# Last Change: Sun Apr 26 05:00 PM 2009 J
# vim:syntax=python
import os
import sys
from os.path import join as pjoin, basename as pbasename, dirname as pdirname
from copy import deepcopy

from numscons import get_pythonlib_dir
from numscons import GetNumpyEnvironment
from numscons import CheckCBLAS
from numscons import write_info

from code_generators.numpy_api import \
    multiarray_api as multiarray_api_dict, \
    ufunc_api as ufunc_api_dict
    
from setup_common import *
from scons_support import CheckBrokenMathlib, define_no_smp, \
    check_mlib, check_mlibs, is_npy_no_signal, CheckInline
from scons_support import array_api_gen_bld, ufunc_api_gen_bld, template_bld, \
                          umath_bld, CheckGCC4, check_api_version, \
                          CheckLongDoubleRepresentation

import SCons

# Set to True to enable multiple file compilations (experimental)
try:
    os.environ['NPY_SEPARATE_COMPILATION']
    ENABLE_SEPARATE_COMPILATION = True
except KeyError:
    ENABLE_SEPARATE_COMPILATION = False
try:
    os.environ['NPY_BYPASS_SINGLE_EXTENDED']
    BYPASS_SINGLE_EXTENDED = True
except KeyError:
    BYPASS_SINGLE_EXTENDED = False

env = GetNumpyEnvironment(ARGUMENTS)
env.Append(CPPPATH = env["PYEXTCPPPATH"])
if os.name == 'nt':
    # NT needs the pythonlib to run any code importing Python.h, including
    # simple code using only typedef and so on, so we need it for configuration
    # checks
    env.AppendUnique(LIBPATH = [get_pythonlib_dir()])

# Check whether we have a mismatch between the set C API VERSION and the
# actual C API VERSION
check_api_version(C_API_VERSION)

#=======================
# Starting Configuration
#=======================
config = env.NumpyConfigure(custom_tests = {'CheckBrokenMathlib' : CheckBrokenMathlib,
    'CheckCBLAS' : CheckCBLAS, 'CheckInline': CheckInline, 'CheckGCC4' : CheckGCC4,
    'CheckLongDoubleRepresentation': CheckLongDoubleRepresentation},
    config_h = pjoin('config.h'))

# numpyconfig_sym will keep the values of some configuration variables, the one
# needed for the public numpy API.

# Convention: list of tuples (definition, value). value:
# - 0: #undef definition
# - 1: #define definition
# - string: #define definition value
numpyconfig_sym = []

#---------------
# Checking Types
#---------------
if not config.CheckHeader("Python.h"):
    errmsg = []
    for line in config.GetLastError():
        errmsg.append("%s " % line)
    print """
Error: Python.h header cannot be compiled (or cannot be found).
On linux, check that you have python-dev/python-devel packages. On windows,
check that you have he platform SDK. You may also use unsupported cflags.
Configuration error log says: \n\n%s""" % ''.join(errmsg)
    Exit(-1)

def check_type(type, include = None):
    st = config.CheckTypeSize(type, includes = include)
    type = type.replace(' ', '_')
    if st:
        numpyconfig_sym.append(('SIZEOF_%s' % type.upper(), '%d' % st))
    else:
        numpyconfig_sym.append(('SIZEOF_%s' % type.upper(), 0))

for type in ('short', 'int', 'long'):
    # SIZEOF_LONG defined on darwin
    if type == "long":
        if not config.CheckDeclaration("SIZEOF_LONG", includes="#include <Python.h>"):
            check_type(type)
        else:
            numpyconfig_sym.append(('SIZEOF_LONG', 'SIZEOF_LONG'))
    else:
        check_type(type)

for type in ('float', 'double', 'long double'):
    sz = config.CheckTypeSize(type)
    numpyconfig_sym.append(('SIZEOF_%s' % type2def(type), str(sz)))

    # Compute size of corresponding complex type: used to check that our
    # definition is binary compatible with C99 complex type (check done at
    # build time in npy_common.h)
    complex_def = "struct {%s __x; %s __y;}" % (type, type)
    sz = config.CheckTypeSize(complex_def)
    numpyconfig_sym.append(('SIZEOF_COMPLEX_%s' % type2def(type), str(sz)))

if sys.platform != 'darwin':
    tp = config.CheckLongDoubleRepresentation()
    config.Define("HAVE_LDOUBLE_%s" % tp, 1,
                  "Define for arch-specific long double representation")

for type in ('Py_intptr_t',):
    check_type(type, include = "#include <Python.h>\n")

