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#!/usr/bin/env python3
"""

Auxiliary functions for f2py2e.

Copyright 1999,2000 Pearu Peterson all rights reserved,
Pearu Peterson <pearu@ioc.ee>
Permission to use, modify, and distribute this software is given under the
terms of the NumPy (BSD style) LICENSE.

NO WARRANTY IS EXPRESSED OR IMPLIED.  USE AT YOUR OWN RISK.
$Date: 2005/07/24 19:01:55 $
Pearu Peterson

"""
import pprint
import sys
import types
from functools import reduce

from . import __version__
from . import cfuncs

__all__ = [
    'applyrules', 'debugcapi', 'dictappend', 'errmess', 'gentitle',
    'getargs2', 'getcallprotoargument', 'getcallstatement',
    'getfortranname', 'getpymethoddef', 'getrestdoc', 'getusercode',
    'getusercode1', 'hasbody', 'hascallstatement', 'hascommon',
    'hasexternals', 'hasinitvalue', 'hasnote', 'hasresultnote',
    'isallocatable', 'isarray', 'isarrayofstrings',
    'ischaracter', 'ischaracterarray', 'ischaracter_or_characterarray',
    'iscomplex',
    'iscomplexarray', 'iscomplexfunction', 'iscomplexfunction_warn',
    'isdouble', 'isdummyroutine', 'isexternal', 'isfunction',
    'isfunction_wrap', 'isint1', 'isint1array', 'isinteger', 'isintent_aux',
    'isintent_c', 'isintent_callback', 'isintent_copy', 'isintent_dict',
    'isintent_hide', 'isintent_in', 'isintent_inout', 'isintent_inplace',
    'isintent_nothide', 'isintent_out', 'isintent_overwrite', 'islogical',
    'islogicalfunction', 'islong_complex', 'islong_double',
    'islong_doublefunction', 'islong_long', 'islong_longfunction',
    'ismodule', 'ismoduleroutine', 'isoptional', 'isprivate', 'isrequired',
    'isroutine', 'isscalar', 'issigned_long_longarray', 'isstring',
    'isstringarray', 'isstring_or_stringarray', 'isstringfunction',
    'issubroutine',
    'issubroutine_wrap', 'isthreadsafe', 'isunsigned', 'isunsigned_char',
    'isunsigned_chararray', 'isunsigned_long_long',
    'isunsigned_long_longarray', 'isunsigned_short',
    'isunsigned_shortarray', 'l_and', 'l_not', 'l_or', 'outmess',
    'replace', 'show', 'stripcomma', 'throw_error', 'isattr_value'
]

f2py_version = __version__.version

errmess = sys.stderr.write
show = pprint.pprint

options = {}
debugoptions = []
wrapfuncs = 1

def outmess(t):
    if options.get('verbose', 1):
        sys.stdout.write(t)

def debugcapi(var):
    return 'capi' in debugoptions

def _ischaracter(var):
    return 'typespec' in var and var['typespec'] == 'character' and \
           not isexternal(var)

def _isstring(var):
    return 'typespec' in var and var['typespec'] == 'character' and \
           not isexternal(var)

def ischaracter_or_characterarray(var):
    return _ischaracter(var) and 'charselector' not in var

def ischaracter(var):
    return ischaracter_or_characterarray(var) and not isarray(var)

def ischaracterarray(var):
    return ischaracter_or_characterarray(var) and isarray(var)

def isstring_or_stringarray(var):
    return _ischaracter(var) and 'charselector' in var

def isstring(var):
    return isstring_or_stringarray(var) and not isarray(var)

def isstringarray(var):
    return isstring_or_stringarray(var) and isarray(var)

def isarrayofstrings(var):  # obsolete?
    # leaving out '*' for now so that `character*(*) a(m)` and `character
    # a(m,*)` are treated differently. Luckily `character**` is illegal.
    return isstringarray(var) and var['dimension'][-1] == '(*)'

def isarray(var):
    return 'dimension' in var and not isexternal(var)

def isscalar(var):
    return not (isarray(var) or isstring(var) or isexternal(var))

def iscomplex(var):
    return isscalar(var) and \
           var.get('typespec') in ['complex', 'double complex']

def islogical(var):
    return isscalar(var) and var.get('typespec') == 'logical'

def isinteger(var):
    return isscalar(var) and var.get('typespec') == 'integer'

def isreal(var):
    return isscalar(var) and var.get('typespec') == 'real'

def get_kind(var):
    try:
        return var['kindselector']['*']
    except KeyError:
        try:
            return var['kindselector']['kind']
        except KeyError:
            pass

