10.1094 strstr
POSIX specification:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/strstr.html
Gnulib module: strstr or strstr-simple
Portability problems fixed by either Gnulib module strstr-simple
or strstr:
- This function can trigger memchr bugs on some platforms:
glibc 2.10.
- This function can trigger false positives for long periodic needles on
some platforms:
glibc 2.12, Cygwin 1.7.7.
- This function may fail to find matches on some platforms:
glibc 2.28.
Portability problems fixed by Gnulib strstr:
- This function has quadratic instead of linear worst-case complexity on some
platforms:
glibc 2.8, macOS 11.1, FreeBSD 6.2, NetBSD 9.0, OpenBSD 4.0, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.4, Cygwin 1.5.x, mingw, MSVC 14.
Portability problems not fixed by Gnulib:
- This function cannot work correctly on character strings in most multibyte
locales. Gnulib provides an alternative function
mbsstr that works
on character strings in all locales.