# We check declaration AND type because that's how distutils does it.
if config.CheckDeclaration('PY_LONG_LONG', includes = '#include <Python.h>\n'):
    st = config.CheckTypeSize('PY_LONG_LONG',
                              includes = '#include <Python.h>\n')
    assert not st == 0
    numpyconfig_sym.append(('DEFINE_NPY_SIZEOF_LONGLONG',
                            '#define NPY_SIZEOF_LONGLONG %d' % st))
    numpyconfig_sym.append(('DEFINE_NPY_SIZEOF_PY_LONG_LONG',
                            '#define NPY_SIZEOF_PY_LONG_LONG %d' % st))
else:
    numpyconfig_sym.append(('DEFINE_NPY_SIZEOF_LONGLONG', ''))
    numpyconfig_sym.append(('DEFINE_NPY_SIZEOF_PY_LONG_LONG', ''))

if not config.CheckDeclaration('CHAR_BIT', includes= '#include <Python.h>\n'):
    raise RuntimeError(\
"""Config wo CHAR_BIT is not supported with scons: please contact the
maintainer (cdavid)""")

#----------------------
# Checking signal stuff
#----------------------
if is_npy_no_signal():
    numpyconfig_sym.append(('DEFINE_NPY_NO_SIGNAL', '#define NPY_NO_SIGNAL\n'))
    config.Define('__NPY_PRIVATE_NO_SIGNAL',
                  comment = "define to 1 to disable SMP support ")
else:
    numpyconfig_sym.append(('DEFINE_NPY_NO_SIGNAL', ''))

#---------------------
# Checking SMP option
#---------------------
if define_no_smp():
    nosmp = 1
else:
    nosmp = 0
numpyconfig_sym.append(('NPY_NO_SMP', nosmp))

#----------------------------------------------
# Check whether we can use C99 printing formats
#----------------------------------------------
if config.CheckDeclaration(('PRIdPTR'), includes  = '#include <inttypes.h>'):
    numpyconfig_sym.append(('DEFINE_NPY_USE_C99_FORMATS', '#define NPY_USE_C99_FORMATS 1'))
else:
    numpyconfig_sym.append(('DEFINE_NPY_USE_C99_FORMATS', ''))
    
#----------------------
# Checking the mathlib
#----------------------
mlibs = [[], ['m'], ['cpml']]
mathlib = os.environ.get('MATHLIB')
if mathlib:
    mlibs.insert(0, mathlib)

mlib = check_mlibs(config, mlibs)

# XXX: this is ugly: mathlib has nothing to do in a public header file
numpyconfig_sym.append(('MATHLIB', ','.join(mlib)))

#----------------------------------
# Checking the math funcs available
#----------------------------------
# Function to check:
mfuncs = ('expl', 'expf', 'log1p', 'expm1', 'asinh', 'atanhf', 'atanhl',
          'rint', 'trunc')

# Set value to 1 for each defined function (in math lib)
mfuncs_defined = dict([(f, 0) for f in mfuncs])

# Check for mandatory funcs: we barf if a single one of those is not there
if not config.CheckFuncsAtOnce(MANDATORY_FUNCS):
    raise SystemError("One of the required function to build numpy is not"
            " available (the list is %s)." % str(MANDATORY_FUNCS))

# Standard functions which may not be available and for which we have a
# replacement implementation
#
def check_funcs(funcs):
    # Use check_funcs_once first, and if it does not work, test func per
    # func. Return success only if all the functions are available
    st = config.CheckFuncsAtOnce(funcs)
    if not st:
        # Global check failed, check func per func
        for f in funcs:
            st = config.CheckFunc(f, language = 'C')

for f in OPTIONAL_STDFUNCS_MAYBE:
    if config.CheckDeclaration(fname2def(f),
                includes="#include <Python.h>\n#include <math.h>"):
        OPTIONAL_STDFUNCS.remove(f)
check_funcs(OPTIONAL_STDFUNCS)

# C99 functions: float and long double versions
if not BYPASS_SINGLE_EXTENDED:
    check_funcs(C99_FUNCS_SINGLE)
    check_funcs(C99_FUNCS_EXTENDED)

