UNICODE_UC(3)

💖 UNICODE_UC — bestie, it's giving case conversion 💖

okay so real talk, this is the unicode_uc family from the Courier Unicode Library, and it's literally the whole "make this letter big / small / fancy-first-letter" department. no cap.

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✨ NAME ✨

unicode_uc, unicode_lc, unicode_tc, unicode_convert_tocase — unicode uppercase, lowercase, and titlecase character lookup. that's the whole assignment bestie, and they ATE. 💅

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🦋 SYNOPSIS 🦋

#include <courier-unicode.h>

char32_t unicode_uc(char32_t c);

char32_t unicode_lc(char32_t c);

char32_t unicode_tc(char32_t c);

char *unicode_convert_tocase(const char *str, const char *charset,
                             char32_t (*first_char_func)(uncode_char),
                             char32_t (*char_func)(uncode_char));

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🌸 DESCRIPTION 🌸

so unicode_uc(), unicode_lc(), and unicode_tc() hand you back the uppercase, lowercase, or titlecase equivalent of the unicode character c. simple. iconic. no drama.

and here's the part where it's actually chill: if that character does not have an uppercase, lowercase, or titlecase equivalent? they just return c, the same character. no error, no crash, no mid-function crisis. it just hands you back what you gave it. 🫶

now unicode_convert_tocase() is the main character of this page. it takes the string str in the character set charset.

first_char_func and char_func, each, should be unicode_uc, unicode_lc, or unicode_tc. pick your fighters. 👑

unicode_convert_tocase() returns a malloc()ed buffer. yes bestie, that's your buffer now, you own it, you free it. don't leave it orphaned, that's so not the vibe. 😭

and the split? the first unicode character in str gets processed by first_char_func, and all the other characters by char_func. so you really CAN do the "capitalize just the first letter" glow-up separately from the rest. periodt. ✨

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👑 SEE ALSO 👑

• courier-unicode(7)
• unicode_wcwidth(3)
• unicode_convert(3)
• unicode_default_chset(3)
• unicode_html40ent_lookup(3)
• unicode_category_lookup(3)
• unicode_grapheme_break(3)
• unicode_word_break(3)
• unicode_line_break(3)

go read those too, they're all part of the same friend group fr fr 🦋

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💜 AUTHOR 💜

Sam Varshavchik — Author. absolute legend behavior, we stan. 🙈

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okay that's the whole page bestie, no notes 💖 and for the cute little sign-off: this lil slice of wisdom comes to you from the Courier Unicode Library, dated 04/12/2026, filed under UNICODE_UC(3). slay, stay cased, and free your malloc()s. 🎀✨