lib/dns/gen.c

	gen.c revision 611a37e72daff14666f7dcc781674775e0c8e5ea
/*
 * Copyright (C) 1998  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */

#include <sys/types.h>

#include <ctype.h>
#include <dirent.h>
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>


#define FROMTEXTDECL "dns_rdataclass_t class, dns_rdatatype_t type, isc_lex_t *lexer, dns_name_t *origin, isc_boolean_t downcase, isc_buffer_t *target"
#define FROMTEXTARGS "class, type, lexer, origin, downcase, target"
#define FROMTEXTCLASS "class"
#define FROMTEXTTYPE "type"
#define FROMTEXTDEF "DNS_R_DEFAULT"

#define TOTEXTDECL "dns_rdata_t *rdata, dns_name_t *origin, isc_buffer_t *target"
#define TOTEXTARGS "rdata, origin, target"
#define TOTEXTCLASS "rdata->class"
#define TOTEXTTYPE "rdata->type"
#define TOTEXTDEF "DNS_R_DEFAULT"

#define FROMWIREDECL "dns_rdataclass_t class, dns_rdatatype_t type, isc_buffer_t *source, dns_decompress_t *dctx, isc_boolean_t downcase, isc_buffer_t *target"
#define FROMWIREARGS "class, type, source, dctx, downcase, target"
#define FROMWIRECLASS "class"
#define FROMWIRETYPE "type"
#define FROMWIREDEF "DNS_R_DEFAULT"

#define TOWIREDECL "dns_rdata_t *rdata, dns_compress_t *cctx, isc_buffer_t *target"
#define TOWIREARGS "rdata, cctx, target"
#define TOWIRECLASS "rdata->class"
#define TOWIRETYPE "rdata->type"
#define TOWIREDEF "DNS_R_DEFAULT"

#define FROMSTRUCTDECL "dns_rdataclass_t class, dns_rdatatype_t type, void *source, isc_buffer_t *target"
#define FROMSTRUCTARGS "class, type, source, target"
#define FROMSTRUCTCLASS "class"
#define FROMSTRUCTTYPE "type"
#define FROMSTRUCTDEF "DNS_R_DEFAULT"

#define TOSTRUCTDECL "dns_rdata_t *rdata, void *target"
#define TOSTRUCTARGS "rdata, target"
#define TOSTRUCTCLASS "rdata->class"
#define TOSTRUCTTYPE "rdata->type"
#define TOSTRUCTDEF "DNS_R_DEFAULT"

#define COMPAREDECL "dns_rdata_t *rdata1, dns_rdata_t *rdata2"
#define COMPAREARGS "rdata1, rdata2"
#define COMPARECLASS "rdata1->class"
#define COMPARETYPE "rdata1->type"
#define COMPAREDEF "-2"

char copyright[] =
"/*\n\
 * Copyright (C) 1998%s Internet Software Consortium.\n\
 *\n\
 * Permission to use, copy, modify, and distribute this software for any\n\
 * purpose with or without fee is hereby granted, provided that the above\n\
 * copyright notice and this permission notice appear in all copies.\n\
 *\n\
 * THE SOFTWARE IS PROVIDED \"AS IS\" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\n\
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\n\
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\n\
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\n\
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\n\
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\n\
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\n\
 * SOFTWARE.\n\
 */\n\
\n\
 /* THIS FILE IS AUTOMATICALLY GENERATED: DO NOT EDIT */\n\
\n";

struct cc {
    struct cc *next;
    int type;
} *classes;

struct tt {
    struct tt *next;
    int class;
    int type;
    char classname[11];
    char typename[11];
    char dirname[sizeof "rdata/0123456789_65535" ];
} *types;

char *  upper(char *);
void    doswitch(char *, char *, char *, char *, char *, char *);
void    dodecl(char *, char *, char *);
void    add(int, char *, int, char *, char *);
void    sd(int, char *, char *);

char *
upper(char *s) {
    static char buf[11];
    char *b = buf;
    char c;

