SYNOPSIS

#include <vips/vips.h>

int im_isMSBfirst( im )
IMAGE *im;

int im_amiMSBfirst( void )

int im_fexists( const char *filename, ... )

int im_isvips( filename )
char *filename;

int im_isfile( im )
IMAGE *im;

int im_ispartial( im )
IMAGE *im;

int im_isint( im )
IMAGE *im;

int im_isuint( im )
IMAGE *im;

int im_isfloat( im )
IMAGE *im;

int im_isscalar( im )
IMAGE *im;

int im_iscomplex( im )
IMAGE *im;

DESCRIPTION

im_fexists(3) returns non-zero if the named file exists and is readable. Args as printf(3).

im_isvips(3) tests a file for vips-ness.

im_isMSBfirst(3) returns true (1) if the file is in most-significant-byte first form. This is the byte order used on the SPARC architecture, and others. It returns false (0)for intel-order images.

im_amiMSBfirst(3) returns true (1) if this processor is MSB first.

im_isfile(3) returns true if the descriptor corresponds to some disc object, that is, was opened with modes "r", "rw" or "w".

im_ispartial(3) returns true if the descriptor is partial, that is, was opened with mode "p".

The rest of these functions test im->BandFmt, returning logical truth (non-zero) if BandFmt is one of a number of possibles, and returning zero if it is not.

im_isint(3) (is integer type) returns true if im->BandFmt is one of FMTUCHAR, FMTCHAR, FMTUSHORT, FMTSHORT, FMTUINT or FMTINT.

im_isuint(3) (is unsigned integer type) returns true if im->BandFmt is one of FMTUCHAR, FMTUSHORT or FMTUINT.

im_isfloat(3) (is floating point type) returns true if im->BandFmt is one of FMTFLOAT or FMTDOUBLE.

im_isscalar(3) (is scalar type) returns true if im->BandFmt is one of FMTUCHAR, FMTCHAR, FMTUSHORT, FMTSHORT, FMTUINT, FMTINT, FMTFLOAT or FMTDOUBLE.

im_iscomplex(3) (is complex type) returns true if im->BandFmt is one of FMTCOMPLEX or FMTDPCOMPLEX.

COPYRIGHT

National Gallery, 1993

AUTHOR

J. Cupitt - 23/7/93