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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <ctype.h>
include <chars.h>
# CTOWRD -- Break whitespace delimited token or quoted string out of input
# stream. If string, process escape sequences. The number of characters
# converted from the input string, excluding whitespace, is returned as the
# function value.
int procedure ctowrd (str, ip, outstr, maxch)
char str[ARB] # input string
int ip # pointer into input string
char outstr[ARB] # receives extracted word
int maxch
char cch
int ch, junk, op
int ip_start, delim, i
define qsput_ 91
define wsput_ 92
int cctoc()
begin
while (IS_WHITE(str[ip]))
ip = ip + 1
ip_start = ip
delim = str[ip]
if (delim == DQUOTE || delim == SQUOTE) {
# Extract a quoted string.
op = 1
ip = ip + 1
do i = 1, ARB {
ch = str[ip]
if (ch == EOS) {
break
} else if (ch == ESCAPE) {
ch = str[ip+1]
if (ch == delim) {
ip = ip + 2
goto qsput_
} else {
junk = cctoc (str, ip, cch)
ch = cch
goto qsput_
}
} else if (ch == delim) {
ip = ip + 1
break
} else {
ip = ip + 1
qsput_ if (op <= maxch) {
outstr[op] = ch
op = op + 1
}
}
}
} else {
# Extract a whitespace delimited string.
op = 1
do i = 1, ARB {
ch = str[ip]
if (IS_WHITE(ch) || ch == '\n' || ch == EOS) {
break
} else if (ch == ESCAPE) {
junk = cctoc (str, ip, cch)
ch = cch
goto wsput_
} else {
ip = ip + 1
wsput_ if (op <= maxch) {
outstr[op] = ch
op = op + 1
}
}
}
}
outstr[op] = EOS
return (ip - ip_start)
end
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