    while ((c = *s++)) {

        *b++ = islower(c) ? toupper(c) : c;
    }
    *b = '\0';
    return (buf);
}

void
doswitch(char *name, char *function, char *args,
     char *tsw, char *csw, char *res)
{
    struct tt *tt;
    int first = 1;
    int lasttype = 0;
    int subswitch = 0;

    for (tt = types; tt != NULL ; tt = tt->next) {
        if (first) {
            fprintf(stdout, "\n#define %s \\\n", name);
            fprintf(stdout, "\tswitch (%s) { \\\n" /*}*/, tsw);
            first = 0;
        }
        if (tt->type != lasttype && subswitch) {
            fprintf(stdout, "\t\tdefault: result = %s; \\\n",
                res);
            fputs(/*{*/ "\t\t} \\\n", stdout);
            fputs("\t\tbreak; \\\n", stdout);
            subswitch = 0;
        }
        if (tt->class && tt->type != lasttype) {
            fprintf(stdout, "\tcase %d: switch (%s) { \\\n" /*}*/,
                tt->type, csw);
            subswitch = 1;
        }
        if (tt->class == 0)
            fprintf(stdout,
                "\tcase %d: result = %s_%s(%s); break;",
                tt->type, function, tt->typename, args);
        else
            fprintf(stdout,
                    "\t\tcase %d: result = %s_%s_%s(%s); break;",
                tt->class, function, tt->classname,
                tt->typename, args);
        fputs(" \\\n", stdout);
        lasttype = tt->type;
    }
    if (subswitch) {
        fprintf(stdout, "\t\tdefault: result = %s; \\\n", res);
        fputs(/*{*/ "\t\t}\n", stdout);
        fputs("\t\tbreak; \\\n", stdout);
    }
    if (first)
        fprintf(stdout, "\n#define %s result = %s;\n", name, res);
    else {
        fprintf(stdout, "\tdefault: result = %s; \\\n", res);
        fputs(/*{*/ "\t}\n", stdout);
    }
}

void
dodecl(char *type, char *function, char *args) {
    struct tt *tt;

    fputs("\n", stdout);
    for (tt = types; tt ; tt = tt->next)
        if (tt->class)
            fprintf(stdout,
                "static %s %s_%s_%s(%s);\n",
                type, function, tt->classname,
                tt->typename, args);
        else
            fprintf(stdout,
                "static %s %s_%s(%s);\n",
                type, function, tt->typename, args);
}

void
add(int class, char *classname, int type, char *typename, char *dirname) {
    struct tt *newtt = (struct tt *)malloc(sizeof *newtt);
    struct tt *tt, *oldtt;
    struct cc *newcc;
    struct cc *cc, *oldcc;


    if (newtt == NULL)
        exit(1);

    newtt->next = NULL;
    newtt->class = class;
    newtt->type = type;
    strcpy(newtt->classname, classname);
    strcpy(newtt->typename, typename);
    strcpy(newtt->dirname, dirname);

    tt = types;
    oldtt = NULL;

    while (tt && (tt->type < type)) {
        oldtt = tt;
        tt = tt->next;
    }

    while (tt && (tt->type == type) && (tt->class < class)) {
        if (strcmp(tt->typename, typename) != 0)
            exit(1);
        oldtt = tt;
        tt = tt->next;
    }

    if (tt && (tt->type == type) && (tt->class == class))
        exit(1);

    newtt->next = tt;
    if (oldtt)
        oldtt->next = newtt;
    else
        types = newtt;

    /* do a class switch for this type */

    if (class == 0)
        return;

    newcc = (struct cc *)malloc(sizeof *newcc);
    newcc->type = type;
    cc = classes;
    oldcc = NULL;

    while (cc && (cc->type < type)) {
        oldcc = cc;
        cc = cc->next;
    }

    if (cc && cc->type == type) {
        free((char *)newcc);
        return;
    }

    newcc->next = cc;
    if (oldcc)
        oldcc->next = newcc;
    else
        classes = newcc;
}

void
sd(int class, char *classname, char *dir) {
    char buf[sizeof "0123456789_65535.h"];
    DIR *d;
    int type;
    char typename[11];
    struct dirent *dp;

