/*
 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
 * unrestricted use provided that this legend is included on all tape
 * media and as a part of the software program in whole or part.  Users
 * may copy or modify Sun RPC without charge, but are not authorized
 * to license or distribute it to anyone else except as part of a product or
 * program developed by the user.
 *
 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
 *
 * Sun RPC is provided with no support and without any obligation on the
 * part of Sun Microsystems, Inc. to assist in its use, correction,
 * modification or enhancement.
 *
 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
 * OR ANY PART THEREOF.
 *
 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
 * or profits or other special, indirect and consequential damages, even if
 * Sun has been advised of the possibility of such damages.
 *
 * Sun Microsystems, Inc.
 * 2550 Garcia Avenue
 * Mountain View, California  94043
 */

/*
 * rpc_util.c, Utility routines for the RPC protocol compiler
 * Copyright (C) 1989, Sun Microsystems, Inc.
 */
#include <err.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "rpc_parse.h"
#include "rpc_scan.h"
#include "rpc_util.h"

#define ARGEXT "argument"

char curline[MAXLINESIZE];      /* current read line */
char *where = curline;          /* current point in line */
int linenum = 0;                /* current line number */

const char *infilename;         /* input filename */

#define NFILES   7
static const char *outfiles[NFILES]; /* output file names */
static int nfiles;

FILE *fout;                     /* file pointer of current output */
FILE *fin;                      /* file pointer of current input */

list *defined;                  /* list of defined things */

static void printwhere( void );

/*
 * Reinitialize the world
 */
void
reinitialize(void)
{
        memset(curline, 0, MAXLINESIZE);
        where = curline;
        linenum = 0;
        defined = NULL;
}

/*
 * string equality
 */
int
streq(const char *a, const char *b)
{
        return (strcmp(a, b) == 0);
}

/*
 * find a value in a list
 */
definition *
findval(list *lst, const char *val, int (*cmp)(definition *, const char *))
{
        for (; lst != NULL; lst = lst->next) {
                if ((*cmp) (lst->val, val)) {
                        return (lst->val);
                }
        }
        return (NULL);
}

/*
 * store a value in a list
 */
void
storeval(list **lstp, definition *val)
{
        list **l;
        list *lst;

        for (l = lstp; *l != NULL; l = (list **) & (*l)->next);
        lst = XALLOC(list);
        lst->val = val;
        lst->next = NULL;
        *l = lst;
}

static int
findit(definition *def, const char *type)
{
        return (streq(def->def_name, type));
}

static const char *
fixit(const char *type, const char *orig)
{
        definition *def;

        def = (definition *) FINDVAL(defined, type, findit);
        if (def == NULL || def->def_kind != DEF_TYPEDEF) {
                return (orig);
        }
        switch (def->def.ty.rel) {
        case REL_VECTOR:
                if (streq(def->def.ty.old_type, "opaque"))
                        return ("char");
                else
                        return (def->def.ty.old_type);

        case REL_ALIAS:
                return (fixit(def->def.ty.old_type, orig));
        default:
                return (orig);
        }
}

const char *
fixtype(const char *type)
{
        return (fixit(type, type));
}

const char *
stringfix(const char *type)
{
        if (streq(type, "string")) {
                return ("wrapstring");
        } else {
                return (type);
        }
}

void
ptype(const char *prefix, const char *type, int follow)
{
        if (prefix != NULL) {
                if (streq(prefix, "enum")) {
                        f_print(fout, "enum ");
                } else {
                        f_print(fout, "struct ");
                }
        }
        if (streq(type, "bool")) {
                f_print(fout, "bool_t ");
        } else if (streq(type, "string")) {
                f_print(fout, "char *");
        } else {
                f_print(fout, "%s ", follow ? fixtype(type) : type);
        }
}

static int
typedefed(definition *def, const char *type)
{
        if (def->def_kind != DEF_TYPEDEF || def->def.ty.old_prefix != NULL) {
                return (0);
        } else {
                return (streq(def->def_name, type));
        }
}

int
isvectordef(const char *type, relation rel)
{
        definition *def;

