2 = i.pop()
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if arg2 < arg1:
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i.push(1)
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else:
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i.push(0)
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@builtin('=')
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def operator_equals(i):
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arg1 = i.pop()
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arg2 = i.pop()
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if arg2 == arg1:
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i.push(1)
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else:
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i.push(0)
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@builtin('*')
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def operator_asterisk(i):
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arg1 = i.pop()
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arg2 = i.pop()
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i.push(arg2 + arg1)
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@builtin(':=')
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def operator_assign(i):
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var = i.pop()
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value = i.pop()
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var.set(value)
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@builtin('+')
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def operator_plus(i):
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arg1 = i.pop()
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arg2 = i.pop()
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i.push(arg2 + arg1)
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@builtin('-')
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def operator_minus(i):
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arg1 = i.pop()
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arg2 = i.pop()
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i.push(arg2 - arg1)
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@builtin('add.period$')
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def add_period(i):
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s = i.pop()
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if s and not s.rstrip('}')[-1] in '.?!':
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s += '.'
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i.push(s)
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@builtin('call.type$')
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def call_type(i):
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entry_type = i.current_entry.type
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try:
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func = i.vars[entry_type]
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except KeyError:
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print_warning(u'entry type for "{0}" isn\'t style-file defined'.format(
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i.current_entry_key,
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))
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try:
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func = i.vars['default.type']
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except KeyError:
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return
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func.execute(i)
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@builtin('change.case$')
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def change_case(i):
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mode = i.pop()
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string = i.pop()
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if not mode:
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raise BibTeXError('empty mode string passed to change.case$')
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mode_letter = mode[0].lower()
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if not mode_letter in ('l', 'u', 't'):
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raise BibTeXError('incorrect change.case$ mode: %s' % mode)
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i.push(utils.change_case(string, mode_letter))
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@builtin('chr.to.int$')
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def chr_to_int(i):
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s = i.pop()
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try:
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value = ord(s)
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except TypeError:
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raise BibTeXError('%s passed to chr.to.int$', s)
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i.push(value)
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@builtin('cite$')
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def cite(i):
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i.push(i.current_entry_key)
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@builtin('duplicate$')
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def duplicate(i):
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tmp = i.pop()
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i.push(tmp)
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i.push(tmp)
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@builtin('empty$')
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def empty(i):
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#FIXME error checking
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s = i.pop()
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if s and not s.isspace():
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i.push(0)
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else:
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i.push(1)
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@memoize
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def _split_names(names):
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return utils.split_name_list(names)
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@memoize
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def _format_name(names, n, format):
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name = _split_names(names)[n - 1]
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return format_bibtex_name(name, format)
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@builtin('format.name$')
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def format_name(i):
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format = i.pop()
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n = i.pop()
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names = i.pop()
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i.push(_format_name(names, n, format))
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@builtin('if$')
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def if_(i):
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f1 = i.pop()
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f2 = i.pop()
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p = i.pop()
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if p > 0:
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f2.execute(i)
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else:
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f1.execute(i)
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@builtin('int.to.chr$')
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def int_to_chr(i):
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n = i.pop()
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try:
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char = six.unichr(n)
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except ValueError:
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raise BibTeXError('%i passed to int.to.chr$', n)
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i.push(char)
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@builtin('int.to.str$')
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def int_to_str(i):
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i.push(str(i.pop()))
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@builtin('missing$')
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def missing(i):
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f = i.pop()
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if i.is_missing_field(f):
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i.push(1)
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else:
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i.push(0)
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@builtin('newline$')
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def newline(i):
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i.newline()
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@builtin('num.names$')
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def num_names(i):
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names = i.pop()
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i.push(len(utils.split_name_list(names)))
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@builtin('pop$')
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def pop(i):
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i.pop()
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@builtin('preamble$')
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def preamble(i):
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i.push(i.bib_data.preamble)
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@builtin('purify$')
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def purify(i):
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s = i.pop()
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i.push(utils.bibtex_purify(s))
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@builtin('quote$')
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def quote(i):
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i.push('"')
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@builtin('skip$')
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def skip(i):
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pass
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@builtin('substring$')
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def substring(i):
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length = i.pop()
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start = i.pop()
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string = i.pop()
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i.push(utils.bibtex_substring(string, start, length))
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@builtin('stack$')
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def stack(i):
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while i.stack:
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print(i.pop(), file=pybtex.io.stdout)
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@builtin('swap$')
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def swap(i):
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tmp1 = i.pop()
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tmp2 = i.pop()
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i.push(tmp1)
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i.push(tmp2)
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@builtin('text.length$')
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def text_length(i):
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s = i.pop()
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i.push(utils.bibtex_len(s))
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@builtin('text.prefix$')
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def text_prefix(i):
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l = i.pop()
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s = i.pop()
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i.push(utils.bibtex_prefix(s, l))
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@builtin('top$')
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def top(i):
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print(i.pop(), file=pybtex.io.stdout)
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@builtin('type$')
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def type_(i):
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i.push(i.current_entry.type)
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@builtin('warning$')
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def warning(i):
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msg = i.pop()
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print_warning(msg)
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@builtin('while$')
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def while_(i):
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f = i.pop()
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p = i.pop()
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while True:
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p.execute(i)
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if i.pop() <= 0:
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break
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f.execute(i)
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@builtin('width$')
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def width(i):
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s = i.pop()
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i.push(utils.bibtex_width(s))
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@builtin('write$')
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def write(i):
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s = i.pop()
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i.output(s)
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