TIFFSWAB(3tiff)

💅 TIFFSWAB — byte- and bit-swapping routines

okay bestie, welcome to TIFFswab(3tiff) from LibTIFF — the little family of functions that flips your bytes around so your endianness situation stops being a whole mess. it's giving endianness rescue mission and honestly? obsessed. 🦋

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✨ SYNOPSIS ✨

#include <tiffio.h>

const unsigned char *TIFFGetBitRevTable(int reversed)

void TIFFReverseBits(u_char *data, unsigned long nbytes)

void TIFFSwabShort(uint16_t *data)

void TIFFSwabLong(uint32_t *data)

void TIFFSwabLong8(uint64_t *lp)

void TIFFSwabFloat(float *fp)

void TIFFSwabDouble(double *dp)

void TIFFSwabArrayOfShort(uint16_t *wp, tmsize_t n)

void TIFFSwabArrayOfTriples(uint8_t *tp, tmsize_t n)

void TIFFSwabArrayOfLong(uint32_t *lp, tmsize_t n)

void TIFFSwabArrayOfLong8(uint64_t *lp, tmsize_t n)

void TIFFSwabArrayOfFloat(float *fp, tmsize_t n)

void TIFFSwabArrayOfDouble(double *dp, tmsize_t n)

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🌸 DESCRIPTION 🌸

so here's the tea ☕: these routines are the ones the library itself uses to swap 16-, 32- and 64-bit data around, plus reverse the order of bits inside bytes. lowkey iconic of them.

• TIFFSwabShort() and TIFFSwabLong() and TIFFSwabFloat() — swap the bytes in a single 16- and 32-bit item, respectively.
• TIFFSwabLong8() and TIFFSwabDouble() — swap the bytes in a single 64-bit item.
• TIFFSwabArrayOfTriples() — swaps the first and the third byte of each triple (three bytes) inside the byte array. the second byte of each triple stays untouched, minding its own business. 🙈
• TIFFSwabArrayOfShort() and TIFFSwabArrayOfLong(), TIFFSwabArrayOfFloat() — swap the bytes in an array of 16- and 32-bit items, respectively.
• TIFFSwabArrayOfLong8() and TIFFSwabArrayOfDouble() — swap the bytes in an array of 64-bit items.

and then there's TIFFReverseBits() 💫 — it replaces each byte in data with the equivalent bit-reversed value. this operation is performed with a lookup table, which is returned using the TIFFGetBitRevTable() function.

the reversed parameter specifies which table should be returned, so listen up:

1. Supply 1 if you want the bit reversal table.
2. Supply 0 to get the table that does not reverse bit values. it's a lookup table that can be used as an "identity function"; i.e. TIFFNoBitRevTable[n] == n.

fr fr, pick your table wisely — 1 flips, 0 does absolutely nothing and that's the whole point of it. 👑

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💀 DIAGNOSTICS 💀

None.

like… none at all. no drama, no error codes, nothing. she's silent. 🤫

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👀 SEE ALSO 👀

• libtiff (3tiff)

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🫶 AUTHOR 🫶

LibTIFF contributors

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🎀 COPYRIGHT 🎀

1988-2025, LibTIFF contributors

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and that's the whole page, bestie — slay 💖 this was LibTIFF version 4.7, dated Jun 27, 2026, and yes she ate, periodt. ✨🧚💜