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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
define BIGSET 10
define SZ_ASCII 128
# STRIDXS -- Return the index of the first occurrence of any of a set of
# characters in a string.
int procedure stridxs (set, str)
char set[ARB] # set of characters to be searched for
char str[ARB] # string to be searched
int setlen, ip, i
char ch, lut[SZ_ASCII]
int strlen()
begin
setlen = strlen (set)
if (setlen > BIGSET) {
# Encode the set in a lookup table.
call aclrc (lut, SZ_ASCII)
do i = 1, setlen
lut[set[i]] = 1
# Search the string.
for (ip=1; str[ip] != EOS; ip=ip+1)
if (lut[str[ip]] != 0)
return (ip)
} else {
# Set is too small to be worth using a lookup table.
for (ip=1; str[ip] != EOS; ip=ip+1) {
ch = str[ip]
do i = 1, setlen
if (ch == set[i])
return (ip)
}
}
return (0)
end
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