#include "utils/pg_locale.h"
#include "utils/syscache.h"
-#ifdef USE_ICU
-#include <unicode/ucnv.h>
-#include <unicode/ustring.h>
-#endif
-
#ifdef __GLIBC__
#include <gnu/libc-version.h>
#endif
#define MAX_L10N_DATA 80
+/* pg_locale_icu.c */
+#ifdef USE_ICU
+extern UCollator *pg_ucol_open(const char *loc_str);
+extern UCollator *make_icu_collator(const char *iculocstr,
+ const char *icurules);
+extern int strncoll_icu(const char *arg1, ssize_t len1,
+ const char *arg2, ssize_t len2,
+ pg_locale_t locale);
+extern size_t strnxfrm_icu(char *dest, size_t destsize,
+ const char *src, ssize_t srclen,
+ pg_locale_t locale);
+extern size_t strnxfrm_prefix_icu(char *dest, size_t destsize,
+ const char *src, ssize_t srclen,
+ pg_locale_t locale);
+#endif
/* GUC settings */
char *locale_messages;
static char *IsoLocaleName(const char *);
#endif
-#ifdef USE_ICU
-/*
- * Converter object for converting between ICU's UChar strings and C strings
- * in database encoding. Since the database encoding doesn't change, we only
- * need one of these per session.
- */
-static UConverter *icu_converter = NULL;
-
-static UCollator *pg_ucol_open(const char *loc_str);
-static void init_icu_converter(void);
-static size_t uchar_length(UConverter *converter,
- const char *str, int32_t len);
-static int32_t uchar_convert(UConverter *converter,
- UChar *dest, int32_t destlen,
- const char *src, int32_t srclen);
-static void icu_set_collation_attributes(UCollator *collator, const char *loc,
- UErrorCode *status);
-#endif
-
/*
* POSIX doesn't define _l-variants of these functions, but several systems
* have them. We provide our own replacements here.
return loc;
}
-/*
- * Create a UCollator with the given locale string and rules.
- *
- * Ensure that no path leaks a UCollator.
- */
-#ifdef USE_ICU
-static UCollator *
-make_icu_collator(const char *iculocstr, const char *icurules)
-{
- if (!icurules)
- {
- /* simple case without rules */
- return pg_ucol_open(iculocstr);
- }
- else
- {
- UCollator *collator_std_rules;
- UCollator *collator_all_rules;
- const UChar *std_rules;
- UChar *my_rules;
- UChar *all_rules;
- int32_t length;
- int32_t total;
- UErrorCode status;
-
- /*
- * If rules are specified, we extract the rules of the standard
- * collation, add our own rules, and make a new collator with the
- * combined rules.
- */
- icu_to_uchar(&my_rules, icurules, strlen(icurules));
-
- collator_std_rules = pg_ucol_open(iculocstr);
-
- std_rules = ucol_getRules(collator_std_rules, &length);
-
- total = u_strlen(std_rules) + u_strlen(my_rules) + 1;
-
- /* avoid leaking collator on OOM */
- all_rules = palloc_extended(sizeof(UChar) * total, MCXT_ALLOC_NO_OOM);
- if (!all_rules)
- {
- ucol_close(collator_std_rules);
- ereport(ERROR,
- (errcode(ERRCODE_OUT_OF_MEMORY),
- errmsg("out of memory")));
- }
-
- u_strcpy(all_rules, std_rules);
- u_strcat(all_rules, my_rules);
-
- ucol_close(collator_std_rules);
-
- status = U_ZERO_ERROR;
- collator_all_rules = ucol_openRules(all_rules, u_strlen(all_rules),
- UCOL_DEFAULT, UCOL_DEFAULT_STRENGTH,
- NULL, &status);
- if (U_FAILURE(status))
- {
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("could not open collator for locale \"%s\" with rules \"%s\": %s",
- iculocstr, icurules, u_errorName(status))));
- }
-
- return collator_all_rules;
- }
-}
-#endif /* not USE_ICU */
-
/*
* Initialize default_locale with database locale settings.
*/
return result;
}
-#ifdef USE_ICU
-
-/*
- * strncoll_icu_no_utf8
- *
- * Convert the arguments from the database encoding to UChar strings, then
- * call ucol_strcoll(). An argument length of -1 means that the string is
- * NUL-terminated.
- *
- * When the database encoding is UTF-8, and ICU supports ucol_strcollUTF8(),
- * caller should call that instead.
- */
-static int
-strncoll_icu_no_utf8(const char *arg1, ssize_t len1,
- const char *arg2, ssize_t len2, pg_locale_t locale)
-{
- char sbuf[TEXTBUFLEN];
- char *buf = sbuf;
- int32_t ulen1;
- int32_t ulen2;
- size_t bufsize1;
- size_t bufsize2;
- UChar *uchar1,
- *uchar2;
- int result;
-
- Assert(locale->provider == COLLPROVIDER_ICU);
-#ifdef HAVE_UCOL_STRCOLLUTF8
- Assert(GetDatabaseEncoding() != PG_UTF8);
-#endif
-
- init_icu_converter();
-
- ulen1 = uchar_length(icu_converter, arg1, len1);
- ulen2 = uchar_length(icu_converter, arg2, len2);
-
- bufsize1 = (ulen1 + 1) * sizeof(UChar);
- bufsize2 = (ulen2 + 1) * sizeof(UChar);
-
- if (bufsize1 + bufsize2 > TEXTBUFLEN)
- buf = palloc(bufsize1 + bufsize2);
-
- uchar1 = (UChar *) buf;
- uchar2 = (UChar *) (buf + bufsize1);
-
- ulen1 = uchar_convert(icu_converter, uchar1, ulen1 + 1, arg1, len1);
- ulen2 = uchar_convert(icu_converter, uchar2, ulen2 + 1, arg2, len2);
-
- result = ucol_strcoll(locale->info.icu.ucol,
- uchar1, ulen1,
- uchar2, ulen2);
-
- if (buf != sbuf)
- pfree(buf);
-
- return result;
-}
-
-/*
- * strncoll_icu
- *
- * Call ucol_strcollUTF8() or ucol_strcoll() as appropriate for the given
- * database encoding. An argument length of -1 means the string is
- * NUL-terminated.
