conv_digit       3738 bignum.c       	else if ((c = conv_digit(c)) < 0 || c >= base) {
conv_digit       3788 bignum.c               if ((c = conv_digit(p[-1])) < 0)
conv_digit       3828 bignum.c               if ((c = conv_digit(*p)) < 0)
conv_digit       3886 bignum.c               if ((c = conv_digit(p[-1])) < 0)
conv_digit       3955 bignum.c               if (conv_digit(*q) < 0)
conv_digit       4139 bignum.c           c = conv_digit(c);