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author | Mattias Andrée <maandree@kth.se> | 2021-03-05 00:43:38 +0100 |
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committer | Mattias Andrée <maandree@kth.se> | 2021-03-05 00:43:38 +0100 |
commit | 0ce0d8d6e0c420ccafa79e0203b928c3559a4311 (patch) | |
tree | 88e8228a93691c28811a49898abf86a96dd9d613 /libgamma_behex_edid_lowercase.c | |
parent | Change license + change style + misc (diff) | |
download | libgamma-0ce0d8d6e0c420ccafa79e0203b928c3559a4311.tar.gz libgamma-0ce0d8d6e0c420ccafa79e0203b928c3559a4311.tar.bz2 libgamma-0ce0d8d6e0c420ccafa79e0203b928c3559a4311.tar.xz |
Split source files, merge public header files, eliminite use gpp, rewrite makefile
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to '')
-rw-r--r-- | libgamma_behex_edid_lowercase.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/libgamma_behex_edid_lowercase.c b/libgamma_behex_edid_lowercase.c new file mode 100644 index 0000000..9c4f04e --- /dev/null +++ b/libgamma_behex_edid_lowercase.c @@ -0,0 +1,33 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +/** + * Convert a raw representation of an EDID to a lowercase hexadecimal representation + * + * @param edid The EDID in raw representation + * @param length The length of `edid` + * @return The EDID in lowercase hexadecimal representation, + * `NULL` on allocation error, `errno` will be set accordingly + */ +char * +libgamma_behex_edid_lowercase(const unsigned char *restrict edid, size_t length) +{ + char *restrict out; + size_t i; + + /* Allocate memory area for the output string */ + out = malloc((length * 2 + 1) * sizeof(char)); + if (!out) + return NULL; + + /* Translate from raw octets to hexadecimal */ + for (i = 0; i < length; i++) { + out[i * 2 + 0] = "0123456789abcdef"[(edid[i] >> 4) & 15]; + out[i * 2 + 1] = "0123456789abcdef"[(edid[i] >> 0) & 15]; + } + /* NUL-terminate the output string */ + out[length * 2] = '\0'; + + return out; +} |