/* Copyright (C) 2006-2014, 2017 Free Software Foundation, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 3 of * the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301 USA */ #ifdef HAVE_CONFIG_H # include #endif #include #include "libguile/_scm.h" #include "libguile/extensions.h" #include "libguile/feature.h" #include "libguile/i18n.h" #include "libguile/strings.h" #include "libguile/chars.h" #include "libguile/dynwind.h" #include "libguile/validate.h" #include "libguile/values.h" #include "libguile/threads.h" #include #include /* `strcoll ()' */ #include /* `toupper ()' et al. */ #include #include #include #if defined HAVE_NEWLOCALE && defined HAVE_STRCOLL_L && defined HAVE_USELOCALE /* The GNU thread-aware locale API is documented in ``Thread-Aware Locale Model, a Proposal'', by Ulrich Drepper: http://people.redhat.com/drepper/tllocale.ps.gz It is now also implemented by Darwin: http://developer.apple.com/documentation/Darwin/Reference/ManPages/man3/newlocale.3.html The whole API was eventually standardized in the ``Open Group Base Specifications Issue 7'' (aka. "POSIX 2008"): http://www.opengroup.org/onlinepubs/9699919799/basedefs/locale.h.html */ # define USE_GNU_LOCALE_API #endif #include "libguile/posix.h" /* for `scm_i_locale_mutex' */ /* Use Gnulib's header, which also provides `nl_item' & co. */ #include #ifndef HAVE_SETLOCALE static inline char * setlocale (int category, const char *name) { errno = ENOSYS; return NULL; } #endif /* Helper stringification macro. */ #define SCM_I18N_STRINGIFY(_name) # _name /* Acquiring and releasing the locale lock. */ static inline void lock_locale_mutex (void) { #ifdef HAVE_POSIX scm_i_pthread_mutex_lock (&scm_i_locale_mutex); #else #endif } static inline void unlock_locale_mutex (void) { #ifdef HAVE_POSIX scm_i_pthread_mutex_unlock (&scm_i_locale_mutex); #else #endif } /* Locale objects, string and character collation, and other locale-dependent string operations. A large part of the code here deals with emulating glibc's reentrant locale API on non-GNU systems. The emulation is a bit "brute-force": Whenever a `-locale _name = strdup (locale_name); \ if (settings-> _name == NULL) \ goto handle_oom; \ } #include "locale-categories.h" #undef SCM_DEFINE_LOCALE_CATEGORY return 0; handle_error: return EINVAL; handle_oom: return ENOMEM; } /* Restore locale settings SETTINGS. On success, return zero. */ static int restore_locale_settings (const scm_t_locale_settings *settings) { const char *result; #define SCM_DEFINE_LOCALE_CATEGORY(_name) \ SCM_SYSCALL (result = setlocale (LC_ ## _name, settings-> _name)); \ if (result == NULL) \ goto handle_error; #include "locale-categories.h" #undef SCM_DEFINE_LOCALE_CATEGORY return 0; handle_error: return EINVAL; } /* Free memory associated with SETTINGS. */ static void free_locale_settings (scm_t_locale_settings *settings) { #define SCM_DEFINE_LOCALE_CATEGORY(_name) \ free (settings-> _name); \ settings->_name = NULL; #include "locale-categories.h" #undef SCM_DEFINE_LOCALE_CATEGORY } /* Install the locale named LOCALE_NAME for all the categories listed in CATEGORY_MASK. */ static int install_locale_categories (const char *locale_name, int category_mask) { const char *result; if (category_mask == LC_ALL_MASK) { SCM_SYSCALL (result = setlocale (LC_ALL, locale_name)); if (result == NULL) goto handle_error; } else { #define SCM_DEFINE_LOCALE_CATEGORY(_name) \ if (category_mask & SCM_LOCALE_CATEGORY_MASK (_name)) \ { \ SCM_SYSCALL (result = setlocale (LC_ ## _name, locale_name)); \ if (result == NULL) \ goto handle_error; \ } #include "locale-categories.h" #undef SCM_DEFINE_LOCALE_CATEGORY } return 0; handle_error: return EINVAL; } /* Install LOCALE, recursively installing its base locales first. On success, zero is returned. */ static int install_locale (scm_t_locale locale) { scm_t_locale stack[LOCALE_STACK_SIZE_MAX]; int category_mask = 0; size_t stack_size = 0; int stack_offset = 0; const char *result = NULL; /* Build up a locale stack by traversing the `base_locale' link. */ do { if (stack_size >= LOCALE_STACK_SIZE_MAX) /* We cannot use `scm_error ()' here because otherwise the locale mutex may remain locked. */ return EINVAL; stack[stack_size++] = locale; /* Keep track of which categories have already been taken into account. */ category_mask |= locale->category_mask; if (!SCM_UNBNDP (locale->base_locale)) locale = (scm_t_locale) SCM_SMOB_DATA (locale->base_locale); else locale = NULL; } while ((locale != NULL) && (category_mask != LC_ALL_MASK)); /* Install the C locale to start from a pristine state. */ SCM_SYSCALL (result = setlocale (LC_ALL, "C")); if (result == NULL) goto