- */
-static int
-strncoll_icu(const char *arg1, ssize_t len1, const char *arg2, ssize_t len2,
- pg_locale_t locale)
-{
- int result;
-
- Assert(locale->provider == COLLPROVIDER_ICU);
-
-#ifdef HAVE_UCOL_STRCOLLUTF8
- if (GetDatabaseEncoding() == PG_UTF8)
- {
- UErrorCode status;
-
- status = U_ZERO_ERROR;
- result = ucol_strcollUTF8(locale->info.icu.ucol,
- arg1, len1,
- arg2, len2,
- &status);
- if (U_FAILURE(status))
- ereport(ERROR,
- (errmsg("collation failed: %s", u_errorName(status))));
- }
- else
-#endif
- {
- result = strncoll_icu_no_utf8(arg1, len1, arg2, len2, locale);
- }
-
- return result;
-}
-
-#endif /* USE_ICU */
-
/*
* pg_strcoll
*
return result;
}
-#ifdef USE_ICU
-
-/* 'srclen' of -1 means the strings are NUL-terminated */
-static size_t
-strnxfrm_icu(char *dest, size_t destsize, const char *src, ssize_t srclen,
- pg_locale_t locale)
-{
- char sbuf[TEXTBUFLEN];
- char *buf = sbuf;
- UChar *uchar;
- int32_t ulen;
- size_t uchar_bsize;
- Size result_bsize;
-
- Assert(locale->provider == COLLPROVIDER_ICU);
-
- init_icu_converter();
-
- ulen = uchar_length(icu_converter, src, srclen);
-
- uchar_bsize = (ulen + 1) * sizeof(UChar);
-
- if (uchar_bsize > TEXTBUFLEN)
- buf = palloc(uchar_bsize);
-
- uchar = (UChar *) buf;
-
- ulen = uchar_convert(icu_converter, uchar, ulen + 1, src, srclen);
-
- result_bsize = ucol_getSortKey(locale->info.icu.ucol,
- uchar, ulen,
- (uint8_t *) dest, destsize);
-
- /*
- * ucol_getSortKey() counts the nul-terminator in the result length, but
- * this function should not.
- */
- Assert(result_bsize > 0);
- result_bsize--;
-
- if (buf != sbuf)
- pfree(buf);
-
- /* if dest is defined, it should be nul-terminated */
- Assert(result_bsize >= destsize || dest[result_bsize] == '\0');
-
- return result_bsize;
-}
-
-/* 'srclen' of -1 means the strings are NUL-terminated */
-static size_t
-strnxfrm_prefix_icu_no_utf8(char *dest, size_t destsize,
- const char *src, ssize_t srclen,
- pg_locale_t locale)
-{
- char sbuf[TEXTBUFLEN];
- char *buf = sbuf;
- UCharIterator iter;
- uint32_t state[2];
- UErrorCode status;
- int32_t ulen = -1;
- UChar *uchar = NULL;
- size_t uchar_bsize;
- Size result_bsize;
-
- Assert(locale->provider == COLLPROVIDER_ICU);
- Assert(GetDatabaseEncoding() != PG_UTF8);
-
- init_icu_converter();
-
- ulen = uchar_length(icu_converter, src, srclen);
-
- uchar_bsize = (ulen + 1) * sizeof(UChar);
-
- if (uchar_bsize > TEXTBUFLEN)
- buf = palloc(uchar_bsize);
-
- uchar = (UChar *) buf;
-
- ulen = uchar_convert(icu_converter, uchar, ulen + 1, src, srclen);
-
- uiter_setString(&iter, uchar, ulen);
- state[0] = state[1] = 0; /* won't need that again */
- status = U_ZERO_ERROR;
- result_bsize = ucol_nextSortKeyPart(locale->info.icu.ucol,
- &iter,
- state,
- (uint8_t *) dest,
- destsize,
- &status);
- if (U_FAILURE(status))
- ereport(ERROR,
- (errmsg("sort key generation failed: %s",
- u_errorName(status))));
-
- return result_bsize;
-}
-
-/* 'srclen' of -1 means the strings are NUL-terminated */
-static size_t
-strnxfrm_prefix_icu(char *dest, size_t destsize,
- const char *src, ssize_t srclen,
- pg_locale_t locale)
-{
- size_t result;
-
- Assert(locale->provider == COLLPROVIDER_ICU);
-
- if (GetDatabaseEncoding() == PG_UTF8)
- {
- UCharIterator iter;
- uint32_t state[2];
- UErrorCode status;
-
- uiter_setUTF8(&iter, src, srclen);
- state[0] = state[1] = 0; /* won't need that again */
- status = U_ZERO_ERROR;
- result = ucol_nextSortKeyPart(locale->info.icu.ucol,
- &iter,
- state,
- (uint8_t *) dest,
- destsize,
- &status);
- if (U_FAILURE(status))
- ereport(ERROR,
- (errmsg("sort key generation failed: %s",
- u_errorName(status))));
- }
- else
- result = strnxfrm_prefix_icu_no_utf8(dest, destsize, src, srclen,
- locale);
-
- return result;
-}
-
-#endif
-
/*
* Return true if the collation provider supports pg_strxfrm() and
* pg_strnxfrm(); otherwise false.
}
-#ifdef USE_ICU
-
-/*
- * Wrapper around ucol_open() to handle API differences for older ICU
- * versions.
- *
- * Ensure that no path leaks a UCollator.
