NNG_STRDUP(3)

💖 NNG_STRDUP 💖

okay bestie, welcome to the NNG Reference Manual — today's main character is nng_strdup, the lil function that copies a string for you so you don't have to think about it 💅

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✨ NAME ✨

nng_strdup — duplicate string 🦋

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🌸 SYNOPSIS 🌸

#include <nng/nng.h>

char *nng_strdup(const char *src);

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🎀 DESCRIPTION 🎀

so nng_strdup() takes your string src, duplicates it, and hands it right back to you. it's giving copy-paste but ✨allocated✨

like, logically it's the exact same thing as calling nng_alloc() to allocate a chunk of memory that's strlen(s) + 1 bytes big, and then using strcpy() to copy the string into that destination before returning it. no cap, that's literally the whole deal 💀

the string you get back should be deallocated with nng_strfree(), or it may be deallocated using nng_free() — in which case you use the length of the returned string plus one (that's the NUL terminating byte, bestie, don't forget it 🫶).

🔴 Important 🔴 do NOT use the system free() or similar functions to deallocate the string, because those may use a different memory arena! that's a whole different friend group and they will not recognize your pointer 😭

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🌈 RETURN VALUES 🌈

• on success: it returns the new string, slay 👑
• on failure: it returns NULL 💀

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⭐ ERRORS ⭐

no errors are returned, but if you get a NULL return value you should treat it the same as NNG_ENOMEM. periodt.

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🧚 SEE ALSO 🧚

• nng_alloc(3)
• nng_free(3)
• nng(7)

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that's the whole vibe check, bestie 💜 this was the NNG Reference Manual, page NNG_STRDUP(3), dated 2026-06-30 — go forth and duplicate responsibly, and remember: only nng_strfree() or nng_free(), never the system free(). mwah 🎀✨