def isint1(var):
    return var.get('typespec') == 'integer' \
        and get_kind(var) == '1' and not isarray(var)

def islong_long(var):
    if not isscalar(var):
        return 0
    if var.get('typespec') not in ['integer', 'logical']:
        return 0
    return get_kind(var) == '8'

def isunsigned_char(var):
    if not isscalar(var):
        return 0
    if var.get('typespec') != 'integer':
        return 0
    return get_kind(var) == '-1'

def isunsigned_short(var):
    if not isscalar(var):
        return 0
    if var.get('typespec') != 'integer':
        return 0
    return get_kind(var) == '-2'

def isunsigned(var):
    if not isscalar(var):
        return 0
    if var.get('typespec') != 'integer':
        return 0
    return get_kind(var) == '-4'

def isunsigned_long_long(var):
    if not isscalar(var):
        return 0
    if var.get('typespec') != 'integer':
        return 0
    return get_kind(var) == '-8'

def isdouble(var):
    if not isscalar(var):
        return 0
    if not var.get('typespec') == 'real':
        return 0
    return get_kind(var) == '8'

def islong_double(var):
    if not isscalar(var):
        return 0
    if not var.get('typespec') == 'real':
        return 0
    return get_kind(var) == '16'

def islong_complex(var):
    if not iscomplex(var):
        return 0
    return get_kind(var) == '32'

def iscomplexarray(var):
    return isarray(var) and \
           var.get('typespec') in ['complex', 'double complex']

def isint1array(var):
    return isarray(var) and var.get('typespec') == 'integer' \
        and get_kind(var) == '1'

def isunsigned_chararray(var):
    return isarray(var) and var.get('typespec') in ['integer', 'logical']\
        and get_kind(var) == '-1'

def isunsigned_shortarray(var):
    return isarray(var) and var.get('typespec') in ['integer', 'logical']\
        and get_kind(var) == '-2'

def isunsignedarray(var):
    return isarray(var) and var.get('typespec') in ['integer', 'logical']\
        and get_kind(var) == '-4'

def isunsigned_long_longarray(var):
    return isarray(var) and var.get('typespec') in ['integer', 'logical']\
        and get_kind(var) == '-8'

def issigned_chararray(var):
    return isarray(var) and var.get('typespec') in ['integer', 'logical']\
        and get_kind(var) == '1'

def issigned_shortarray(var):
    return isarray(var) and var.get('typespec') in ['integer', 'logical']\
        and get_kind(var) == '2'

def issigned_array(var):
    return isarray(var) and var.get('typespec') in ['integer', 'logical']\
        and get_kind(var) == '4'

def issigned_long_longarray(var):
    return isarray(var) and var.get('typespec') in ['integer', 'logical']\
        and get_kind(var) == '8'

def isallocatable(var):
    return 'attrspec' in var and 'allocatable' in var['attrspec']

def ismutable(var):
    return not ('dimension' not in var or isstring(var))

def ismoduleroutine(rout):
    return 'modulename' in rout

def ismodule(rout):
    return 'block' in rout and 'module' == rout['block']

def isfunction(rout):
    return 'block' in rout and 'function' == rout['block']

def isfunction_wrap(rout):
    if isintent_c(rout):
        return 0
    return wrapfuncs and isfunction(rout) and (not isexternal(rout))

def issubroutine(rout):
    return 'block' in rout and 'subroutine' == rout['block']

def issubroutine_wrap(rout):
    if isintent_c(rout):
        return 0
    return issubroutine(rout) and hasassumedshape(rout)

def isattr_value(var):
    return 'value' in var.get('attrspec', [])

def hasassumedshape(rout):
    if rout.get('hasassumedshape'):
        return True
    for a in rout['args']:
        for d in rout['vars'].get(a, {}).get('dimension', []):
            if d == ':':
                rout['hasassumedshape'] = True
                return True
    return False

def requiresf90wrapper(rout):
    return ismoduleroutine(rout) or hasassumedshape(rout)

def isroutine(rout):
    return isfunction(rout) or issubroutine(rout)

def islogicalfunction(rout):
    if not isfunction(rout):
        return 0
    if 'result' in rout:
        a = rout['result']
    else:
        a = rout['name']
    if a in rout['vars']:
        return islogical(rout['vars'][a])
    return 0

def islong_longfunction(rout):
    if not isfunction(rout):
        return 0
    if 'result' in rout:
        a = rout['result']
    else:
        a = rout['name']
    if a in rout['vars']:
        return islong_long(rout['vars'][a])
    return 0