- */
-static UCollator *
-pg_ucol_open(const char *loc_str)
-{
- UCollator *collator;
- UErrorCode status;
- const char *orig_str = loc_str;
- char *fixed_str = NULL;
-
- /*
- * Must never open default collator, because it depends on the environment
- * and may change at any time. Should not happen, but check here to catch
- * bugs that might be hard to catch otherwise.
- *
- * NB: the default collator is not the same as the collator for the root
- * locale. The root locale may be specified as the empty string, "und", or
- * "root". The default collator is opened by passing NULL to ucol_open().
- */
- if (loc_str == NULL)
- elog(ERROR, "opening default collator is not supported");
-
- /*
- * In ICU versions 54 and earlier, "und" is not a recognized spelling of
- * the root locale. If the first component of the locale is "und", replace
- * with "root" before opening.
- */
- if (U_ICU_VERSION_MAJOR_NUM < 55)
- {
- char lang[ULOC_LANG_CAPACITY];
-
- status = U_ZERO_ERROR;
- uloc_getLanguage(loc_str, lang, ULOC_LANG_CAPACITY, &status);
- if (U_FAILURE(status) || status == U_STRING_NOT_TERMINATED_WARNING)
- {
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("could not get language from locale \"%s\": %s",
- loc_str, u_errorName(status))));
- }
-
- if (strcmp(lang, "und") == 0)
- {
- const char *remainder = loc_str + strlen("und");
-
- fixed_str = palloc(strlen("root") + strlen(remainder) + 1);
- strcpy(fixed_str, "root");
- strcat(fixed_str, remainder);
-
- loc_str = fixed_str;
- }
- }
-
- status = U_ZERO_ERROR;
- collator = ucol_open(loc_str, &status);
- if (U_FAILURE(status))
- ereport(ERROR,
- /* use original string for error report */
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("could not open collator for locale \"%s\": %s",
- orig_str, u_errorName(status))));
-
- if (U_ICU_VERSION_MAJOR_NUM < 54)
- {
- status = U_ZERO_ERROR;
- icu_set_collation_attributes(collator, loc_str, &status);
-
- /*
- * Pretend the error came from ucol_open(), for consistent error
- * message across ICU versions.
- */
- if (U_FAILURE(status) || status == U_STRING_NOT_TERMINATED_WARNING)
- {
- ucol_close(collator);
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
- errmsg("could not open collator for locale \"%s\": %s",
- orig_str, u_errorName(status))));
- }
- }
-
- if (fixed_str != NULL)
- pfree(fixed_str);
-
- return collator;
-}
-
-static void
-init_icu_converter(void)
-{
- const char *icu_encoding_name;
- UErrorCode status;
- UConverter *conv;
-
- if (icu_converter)
- return; /* already done */
-
- icu_encoding_name = get_encoding_name_for_icu(GetDatabaseEncoding());
- if (!icu_encoding_name)
- ereport(ERROR,
- (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
- errmsg("encoding \"%s\" not supported by ICU",
- pg_encoding_to_char(GetDatabaseEncoding()))));
-
- status = U_ZERO_ERROR;
- conv = ucnv_open(icu_encoding_name, &status);
- if (U_FAILURE(status))
- ereport(ERROR,
- (errmsg("could not open ICU converter for encoding \"%s\": %s",
- icu_encoding_name, u_errorName(status))));
-
- icu_converter = conv;
-}
-
-/*
- * Find length, in UChars, of given string if converted to UChar string.
- *
- * A length of -1 indicates that the input string is NUL-terminated.
- */
-static size_t
-uchar_length(UConverter *converter, const char *str, int32_t len)
-{
- UErrorCode status = U_ZERO_ERROR;
- int32_t ulen;
-
- ulen = ucnv_toUChars(converter, NULL, 0, str, len, &status);
- if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
- ereport(ERROR,
- (errmsg("%s failed: %s", "ucnv_toUChars", u_errorName(status))));
- return ulen;
-}
-
-/*
- * Convert the given source string into a UChar string, stored in dest, and
- * return the length (in UChars).
- *
- * A srclen of -1 indicates that the input string is NUL-terminated.
- */
-static int32_t
-uchar_convert(UConverter *converter, UChar *dest, int32_t destlen,
- const char *src, int32_t srclen)
-{
- UErrorCode status = U_ZERO_ERROR;
- int32_t ulen;
-
- status = U_ZERO_ERROR;
- ulen = ucnv_toUChars(converter, dest, destlen, src, srclen, &status);
- if (U_FAILURE(status))
- ereport(ERROR,
- (errmsg("%s failed: %s", "ucnv_toUChars", u_errorName(status))));
- return ulen;
-}
-
-/*
- * Convert a string in the database encoding into a string of UChars.
- *
- * The source string at buff is of length nbytes
- * (it needn't be nul-terminated)
- *
- * *buff_uchar receives a pointer to the palloc'd result string, and
- * the function's result is the number of UChars generated.
- *
- * The result string is nul-terminated, though most callers rely on the
- * result length instead.
- */
-int32_t
-icu_to_uchar(UChar **buff_uchar, const char *buff, size_t nbytes)
-{
- int32_t len_uchar;
-
- init_icu_converter();
-
- len_uchar = uchar_length(icu_converter, buff, nbytes);
-
- *buff_uchar = palloc((len_uchar + 1) * sizeof(**buff_uchar));
- len_uchar = uchar_convert(icu_converter,
- *buff_uchar, len_uchar + 1, buff, nbytes);
-
- return len_uchar;
-}
-
-/*
- * Convert a string of UChars into the database encoding.
- *
- * The source string at buff_uchar is of length len_uchar
- * (it needn't be nul-terminated)
- *
- * *result receives a pointer to the palloc'd result string, and the
- * function's result is the number of bytes generated (not counting nul).
- *
- * The result string is nul-terminated.