    if ((d = opendir(dir)) == NULL)
        return;

    while ((dp = readdir(d)) != NULL) {
        if (sscanf(dp->d_name, "%10[0-9a-z]_%d.h",
               typename, &type) != 2)
            continue;
        if ((type > 65535) || (type < 0))
            continue;

        sprintf(buf, "%s_%d.h", typename, type);
        if (strcmp(buf, dp->d_name) != 0)
            continue;
        add(class, classname, type, typename, dir);
    }
    closedir(d);
}

int
main(int argc, char **argv) {
    DIR *d;
    char buf[sizeof "rdata/0123456789_65535" ];
    int class;
    char classname[11];
    struct dirent *dp;
    struct tt *tt;
    struct tm *tm;
    time_t now;
    char year[11];

    argc = argc;
    argv = argv;

    if ((d = opendir("rdata")) == NULL)
        exit(1);

    while ((dp = readdir(d)) != NULL) {
        if (sscanf(dp->d_name, "%10[0-9a-z]_%d",
               classname, &class) != 2)
            continue;
        if ((class > 65535) || (class < 0))
            continue;

        sprintf(buf, "rdata/%s_%d", classname, class);
        if (strcmp(buf + 6, dp->d_name) != 0)
            continue;
        sd(class, classname, buf);
    }
    sd(0, "", "rdata/generic");
    closedir(d);

    if (time(&now) != -1) {
        if ((tm = localtime(&now)) != NULL && tm->tm_year > 98)
            sprintf(year, "-%d", tm->tm_year + 1900);
        else
            year[0] = 0;
    } else
        year[0] = 0;

    fprintf(stdout, copyright, year);

    dodecl("dns_result_t", "fromtext", FROMTEXTDECL);
    dodecl("dns_result_t", "totext", TOTEXTDECL);
    dodecl("dns_result_t", "fromwire", FROMWIREDECL);
    dodecl("dns_result_t", "towire", TOWIREDECL);
    dodecl("int", "compare", COMPAREDECL);
    dodecl("dns_result_t", "fromstruct", FROMSTRUCTDECL);
    dodecl("dns_result_t", "tostruct", TOSTRUCTDECL);

    doswitch("FROMTEXTSWITCH", "fromtext", FROMTEXTARGS,
         FROMTEXTTYPE, FROMTEXTCLASS, FROMTEXTDEF);
    doswitch("TOTEXTSWITCH", "totext", TOTEXTARGS,
         TOTEXTTYPE, TOTEXTCLASS, TOTEXTDEF);
    doswitch("FROMWIRESWITCH", "fromwire", FROMWIREARGS,
         FROMWIRETYPE, FROMWIRECLASS, FROMWIREDEF);
    doswitch("TOWIRESWITCH", "towire", TOWIREARGS,
         TOWIRETYPE, TOWIRECLASS, TOWIREDEF);
    doswitch("COMPARESWITCH", "compare", COMPAREARGS,
          COMPARETYPE, COMPARECLASS, COMPAREDEF);
    doswitch("FROMSTRUCTSWITCH", "fromstruct", FROMSTRUCTARGS,
          FROMSTRUCTTYPE, FROMSTRUCTCLASS, FROMSTRUCTDEF);
    doswitch("TOSTRUCTSWITCH", "tostruct", TOSTRUCTARGS,
          TOSTRUCTTYPE, TOSTRUCTCLASS, TOSTRUCTDEF);

    fprintf(stdout, "\n#define TYPENAMES%s\n",
        types != NULL ? " \\" : "");
    for (tt = types; tt != NULL ; tt = tt->next)
        if (tt->class == 0)
            fprintf(stdout,
                "\t{ %d, \"%s\" },%s\n",
                tt->type, tt->typename,
                tt->next != NULL ? " \\" : "");

    fputs("\n", stdout);
    for (tt = types; tt ; tt = tt->next)
        fprintf(stdout, "#include \"%s/%s_%d.h\"\n",
            tt->dirname, tt->typename, tt->type);

    if (ferror(stdout) != 0)
        exit(1);

    exit(0);
}