wnscan(3)

NAME

wn_scan_for_eos, wn_scan_for_char, wn_scan_for_char_type,

wn_scan_for_not_char_type, wn_scan_for_literal - scan cstream for

patterns

SYNOPSIS

#include <wn/wncstr.h>
bool wn_scan_for_eos(stream)
wn_cstream stream;
bool wn_scan_for_char(stream,c)
wn_cstream stream;
char c;
bool wn_scan_for_char_type(stream,char_type)
wn_cstream stream;
char char_type[256];
bool wn_scan_for_not_char_type(stream,char_type)
wn_cstream stream;
char char_type[256];
bool wn_scan_for_literal(stream,literal)
wn_cstream stream;
char literal[];

DESCRIPTION

These routines scan stream for the indicated pattern.

They return TRUE and set the current mark to the beginning of the

pattern if successful. Otherwise, they return FALSE and leave

current mark unaltered.

wn_scan_for_char_type scans for a character c which satis

fies char_type[c] == TRUE. wn_scan_for_char_type returns FALSfP

if such a char cannot be found.

wn_scan_for_not_char_type scans for a character c which

satisfies char_type[c] == FALSE. End of stream is considered to

be a match, so wn_scan_for_not_char_type always succeeds.

BUGS

More scan routines are needed.

Need routines to scan between 2 marks rather than between

a mark and end of stream.

Need routines to scan backward.

What about scan for regular expressions?

SEE ALSO

wncstr, wnptok, wnary

AUTHOR

Will Naylor

WNLIB August 23, 1998

WNSCAN(3)