/***********************************************************

Copyright (C) 1997, 2002, 2003 Martin von Loewis

Permission to use, copy, modify, and distribute this software and its

documentation for any purpose and without fee is hereby granted,

provided that the above copyright notice appear in all copies.

This software comes with no warranty. Use at your own risk.

******************************************************************/

#include "Python.h"

#include <stdio.h>

#include <locale.h>

#include <string.h>

#include <ctype.h>

#ifdef HAVE_ERRNO_H

#include <errno.h>

#endif

#ifdef HAVE_LANGINFO_H

#include <langinfo.h>

#endif

#ifdef HAVE_LIBINTL_H

#include <libintl.h>

#endif

#ifdef HAVE_WCHAR_H

#include <wchar.h>

#endif

#if defined(__APPLE__)

#include <CoreFoundation/CoreFoundation.h>

#endif

#if defined(MS_WINDOWS)

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

#endif

#ifdef RISCOS

char *strdup(const char *);

#endif

PyDoc_STRVAR(locale__doc__, "Support for POSIX locales.");

static PyObject *Error;

/* support functions for formatting floating point numbers */

PyDoc_STRVAR(setlocale__doc__,

"(integer,string=None) -> string. Activates/queries locale processing.");

/* the grouping is terminated by either 0 or CHAR_MAX */

static PyObject*

copy_grouping(char* s)

{

    int i;

    PyObject *result, *val = NULL;

    if (s[0] == '\0')

        /* empty string: no grouping at all */

        return PyList_New(0);

    for (i = 0; s[i] != '\0' && s[i] != CHAR_MAX; i++)

        ; /* nothing */

    result = PyList_New(i+1);

    if (!result)

        return NULL;

    i = -1;

    do {

        i++;

        val = PyInt_FromLong(s[i]);

        if (!val)

            break;

        if (PyList_SetItem(result, i, val)) {

            Py_DECREF(val);

            val = NULL;

            break;

        }

    } while (s[i] != '\0' && s[i] != CHAR_MAX);

    if (!val) {

        Py_DECREF(result);

        return NULL;

    }

    return result;

}

static void

fixup_ulcase(void)

{

    PyObject *mods, *strop, *string, *ulo;

    unsigned char ul[256];

    int n, c;

    /* find the string and strop modules */

    mods = PyImport_GetModuleDict();

    if (!mods)

        return;

    string = PyDict_GetItemString(mods, "string");

    if (string)

        string = PyModule_GetDict(string);

    strop=PyDict_GetItemString(mods, "strop");

    if (strop)

        strop = PyModule_GetDict(strop);

    if (!string && !strop)

        return;

    /* create uppercase map string */

    n = 0;

    for (c = 0; c < 256; c++) {

        if (isupper(c))

            ul[n++] = c;

    }

    ulo = PyString_FromStringAndSize((const char *)ul, n);

    if (!ulo)

        return;

    if (string)

        PyDict_SetItemString(string, "uppercase", ulo);

    if (strop)

        PyDict_SetItemString(strop, "uppercase", ulo);

    Py_DECREF(ulo);

    /* create lowercase string */

    n = 0;

    for (c = 0; c < 256; c++) {

        if (islower(c))

            ul[n++] = c;

    }

    ulo = PyString_FromStringAndSize((const char *)ul, n);

    if (!ulo)

        return;

    if (string)

        PyDict_SetItemString(string, "lowercase", ulo);

    if (strop)

        PyDict_SetItemString(strop, "lowercase", ulo);

    Py_DECREF(ulo);

    /* create letters string */

    n = 0;

    for (c = 0; c < 256; c++) {

        if (isalpha(c))

            ul[n++] = c;

    }

    ulo = PyString_FromStringAndSize((const char *)ul, n);

    if (!ulo)

        return;

    if (string)

        PyDict_SetItemString(string, "letters", ulo);

    Py_DECREF(ulo);

}

static PyObject*

PyLocale_setlocale(PyObject* self, PyObject* args)

{

    int category;

    char *locale = NULL, *result;