def islong_doublefunction(rout):
    if not isfunction(rout):
        return 0
    if 'result' in rout:
        a = rout['result']
    else:
        a = rout['name']
    if a in rout['vars']:
        return islong_double(rout['vars'][a])
    return 0

def iscomplexfunction(rout):
    if not isfunction(rout):
        return 0
    if 'result' in rout:
        a = rout['result']
    else:
        a = rout['name']
    if a in rout['vars']:
        return iscomplex(rout['vars'][a])
    return 0

def iscomplexfunction_warn(rout):
    if iscomplexfunction(rout):
        outmess("""\
    **************************************************************
        Warning: code with a function returning complex value
        may not work correctly with your Fortran compiler.
        When using GNU gcc/g77 compilers, codes should work
        correctly for callbacks with:
        f2py -c -DF2PY_CB_RETURNCOMPLEX
    **************************************************************\n""")
        return 1
    return 0

def isstringfunction(rout):
    if not isfunction(rout):
        return 0
    if 'result' in rout:
        a = rout['result']
    else:
        a = rout['name']
    if a in rout['vars']:
        return isstring(rout['vars'][a])
    return 0

def hasexternals(rout):
    return 'externals' in rout and rout['externals']

def isthreadsafe(rout):
    return 'f2pyenhancements' in rout and \
           'threadsafe' in rout['f2pyenhancements']

def hasvariables(rout):
    return 'vars' in rout and rout['vars']

def isoptional(var):
    return ('attrspec' in var and 'optional' in var['attrspec'] and
            'required' not in var['attrspec']) and isintent_nothide(var)

def isexternal(var):
    return 'attrspec' in var and 'external' in var['attrspec']

def isrequired(var):
    return not isoptional(var) and isintent_nothide(var)

def isintent_in(var):
    if 'intent' not in var:
        return 1
    if 'hide' in var['intent']:
        return 0
    if 'inplace' in var['intent']:
        return 0
    if 'in' in var['intent']:
        return 1
    if 'out' in var['intent']:
        return 0
    if 'inout' in var['intent']:
        return 0
    if 'outin' in var['intent']:
        return 0
    return 1

def isintent_inout(var):
    return ('intent' in var and ('inout' in var['intent'] or
            'outin' in var['intent']) and 'in' not in var['intent'] and
            'hide' not in var['intent'] and 'inplace' not in var['intent'])

def isintent_out(var):
    return 'out' in var.get('intent', [])

def isintent_hide(var):
    return ('intent' in var and ('hide' in var['intent'] or
            ('out' in var['intent'] and 'in' not in var['intent'] and
                (not l_or(isintent_inout, isintent_inplace)(var)))))

def isintent_nothide(var):
    return not isintent_hide(var)

def isintent_c(var):
    return 'c' in var.get('intent', [])

def isintent_cache(var):
    return 'cache' in var.get('intent', [])

def isintent_copy(var):
    return 'copy' in var.get('intent', [])

def isintent_overwrite(var):
    return 'overwrite' in var.get('intent', [])

def isintent_callback(var):
    return 'callback' in var.get('intent', [])

def isintent_inplace(var):
    return 'inplace' in var.get('intent', [])

def isintent_aux(var):
    return 'aux' in var.get('intent', [])

def isintent_aligned4(var):
    return 'aligned4' in var.get('intent', [])

def isintent_aligned8(var):
    return 'aligned8' in var.get('intent', [])

def isintent_aligned16(var):
    return 'aligned16' in var.get('intent', [])

isintent_dict = {isintent_in: 'INTENT_IN', isintent_inout: 'INTENT_INOUT',
                 isintent_out: 'INTENT_OUT', isintent_hide: 'INTENT_HIDE',
                 isintent_cache: 'INTENT_CACHE',
                 isintent_c: 'INTENT_C', isoptional: 'OPTIONAL',
                 isintent_inplace: 'INTENT_INPLACE',
                 isintent_aligned4: 'INTENT_ALIGNED4',
                 isintent_aligned8: 'INTENT_ALIGNED8',
                 isintent_aligned16: 'INTENT_ALIGNED16',
                 }

def isprivate(var):
    return 'attrspec' in var and 'private' in var['attrspec']

def hasinitvalue(var):
    return '=' in var

def hasinitvalueasstring(var):
    if not hasinitvalue(var):
        return 0
    return var['='][0] in ['"', "'"]

def hasnote(var):
    return 'note' in var

def hasresultnote(rout):
    if not isfunction(rout):
        return 0
    if 'result' in rout:
        a = rout['result']
    else:
        a = rout['name']
    if a in rout['vars']:
        return hasnote(rout['vars'][a])
    return 0

