Dump ICU UCollator rules

dump_ucol_rules.c

#include <stdio.h>

#define icu_error(status, function) \
    fprintf(stderr, "ICU Error \"%s\" from " function "()\n", u_errorName(status))

#define ARRAY_SIZE(array)     (sizeof(array) / sizeof((array)[0]))
#define USTRING_SIZE(array)   ARRAY_SIZE(array)
#define USTRING_LENGTH(array) (USTRING_SIZE(array) - 1)

#include <unicode/ustdio.h>

#define u_printf(...)                                 \
    do {                                              \
        UFILE *ustdout = u_finit(stdout, NULL, NULL); \
        u_fprintf(ustdout, ## __VA_ARGS__);           \
    } while (0);


/* ================================================== */

#include <stdlib.h>
#include <unicode/ucol.h>

int main(void)
{
    UErrorCode status;
    UCollator *ucol;

    status = U_ZERO_ERROR;
    ucol = ucol_open("fr_FR", &status);
    //ucol_setAttribute(ucol, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
    ucol_setStrength(ucol, UCOL_TERTIARY);

    {
        UChar *rules;
        int32_t rules_len, rules_size, ret;
        UColRuleOption delta = UCOL_FULL_RULES;
//         UColRuleOption delta = UCOL_TAILORING_ONLY; /* Locale rules only, *if* any */

        rules = NULL;
        rules_size = 0;
        rules_len = ucol_getRulesEx(ucol, delta, rules, rules_size);
        printf("rules_len = %d\n", rules_len);
        rules_size = rules_len + 1;
        rules = calloc(rules_size, sizeof(*rules));
        ret = ucol_getRulesEx(ucol, delta, rules, rules_size);
        u_printf("rules (%d) = (%d) >%S<\n", ret, rules_len, rules);

        free(rules);
    }

    ucol_close(ucol);

    return 0;
}