Datasheet

The C and C++ Libraries
ARM DUI 0067D Copyright © 1999-2001 ARM Limited. All rights reserved. 4-37
4.6.7 _get_lc_numeric()
_get_lc_numeric() must return a pointer to an __lc_numeric_blk structure. Use the
macros in Example 4-7 to create the structure.
Example 4-7 LC_NUMERIC_DEF
__LC_NUMERIC_DEF(lcnumeric_c, "C",".","","")
__LC_NUMERIC_DEF(lcnumeric_iso8859_1, "ISO8859-1",
".", ",", "\3")
__LC_NUMERIC_DEF(lcnumeric_fr, "fr", ",", ".", "\3")
__LC_INDEX_END(lcnumeric_dummy)
void const *_get_lc_numeric(void const *null, char const *name) {
return _findlocale(&lcnumeric_c_index, name);
}
void test_lc_numeric(void) {
double pi = 4*atan(1.);
char buf[20];
/* Test changing decimal point as we shift in and out of French
* numeric locale. */
EQS(setlocale(LC_NUMERIC, NULL), "C"); /* verify starting point */
snprintf(buf, sizeof(buf), "%g", pi); EQS(buf, "3.14159");
EQI(!setlocale(LC_NUMERIC, "ISO8859-1"), 0); /* setlocale should work */
EQS(setlocale(LC_NUMERIC, NULL), "ISO8859-1");
snprintf(buf, sizeof(buf), "%g", pi); EQS(buf, "3.14159");
EQI(!setlocale(LC_NUMERIC, "fr"), 0); /* setlocale should work */
EQS(setlocale(LC_NUMERIC, NULL), "fr");
snprintf(buf, sizeof(buf), "%g", pi); EQS(buf, "3,14159");
EQI(!setlocale(LC_NUMERIC, "C"), 0); /* setlocale should work */
EQS(setlocale(LC_NUMERIC, NULL), "C");
snprintf(buf, sizeof(buf), "%g", pi); EQS(buf, "3.14159");
}
The offset fields are interpreted similarly to __lc_monetary_blk .