- */
-int32_t
-icu_from_uchar(char **result, const UChar *buff_uchar, int32_t len_uchar)
-{
- UErrorCode status;
- int32_t len_result;
-
- init_icu_converter();
-
- status = U_ZERO_ERROR;
- len_result = ucnv_fromUChars(icu_converter, NULL, 0,
- buff_uchar, len_uchar, &status);
- if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
- ereport(ERROR,
- (errmsg("%s failed: %s", "ucnv_fromUChars",
- u_errorName(status))));
-
- *result = palloc(len_result + 1);
-
- status = U_ZERO_ERROR;
- len_result = ucnv_fromUChars(icu_converter, *result, len_result + 1,
- buff_uchar, len_uchar, &status);
- if (U_FAILURE(status) ||
- status == U_STRING_NOT_TERMINATED_WARNING)
- ereport(ERROR,
- (errmsg("%s failed: %s", "ucnv_fromUChars",
- u_errorName(status))));
-
- return len_result;
-}
-
-/*
- * Parse collation attributes from the given locale string and apply them to
- * the open collator.
- *
- * First, the locale string is canonicalized to an ICU format locale ID such
- * as "und@colStrength=primary;colCaseLevel=yes". Then, it parses and applies
- * the key-value arguments.
- *
- * Starting with ICU version 54, the attributes are processed automatically by
- * ucol_open(), so this is only necessary for emulating this behavior on older
- * versions.
- */
-pg_attribute_unused()
-static void
-icu_set_collation_attributes(UCollator *collator, const char *loc,
- UErrorCode *status)
-{
- int32_t len;
- char *icu_locale_id;
- char *lower_str;
- char *str;
- char *token;
-
- /*
- * The input locale may be a BCP 47 language tag, e.g.
- * "und-u-kc-ks-level1", which expresses the same attributes in a
- * different form. It will be converted to the equivalent ICU format
- * locale ID, e.g. "und@colcaselevel=yes;colstrength=primary", by
- * uloc_canonicalize().
- */
- *status = U_ZERO_ERROR;
- len = uloc_canonicalize(loc, NULL, 0, status);
- icu_locale_id = palloc(len + 1);
- *status = U_ZERO_ERROR;
- len = uloc_canonicalize(loc, icu_locale_id, len + 1, status);
- if (U_FAILURE(*status) || *status == U_STRING_NOT_TERMINATED_WARNING)
- return;
-
- lower_str = asc_tolower(icu_locale_id, strlen(icu_locale_id));
-
- pfree(icu_locale_id);
-
- str = strchr(lower_str, '@');
- if (!str)
- return;
- str++;
-
- while ((token = strsep(&str, ";")))
- {
- char *e = strchr(token, '=');
-
- if (e)
- {
- char *name;
- char *value;
- UColAttribute uattr;
- UColAttributeValue uvalue;
-
- *status = U_ZERO_ERROR;
-
- *e = '\0';
- name = token;
- value = e + 1;
-
- /*
- * See attribute name and value lists in ICU i18n/coll.cpp
- */
- if (strcmp(name, "colstrength") == 0)
- uattr = UCOL_STRENGTH;
- else if (strcmp(name, "colbackwards") == 0)
- uattr = UCOL_FRENCH_COLLATION;
- else if (strcmp(name, "colcaselevel") == 0)
- uattr = UCOL_CASE_LEVEL;
- else if (strcmp(name, "colcasefirst") == 0)
- uattr = UCOL_CASE_FIRST;
- else if (strcmp(name, "colalternate") == 0)
- uattr = UCOL_ALTERNATE_HANDLING;
- else if (strcmp(name, "colnormalization") == 0)
- uattr = UCOL_NORMALIZATION_MODE;
- else if (strcmp(name, "colnumeric") == 0)
- uattr = UCOL_NUMERIC_COLLATION;
- else
- /* ignore if unknown */
- continue;
-
- if (strcmp(value, "primary") == 0)
- uvalue = UCOL_PRIMARY;
- else if (strcmp(value, "secondary") == 0)
- uvalue = UCOL_SECONDARY;
- else if (strcmp(value, "tertiary") == 0)
- uvalue = UCOL_TERTIARY;
- else if (strcmp(value, "quaternary") == 0)
- uvalue = UCOL_QUATERNARY;
- else if (strcmp(value, "identical") == 0)
- uvalue = UCOL_IDENTICAL;
- else if (strcmp(value, "no") == 0)
- uvalue = UCOL_OFF;
- else if (strcmp(value, "yes") == 0)
- uvalue = UCOL_ON;
- else if (strcmp(value, "shifted") == 0)
- uvalue = UCOL_SHIFTED;
- else if (strcmp(value, "non-ignorable") == 0)
- uvalue = UCOL_NON_IGNORABLE;
- else if (strcmp(value, "lower") == 0)
- uvalue = UCOL_LOWER_FIRST;
- else if (strcmp(value, "upper") == 0)
- uvalue = UCOL_UPPER_FIRST;
- else
- {
- *status = U_ILLEGAL_ARGUMENT_ERROR;
- break;
- }
-
- ucol_setAttribute(collator, uattr, uvalue, status);
- }
- }
-
- pfree(lower_str);
-}
-#endif
/*
* Return the BCP47 language tag representation of the requested locale.
--- /dev/null
+/*-----------------------------------------------------------------------
+ *
+ * PostgreSQL locale utilities for ICU
+ *
+ * Portions Copyright (c) 2002-2024, PostgreSQL Global Development Group
+ *
+ * src/backend/utils/adt/pg_locale_icu.c
+ *
+ *-----------------------------------------------------------------------
+ */
+
+#include "postgres.h"
+
+#ifdef USE_ICU
+
+#include <unicode/ucnv.h>
+#include <unicode/ustring.h>
+
+#include "catalog/pg_collation.h"
+#include "mb/pg_wchar.h"
+#include "utils/formatting.h"
+#include "utils/pg_locale.h"
+
+/*
+ * Size of stack buffer to use for string transformations, used to avoid heap
+ * allocations in typical cases. This should be large enough that most strings
+ * will fit, but small enough that we feel comfortable putting it on the
+ * stack.