def hascommon(rout):
    return 'common' in rout

def containscommon(rout):
    if hascommon(rout):
        return 1
    if hasbody(rout):
        for b in rout['body']:
            if containscommon(b):
                return 1
    return 0

def containsmodule(block):
    if ismodule(block):
        return 1
    if not hasbody(block):
        return 0
    for b in block['body']:
        if containsmodule(b):
            return 1
    return 0

def hasbody(rout):
    return 'body' in rout

def hascallstatement(rout):
    return getcallstatement(rout) is not None

def istrue(var):
    return 1

def isfalse(var):
    return 0

class F2PYError(Exception):
    pass

class throw_error:

def __init__(self, mess):
        self.mess = mess

def __call__(self, var):
        mess = '\n\n  var = %s\n  Message: %s\n' % (var, self.mess)
        raise F2PYError(mess)

def l_and(*f):
    l1, l2 = 'lambda v', []
    for i in range(len(f)):
        l1 = '%s,f%d=f[%d]' % (l1, i, i)
        l2.append('f%d(v)' % (i))
    return eval('%s:%s' % (l1, ' and '.join(l2)))

def l_or(*f):
    l1, l2 = 'lambda v', []
    for i in range(len(f)):
        l1 = '%s,f%d=f[%d]' % (l1, i, i)
        l2.append('f%d(v)' % (i))
    return eval('%s:%s' % (l1, ' or '.join(l2)))

def l_not(f):
    return eval('lambda v,f=f:not f(v)')

def isdummyroutine(rout):
    try:
        return rout['f2pyenhancements']['fortranname'] == ''
    except KeyError:
        return 0

def getfortranname(rout):
    try:
        name = rout['f2pyenhancements']['fortranname']
        if name == '':
            raise KeyError
        if not name:
            errmess('Failed to use fortranname from %s\n' %
                    (rout['f2pyenhancements']))
            raise KeyError
    except KeyError:
        name = rout['name']
    return name

def getmultilineblock(rout, blockname, comment=1, counter=0):
    try:
        r = rout['f2pyenhancements'].get(blockname)
    except KeyError:
        return
    if not r:
        return
    if counter > 0 and isinstance(r, str):
        return
    if isinstance(r, list):
        if counter >= len(r):
            return
        r = r[counter]
    if r[:3] == "'''":
        if comment:
            r = '\t/* start ' + blockname + \
                ' multiline (' + repr(counter) + ') */\n' + r[3:]
        else:
            r = r[3:]
        if r[-3:] == "'''":
            if comment:
                r = r[:-3] + '\n\t/* end multiline (' + repr(counter) + ')*/'
            else:
                r = r[:-3]
        else:
            errmess("%s multiline block should end with `'''`: %s\n"
                    % (blockname, repr(r)))
    return r

def getcallstatement(rout):
    return getmultilineblock(rout, 'callstatement')

def getcallprotoargument(rout, cb_map={}):
    r = getmultilineblock(rout, 'callprotoargument', comment=0)
    if r:
        return r
    if hascallstatement(rout):
        outmess(
            'warning: callstatement is defined without callprotoargument\n')
        return
    from .capi_maps import getctype
    arg_types, arg_types2 = [], []
    if l_and(isstringfunction, l_not(isfunction_wrap))(rout):
        arg_types.extend(['char*', 'size_t'])
    for n in rout['args']:
        var = rout['vars'][n]
        if isintent_callback(var):
            continue
        if n in cb_map:
            ctype = cb_map[n] + '_typedef'
        else:
            ctype = getctype(var)
            if l_and(isintent_c, l_or(isscalar, iscomplex))(var):
                pass
            elif isstring(var):
                pass
            else:
                if not isattr_value(var):
                    ctype = ctype + '*'
            if ((isstring(var)
                 or isarrayofstrings(var)  # obsolete?
                 or isstringarray(var))):
                arg_types2.append('size_t')
        arg_types.append(ctype)

proto_args = ','.join(arg_types + arg_types2)
    if not proto_args:
        proto_args = 'void'
    return proto_args

def getusercode(rout):
    return getmultilineblock(rout, 'usercode')

def getusercode1(rout):
    return getmultilineblock(rout, 'usercode', counter=1)

def getpymethoddef(rout):
    return getmultilineblock(rout, 'pymethoddef')

def getargs(rout):
    sortargs, args = [], []
    if 'args' in rout:
        args = rout['args']
        if 'sortvars' in rout:
            for a in rout['sortvars']:
                if a in args:
                    sortargs.append(a)
            for a in args:
                if a not in sortargs:
                    sortargs.append(a)
        else:
            sortargs = rout['args']
    return args, sortargs

