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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <syserr.h>
include "idb.h"
# IMPSTR -- Put an image header parameter of type string. If the named
# parameter is a standard parameter of type other than string, decode the
# string and set the binary value of the parameter. If the parameter is
# a nonstandard one we can do a simple string edit, since user parameters
# are stored in the user area in string form. The datatype of the parameter
# must be preserved by the edit, i.e., parameters of actual datatype string
# must be quoted and left justified and other parameters must be unquoted
# and right justified in the value field.
procedure impstr (im, key, value)
pointer im #I image descriptor
char key[ARB] #I parameter to be set
char value[ARB] #I new parameter value
bool string_valued
int nchars, ch, i
pointer rp, ip, op, sp, val, start, text, cmmt
int idb_putstring(), idb_findrecord(), idb_filstr()
errchk syserrs
begin
call smark (sp)
call salloc (val, SZ_LINE, TY_CHAR)
call salloc (text, SZ_LINE, TY_CHAR)
call salloc (cmmt, SZ_LINE, TY_CHAR)
# Filter the value string to remove any undesirable characters.
nchars = idb_filstr (value, Memc[text], SZ_LINE)
# Check for a standard header parameter first.
if (idb_putstring (im, key, Memc[text]) != ERR) {
call sfree (sp)
return
}
# Find the record.
if (idb_findrecord (im, key, rp) == 0)
call syserrs (SYS_IDBKEYNF, key)
# Determine the actual datatype of the parameter. String valued
# parameters will have an apostrophe in the first nonblank column
# of the value field. Skip the value and treat the rest of
# the line as a comment to be preserved.
string_valued = false
for (ip=IDB_STARTVALUE; ip <= IDB_ENDVALUE; ip=ip+1) {
# Skip leading whitespace.
for (; Memc[rp+ip-1] == ' '; ip=ip+1)
;
if (Memc[rp+ip-1] == '\'') {
# Skip string value.
do i = ip, IDB_RECLEN {
ch = Memc[rp+i]
if (ch == '\n')
break
Memc[rp+i] = ' '
if (ch == '\'')
break
}
string_valued = true
break
} else {
# Skip numeric value.
do i = ip, IDB_RECLEN {
ch = Memc[rp+i-1]
if (ch == '\n' || ch == ' ' || ch == '/')
break
Memc[rp+i-1] = ' '
}
break
}
}
# Skip whitespace before any comment.
for (ip = i; Memc[rp+ip-1] == ' '; ip=ip+1)
;
# Save comment. Include a leading space and add a / if missing.
Memc[cmmt] = ' '
for (i = 1; Memc[rp+ip-1] != '\n'; ip=ip+1) {
if (i == 1 && Memc[rp+ip-1] != '/') {
Memc[cmmt+i] = '/'
i = i + 1
}
Memc[cmmt+i] = Memc[rp+ip-1]
Memc[rp+ip-1] = ' '
i = i + 1
}
Memc[cmmt+i] = EOS
# Encode the new value of the parameter.
if (string_valued) {
call sprintf (Memc[val], SZ_LINE, " '%-0.68s%11t'%22t%-0.68s")
call pargstr (Memc[text])
call pargstr (Memc[cmmt])
} else {
call sprintf (Memc[val], SZ_LINE, "%21s%-0.68s")
call pargstr (Memc[text])
call pargstr (Memc[cmmt])
}
# Update the parameter value.
op = rp + IDB_STARTVALUE - 1
start = op
for (ip=val; Memc[ip] != EOS && Memc[op] != '\n'; ip=ip+1) {
Memc[op] = Memc[ip]
op = op + 1
}
call sfree (sp)
end
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