# Normally, isnan and isinf are macro (C99), but some platforms only have
# func, or both func and macro version. Check for macro only, and define
# replacement ones if not found.
# Note: including Python.h is necessary because it modifies some math.h
# definitions
for f in ["isnan", "isinf", "signbit", "isfinite"]:
    includes = """\
#include <Python.h>
#include <math.h>
"""
    st = config.CheckDeclaration(f, includes=includes)
    if st:
        numpyconfig_sym.append(('DEFINE_NPY_HAVE_DECL_%s' % f.upper(),
            '#define NPY_HAVE_DECL_%s' % f.upper()))
    else:
        numpyconfig_sym.append(('DEFINE_NPY_HAVE_DECL_%s' % f.upper(), ''))

inline = config.CheckInline()
config.Define('inline', inline)


if ENABLE_SEPARATE_COMPILATION:
    config.Define("ENABLE_SEPARATE_COMPILATION", 1)
    numpyconfig_sym.append(('DEFINE_NPY_ENABLE_SEPARATE_COMPILATION', '#define NPY_ENABLE_SEPARATE_COMPILATION 1'))
else:
    numpyconfig_sym.append(('DEFINE_NPY_ENABLE_SEPARATE_COMPILATION', ''))

#-----------------------------
# Checking for complex support
#-----------------------------
if config.CheckHeader('complex.h'):
    numpyconfig_sym.append(('DEFINE_NPY_USE_C99_COMPLEX', '#define NPY_USE_C99_COMPLEX 1'))

    for t in C99_COMPLEX_TYPES:
        st = config.CheckType(t, includes='#include <complex.h>')
        if st:
            numpyconfig_sym.append(('DEFINE_NPY_HAVE_%s' % type2def(t),
                                    '#define NPY_HAVE_%s' % type2def(t)))
        else:
            numpyconfig_sym.append(('DEFINE_NPY_HAVE_%s' % type2def(t), ''))

    def check_prec(prec):
        flist = [f + prec for f in C99_COMPLEX_FUNCS]
        st = config.CheckFuncsAtOnce(flist)
        if not st:
            # Global check failed, check func per func
            for f in flist:
                config.CheckFunc(f, language='C')

    check_prec('')
    check_prec('f')
    check_prec('l')

else:
    numpyconfig_sym.append(('DEFINE_NPY_USE_C99_COMPLEX', ''))
    for t in C99_COMPLEX_TYPES:
        numpyconfig_sym.append(('DEFINE_NPY_HAVE_%s' % type2def(t), ''))

def visibility_define():
    if config.CheckGCC4():
        return '__attribute__((visibility("hidden")))'
    else:
        return ''

numpyconfig_sym.append(('VISIBILITY_HIDDEN', visibility_define()))

# Add the C API/ABI versions
numpyconfig_sym.append(('NPY_ABI_VERSION', '0x%.8X' % C_ABI_VERSION))
numpyconfig_sym.append(('NPY_API_VERSION', '0x%.8X' % C_API_VERSION))

# Check whether we need our own wide character support
if not config.CheckDeclaration('Py_UNICODE_WIDE', includes='#include <Python.h>'):
    PYTHON_HAS_UNICODE_WIDE = True
else:
    PYTHON_HAS_UNICODE_WIDE = False

#-------------------------------------------------------
# Define the function PyOS_ascii_strod if not available
#-------------------------------------------------------
if not config.CheckDeclaration('PyOS_ascii_strtod',
                               includes = "#include <Python.h>"):
    if config.CheckFunc('strtod'):
        config.Define('PyOS_ascii_strtod', 'strtod',
                      "Define to a function to use as a replacement for "\
                      "PyOS_ascii_strtod if not available in python header")

#------------------------------------
# DISTUTILS Hack on AMD64 on windows
#------------------------------------
# XXX: this is ugly
if sys.platform=='win32' or os.name=='nt':
    from distutils.msvccompiler import get_build_architecture
    a = get_build_architecture()
    print 'BUILD_ARCHITECTURE: %r, os.name=%r, sys.platform=%r' % \
          (a, os.name, sys.platform)
    if a == 'AMD64':
        distutils_use_sdk = 1
        config.Define('DISTUTILS_USE_SDK', distutils_use_sdk,
                      "define to 1 to disable SMP support ")

    if a == "Intel":
        config.Define('FORCE_NO_LONG_DOUBLE_FORMATTING', 1,
                      "define to 1 to force long double format string to the" \
                      " same as double (Lg -> g)")
#--------------
# Checking Blas
#--------------
if config.CheckCBLAS():
    build_blasdot = 1
else:
    build_blasdot = 0

config.config_h_text += """
#ifndef _NPY_NPY_CONFIG_H_
#error config.h should never be included directly, include npy_config.h instead
#endif
"""

config.Finish()
write_info(env)