+ */
+#define TEXTBUFLEN 1024
+
+extern UCollator *pg_ucol_open(const char *loc_str);
+extern UCollator *make_icu_collator(const char *iculocstr,
+ const char *icurules);
+extern int strncoll_icu(const char *arg1, ssize_t len1,
+ const char *arg2, ssize_t len2,
+ pg_locale_t locale);
+extern size_t strnxfrm_icu(char *dest, size_t destsize,
+ const char *src, ssize_t srclen,
+ pg_locale_t locale);
+extern size_t strnxfrm_prefix_icu(char *dest, size_t destsize,
+ const char *src, ssize_t srclen,
+ pg_locale_t locale);
+
+/*
+ * Converter object for converting between ICU's UChar strings and C strings
+ * in database encoding. Since the database encoding doesn't change, we only
+ * need one of these per session.
+ */
+static UConverter *icu_converter = NULL;
+
+static int strncoll_icu_no_utf8(const char *arg1, ssize_t len1,
+ const char *arg2, ssize_t len2,
+ pg_locale_t locale);
+static size_t strnxfrm_prefix_icu_no_utf8(char *dest, size_t destsize,
+ const char *src, ssize_t srclen,
+ pg_locale_t locale);
+static void init_icu_converter(void);
+static size_t uchar_length(UConverter *converter,
+ const char *str, int32_t len);
+static int32_t uchar_convert(UConverter *converter,
+ UChar *dest, int32_t destlen,
+ const char *src, int32_t srclen);
+static void icu_set_collation_attributes(UCollator *collator, const char *loc,
+ UErrorCode *status);
+
+/*
+ * Wrapper around ucol_open() to handle API differences for older ICU
+ * versions.
+ *
+ * Ensure that no path leaks a UCollator.
+ */
+UCollator *
+pg_ucol_open(const char *loc_str)
+{
+ UCollator *collator;
+ UErrorCode status;
+ const char *orig_str = loc_str;
+ char *fixed_str = NULL;
+
+ /*
+ * Must never open default collator, because it depends on the environment
+ * and may change at any time. Should not happen, but check here to catch
+ * bugs that might be hard to catch otherwise.
+ *
+ * NB: the default collator is not the same as the collator for the root
+ * locale. The root locale may be specified as the empty string, "und", or
+ * "root". The default collator is opened by passing NULL to ucol_open().
+ */
+ if (loc_str == NULL)
+ elog(ERROR, "opening default collator is not supported");
+
+ /*
+ * In ICU versions 54 and earlier, "und" is not a recognized spelling of
+ * the root locale. If the first component of the locale is "und", replace
+ * with "root" before opening.
+ */
+ if (U_ICU_VERSION_MAJOR_NUM < 55)
+ {
+ char lang[ULOC_LANG_CAPACITY];
+
+ status = U_ZERO_ERROR;
+ uloc_getLanguage(loc_str, lang, ULOC_LANG_CAPACITY, &status);
+ if (U_FAILURE(status) || status == U_STRING_NOT_TERMINATED_WARNING)
+ {
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("could not get language from locale \"%s\": %s",
+ loc_str, u_errorName(status))));
+ }
+
+ if (strcmp(lang, "und") == 0)
+ {
+ const char *remainder = loc_str + strlen("und");
+
+ fixed_str = palloc(strlen("root") + strlen(remainder) + 1);
+ strcpy(fixed_str, "root");
+ strcat(fixed_str, remainder);
+
+ loc_str = fixed_str;
+ }
+ }
+
+ status = U_ZERO_ERROR;
+ collator = ucol_open(loc_str, &status);
+ if (U_FAILURE(status))
+ ereport(ERROR,
+ /* use original string for error report */
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("could not open collator for locale \"%s\": %s",
+ orig_str, u_errorName(status))));
+
+ if (U_ICU_VERSION_MAJOR_NUM < 54)
+ {
+ status = U_ZERO_ERROR;
+ icu_set_collation_attributes(collator, loc_str, &status);
+
+ /*
+ * Pretend the error came from ucol_open(), for consistent error
+ * message across ICU versions.
+ */
+ if (U_FAILURE(status) || status == U_STRING_NOT_TERMINATED_WARNING)
+ {
+ ucol_close(collator);
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("could not open collator for locale \"%s\": %s",
+ orig_str, u_errorName(status))));
+ }
+ }
+
+ if (fixed_str != NULL)
+ pfree(fixed_str);
+
+ return collator;
+}
+
+/*
+ * Create a UCollator with the given locale string and rules.
+ *
+ * Ensure that no path leaks a UCollator.
+ */
+UCollator *
+make_icu_collator(const char *iculocstr, const char *icurules)
+{
+ if (!icurules)
+ {
+ /* simple case without rules */
+ return pg_ucol_open(iculocstr);
+ }
+ else
+ {
+ UCollator *collator_std_rules;
+ UCollator *collator_all_rules;
+ const UChar *std_rules;
+ UChar *my_rules;
+ UChar *all_rules;
+ int32_t length;
+ int32_t total;
+ UErrorCode status;
+
+ /*
+ * If rules are specified, we extract the rules of the standard
+ * collation, add our own rules, and make a new collator with the
+ * combined rules.
