PCRE - Perl-compatible regular expressions .rs #include <pcre.h>

 int pcre_pattern_to_host_byte_order(pcre *code,  " pcre_extra *extra, const unsigned char *tables);"  int pcre16_pattern_to_host_byte_order(pcre16 *code,  " pcre16_extra *extra, const unsigned char *tables);"  int pcre32_pattern_to_host_byte_order(pcre32 *code,  " pcre32_extra *extra, const unsigned char *tables);" 

. .rs This function ensures that the bytes in 2-byte and 4-byte values in a compiled pattern are in the correct order for the current host. It is useful when a pattern that has been compiled on one host is transferred to another that might have different endianness. The arguments are: code A compiled regular expression extra Points to an associated pcre[16|32]_extra structure, or is NULL tables Pointer to character tables, or NULL to set the built-in default The result is 0 for success, a negative PCRE_ERROR_xxx value otherwise.

There is a complete description of the PCRE native API in the HREF
pcreapi
page and a description of the POSIX API in the HREF
pcreposix
page.