#==========
#  Build
#==========

# List of headers which need to be "installed " into the build directory for
# proper in-place build support
generated_headers = []

#---------------------------------------
# Generate the public configuration file
#---------------------------------------
config_dict = {}
# XXX: this is ugly, make the API for config.h and numpyconfig.h similar
for key, value in numpyconfig_sym:
    config_dict['@%s@' % key] = str(value)
env['SUBST_DICT'] = config_dict

include_dir = 'include/numpy'
target = env.SubstInFile(pjoin(include_dir, '_numpyconfig.h'),
        pjoin(include_dir, '_numpyconfig.h.in'))
generated_headers.append(target[0])

env['CONFIG_H_GEN'] = numpyconfig_sym

#---------------------------
# Builder for generated code
#---------------------------
env.Append(BUILDERS = {'GenerateMultiarrayApi' : array_api_gen_bld,
                       'GenerateUfuncApi' : ufunc_api_gen_bld,
                       'GenerateFromTemplate' : template_bld,
                       'GenerateUmath' : umath_bld})

#------------------------
# Generate generated code
#------------------------
scalartypes_src = env.GenerateFromTemplate(
    pjoin('src', 'multiarray', 'scalartypes.c.src'))
umath_funcs_src = env.GenerateFromTemplate(pjoin('src', 'umath', 'funcs.inc.src'))
umath_loops_src = env.GenerateFromTemplate(pjoin('src', 'umath', 'loops.c.src'))
arraytypes_src = env.GenerateFromTemplate(
    pjoin('src', 'multiarray', 'arraytypes.c.src'))
sortmodule_src = env.GenerateFromTemplate(pjoin('src', '_sortmodule.c.src'))
umathmodule_src = env.GenerateFromTemplate(pjoin('src', 'umath',
    'umathmodule.c.src'))
umath_tests_src = env.GenerateFromTemplate(pjoin('src', 'umath',
    'umath_tests.c.src'))
multiarray_tests_src = env.GenerateFromTemplate(pjoin('src', 'multiarray',
    'multiarray_tests.c.src'))
scalarmathmodule_src = env.GenerateFromTemplate(
                            pjoin('src', 'scalarmathmodule.c.src'))

umath = env.GenerateUmath('__umath_generated',
                          pjoin('code_generators', 'generate_umath.py'))

multiarray_api = env.GenerateMultiarrayApi('include/numpy/multiarray_api',
                        [SCons.Node.Python.Value(d) for d in multiarray_api_dict])
generated_headers.append(multiarray_api[0])

ufunc_api = env.GenerateUfuncApi('include/numpy/ufunc_api',
                        [SCons.Node.Python.Value(d) for d in ufunc_api_dict])
generated_headers.append(ufunc_api[0])

# include/numpy is added for compatibility reasons with distutils: this is
# needed for __multiarray_api.c and __ufunc_api.c included from multiarray and
# ufunc.
env.Prepend(CPPPATH = ['src/private', 'include', '.', 'include/numpy'])

# npymath core lib
npymath_src = [env.GenerateFromTemplate(pjoin('src', 'npymath', 'npy_math.c.src')),
               env.GenerateFromTemplate(pjoin('src', 'npymath', 'npy_math_complex.c.src')),
               env.GenerateFromTemplate(pjoin('src', 'npymath', 'ieee754.c.src'))]
env.DistutilsInstalledStaticExtLibrary("npymath", npymath_src, install_dir='lib')
env.Prepend(LIBS=["npymath"])
env.Prepend(LIBPATH=["."])

subst_dict = {'@prefix@': '$distutils_install_prefix',
	      '@pkgname@': 'numpy.core',
              '@sep@': os.path.sep}
npymath_ini = env.SubstInFile(pjoin('lib', 'npy-pkg-config', 'npymath.ini'),
    'npymath.ini.in', SUBST_DICT=subst_dict)

subst_dict = {'@posix_mathlib@': " ".join(['-l%s' % l for l in mlib]),
              '@msvc_mathlib@': " ".join(['%s.mlib' % l for l in mlib])}
mlib_ini = env.SubstInFile(pjoin('lib', 'npy-pkg-config', 'mlib.ini'),
    'mlib.ini.in', SUBST_DICT=subst_dict)
env.Install('$distutils_installdir/lib/npy-pkg-config', mlib_ini)
env.Install('$distutils_installdir/lib/npy-pkg-config', npymath_ini)

