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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:17:33 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:17:33 +0000 |
commit | 5e45211a64149b3c659b90ff2de6fa982a5a93ed (patch) | |
tree | 739caf8c461053357daa9f162bef34516c7bf452 /src/port/strnlen.c | |
parent | Initial commit. (diff) | |
download | postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.tar.xz postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.zip |
Adding upstream version 15.5.upstream/15.5
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/port/strnlen.c')
-rw-r--r-- | src/port/strnlen.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/port/strnlen.c b/src/port/strnlen.c new file mode 100644 index 0000000..27dec18 --- /dev/null +++ b/src/port/strnlen.c @@ -0,0 +1,33 @@ +/*------------------------------------------------------------------------- + * + * strnlen.c + * Fallback implementation of strnlen(). + * + * + * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group + * Portions Copyright (c) 1994, Regents of the University of California + * + * IDENTIFICATION + * src/port/strnlen.c + * + *------------------------------------------------------------------------- + */ + +#include "c.h" + +/* + * Implementation of posix' strnlen for systems where it's not available. + * + * Returns the number of characters before a null-byte in the string pointed + * to by str, unless there's no null-byte before maxlen. In the latter case + * maxlen is returned. + */ +size_t +strnlen(const char *str, size_t maxlen) +{ + const char *p = str; + + while (maxlen-- > 0 && *p) + p++; + return p - str; +} |