+ */
+ icu_to_uchar(&my_rules, icurules, strlen(icurules));
+
+ collator_std_rules = pg_ucol_open(iculocstr);
+
+ std_rules = ucol_getRules(collator_std_rules, &length);
+
+ total = u_strlen(std_rules) + u_strlen(my_rules) + 1;
+
+ /* avoid leaking collator on OOM */
+ all_rules = palloc_extended(sizeof(UChar) * total, MCXT_ALLOC_NO_OOM);
+ if (!all_rules)
+ {
+ ucol_close(collator_std_rules);
+ ereport(ERROR,
+ (errcode(ERRCODE_OUT_OF_MEMORY),
+ errmsg("out of memory")));
+ }
+
+ u_strcpy(all_rules, std_rules);
+ u_strcat(all_rules, my_rules);
+
+ ucol_close(collator_std_rules);
+
+ status = U_ZERO_ERROR;
+ collator_all_rules = ucol_openRules(all_rules, u_strlen(all_rules),
+ UCOL_DEFAULT, UCOL_DEFAULT_STRENGTH,
+ NULL, &status);
+ if (U_FAILURE(status))
+ {
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ errmsg("could not open collator for locale \"%s\" with rules \"%s\": %s",
+ iculocstr, icurules, u_errorName(status))));
+ }
+
+ return collator_all_rules;
+ }
+}
+
+/*
+ * strncoll_icu
+ *
+ * Call ucol_strcollUTF8() or ucol_strcoll() as appropriate for the given
+ * database encoding. An argument length of -1 means the string is
+ * NUL-terminated.
+ */
+int
+strncoll_icu(const char *arg1, ssize_t len1, const char *arg2, ssize_t len2,
+ pg_locale_t locale)
+{
+ int result;
+
+ Assert(locale->provider == COLLPROVIDER_ICU);
+
+#ifdef HAVE_UCOL_STRCOLLUTF8
+ if (GetDatabaseEncoding() == PG_UTF8)
+ {
+ UErrorCode status;
+
+ status = U_ZERO_ERROR;
+ result = ucol_strcollUTF8(locale->info.icu.ucol,
+ arg1, len1,
+ arg2, len2,
+ &status);
+ if (U_FAILURE(status))
+ ereport(ERROR,
+ (errmsg("collation failed: %s", u_errorName(status))));
+ }
+ else
+#endif
+ {
+ result = strncoll_icu_no_utf8(arg1, len1, arg2, len2, locale);
+ }
+
+ return result;
+}
+
+/* 'srclen' of -1 means the strings are NUL-terminated */
+size_t
+strnxfrm_icu(char *dest, size_t destsize, const char *src, ssize_t srclen,
+ pg_locale_t locale)
+{
+ char sbuf[TEXTBUFLEN];
+ char *buf = sbuf;
+ UChar *uchar;
+ int32_t ulen;
+ size_t uchar_bsize;
+ Size result_bsize;
+
+ Assert(locale->provider == COLLPROVIDER_ICU);
+
+ init_icu_converter();
+
+ ulen = uchar_length(icu_converter, src, srclen);
+
+ uchar_bsize = (ulen + 1) * sizeof(UChar);
+
+ if (uchar_bsize > TEXTBUFLEN)
+ buf = palloc(uchar_bsize);
+
+ uchar = (UChar *) buf;
+
+ ulen = uchar_convert(icu_converter, uchar, ulen + 1, src, srclen);
+
+ result_bsize = ucol_getSortKey(locale->info.icu.ucol,
+ uchar, ulen,
+ (uint8_t *) dest, destsize);
+
+ /*
+ * ucol_getSortKey() counts the nul-terminator in the result length, but
+ * this function should not.
+ */
+ Assert(result_bsize > 0);
+ result_bsize--;
+
+ if (buf != sbuf)
+ pfree(buf);
+
+ /* if dest is defined, it should be nul-terminated */
+ Assert(result_bsize >= destsize || dest[result_bsize] == '\0');
+
+ return result_bsize;
+}
+
+/* 'srclen' of -1 means the strings are NUL-terminated */
+size_t
+strnxfrm_prefix_icu(char *dest, size_t destsize,
+ const char *src, ssize_t srclen,
+ pg_locale_t locale)
+{
+ size_t result;
+
+ Assert(locale->provider == COLLPROVIDER_ICU);
+
+ if (GetDatabaseEncoding() == PG_UTF8)
+ {
+ UCharIterator iter;
+ uint32_t state[2];
+ UErrorCode status;
+
+ uiter_setUTF8(&iter, src, srclen);
+ state[0] = state[1] = 0; /* won't need that again */
+ status = U_ZERO_ERROR;
+ result = ucol_nextSortKeyPart(locale->info.icu.ucol,
+ &iter,
+ state,
+ (uint8_t *) dest,
+ destsize,
+ &status);
+ if (U_FAILURE(status))
+ ereport(ERROR,
+ (errmsg("sort key generation failed: %s",
+ u_errorName(status))));
+ }
+ else
+ result = strnxfrm_prefix_icu_no_utf8(dest, destsize, src, srclen,
+ locale);
+
+ return result;
+}
+
+/*
+ * Convert a string in the database encoding into a string of UChars.
+ *
+ * The source string at buff is of length nbytes
+ * (it needn't be nul-terminated)
+ *
+ * *buff_uchar receives a pointer to the palloc'd result string, and
+ * the function's result is the number of UChars generated.
+ *
+ * The result string is nul-terminated, though most callers rely on the
+ * result length instead.
+ */
+int32_t
+icu_to_uchar(UChar **buff_uchar, const char *buff, size_t nbytes)
+{
+ int32_t len_uchar;
+
+ init_icu_converter();
+
+ len_uchar = uchar_length(icu_converter, buff, nbytes);
+
+ *buff_uchar = palloc((len_uchar + 1) * sizeof(**buff_uchar));
+ len_uchar = uchar_convert(icu_converter,
+ *buff_uchar, len_uchar + 1, buff, nbytes);
+
+ return len_uchar;
+}
+
+/*
+ * Convert a string of UChars into the database encoding.
+ *
+ * The source string at buff_uchar is of length len_uchar
+ * (it needn't be nul-terminated)
+ *
+ * *result receives a pointer to the palloc'd result string, and the
+ * function's result is the number of bytes generated (not counting nul).
