source: svn/trunk/mkstructinfo.awk @ 5

#!/usr/bin/awk -f
# vim:ts=4:sw=4
BEGIN {
    brace = 0;
    delete buffer;
    buffer_len = 0;
}
/^}.*;/ {
    if (instruct) {
        sub(";", "");
        if (instruct == 1 && $2) {
            instruct = $2;
        }
        if (instruct in typedefs) {
            instruct = typedefs[instruct];
        }
        elm = "";
        elms = "";
        for (i = 0; i in buffer; i ++) {
            if (i) elm = elm " + ";
            # elm = elm "sizeof(((`" instruct "'*)NULL)->`" buffer[i] "')";
            # elms = elms " `" buffer[i] "'";
            elm = elm "sizeof(((" instruct "*)NULL)->" buffer[i] ")";

            if (elms == "") {
                elms = buffer[i];
            }
            else {
                elms = elms "," buffer[i];
            }
        }
        printf "define(`ELEMENTSOF_%s', `%s')\n", instruct, elms;
        printf "define(`COUNTOF_%s', `%s')\n", instruct, i;
        printf "define(`SIZEOF_%s', `(  %s  )')\n", instruct, elm;
        print "\n";
        delete buffer;
        buffer_len = 0;
        instruct = 0;
    }
    next;
}

/.{/ {
    brace = brace + 1;
}
/.}/ {
    brace = brace - 1;
}

{
    if (brace == 1 && instruct) {
        sub(/.*[{}]/, "");
        gsub(/\[[^\]]+\]/, "");
        gsub(/:[0-9]+/, "");
        str = $0;
        if (match(str, /\([ ]*\*([^)]+)\)/, a)) {
            buffer[buffer_len] = a[1];
            buffer_len ++;
        }
        else {
            while (gsub(/(\([^)]*\))/, "", str)) {
            }
            while (match(str, /([^*() ]+)[ ]*[,;](.*)/, a)) {
                buffer[buffer_len] = a[1];
                buffer_len ++;
                str = a[2];
            }
        }
        next;
    }
}

/^typedef struct [^{]*;/ {
    sub(";", "");
    typedefs[$3] = $4;
    next;
}
/^typedef struct .*{/ {
    brace = 1;
    instruct = 1;
    next;
}

/^struct .*{/ {
    instruct = $2;
    brace = 1;
    next;
}