handle_error; /* Install the locales in reverse order. */ for (stack_offset = stack_size - 1; stack_offset >= 0; stack_offset--) { int err; scm_t_locale locale; locale = stack[stack_offset]; err = install_locale_categories (locale->locale_name, locale->category_mask); if (err) goto handle_error; } return 0; handle_error: return EINVAL; } /* Leave the locked locale section. */ static inline void leave_locale_section (const scm_t_locale_settings *settings) { /* Restore the previous locale settings. */ (void)restore_locale_settings (settings); unlock_locale_mutex (); } /* Enter a locked locale section. */ static inline int enter_locale_section (scm_t_locale locale, scm_t_locale_settings *prev_locale) { int err; lock_locale_mutex (); err = get_current_locale_settings (prev_locale); if (err) { unlock_locale_mutex (); return err; } err = install_locale (locale); if (err) { leave_locale_section (prev_locale); free_locale_settings (prev_locale); } return err; } /* Convenient macro to run STATEMENT in the locale context of C_LOCALE. */ #define RUN_IN_LOCALE_SECTION(_c_locale, _statement) \ do \ { \ int lsec_err; \ scm_t_locale_settings lsec_prev_locale; \ \ lsec_err = enter_locale_section ((_c_locale), &lsec_prev_locale); \ if (lsec_err) \ scm_locale_error (FUNC_NAME, lsec_err); \ else \ { \ _statement ; \ \ leave_locale_section (&lsec_prev_locale); \ free_locale_settings (&lsec_prev_locale); \ } \ } \ while (0) /* Convert the current locale settings into a locale SMOB. On success, zero is returned and RESULT points to the new SMOB. Otherwise, an error is returned. */ static int get_current_locale (SCM *result) { int err = 0; scm_t_locale c_locale; const char *current_locale; c_locale = scm_gc_malloc (sizeof (* c_locale), "locale"); lock_locale_mutex (); c_locale->category_mask = LC_ALL_MASK; c_locale->base_locale = SCM_UNDEFINED; current_locale = setlocale (LC_ALL, NULL); if (current_locale != NULL) c_locale->locale_name = scm_gc_strdup (current_locale, "locale"); else err = EINVAL; unlock_locale_mutex (); if (err == 0) SCM_NEWSMOB (*result, scm_tc16_locale_smob_type, c_locale); else *result = SCM_BOOL_F; return err; } #else /* USE_GNU_LOCALE_API */ /* Convenient macro to run STATEMENT in the locale context of C_LOCALE. */ #define RUN_IN_LOCALE_SECTION(_c_locale, _statement) \ do \ { \ scm_t_locale old_loc; \ \ old_loc = uselocale (_c_locale); \ _statement ; \ uselocale (old_loc); \ } \ while (0) #endif /* USE_GNU_LOCALE_API */ /* `make-locale' can take either category lists or single categories (the `LC_*' integer constants). */ #define SCM_LIST_OR_INTEGER_P(arg) \ (scm_is_integer (arg) || scm_is_true (scm_list_p (arg))) /* Return the category mask corresponding to CATEGORY (an `LC_' integer constant). */ static inline int category_to_category_mask (SCM category, const char *func_name, int pos) { int c_category; int c_category_mask; c_category = scm_to_int (category); #define SCM_DEFINE_LOCALE_CATEGORY(_name) \ case LC_ ## _name: \ c_category_mask = SCM_LOCALE_CATEGORY_MASK (_name); \ break; switch (c_category) { #include "locale-categories.h" case LC_ALL: c_category_mask = LC_ALL_MASK; break; default: scm_wrong_type_arg_msg (func_name, pos, category, "locale category"); } #undef SCM_DEFINE_LOCALE_CATEGORY return c_category_mask; } /* Convert CATEGORIES, a list of locale categories or a single category (an integer), into a category mask. */ static int category_list_to_category_mask (SCM categories, const char *func_name, int pos) { int c_category_mask = 0; if (scm_is_integer (categories)) c_category_mask = category_to_category_mask (categories, func_name, pos); else for (; !scm_is_null (categories); categories = SCM_CDR (categories)) { SCM category = SCM_CAR (categories); c_category_mask |= category_to_category_mask (category, func_name, pos); } return c_category_mask; } SCM_DEFINE (scm_make_locale, "make-locale", 2, 1, 0, (SCM category_list, SCM locale_name, SCM base_locale), "Return a reference to a data structure representing a set of " "locale datasets. @var{category_list} should be either a list " "of locale categories or a single category as used with " "@code{setlocale} (@pxref{Locales, @code{setlocale}}) and " "@var{locale_name} should be the name of the locale considered " "(e.g., @code{\"sl_SI\"}). Optionally, if @code{base_locale} is " "passed, it should be a locale object denoting settings for " "categories not listed in @var{category_list}.") #define FUNC_NAME s_scm_make_locale { SCM locale = SCM_BOOL_F; int err = 0; int c_category_mask; char *c_locale_name; scm_t_locale c_base_locale, c_locale; SCM_MAKE_VALIDATE (1, category_list, LIST_OR_INTEGER_P); SCM_VALIDATE_STRING (2, locale_name); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (3, base_locale, c_base_locale); c_category_mask = category_list_to_category_mask (category_list, FUNC_NAME, 1); c_locale_name = scm_to_locale_string (locale_name); #ifdef USE_GNU_LOCALE_API if (scm_is_eq (base_locale, SCM_VARIABLE_REF (scm_global_locale))) c_base_locale = LC_GLOBAL_LOCALE; if (c_base_locale != (locale_t) 0) { /* C_BASE_LOCALE is to be consumed by `newlocale ()' so it needs to be duplicated before. */ c_base_locale = duplocale (c_base_locale); if (c_base_locale == (locale_t) 0) { err = errno; goto fail; } } c_locale = newlocale (c_category_mask, c_locale_name, c_base_locale); free (c_locale_name); c_locale_name = NULL; if (c_locale == (locale_t) 0) { if (c_base_locale != (locale_t) 0) freelocale (c_base_locale); scm_locale_error (FUNC_NAME, errno); } else SCM_NEWSMOB (locale, scm_tc16_locale_smob_type, c_locale); #else c_locale = scm_gc_malloc (sizeof (* c_locale), "locale"); c_locale->category_mask = c_category_mask; c_locale->locale_name = scm_gc_strdup (c_locale_name, "locale"); free (c_locale_name); c_locale_name = NULL; if (scm_is_eq (base_locale, SCM_VARIABLE_REF (scm_global_locale))) { /* Get the current locale settings and turn them into a locale object. */ err = get_current_locale (&base_locale); if (err) goto fail; } c_locale->base_locale = base_locale; { /* Try out the new locale and raise an exception if it doesn't work. */ int err; scm_t_locale_settings prev_locale; err = enter_locale_section (c_locale, &prev_locale); if (err) goto fail; else { leave_locale_section (&prev_locale); SCM_NEWSMOB (locale, scm_tc16_locale_smob_type, c_locale); } } /* silence gcc's unused variable warning */ (void) c_base_locale; #endif return locale; fail: #ifndef USE_GNU_LOCALE_API scm_gc_free (c_locale, sizeof (* c_locale), "locale"); #endif free (c_locale_name); scm_locale_error (FUNC_NAME, err); return SCM_BOOL_F; } #undef FUNC_NAME SCM_DEFINE (scm_locale_p, "locale?", 1, 0, 0, (SCM obj), "Return true if @var{obj} is a locale object.") #define FUNC_NAME s_scm_locale_p { return scm_from_bool (SCM_SMOB_PREDICATE (scm_tc16_locale_smob_type, obj)); } #undef FUNC_NAME /* Locale-dependent string comparison. A similar API can be found in MzScheme starting from version 200: http://download.plt-scheme.org/chronology/mzmr200alpha14.html . */ #define SCM_STRING_TO_U32_BUF(s1, c_s1) \ do \ { \ if (scm_i_is_narrow_string (s1)) \ { \ size_t i, len; \ const char *buf = scm_i_string_chars (s1); \ \ len = scm_i_string_length (s1); \ c_s1 = alloca (sizeof (scm_t_wchar) * (len + 1)); \ \ for (i = 0; i < len; i ++) \ c_s1[i] = (unsigned char ) buf[i]; \ c_s1[len] = 0; \ } \ else \ c_s1 = (scm_t_wchar *) scm_i_string_wide_chars (s1); \ } while (0) /* Compare UTF-32 strings according to LOCALE. Returns a negative value if S1 compares smaller than S2, a positive value if S1 compares larger than S2, or 0 if they compare equal. */ static inline int compare_u32_strings (SCM s1, SCM s2, SCM locale, const char *func_name) #define FUNC_NAME func_name { int result; scm_t_locale c_locale; scm_t_wchar *c_s1, *c_s2; SCM_VALIDATE_OPTIONAL_LOCALE_COPY (3, locale, c_locale); SCM_STRING_TO_U32_BUF (s1, c_s1); SCM_STRING_TO_U32_BUF (s2, c_s2); if (c_locale) RUN_IN_LOCALE_SECTION (c_locale, result = u32_strcoll ((const scm_t_uint32 *) c_s1, (const scm_t_uint32 *) c_s2)); else result = u32_strcoll ((const scm_t_uint32 *) c_s1, (const scm_t_uint32 *) c_s2); scm_remember_upto_here_2 (s1, s2); scm_remember_upto_here (locale); return result; } #undef FUNC_NAME /* Return the current language of the locale. */ static const char * locale_language () { /* Note: If the locale has been set with 'uselocale', uc_locale_language from libunistring versions 0.9.1 and older will return the incorrect (non-thread-specific) locale. This is fixed in versions 0.9.2 and newer. */ return uc_locale_language (); } static inline int u32_locale_casecoll (const char *func_name, const scm_t_uint32 *c_s1, const scm_t_uint32 *c_s2, int *result) { /* Note: Since this is called from `RUN_IN_LOCALE_SECTION', it must note make any non-local exit. */ int ret; const char *loc = locale_language (); ret = u32_casecoll (c_s1, u32_strlen (c_s1), c_s2, u32_strlen (c_s2), loc, UNINORM_NFC, result); return ret == 0 ? ret : errno; } static inline int compare_u32_strings_ci (SCM s1, SCM s2, SCM locale, const char *func_name) #define FUNC_NAME func_name { int result, ret = 0; scm_t_locale c_locale; scm_t_wchar *c_s1, *c_s2; SCM_VALIDATE_OPTIONAL_LOCALE_COPY (3, locale, c_locale); SCM_STRING_TO_U32_BUF (s1, c_s1); SCM_STRING_TO_U32_BUF (s2, c_s2); if (c_locale) RUN_IN_LOCALE_SECTION (c_locale, ret = u32_locale_casecoll (func_name, (const scm_t_uint32 *) c_s1, (const scm_t_uint32 *) c_s2, &result)); else ret = u32_locale_casecoll (func_name, (const scm_t_uint32 *) c_s1, (const scm_t_uint32 *) c_s2, &result); if (SCM_UNLIKELY (ret != 0)) { errno = ret; scm_syserror (FUNC_NAME); } scm_remember_upto_here_2 (s1, s2); scm_remember_upto_here (locale); return result; } #undef FUNC_NAME SCM_DEFINE (scm_string_locale_lt, "string-locale?", 2, 1, 0, (SCM s1, SCM s2, SCM locale), "Compare strings @var{s1} and @var{s2} in a locale-dependent way." "If @var{locale} is provided, it should be locale object (as " "returned by @code{make-locale}) and will be used to perform the " "comparison; otherwise, the current system locale is used.") #define FUNC_NAME s_scm_string_locale_gt { int result; SCM_VALIDATE_STRING (1, s1); SCM_VALIDATE_STRING (2, s2); result = compare_u32_strings (s1, s2, locale, FUNC_NAME); return scm_from_bool (result > 0); } #undef FUNC_NAME SCM_DEFINE (scm_string_locale_ci_lt, "string-locale-ci?", 2, 1, 0, (SCM s1, SCM s2, SCM locale), "Compare strings @var{s1} and @var{s2} in a case-insensitive, " "and locale-dependent way. If @var{locale} is provided, it " "should be locale object (as returned by @code{make-locale}) " "and will be used to perform the comparison; otherwise, the " "current system locale is used.") #define FUNC_NAME s_scm_string_locale_ci_gt { int result; SCM_VALIDATE_STRING (1, s1); SCM_VALIDATE_STRING (2, s2); result = compare_u32_strings_ci (s1, s2, locale, FUNC_NAME); return scm_from_bool (result > 0); } #undef FUNC_NAME SCM_DEFINE (scm_string_locale_ci_eq, "string-locale-ci=?", 2, 1, 0, (SCM s1, SCM s2, SCM locale), "Compare strings @var{s1} and @var{s2} in a case-insensitive, " "and locale-dependent way. If @var{locale} is provided, it " "should be locale object (as returned by @code{make-locale}) " "and will be used to perform the comparison; otherwise, the " "current system locale is used.") #define FUNC_NAME s_scm_string_locale_ci_eq { int result; SCM_VALIDATE_STRING (1, s1); SCM_VALIDATE_STRING (2, s2); result = compare_u32_strings_ci (s1, s2, locale, FUNC_NAME); return scm_from_bool (result == 0); } #undef FUNC_NAME SCM_DEFINE (scm_char_locale_lt, "char-locale?", 2, 1, 0, (SCM c1, SCM c2, SCM locale), "Return true if character @var{c1} is greater than @var{c2} " "according to @var{locale} or to the current locale.") #define FUNC_NAME s_scm_char_locale_gt { int result; SCM_VALIDATE_CHAR (1, c1); SCM_VALIDATE_CHAR (2, c2); result = compare_u32_strings (scm_string (scm_list_1 (c1)), scm_string (scm_list_1 (c2)), locale, FUNC_NAME); return scm_from_bool (result > 0); } #undef FUNC_NAME SCM_DEFINE (scm_char_locale_ci_lt, "char-locale-ci?", 2, 1, 0, (SCM c1, SCM c2, SCM locale), "Return true if character @var{c1} is greater than @var{c2}, " "in a case insensitive way according to @var{locale} or to " "the current locale.") #define FUNC_NAME s_scm_char_locale_ci_gt { int result; SCM_VALIDATE_CHAR (1, c1); SCM_VALIDATE_CHAR (2, c2); result = compare_u32_strings_ci (scm_string (scm_list_1 (c1)), scm_string (scm_list_1 (c2)), locale, FUNC_NAME); return scm_from_bool (result > 0); } #undef FUNC_NAME SCM_DEFINE (scm_char_locale_ci_eq, "char-locale-ci=?", 2, 1, 0, (SCM c1, SCM c2, SCM locale), "Return true if character @var{c1} is equal to @var{c2}, " "in a case insensitive way according to @var{locale} or to " "the current locale.") #define FUNC_NAME s_scm_char_locale_ci_eq { int result; SCM_VALIDATE_CHAR (1, c1); SCM_VALIDATE_CHAR (2, c2); result = compare_u32_strings_ci (scm_string (scm_list_1 (c1)), scm_string (scm_list_1 (c2)), locale, FUNC_NAME); return scm_from_bool (result == 0); } #undef FUNC_NAME /* Locale-dependent alphabetic character mapping. */ static inline int u32_locale_tocase (const scm_t_uint32 *c_s1, size_t len, scm_t_uint32 **p_c_s2, size_t * p_len2, scm_t_uint32 *(*func) (const scm_t_uint32 *, size_t, const char *, uninorm_t, scm_t_uint32 *, size_t *)) { /* Note: Since this is called from `RUN_IN_LOCALE_SECTION', it must not make any non-local exit. */ scm_t_uint32 *ret; const char *loc = locale_language (); /* The first NULL here indicates that no NFC or NFKC normalization is done. The second NULL means the return buffer is malloc'ed here. */ ret = func (c_s1, len, loc, NULL, NULL, p_len2); if (ret == NULL) { *p_c_s2 = (scm_t_uint32 *) NULL; *p_len2 = 0; return errno; } *p_c_s2 = ret; return 0; } static SCM chr_to_case (SCM chr, scm_t_locale c_locale, scm_t_uint32 *(*func) (const scm_t_uint32 *, size_t, const char *, uninorm_t, scm_t_uint32 *, size_t *), const char *func_name, int *err) #define FUNC_NAME func_name { int