+ *
+ * The result string is nul-terminated.
+ */
+int32_t
+icu_from_uchar(char **result, const UChar *buff_uchar, int32_t len_uchar)
+{
+ UErrorCode status;
+ int32_t len_result;
+
+ init_icu_converter();
+
+ status = U_ZERO_ERROR;
+ len_result = ucnv_fromUChars(icu_converter, NULL, 0,
+ buff_uchar, len_uchar, &status);
+ if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
+ ereport(ERROR,
+ (errmsg("%s failed: %s", "ucnv_fromUChars",
+ u_errorName(status))));
+
+ *result = palloc(len_result + 1);
+
+ status = U_ZERO_ERROR;
+ len_result = ucnv_fromUChars(icu_converter, *result, len_result + 1,
+ buff_uchar, len_uchar, &status);
+ if (U_FAILURE(status) ||
+ status == U_STRING_NOT_TERMINATED_WARNING)
+ ereport(ERROR,
+ (errmsg("%s failed: %s", "ucnv_fromUChars",
+ u_errorName(status))));
+
+ return len_result;
+}
+
+/*
+ * strncoll_icu_no_utf8
+ *
+ * Convert the arguments from the database encoding to UChar strings, then
+ * call ucol_strcoll(). An argument length of -1 means that the string is
+ * NUL-terminated.
+ *
+ * When the database encoding is UTF-8, and ICU supports ucol_strcollUTF8(),
+ * caller should call that instead.
+ */
+static int
+strncoll_icu_no_utf8(const char *arg1, ssize_t len1,
+ const char *arg2, ssize_t len2, pg_locale_t locale)
+{
+ char sbuf[TEXTBUFLEN];
+ char *buf = sbuf;
+ int32_t ulen1;
+ int32_t ulen2;
+ size_t bufsize1;
+ size_t bufsize2;
+ UChar *uchar1,
+ *uchar2;
+ int result;
+
+ Assert(locale->provider == COLLPROVIDER_ICU);
+#ifdef HAVE_UCOL_STRCOLLUTF8
+ Assert(GetDatabaseEncoding() != PG_UTF8);
+#endif
+
+ init_icu_converter();
+
+ ulen1 = uchar_length(icu_converter, arg1, len1);
+ ulen2 = uchar_length(icu_converter, arg2, len2);
+
+ bufsize1 = (ulen1 + 1) * sizeof(UChar);
+ bufsize2 = (ulen2 + 1) * sizeof(UChar);
+
+ if (bufsize1 + bufsize2 > TEXTBUFLEN)
+ buf = palloc(bufsize1 + bufsize2);
+
+ uchar1 = (UChar *) buf;
+ uchar2 = (UChar *) (buf + bufsize1);
+
+ ulen1 = uchar_convert(icu_converter, uchar1, ulen1 + 1, arg1, len1);
+ ulen2 = uchar_convert(icu_converter, uchar2, ulen2 + 1, arg2, len2);
+
+ result = ucol_strcoll(locale->info.icu.ucol,
+ uchar1, ulen1,
+ uchar2, ulen2);
+
+ if (buf != sbuf)
+ pfree(buf);
+
+ return result;
+}
+
+/* 'srclen' of -1 means the strings are NUL-terminated */
+static size_t
+strnxfrm_prefix_icu_no_utf8(char *dest, size_t destsize,
+ const char *src, ssize_t srclen,
+ pg_locale_t locale)
+{
+ char sbuf[TEXTBUFLEN];
+ char *buf = sbuf;
+ UCharIterator iter;
+ uint32_t state[2];
+ UErrorCode status;
+ int32_t ulen = -1;
+ UChar *uchar = NULL;
+ size_t uchar_bsize;
+ Size result_bsize;
+
+ Assert(locale->provider == COLLPROVIDER_ICU);
+ Assert(GetDatabaseEncoding() != PG_UTF8);
+
+ init_icu_converter();
+
+ ulen = uchar_length(icu_converter, src, srclen);
+
+ uchar_bsize = (ulen + 1) * sizeof(UChar);
+
+ if (uchar_bsize > TEXTBUFLEN)
+ buf = palloc(uchar_bsize);
+
+ uchar = (UChar *) buf;
+
+ ulen = uchar_convert(icu_converter, uchar, ulen + 1, src, srclen);
+
+ uiter_setString(&iter, uchar, ulen);
+ state[0] = state[1] = 0; /* won't need that again */
+ status = U_ZERO_ERROR;
+ result_bsize = ucol_nextSortKeyPart(locale->info.icu.ucol,
+ &iter,
+ state,
+ (uint8_t *) dest,
+ destsize,
+ &status);
+ if (U_FAILURE(status))
+ ereport(ERROR,
+ (errmsg("sort key generation failed: %s",
+ u_errorName(status))));
+
+ return result_bsize;
+}
+
+static void
+init_icu_converter(void)
+{
+ const char *icu_encoding_name;
+ UErrorCode status;
+ UConverter *conv;
+
+ if (icu_converter)
+ return; /* already done */
+
+ icu_encoding_name = get_encoding_name_for_icu(GetDatabaseEncoding());
+ if (!icu_encoding_name)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("encoding \"%s\" not supported by ICU",
+ pg_encoding_to_char(GetDatabaseEncoding()))));
+
+ status = U_ZERO_ERROR;
+ conv = ucnv_open(icu_encoding_name, &status);
+ if (U_FAILURE(status))
+ ereport(ERROR,
+ (errmsg("could not open ICU converter for encoding \"%s\": %s",
+ icu_encoding_name, u_errorName(status))));
+
+ icu_converter = conv;
+}
+
+/*
+ * Find length, in UChars, of given string if converted to UChar string.
+ *
+ * A length of -1 indicates that the input string is NUL-terminated.