def getargs2(rout):
    sortargs, args = [], rout.get('args', [])
    auxvars = [a for a in rout['vars'].keys() if isintent_aux(rout['vars'][a])
               and a not in args]
    args = auxvars + args
    if 'sortvars' in rout:
        for a in rout['sortvars']:
            if a in args:
                sortargs.append(a)
        for a in args:
            if a not in sortargs:
                sortargs.append(a)
    else:
        sortargs = auxvars + rout['args']
    return args, sortargs

def getrestdoc(rout):
    if 'f2pymultilines' not in rout:
        return None
    k = None
    if rout['block'] == 'python module':
        k = rout['block'], rout['name']
    return rout['f2pymultilines'].get(k, None)

def gentitle(name):
    ln = (80 - len(name) - 6) // 2
    return '/*%s %s %s*/' % (ln * '*', name, ln * '*')

def flatlist(lst):
    if isinstance(lst, list):
        return reduce(lambda x, y, f=flatlist: x + f(y), lst, [])
    return [lst]

def stripcomma(s):
    if s and s[-1] == ',':
        return s[:-1]
    return s

def replace(str, d, defaultsep=''):
    if isinstance(d, list):
        return [replace(str, _m, defaultsep) for _m in d]
    if isinstance(str, list):
        return [replace(_m, d, defaultsep) for _m in str]
    for k in 2 * list(d.keys()):
        if k == 'separatorsfor':
            continue
        if 'separatorsfor' in d and k in d['separatorsfor']:
            sep = d['separatorsfor'][k]
        else:
            sep = defaultsep
        if isinstance(d[k], list):
            str = str.replace('#%s#' % (k), sep.join(flatlist(d[k])))
        else:
            str = str.replace('#%s#' % (k), d[k])
    return str

def dictappend(rd, ar):
    if isinstance(ar, list):
        for a in ar:
            rd = dictappend(rd, a)
        return rd
    for k in ar.keys():
        if k[0] == '_':
            continue
        if k in rd:
            if isinstance(rd[k], str):
                rd[k] = [rd[k]]
            if isinstance(rd[k], list):
                if isinstance(ar[k], list):
                    rd[k] = rd[k] + ar[k]
                else:
                    rd[k].append(ar[k])
            elif isinstance(rd[k], dict):
                if isinstance(ar[k], dict):
                    if k == 'separatorsfor':
                        for k1 in ar[k].keys():
                            if k1 not in rd[k]:
                                rd[k][k1] = ar[k][k1]
                    else:
                        rd[k] = dictappend(rd[k], ar[k])
        else:
            rd[k] = ar[k]
    return rd

def applyrules(rules, d, var={}):
    ret = {}
    if isinstance(rules, list):
        for r in rules:
            rr = applyrules(r, d, var)
            ret = dictappend(ret, rr)
            if '_break' in rr:
                break
        return ret
    if '_check' in rules and (not rules['_check'](var)):
        return ret
    if 'need' in rules:
        res = applyrules({'needs': rules['need']}, d, var)
        if 'needs' in res:
            cfuncs.append_needs(res['needs'])

for k in rules.keys():
        if k == 'separatorsfor':
            ret[k] = rules[k]
            continue
        if isinstance(rules[k], str):
            ret[k] = replace(rules[k], d)
        elif isinstance(rules[k], list):
            ret[k] = []
            for i in rules[k]:
                ar = applyrules({k: i}, d, var)
                if k in ar:
                    ret[k].append(ar[k])
        elif k[0] == '_':
            continue
        elif isinstance(rules[k], dict):
            ret[k] = []
            for k1 in rules[k].keys():
                if isinstance(k1, types.FunctionType) and k1(var):
                    if isinstance(rules[k][k1], list):
                        for i in rules[k][k1]:
                            if isinstance(i, dict):
                                res = applyrules({'supertext': i}, d, var)
                                if 'supertext' in res:
                                    i = res['supertext']
                                else:
                                    i = ''
                            ret[k].append(replace(i, d))
                    else:
                        i = rules[k][k1]
                        if isinstance(i, dict):
                            res = applyrules({'supertext': i}, d)
                            if 'supertext' in res:
                                i = res['supertext']
                            else:
                                i = ''
                        ret[k].append(replace(i, d))
        else:
            errmess('applyrules: ignoring rule %s.\n' % repr(rules[k]))
        if isinstance(ret[k], list):
            if len(ret[k]) == 1:
                ret[k] = ret[k][0]
            if ret[k] == []:
                del ret[k]
    return ret

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