ret; scm_t_uint32 c; scm_t_uint32 *convbuf; size_t convlen; SCM convchar; c = SCM_CHAR (chr); if (c_locale != NULL) RUN_IN_LOCALE_SECTION (c_locale, ret = u32_locale_tocase (&c, 1, &convbuf, &convlen, func)); else ret = u32_locale_tocase (&c, 1, &convbuf, &convlen, func); if (SCM_UNLIKELY (ret != 0)) { *err = ret; return SCM_BOOL_F; } if (convlen == 1) convchar = SCM_MAKE_CHAR ((scm_t_wchar) convbuf[0]); else convchar = chr; free (convbuf); return convchar; } #undef FUNC_NAME SCM_DEFINE (scm_char_locale_downcase, "char-locale-downcase", 1, 1, 0, (SCM chr, SCM locale), "Return the lowercase character that corresponds to @var{chr} " "according to either @var{locale} or the current locale.") #define FUNC_NAME s_scm_char_locale_downcase { scm_t_locale c_locale; SCM ret; int err = 0; SCM_VALIDATE_CHAR (1, chr); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (2, locale, c_locale); ret = chr_to_case (chr, c_locale, u32_tolower, FUNC_NAME, &err); if (err != 0) { errno = err; scm_syserror (FUNC_NAME); } return ret; } #undef FUNC_NAME SCM_DEFINE (scm_char_locale_upcase, "char-locale-upcase", 1, 1, 0, (SCM chr, SCM locale), "Return the uppercase character that corresponds to @var{chr} " "according to either @var{locale} or the current locale.") #define FUNC_NAME s_scm_char_locale_upcase { scm_t_locale c_locale; SCM ret; int err = 0; SCM_VALIDATE_CHAR (1, chr); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (2, locale, c_locale); ret = chr_to_case (chr, c_locale, u32_toupper, FUNC_NAME, &err); if (err != 0) { errno = err; scm_syserror (FUNC_NAME); } return ret; } #undef FUNC_NAME SCM_DEFINE (scm_char_locale_titlecase, "char-locale-titlecase", 1, 1, 0, (SCM chr, SCM locale), "Return the titlecase character that corresponds to @var{chr} " "according to either @var{locale} or the current locale.") #define FUNC_NAME s_scm_char_locale_titlecase { scm_t_locale c_locale; SCM ret; int err = 0; SCM_VALIDATE_CHAR (1, chr); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (2, locale, c_locale); ret = chr_to_case (chr, c_locale, u32_totitle, FUNC_NAME, &err); if (err != 0) { errno = err; scm_syserror (FUNC_NAME); } return ret; } #undef FUNC_NAME static SCM str_to_case (SCM str, scm_t_locale c_locale, scm_t_uint32 *(*func) (const scm_t_uint32 *, size_t, const char *, uninorm_t, scm_t_uint32 *, size_t *), const char *func_name, int *err) #define FUNC_NAME func_name { scm_t_wchar *c_str, *c_buf; scm_t_uint32 *c_convstr; size_t len, convlen; int ret; SCM convstr; len = scm_i_string_length (str); if (len == 0) return scm_nullstr; SCM_STRING_TO_U32_BUF (str, c_str); if (c_locale) RUN_IN_LOCALE_SECTION (c_locale, ret = u32_locale_tocase ((scm_t_uint32 *) c_str, len, &c_convstr, &convlen, func)); else ret = u32_locale_tocase ((scm_t_uint32 *) c_str, len, &c_convstr, &convlen, func); scm_remember_upto_here (str); if (SCM_UNLIKELY (ret != 0)) { *err = ret; return SCM_BOOL_F; } convstr = scm_i_make_wide_string (convlen, &c_buf, 0); memcpy (c_buf, c_convstr, convlen * sizeof (scm_t_wchar)); free (c_convstr); scm_i_try_narrow_string (convstr); return convstr; } #undef FUNC_NAME SCM_DEFINE (scm_string_locale_upcase, "string-locale-upcase", 1, 1, 0, (SCM str, SCM locale), "Return a new string that is the uppercase version of " "@var{str} according to either @var{locale} or the current " "locale.") #define FUNC_NAME s_scm_string_locale_upcase { scm_t_locale c_locale; SCM ret; int err = 0; SCM_VALIDATE_STRING (1, str); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (2, locale, c_locale); ret = str_to_case (str, c_locale, u32_toupper, FUNC_NAME, &err); if (err != 0) { errno = err; scm_syserror (FUNC_NAME); } return ret; } #undef FUNC_NAME SCM_DEFINE (scm_string_locale_downcase, "string-locale-downcase", 1, 1, 0, (SCM str, SCM locale), "Return a new string that is the down-case version of " "@var{str} according to either @var{locale} or the current " "locale.") #define FUNC_NAME s_scm_string_locale_downcase { scm_t_locale c_locale; SCM ret; int err = 0; SCM_VALIDATE_STRING (1, str); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (2, locale, c_locale); ret = str_to_case (str, c_locale, u32_tolower, FUNC_NAME, &err); if (err != 0) { errno = err; scm_syserror (FUNC_NAME); } return ret; } #undef FUNC_NAME SCM_DEFINE (scm_string_locale_titlecase, "string-locale-titlecase", 1, 1, 0, (SCM str, SCM locale), "Return a new string that is the title-case version of " "@var{str} according to either @var{locale} or the current " "locale.") #define FUNC_NAME s_scm_string_locale_titlecase { scm_t_locale c_locale; SCM ret; int err = 0; SCM_VALIDATE_STRING (1, str); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (2, locale, c_locale); ret = str_to_case (str, c_locale, u32_totitle, FUNC_NAME, &err); if (err != 0) { errno = err; scm_syserror (FUNC_NAME); } return ret; } #undef FUNC_NAME /* Note: We don't provide mutative versions of `string-locale-(up|down)case' because, in some languages, a single downcase character maps to a couple of uppercase characters. Read the SRFI-13 document for a detailed discussion about this. */ /* Locale-dependent number parsing. */ SCM_DEFINE (scm_locale_string_to_integer, "locale-string->integer", 1, 2, 0, (SCM str, SCM base, SCM locale), "Convert string @var{str} into an integer according to either " "@var{locale} (a locale object as returned by @code{make-locale}) " "or the current process locale. Return two values: an integer " "(on success) or @code{#f}, and the number of characters read " "from @var{str} (@code{0} on failure).") #define FUNC_NAME s_scm_locale_string_to_integer { SCM result; long c_result; int c_base; const char *c_str; char *c_endptr; scm_t_locale c_locale; SCM_VALIDATE_STRING (1, str); c_str = scm_i_string_chars (str); if (!scm_is_eq (base, SCM_UNDEFINED)) SCM_VALIDATE_INT_COPY (2, base, c_base); else c_base = 10; SCM_VALIDATE_OPTIONAL_LOCALE_COPY (3, locale, c_locale); if (c_locale != NULL) { #if defined USE_GNU_LOCALE_API && defined HAVE_STRTOL_L c_result = strtol_l (c_str, &c_endptr, c_base, c_locale); #else RUN_IN_LOCALE_SECTION (c_locale, c_result = strtol (c_str, &c_endptr, c_base)); #endif } else c_result = strtol (c_str, &c_endptr, c_base); scm_remember_upto_here (str); if (c_endptr == c_str) result = SCM_BOOL_F; else result = scm_from_long (c_result); return (scm_values (scm_list_2 (result, scm_from_long (c_endptr - c_str)))); } #undef FUNC_NAME SCM_DEFINE (scm_locale_string_to_inexact, "locale-string->inexact", 1, 1, 0, (SCM str, SCM locale), "Convert string @var{str} into an inexact number according to " "either @var{locale} (a locale object as returned by " "@code{make-locale}) or the current process locale. Return " "two values: an inexact number (on success) or @code{#f}, and " "the number of characters read from @var{str} (@code{0} on " "failure).") #define FUNC_NAME s_scm_locale_string_to_inexact { SCM result; double c_result; const char *c_str; char *c_endptr; scm_t_locale c_locale; SCM_VALIDATE_STRING (1, str); c_str = scm_i_string_chars (str); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (2, locale, c_locale); if (c_locale != NULL) { #if defined USE_GNU_LOCALE_API && defined HAVE_STRTOD_L c_result = strtod_l (c_str, &c_endptr, c_locale); #else RUN_IN_LOCALE_SECTION (c_locale, c_result = strtod (c_str, &c_endptr)); #endif } else c_result = strtod (c_str, &c_endptr); scm_remember_upto_here (str); if (c_endptr == c_str) result = SCM_BOOL_F; else result = scm_from_double (c_result); return (scm_values (scm_list_2 (result, scm_from_long (c_endptr - c_str)))); } #undef FUNC_NAME /* Language information, aka. `nl_langinfo ()'. */ /* FIXME: Issues related to `nl-langinfo'. 1. The `CODESET' value is not normalized. This is a secondary issue, but still a practical issue. See http://www.cl.cam.ac.uk/~mgk25/ucs/norm_charmap.c for codeset normalization. 2. `nl_langinfo ()' is not available on Windows. 3. `nl_langinfo ()' may return strings encoded in a locale different from the current one. For example: (nl-langinfo DAY_1 (make-locale LC_ALL "eo_EO.UTF-8")) returns a result that is a UTF-8 string, regardless of the setting of the current locale. If nl_langinfo supports CODESET, we can convert the string properly using scm_from_stringn. If CODESET is not supported, we won't be able to make much sense of the returned string. Note: We don't use Gnulib's `nl_langinfo' module because it's currently not as complete as the compatibility hacks in `i18n.scm'. */ static char * copy_string_or_null (const char *s) { if (s == NULL) return NULL; else return strdup (s); } SCM_DEFINE (scm_nl_langinfo, "nl-langinfo", 1, 1, 0, (SCM item, SCM locale), "Return a string denoting locale information for @var{item} " "in the current locale or that specified by @var{locale}. " "The semantics and arguments are the same as those of the " "X/Open @code{nl_langinfo} function (@pxref{The Elegant and " "Fast Way, @code{nl_langinfo},, libc, The GNU C Library " "Reference Manual}).") #define FUNC_NAME s_scm_nl_langinfo { SCM result; nl_item c_item; char *c_result; scm_t_locale c_locale; char *codeset; SCM_VALIDATE_INT_COPY (2, item, c_item); SCM_VALIDATE_OPTIONAL_LOCALE_COPY (2, locale, c_locale); /* Sadly, `nl_langinfo ()' returns a pointer to a static string. According to SuS v2, that static string may be modified by subsequent calls to `nl_langinfo ()' as well as by calls to `setlocale ()'. Thus, we must acquire the locale mutex before doing invoking `nl_langinfo ()'. See http://opengroup.org/onlinepubs/007908799/xsh/nl_langinfo.html for details. */ lock_locale_mutex (); if (c_locale != NULL) { #ifdef USE_GNU_LOCALE_API c_result = copy_string_or_null (nl_langinfo_l (c_item, c_locale)); codeset = copy_string_or_null (nl_langinfo_l (CODESET, c_locale)); #else /* !USE_GNU_LOCALE_API */ /* We can't use `RUN_IN_LOCALE_SECTION ()' here because the locale mutex is already taken. */ int lsec_err; scm_t_locale_settings lsec_prev_locale; lsec_err = get_current_locale_settings (&lsec_prev_locale); if (lsec_err) unlock_locale_mutex (); else { lsec_err = install_locale (c_locale); if (lsec_err) { leave_locale_section (&lsec_prev_locale); free_locale_settings (&lsec_prev_locale); } } if (lsec_err) scm_locale_error (FUNC_NAME, lsec_err); else { c_result = copy_string_or_null (nl_langinfo (c_item)); codeset = copy_string_or_null (nl_langinfo (CODESET)); restore_locale_settings (&lsec_prev_locale); free_locale_settings (&lsec_prev_locale); } #endif } else { c_result = copy_string_or_null (nl_langinfo (c_item)); codeset = copy_string_or_null (nl_langinfo (CODESET)); } unlock_locale_mutex (); if (c_result == NULL) result = SCM_BOOL_F; else { switch (c_item) { #if (defined GROUPING) && (defined MON_GROUPING) case GROUPING: case MON_GROUPING: { char *p; /* In this cases, the result is to be interpreted as a list of numbers. If the last item is `CHAR_MAX' or a negative number, it has the special meaning "no more grouping" (negative numbers aren't specified in POSIX but can be used by glibc; see ). */ result = SCM_EOL; for (p = c_result; (*p > 0) && (*p != CHAR_MAX); p++) result = scm_cons (SCM_I_MAKINUM ((int) *p), result); { SCM last_pair = result; result = scm_reverse_x (result, SCM_EOL); if (*p == 0) { /* Cyclic grouping information. */ if (!scm_is_null (last_pair)) SCM_SETCDR (last_pair, result); } } free (c_result); break; } #endif #if defined FRAC_DIGITS || defined INT_FRAC_DIGITS #ifdef FRAC_DIGITS case FRAC_DIGITS: #endif #ifdef INT_FRAC_DIGITS case INT_FRAC_DIGITS: #endif /* This is to be interpreted as a single integer. */ if (*c_result == CHAR_MAX) /* Unspecified. */ result = SCM_BOOL_F; else result = SCM_I_MAKINUM (*c_result); free (c_result); break; #endif #if defined P_CS_PRECEDES || defined N_CS_PRECEDES || \ defined INT_P_CS_PRECEDES || defined INT_N_CS_PRECEDES || \ defined P_SEP_BY_SPACE || defined N_SEP_BY_SPACE || \ defined INT_P_SEP_BY_SPACE || defined INT_N_SEP_BY_SPACE #ifdef P_CS_PRECEDES case P_CS_PRECEDES: case N_CS_PRECEDES: #endif #ifdef INT_N_CS_PRECEDES case INT_P_CS_PRECEDES: case INT_N_CS_PRECEDES: #endif #ifdef P_SEP_BY_SPACE case P_SEP_BY_SPACE: case N_SEP_BY_SPACE: #endif #ifdef INT_P_SEP_BY_SPACE case INT_P_SEP_BY_SPACE: case INT_N_SEP_BY_SPACE: #endif /* This is to be interpreted as a boolean. */ result = scm_from_bool (*c_result); free (c_result); break; #endif #if defined P_SIGN_POSN || defined N_SIGN_POSN || \ defined INT_P_SIGN_POSN || defined INT_N_SIGN_POSN #ifdef P_SIGN_POSN case P_SIGN_POSN: case N_SIGN_POSN: #endif #ifdef INT_P_SIGN_POSN case INT_P_SIGN_POSN: case INT_N_SIGN_POSN: #endif /* See `(libc) Sign of Money Amount' for the interpretation of the return value here. */ switch (*c_result) { case 0: result = scm_from_latin1_symbol ("parenthesize"); break; case 1: result = scm_from_latin1_symbol ("sign-before"); break; case 2: result = scm_from_latin1_symbol ("sign-after"); break; case 3: result = scm_from_latin1_symbol ("sign-before-currency-symbol"); break; case 4: result = scm_from_latin1_symbol ("sign-after-currency-symbol"); break; default: result = scm_from_latin1_symbol ("unspecified"); } free (c_result); break; #endif default: result = scm_from_stringn (c_result, strlen (c_result), codeset, SCM_FAILED_CONVERSION_QUESTION_MARK); free (c_result); } } if (codeset != NULL) free (codeset); return result; } #undef FUNC_NAME /* Define the `nl_item' constants. */ static inline void define_langinfo_items (void) { #define DEFINE_NLITEM_CONSTANT(_item) \ scm_c_define (# _item, scm_from_int (_item)) DEFINE_NLITEM_CONSTANT (CODESET); /* Abbreviated days of the week. */ DEFINE_NLITEM_CONSTANT (ABDAY_1); DEFINE_NLITEM_CONSTANT (ABDAY_2); DEFINE_NLITEM_CONSTANT (ABDAY_3); DEFINE_NLITEM_CONSTANT (ABDAY_4); DEFINE_NLITEM_CONSTANT (ABDAY_5); DEFINE_NLITEM_CONSTANT (ABDAY_6); DEFINE_NLITEM_CONSTANT (ABDAY_7); /* Long-named days of the week. */ DEFINE_NLITEM_CONSTANT (DAY_1); /* Sunday */ DEFINE_NLITEM_CONSTANT (DAY_2); /* Monday */ DEFINE_NLITEM_CONSTANT (DAY_3); /* Tuesday */ DEFINE_NLITEM_CONSTANT (DAY_4); /* Wednesday */ DEFINE_NLITEM_CONSTANT (DAY_5); /* Thursday */ DEFINE_NLITEM_CONSTANT (DAY_6); /* Friday */ DEFINE_NLITEM_CONSTANT (DAY_7); /* Saturday */ /* Abbreviated month names. */ DEFINE_NLITEM_CONSTANT (ABMON_1); /* Jan */ DEFINE_NLITEM_CONSTANT (ABMON_2); DEFINE_NLITEM_CONSTANT (ABMON_3); DEFINE_NLITEM_CONSTANT (ABMON_4); DEFINE_NLITEM_CONSTANT (ABMON_5); DEFINE_NLITEM_CONSTANT (ABMON_6); DEFINE_NLITEM_CONSTANT (ABMON_7); DEFINE_NLITEM_CONSTANT (ABMON_8); DEFINE_NLITEM_CONSTANT (ABMON_9); DEFINE_NLITEM_CONSTANT (ABMON_10); DEFINE_NLITEM_CONSTANT (ABMON_11); DEFINE_NLITEM_CONSTANT (ABMON_12); /* Long month names. */ DEFINE_NLITEM_CONSTANT (MON_1); /* January */ DEFINE_NLITEM_CONSTANT (MON_2); DEFINE_NLITEM_CONSTANT (MON_3); DEFINE_NLITEM_CONSTANT (MON_4); DEFINE_NLITEM_CONSTANT (MON_5); DEFINE_NLITEM_CONSTANT (MON_6); DEFINE_NLITEM_CONSTANT (MON_7); DEFINE_NLITEM_CONSTANT (MON_8); DEFINE_NLITEM_CONSTANT (MON_9); DEFINE_NLITEM_CONSTANT (MON_10); DEFINE_NLITEM_CONSTANT (MON_11); DEFINE_NLITEM_CONSTANT (MON_12); DEFINE_NLITEM_CONSTANT (AM_STR); /* Ante meridiem string. */ DEFINE_NLITEM_CONSTANT (PM_STR); /* Post meridiem string. */ DEFINE_NLITEM_CONSTANT (D_T_FMT); /* Date and time format for strftime. */ DEFINE_NLITEM_CONSTANT (D_FMT); /* Date format for strftime. */ DEFINE_NLITEM_CONSTANT (T_FMT); /* Time format for strftime. */ DEFINE_NLITEM_CONSTANT (T_FMT_AMPM);/* 12-hour time format for strftime. */ #ifdef ERA DEFINE_NLITEM_CONSTANT (ERA); /* Alternate era. */ #endif #ifdef ERA_D_FMT DEFINE_NLITEM_CONSTANT (ERA_D_FMT); /* Date in alternate era format. */ #endif #ifdef ERA_D_T_FMT DEFINE_NLITEM_CONSTANT (ERA_D_T_FMT); /* Date and time in alternate era format. */ #endif #ifdef ERA_T_FMT DEFINE_NLITEM_CONSTANT (ERA_T_FMT); /* Time in alternate era format. */ #endif #ifdef ALT_DIGITS DEFINE_NLITEM_CONSTANT (ALT_DIGITS); /* Alternate symbols for digits. */ #endif DEFINE_NLITEM_CONSTANT (RADIXCHAR); DEFINE_NLITEM_CONSTANT (THOUSEP); #ifdef YESEXPR DEFINE_NLITEM_CONSTANT (YESEXPR); #endif #ifdef NOEXPR DEFINE_NLITEM_CONSTANT (NOEXPR); #endif #ifdef CRNCYSTR /* currency symbol */ DEFINE_NLITEM_CONSTANT (CRNCYSTR); #endif /* GNU extensions. */ #ifdef ERA_YEAR DEFINE_NLITEM_CONSTANT (ERA_YEAR); /* Year in alternate era format. */ #endif /* LC_MONETARY category: formatting of monetary quantities. These items each correspond to a member of `struct lconv', defined in . */ #ifdef INT_CURR_SYMBOL DEFINE_NLITEM_CONSTANT (INT_CURR_SYMBOL); #endif #ifdef MON_DECIMAL_POINT DEFINE_NLITEM_CONSTANT (MON_DECIMAL_POINT); #endif #ifdef MON_THOUSANDS_SEP DEFINE_NLITEM_CONSTANT (MON_THOUSANDS_SEP); #endif #ifdef MON_GROUPING DEFINE_NLITEM_CONSTANT (MON_GROUPING); #endif #ifdef POSITIVE_SIGN DEFINE_NLITEM_CONSTANT (POSITIVE_SIGN); #endif #ifdef NEGATIVE_SIGN DEFINE_NLITEM_CONSTANT (NEGATIVE_SIGN); #endif #ifdef GROUPING DEFINE_NLITEM_CONSTANT (GROUPING); #endif #ifdef INT_FRAC_DIGITS DEFINE_NLITEM_CONSTANT (INT_FRAC_DIGITS); #endif #ifdef FRAC_DIGITS DEFINE_NLITEM_CONSTANT (FRAC_DIGITS); #endif #ifdef P_CS_PRECEDES DEFINE_NLITEM_CONSTANT (P_CS_PRECEDES); #endif #ifdef P_SEP_BY_SPACE DEFINE_NLITEM_CONSTANT (P_SEP_BY_SPACE); #endif #ifdef N_CS_PRECEDES DEFINE_NLITEM_CONSTANT (N_CS_PRECEDES); #endif #ifdef N_SEP_BY_SPACE DEFINE_NLITEM_CONSTANT (N_SEP_BY_SPACE); #endif #ifdef P_SIGN_POSN DEFINE_NLITEM_CONSTANT (P_SIGN_POSN); #endif #ifdef N_SIGN_POSN DEFINE_NLITEM_CONSTANT (N_SIGN_POSN); #endif #ifdef INT_P_CS_PRECEDES DEFINE_NLITEM_CONSTANT (INT_P_CS_PRECEDES); #endif #ifdef INT_P_SEP_BY_SPACE DEFINE_NLITEM_CONSTANT (INT_P_SEP_BY_SPACE); #endif #ifdef INT_N_CS_PRECEDES DEFINE_NLITEM_CONSTANT (INT_N_CS_PRECEDES); #endif #ifdef INT_N_SEP_BY_SPACE DEFINE_NLITEM_CONSTANT (INT_N_SEP_BY_SPACE); #endif #ifdef INT_P_SIGN_POSN DEFINE_NLITEM_CONSTANT (INT_P_SIGN_POSN); #endif #ifdef INT_N_SIGN_POSN DEFINE_NLITEM_CONSTANT (INT_N_SIGN_POSN); #endif #undef DEFINE_NLITEM_CONSTANT } void scm_init_i18n () { SCM global_locale_smob; scm_add_feature ("nl-langinfo"); define_langinfo_items (); #include "libguile/i18n.x" /* Initialize the global locale object with a special `locale' SMOB. */ /* XXX: We don't define it as `LC_GLOBAL_LOCALE' because of bugs as of glibc <= 2.11 not (yet) worked around by Gnulib. See http://sourceware.org/bugzilla/show_bug.cgi?id=11009 for details. */ SCM_NEWSMOB (global_locale_smob, scm_tc16_locale_smob_type, NULL); SCM_VARIABLE_SET (scm_global_locale, global_locale_smob); } void scm_bootstrap_i18n () { scm_c_register_extension ("libguile-" SCM_EFFECTIVE_VERSION, "scm_init_i18n", (scm_t_extension_init_func) scm_init_i18n, NULL); } /* Local Variables: c-file-style: "gnu" End: */