+ */
+static size_t
+uchar_length(UConverter *converter, const char *str, int32_t len)
+{
+ UErrorCode status = U_ZERO_ERROR;
+ int32_t ulen;
+
+ ulen = ucnv_toUChars(converter, NULL, 0, str, len, &status);
+ if (U_FAILURE(status) && status != U_BUFFER_OVERFLOW_ERROR)
+ ereport(ERROR,
+ (errmsg("%s failed: %s", "ucnv_toUChars", u_errorName(status))));
+ return ulen;
+}
+
+/*
+ * Convert the given source string into a UChar string, stored in dest, and
+ * return the length (in UChars).
+ *
+ * A srclen of -1 indicates that the input string is NUL-terminated.
+ */
+static int32_t
+uchar_convert(UConverter *converter, UChar *dest, int32_t destlen,
+ const char *src, int32_t srclen)
+{
+ UErrorCode status = U_ZERO_ERROR;
+ int32_t ulen;
+
+ status = U_ZERO_ERROR;
+ ulen = ucnv_toUChars(converter, dest, destlen, src, srclen, &status);
+ if (U_FAILURE(status))
+ ereport(ERROR,
+ (errmsg("%s failed: %s", "ucnv_toUChars", u_errorName(status))));
+ return ulen;
+}
+
+/*
+ * Parse collation attributes from the given locale string and apply them to
+ * the open collator.
+ *
+ * First, the locale string is canonicalized to an ICU format locale ID such
+ * as "und@colStrength=primary;colCaseLevel=yes". Then, it parses and applies
+ * the key-value arguments.
+ *
+ * Starting with ICU version 54, the attributes are processed automatically by
+ * ucol_open(), so this is only necessary for emulating this behavior on older
+ * versions.
+ */
+pg_attribute_unused()
+static void
+icu_set_collation_attributes(UCollator *collator, const char *loc,
+ UErrorCode *status)
+{
+ int32_t len;
+ char *icu_locale_id;
+ char *lower_str;
+ char *str;
+ char *token;
+
+ /*
+ * The input locale may be a BCP 47 language tag, e.g.
+ * "und-u-kc-ks-level1", which expresses the same attributes in a
+ * different form. It will be converted to the equivalent ICU format
+ * locale ID, e.g. "und@colcaselevel=yes;colstrength=primary", by
+ * uloc_canonicalize().
+ */
+ *status = U_ZERO_ERROR;
+ len = uloc_canonicalize(loc, NULL, 0, status);
+ icu_locale_id = palloc(len + 1);
+ *status = U_ZERO_ERROR;
+ len = uloc_canonicalize(loc, icu_locale_id, len + 1, status);
+ if (U_FAILURE(*status) || *status == U_STRING_NOT_TERMINATED_WARNING)
+ return;
+
+ lower_str = asc_tolower(icu_locale_id, strlen(icu_locale_id));
+
+ pfree(icu_locale_id);
+
+ str = strchr(lower_str, '@');
+ if (!str)
+ return;
+ str++;
+
+ while ((token = strsep(&str, ";")))
+ {
+ char *e = strchr(token, '=');
+
+ if (e)
+ {
+ char *name;
+ char *value;
+ UColAttribute uattr;
+ UColAttributeValue uvalue;
+
+ *status = U_ZERO_ERROR;
+
+ *e = '\0';
+ name = token;
+ value = e + 1;
+
+ /*
+ * See attribute name and value lists in ICU i18n/coll.cpp
+ */
+ if (strcmp(name, "colstrength") == 0)
+ uattr = UCOL_STRENGTH;
+ else if (strcmp(name, "colbackwards") == 0)
+ uattr = UCOL_FRENCH_COLLATION;
+ else if (strcmp(name, "colcaselevel") == 0)
+ uattr = UCOL_CASE_LEVEL;
+ else if (strcmp(name, "colcasefirst") == 0)
+ uattr = UCOL_CASE_FIRST;
+ else if (strcmp(name, "colalternate") == 0)
+ uattr = UCOL_ALTERNATE_HANDLING;
+ else if (strcmp(name, "colnormalization") == 0)
+ uattr = UCOL_NORMALIZATION_MODE;
+ else if (strcmp(name, "colnumeric") == 0)
+ uattr = UCOL_NUMERIC_COLLATION;
+ else
+ /* ignore if unknown */
+ continue;
+
+ if (strcmp(value, "primary") == 0)
+ uvalue = UCOL_PRIMARY;
+ else if (strcmp(value, "secondary") == 0)
+ uvalue = UCOL_SECONDARY;
+ else if (strcmp(value, "tertiary") == 0)
+ uvalue = UCOL_TERTIARY;
+ else if (strcmp(value, "quaternary") == 0)
+ uvalue = UCOL_QUATERNARY;
+ else if (strcmp(value, "identical") == 0)
+ uvalue = UCOL_IDENTICAL;
+ else if (strcmp(value, "no") == 0)
+ uvalue = UCOL_OFF;
+ else if (strcmp(value, "yes") == 0)
+ uvalue = UCOL_ON;
+ else if (strcmp(value, "shifted") == 0)
+ uvalue = UCOL_SHIFTED;
+ else if (strcmp(value, "non-ignorable") == 0)
+ uvalue = UCOL_NON_IGNORABLE;
+ else if (strcmp(value, "lower") == 0)
+ uvalue = UCOL_LOWER_FIRST;
+ else if (strcmp(value, "upper") == 0)
+ uvalue = UCOL_UPPER_FIRST;
+ else
+ {
+ *status = U_ILLEGAL_ARGUMENT_ERROR;
+ break;
+ }
+
+ ucol_setAttribute(collator, uattr, uvalue, status);
+ }
+ }
+
+ pfree(lower_str);
+}
+
+#endif /* USE_ICU */
projects / users / c2main / postgres.git / commitdiff