strpfx.txt

来自「dos 1.0 其中包含quick basic源代码、内存管理himem emm」· 文本 代码 · 共 41 行

SUMMARY Determine if one string is a prefix of another.

KEYWORDS strprefix striprefix

USAGE

#include <strpfx.h>

char* strprefix (
    char* szTest,
    char* szFull
    );

char* striprefix (
    char* szTest,
    char* szFull
    );

DESCRIPTION

strprefix and striprefix determine if the szTest argument is
a prefix of the szFull argument.  Strprefix is case sensitive,
while striprefix is case insensitive.

RETURN VALUE

Both routines return NULL if szTest is not a prefix of szFull.

If szTest is a prefix of szFull, the returned pointer identifies
the first character of szFull beyond the match.	 Thus, if the
return is a pointer to a zero byte ('\0'), the szTest is an exact
match of szFull, not just a prefix.

EXAMPLE

strprefix ( "a", "arg" );	// pointer to "rg" returned
strprefix ( "a", "ARG" );	// NULL returned

striprefix ( "a", "ARG" );	// pointer to "RG" returned
striprefix ( "Arg", "ARG" );	// pointer to "" returned