#-----------------
# Build multiarray
#-----------------
if ENABLE_SEPARATE_COMPILATION:
    multiarray_src = [pjoin('src', 'multiarray', 'multiarraymodule.c'),
        pjoin('src', 'multiarray', 'hashdescr.c'),
        pjoin('src', 'multiarray', 'arrayobject.c'),
        pjoin('src', 'multiarray', 'numpyos.c'),
        pjoin('src', 'multiarray', 'flagsobject.c'),
        pjoin('src', 'multiarray', 'descriptor.c'),
        pjoin('src', 'multiarray', 'iterators.c'),
        pjoin('src', 'multiarray', 'mapping.c'),
        pjoin('src', 'multiarray', 'number.c'),
        pjoin('src', 'multiarray', 'getset.c'),
        pjoin('src', 'multiarray', 'sequence.c'),
        pjoin('src', 'multiarray', 'methods.c'),
        pjoin('src', 'multiarray', 'ctors.c'),
        pjoin('src', 'multiarray', 'convert_datatype.c'),
        pjoin('src', 'multiarray', 'convert.c'),
        pjoin('src', 'multiarray', 'shape.c'),
        pjoin('src', 'multiarray', 'item_selection.c'),
        pjoin('src', 'multiarray', 'calculation.c'),
        pjoin('src', 'multiarray', 'common.c'),
        pjoin('src', 'multiarray', 'refcount.c'),
        pjoin('src', 'multiarray', 'conversion_utils.c'),
        pjoin('src', 'multiarray', 'usertypes.c'),
        pjoin('src', 'multiarray', 'buffer.c'),
        pjoin('src', 'multiarray', 'scalarapi.c')]
    multiarray_src.extend(arraytypes_src)
    multiarray_src.extend(scalartypes_src)
    if PYTHON_HAS_UNICODE_WIDE:
        multiarray_src.extend([pjoin("src", "multiarray", "ucsnarrow.c")])
else:
    multiarray_src = [pjoin('src', 'multiarray', 'multiarraymodule_onefile.c')]
multiarray = env.DistutilsPythonExtension('multiarray', source = multiarray_src)
env.DistutilsPythonExtension('multiarray_tests', source=multiarray_tests_src)

#------------------
# Build sort module
#------------------
sort = env.DistutilsPythonExtension('_sort', source = sortmodule_src)

#-------------------
# Build umath module
#-------------------
if ENABLE_SEPARATE_COMPILATION:
    umathmodule_src.extend([pjoin('src', 'umath', 'ufunc_object.c')])
    umathmodule_src.extend(umath_loops_src)
else:
    umathmodule_src = [pjoin('src', 'umath', 'umathmodule_onefile.c')]
umathmodule = env.DistutilsPythonExtension('umath', source = umathmodule_src)

#------------------------
# Build scalarmath module
#------------------------
scalarmathmodule = env.DistutilsPythonExtension('scalarmath',
                                            source = scalarmathmodule_src)

#------------------------
# Build scalarmath module
#------------------------
umath_tests = env.DistutilsPythonExtension('umath_tests',
        source=umath_tests_src)

#----------------------
# Build _dotblas module
#----------------------
if build_blasdot:
    dotblas_src = [pjoin('blasdot', i) for i in ['_dotblas.c']]
    # because _dotblas does #include CBLAS_HEADER instead of #include
    # "cblas.h", scons does not detect the dependency
    # XXX: PythonExtension builder does not take the Depends on extension into
    # account for some reason, so we first build the object, with forced
    # dependency, and then builds the extension. This is more likely a bug in
    # our PythonExtension builder, but I cannot see how to solve it.
    dotblas_o = env.PythonObject('_dotblas', source = dotblas_src)
    env.Depends(dotblas_o, pjoin("blasdot", "cblas.h"))
    dotblas = env.DistutilsPythonExtension('_dotblas', dotblas_o)

# "Install" the header in the build directory, so that in-place build works
for h in generated_headers:
    env.Install(pjoin('$distutils_installdir', include_dir), h)