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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <ctotok.h>
include <ctype.h>
include "../lib/ids.h"
# OFFSET -- Change the bias (offset) for certain colors
procedure offset()
int tok, i, nchar, ip
char token[SZ_LINE]
short color[IDS_MAXGCOLOR+1]
short offsetdata[4] # extra space for cvmove EOD
int count, ctoi()
include "cv.com"
begin
# In principle, we should be able to accept input for color group
# followed by offset value(s) or "vice versa" or for a series of
# color/offset pairs. We try for most of that.
color[1] = ERR
offsetdata[1] = ERR
count = 1
# anything but TOK_NEWLINE
tok = TOK_NUMBER
repeat {
if (tok == TOK_NEWLINE) {
call eprintf ("Insufficient offset specification\n")
return
}
call gargtok (tok, token, SZ_LINE)
call strlwr (token)
if (token[1] == 'c') {
call cv_color (token[2], color)
if (color[1] == ERR)
return
} else if (tok == TOK_NUMBER) {
ip = 1
nchar = ctoi (token, ip, i)
if ( count <= 3) {
offsetdata[count] = i
count = count + 1
}
}
} until ( (color[1] != ERR) && (offsetdata[1] != ERR) &&
(tok == TOK_NEWLINE) )
offsetdata[count] = IDS_EOD # mark end
call cvoffset (color, offsetdata)
end
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