    PyObject *result_object;

    if (!PyArg_ParseTuple(args, "i|z:setlocale", &category, &locale))

        return NULL;

    if (locale) {

        /* set locale */

        result = setlocale(category, locale);

        if (!result) {

            /* operation failed, no setting was changed */

            PyErr_SetString(Error, "unsupported locale setting");

            return NULL;

        }

        result_object = PyString_FromString(result);

        if (!result_object)

            return NULL;

        /* record changes to LC_CTYPE */

        if (category == LC_CTYPE || category == LC_ALL)

            fixup_ulcase();

        /* things that got wrong up to here are ignored */

        PyErr_Clear();

    } else {

        /* get locale */

        result = setlocale(category, NULL);

        if (!result) {

            PyErr_SetString(Error, "locale query failed");

            return NULL;

        }

        result_object = PyString_FromString(result);

    }

    return result_object;

}

PyDoc_STRVAR(localeconv__doc__,

"() -> dict. Returns numeric and monetary locale-specific parameters.");

static PyObject*

PyLocale_localeconv(PyObject* self)

{

    PyObject* result;

    struct lconv *l;

    PyObject *x;

    result = PyDict_New();

    if (!result)

        return NULL;

    /* if LC_NUMERIC is different in the C library, use saved value */

    l = localeconv();

    /* hopefully, the localeconv result survives the C library calls

       involved herein */

#define RESULT_STRING(s)\

    x = PyString_FromString(l->s);\

    if (!x) goto failed;\

    PyDict_SetItemString(result, #s, x);\

    Py_XDECREF(x)

#define RESULT_INT(i)\

    x = PyInt_FromLong(l->i);\

    if (!x) goto failed;\

    PyDict_SetItemString(result, #i, x);\

    Py_XDECREF(x)

    /* Numeric information */

    RESULT_STRING(decimal_point);

    RESULT_STRING(thousands_sep);

    x = copy_grouping(l->grouping);

    if (!x)

        goto failed;

    PyDict_SetItemString(result, "grouping", x);

    Py_XDECREF(x);

    /* Monetary information */

    RESULT_STRING(int_curr_symbol);

    RESULT_STRING(currency_symbol);

    RESULT_STRING(mon_decimal_point);

    RESULT_STRING(mon_thousands_sep);

    x = copy_grouping(l->mon_grouping);

    if (!x)

        goto failed;

    PyDict_SetItemString(result, "mon_grouping", x);

    Py_XDECREF(x);

    RESULT_STRING(positive_sign);

    RESULT_STRING(negative_sign);

    RESULT_INT(int_frac_digits);

    RESULT_INT(frac_digits);

    RESULT_INT(p_cs_precedes);

    RESULT_INT(p_sep_by_space);

    RESULT_INT(n_cs_precedes);

    RESULT_INT(n_sep_by_space);

    RESULT_INT(p_sign_posn);

    RESULT_INT(n_sign_posn);

    return result;

  failed:

    Py_XDECREF(result);

    Py_XDECREF(x);

    return NULL;

}

PyDoc_STRVAR(strcoll__doc__,

"string,string -> int. Compares two strings according to the locale.");

static PyObject*

PyLocale_strcoll(PyObject* self, PyObject* args)

{

#if !defined(HAVE_WCSCOLL) || !defined(Py_USING_UNICODE)

    char *s1,*s2;

    if (!PyArg_ParseTuple(args, "ss:strcoll", &s1, &s2))

        return NULL;

    return PyInt_FromLong(strcoll(s1, s2));

#else

    PyObject *os1, *os2, *result = NULL;

    wchar_t *ws1 = NULL, *ws2 = NULL;

    int rel1 = 0, rel2 = 0, len1, len2;

    if (!PyArg_UnpackTuple(args, "strcoll", 2, 2, &os1, &os2))

        return NULL;

    /* If both arguments are byte strings, use strcoll.  */

    if (PyString_Check(os1) && PyString_Check(os2))

        return PyInt_FromLong(strcoll(PyString_AS_STRING(os1),

                                      PyString_AS_STRING(os2)));

