wc-width-test.c

wc-width-test.c

#define _XOPEN_SOURCE
#include <stdio.h>
#include <wchar.h>
#include <locale.h>

int main(void) {
    setlocale(LC_ALL, "");

    struct {
        wchar_t ch;
        const char *name;
    } letters[] = {
        /* Malayalam - width 1 */
        { L'അ',  "Malayalam: അ (a)" },
        { L'ആ',  "Malayalam: ആ (aa)" },
        { L'ക',  "Malayalam: ക (ka)" },
        { L'ഴ',  "Malayalam: ഴ (zha)" },
        { L'ൾ',  "Malayalam: ൾ (chillu ll)" },

        /* CJK Unified Ideographs - width 2 */
        { L'中',  "Chinese: 中 (zhong, middle)" },
        { L'日',  "Japanese: 日 (hi, sun/day)" },
        { L'한',  "Korean: 한 (han)" },
        { L'語',  "CJK: 語 (language)" },
        { L'火',  "CJK: 火 (fire)" },

        /* CJK Extension B (beyond BMP) - width 2 */
        { L'𠀀',  "CJK Ext-B: 𠀀 (U+20000)" },
        { L'𡀀',  "CJK Ext-B: 𡀀 (U+21000)" },

        /* Fullwidth Latin - width 2 */
        { L'Ａ',  "Fullwidth: Ａ (U+FF21)" },
        { L'！',  "Fullwidth: ！ (U+FF01)" },

        /* Emoji / symbols - width 2 */
        { L'★',  "Symbol: ★ BLACK STAR (U+2605)" },
        { L'→',  "Symbol: → RIGHT ARROW (U+2192)" },

        /* Zero-width / combining - width 0 */
        { L'\u200C', "ZWNJ (U+200C)" },
        { L'\u200D', "ZWJ  (U+200D)" },
        { L'\u0300', "Combining grave accent (U+0300)" },
        { L'\u0D4D', "Malayalam virama ്  (U+0D4D)" },

        /* Latin & other scripts - width 1 */
        { L'é',  "Latin: é (U+00E9)" },
        { L'ñ',  "Latin: ñ (U+00F1)" },
        { L'Ж',  "Cyrillic: Ж (zhe)" },
        { L'α',  "Greek: α (alpha)" },
        { L'ש',  "Hebrew: ש (shin)" },
        { L'ع',  "Arabic: ع (ayn)" },
        { L'ก',  "Thai: ก (ko kai)" },
        { L'ሀ',  "Ethiopic: ሀ (ha)" },

        { L'\0', NULL }
    };

    printf("%-38s  %-10s  %s\n", "Character", "U+Code",   "wcwidth");
    printf("%-38s  %-10s  %s\n", "---------", "------",   "-------");

    for (int i = 0; letters[i].ch != L'\0'; i++) {
        int w = wcwidth(letters[i].ch);
        printf("%-38s  U+%06X    %d\n",
               letters[i].name,
               (unsigned int)letters[i].ch,
               w);
    }

    return 0;
}