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Wrap ICU ucol_open(). 

Hide details of supporting older ICU versions in a wrapper
function. The current code only needs to handle
icu_set_collation_attributes(), but a subsequent commit will add
additional version-specific code.

Discussion: https://postgr.es/m/7ee414ad-deb5-1144-8a0e-b34ae3b71cd5@enterprisedb.com
Reviewed-by: Peter Eisentraut
This commit is contained in:
Jeff Davis 2023-03-23 09:15:25 -07:00
parent adedf54e65
commit a326aac8f1
1 changed files with 43 additions and 27 deletions
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70
src/backend/utils/adt/pg_locale.c
View File

@ -140,6 +140,7 @@ static char *IsoLocaleName(const char *);
*/
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);
@ -1430,17 +1431,8 @@ make_icu_collator(const char *iculocstr,
{
#ifdef USE_ICU
UCollator *collator;
UErrorCode status;
status = U_ZERO_ERROR;
collator = ucol_open(iculocstr, &status);
if (U_FAILURE(status))
ereport(ERROR,
(errmsg("could not open collator for locale \"%s\": %s",
iculocstr, u_errorName(status))));
if (U_ICU_VERSION_MAJOR_NUM < 54)
icu_set_collation_attributes(collator, iculocstr);
collator = pg_ucol_open(iculocstr);
/*
* If rules are specified, we extract the rules of the standard collation,
@ -1451,6 +1443,7 @@ make_icu_collator(const char *iculocstr,
const UChar *default_rules;
UChar *agg_rules;
UChar *my_rules;
UErrorCode status;
int32_t length;
default_rules = ucol_getRules(collator, &length);
@ -1722,16 +1715,11 @@ get_collation_actual_version(char collprovider, const char *collcollate)
if (collprovider == COLLPROVIDER_ICU)
{
UCollator *collator;
UErrorCode status;
UVersionInfo versioninfo;
char buf[U_MAX_VERSION_STRING_LENGTH];
status = U_ZERO_ERROR;
collator = ucol_open(collcollate, &status);
if (U_FAILURE(status))
ereport(ERROR,
(errmsg("could not open collator for locale \"%s\": %s",
collcollate, u_errorName(status))));
collator = pg_ucol_open(collcollate);
ucol_getVersion(collator, versioninfo);
ucol_close(collator);
@ -2505,6 +2493,43 @@ pg_strnxfrm_prefix(char *dest, size_t destsize, const char *src,
}
#ifdef USE_ICU
/*
* Wrapper around ucol_open() to handle API differences for older ICU
* versions.
*/
static UCollator *
pg_ucol_open(const char *loc_str)
{
UCollator *collator;
UErrorCode status;
/*
* Must never open default collator, because it depends on the environment
* and may change at any time.
*
* 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)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("opening default collator is not supported")));
status = U_ZERO_ERROR;
collator = ucol_open(loc_str, &status);
if (U_FAILURE(status))
ereport(ERROR,
(errmsg("could not open collator for locale \"%s\": %s",
loc_str, u_errorName(status))));
if (U_ICU_VERSION_MAJOR_NUM < 54)
icu_set_collation_attributes(collator, loc_str);
return collator;
}
static void
init_icu_converter(void)
{
@ -2771,17 +2796,8 @@ check_icu_locale(const char *icu_locale)
{
#ifdef USE_ICU
UCollator *collator;
UErrorCode status;
status = U_ZERO_ERROR;
collator = ucol_open(icu_locale, &status);
if (U_FAILURE(status))
ereport(ERROR,
(errmsg("could not open collator for locale \"%s\": %s",
icu_locale, u_errorName(status))));
if (U_ICU_VERSION_MAJOR_NUM < 54)
icu_set_collation_attributes(collator, icu_locale);
collator = pg_ucol_open(icu_locale);
ucol_close(collator);
#else
ereport(ERROR,