    /* If neither argument is unicode, it's an error.  */

    if (!PyUnicode_Check(os1) && !PyUnicode_Check(os2)) {

        PyErr_SetString(PyExc_ValueError, "strcoll arguments must be strings");

    }

    /* Convert the non-unicode argument to unicode. */

    if (!PyUnicode_Check(os1)) {

        os1 = PyUnicode_FromObject(os1);

        if (!os1)

            return NULL;

        rel1 = 1;

    }

    if (!PyUnicode_Check(os2)) {

        os2 = PyUnicode_FromObject(os2);

        if (!os2) {

            if (rel1) {

                Py_DECREF(os1);

            }

            return NULL;

        } 

        rel2 = 1;

    }

    /* Convert the unicode strings to wchar[]. */

    len1 = PyUnicode_GET_SIZE(os1) + 1;

    ws1 = PyMem_MALLOC(len1 * sizeof(wchar_t));

    if (!ws1) {

        PyErr_NoMemory();

        goto done;

    }

    if (PyUnicode_AsWideChar((PyUnicodeObject*)os1, ws1, len1) == -1)

        goto done;

    ws1[len1 - 1] = 0;

    len2 = PyUnicode_GET_SIZE(os2) + 1;

    ws2 = PyMem_MALLOC(len2 * sizeof(wchar_t));

    if (!ws2) {

        PyErr_NoMemory();

        goto done;

    }

    if (PyUnicode_AsWideChar((PyUnicodeObject*)os2, ws2, len2) == -1)

        goto done;

    ws2[len2 - 1] = 0;

    /* Collate the strings. */

    result = PyInt_FromLong(wcscoll(ws1, ws2));

  done:

    /* Deallocate everything. */

    if (ws1) PyMem_FREE(ws1);

    if (ws2) PyMem_FREE(ws2);

    if (rel1) {

        Py_DECREF(os1);

    }

    if (rel2) {

        Py_DECREF(os2);

    }

    return result;

#endif

}

PyDoc_STRVAR(strxfrm__doc__,

"string -> string. Returns a string that behaves for cmp locale-aware.");

static PyObject*

PyLocale_strxfrm(PyObject* self, PyObject* args)

{

    char *s, *buf;

    size_t n1, n2;

    PyObject *result;

    if (!PyArg_ParseTuple(args, "s:strxfrm", &s))

        return NULL;

    /* assume no change in size, first */

    n1 = strlen(s) + 1;

    buf = PyMem_Malloc(n1);

    if (!buf)

        return PyErr_NoMemory();

    n2 = strxfrm(buf, s, n1) + 1;

    if (n2 > n1) {

        /* more space needed */

        buf = PyMem_Realloc(buf, n2);

        if (!buf)

            return PyErr_NoMemory();

        strxfrm(buf, s, n2);

    }

    result = PyString_FromString(buf);

    PyMem_Free(buf);

    return result;

}

#if defined(MS_WINDOWS)

static PyObject*

PyLocale_getdefaultlocale(PyObject* self)

{

    char encoding[100];

    char locale[100];

    PyOS_snprintf(encoding, sizeof(encoding), "cp%d", GetACP());

    if (GetLocaleInfo(LOCALE_USER_DEFAULT,

                      LOCALE_SISO639LANGNAME,

                      locale, sizeof(locale))) {

        Py_ssize_t i = strlen(locale);

        locale[i++] = '_';

        if (GetLocaleInfo(LOCALE_USER_DEFAULT,

                          LOCALE_SISO3166CTRYNAME,

                          locale+i, (int)(sizeof(locale)-i)))

            return Py_BuildValue("ss", locale, encoding);

    }

    /* If we end up here, this windows version didn't know about

       ISO639/ISO3166 names (it's probably Windows 95).  Return the

       Windows language identifier instead (a hexadecimal number) */

    locale[0] = '0';

    locale[1] = 'x';

    if (GetLocaleInfo(LOCALE_USER_DEFAULT, LOCALE_IDEFAULTLANGUAGE,

                      locale+2, sizeof(locale)-2)) {

        return Py_BuildValue("ss", locale, encoding);

    }

    /* cannot determine the language code (very unlikely) */

    Py_INCREF(Py_None);

    return Py_BuildValue("Os", Py_None, encoding);

}

#endif

#if defined(__APPLE__)

/*

** Find out what the current script is.

** Donated by Fredrik Lundh.

*/

static char *mac_getscript(void)

{

    CFStringEncoding enc = CFStringGetSystemEncoding();

    static CFStringRef name = NULL;

    /* Return the code name for the encodings for which we have codecs. */

    switch(enc) {

    case kCFStringEncodingMacRoman: return "mac-roman";

    case kCFStringEncodingMacGreek: return "mac-greek";

    case kCFStringEncodingMacCyrillic: return "mac-cyrillic";

    case kCFStringEncodingMacTurkish: return "mac-turkish";

    case kCFStringEncodingMacIcelandic: return "mac-icelandic";

    /* XXX which one is mac-latin2? */

    }

    if (!name) {

        /* This leaks an object. */

        name = CFStringConvertEncodingToIANACharSetName(enc);

    }

    return (char *)CFStringGetCStringPtr(name, 0); 

}

static PyObject*

PyLocale_getdefaultlocale(PyObject* self)

{

    return Py_BuildValue("Os", Py_None, mac_getscript());

}

#endif

#ifdef HAVE_LANGINFO_H

#define LANGINFO(X) {#X, X}

static struct langinfo_constant{

	char* name;

	int value;

} langinfo_constants[] = 

{

    /* These constants should exist on any langinfo implementation */

    LANGINFO(DAY_1),

    LANGINFO(DAY_2),

    LANGINFO(DAY_3),

    LANGINFO(DAY_4),

    LANGINFO(DAY_5),

    LANGINFO(DAY_6),

    LANGINFO(DAY_7),

    LANGINFO(ABDAY_1),

    LANGINFO(ABDAY_2),

    LANGINFO(ABDAY_3),

    LANGINFO(ABDAY_4),

    LANGINFO(ABDAY_5),

    LANGINFO(ABDAY_6),

    LANGINFO(ABDAY_7),

    LANGINFO(MON_1),

    LANGINFO(MON_2),

    LANGINFO(MON_3),

    LANGINFO(MON_4),

    LANGINFO(MON_5),

    LANGINFO(MON_6),

    LANGINFO(MON_7),

    LANGINFO(MON_8),

    LANGINFO(MON_9),

    LANGINFO(MON_10),

    LANGINFO(MON_11),

    LANGINFO(MON_12),

    LANGINFO(ABMON_1),

    LANGINFO(ABMON_2),

    LANGINFO(ABMON_3),

    LANGINFO(ABMON_4),

    LANGINFO(ABMON_5),

    LANGINFO(ABMON_6),

    LANGINFO(ABMON_7),

    LANGINFO(ABMON_8),

    LANGINFO(ABMON_9),

    LANGINFO(ABMON_10),

    LANGINFO(ABMON_11),

    LANGINFO(ABMON_12),

#ifdef RADIXCHAR

    /* The following are not available with glibc 2.0 */

    LANGINFO(RADIXCHAR),

    LANGINFO(THOUSEP),

    /* YESSTR and NOSTR are deprecated in glibc, since they are

       a special case of message translation, which should be rather

       done using gettext. So we don't expose it to Python in the

       first place.

    LANGINFO(YESSTR),

    LANGINFO(NOSTR),

    */

    LANGINFO(CRNCYSTR),

#endif

    LANGINFO(D_T_FMT),

    LANGINFO(D_FMT),

    LANGINFO(T_FMT),

    LANGINFO(AM_STR),

    LANGINFO(PM_STR),

    /* The following constants are available only with XPG4, but...

       AIX 3.2. only has CODESET.

       OpenBSD doesn't have CODESET but has T_FMT_AMPM, and doesn't have

       a few of the others.

       Solution: ifdef-test them all. */

#ifdef CODESET

    LANGINFO(CODESET),

#endif

#ifdef T_FMT_AMPM

    LANGINFO(T_FMT_AMPM),

#endif

#ifdef ERA