        for (;;) {
                switch (rel) {
                case REL_VECTOR:
                        return (!streq(type, "string"));
                case REL_ARRAY:
                        return (0);
                case REL_POINTER:
                        return (0);
                case REL_ALIAS:
                        def = (definition *) FINDVAL(defined, type, typedefed);
                        if (def == NULL) {
                                return (0);
                        }
                        type = def->def.ty.old_type;
                        rel = def->def.ty.rel;
                }
        }

        return (0);
}

char *
locase(const char *str)
{
        char c;
        static char buf[100];
        char *p = buf;

        while ( (c = *str++) ) {
                *p++ = (c >= 'A' && c <= 'Z') ? (c - 'A' + 'a') : c;
        }
        *p = 0;
        return (buf);
}

void
pvname_svc(const char *pname, const char *vnum)
{
        f_print(fout, "%s_%s_svc", locase(pname), vnum);
}

void
pvname(const char *pname, const char *vnum)
{
        f_print(fout, "%s_%s", locase(pname), vnum);
}

/*
 * print a useful (?) error message, and then die
 */
void
error(const char *msg)
{
        printwhere();
        warnx("%s, line %d: %s", infilename, linenum, msg);
        crash();
}

/*
 * Something went wrong, unlink any files that we may have created and then
 * die.
 */
void __dead2
crash(void)
{
        int i;

        for (i = 0; i < nfiles; i++) {
                (void) unlink(outfiles[i]);
        }
        exit(1);
}

void
record_open(const char *file)
{
        if (nfiles < NFILES) {
                outfiles[nfiles++] = file;
        } else {
                warnx("too many files");
                crash();
        }
}

static char expectbuf[100];
static const char *toktostr(tok_kind kind);

/*
 * error, token encountered was not the expected one
 */
void
expected1(tok_kind exp1)
{
        s_print(expectbuf, "expected '%s'",
                toktostr(exp1));
        error(expectbuf);
}

/*
 * error, token encountered was not one of two expected ones
 */
void
expected2(tok_kind exp1, tok_kind exp2)
{
        s_print(expectbuf, "expected '%s' or '%s'",
                toktostr(exp1),
                toktostr(exp2));
        error(expectbuf);
}

/*
 * error, token encountered was not one of 3 expected ones
 */
void
expected3(tok_kind exp1, tok_kind exp2, tok_kind exp3)
{
        s_print(expectbuf, "expected '%s', '%s' or '%s'",
                toktostr(exp1),
                toktostr(exp2),
                toktostr(exp3));
        error(expectbuf);
}

void
tabify(FILE *f, int tab)
{
        while (tab--) {
                (void) fputc('\t', f);
        }
}


static token tokstrings[] = {
                        {TOK_IDENT, "identifier"},
                        {TOK_CONST, "const"},
                        {TOK_RPAREN, ")"},
                        {TOK_LPAREN, "("},
                        {TOK_RBRACE, "}"},
                        {TOK_LBRACE, "{"},
                        {TOK_LBRACKET, "["},
                        {TOK_RBRACKET, "]"},
                        {TOK_STAR, "*"},
                        {TOK_COMMA, ","},
                        {TOK_EQUAL, "="},
                        {TOK_COLON, ":"},
                        {TOK_SEMICOLON, ";"},
                        {TOK_UNION, "union"},
                        {TOK_STRUCT, "struct"},
                        {TOK_SWITCH, "switch"},
                        {TOK_CASE, "case"},
                        {TOK_DEFAULT, "default"},
                        {TOK_ENUM, "enum"},
                        {TOK_TYPEDEF, "typedef"},
                        {TOK_INT, "int"},
                        {TOK_SHORT, "short"},
                        {TOK_LONG, "long"},
                        {TOK_UNSIGNED, "unsigned"},
                        {TOK_DOUBLE, "double"},
                        {TOK_FLOAT, "float"},
                        {TOK_CHAR, "char"},
                        {TOK_STRING, "string"},
                        {TOK_OPAQUE, "opaque"},
                        {TOK_BOOL, "bool"},
                        {TOK_VOID, "void"},
                        {TOK_PROGRAM, "program"},
                        {TOK_VERSION, "version"},
                        {TOK_EOF, "??????"}
};

static const char *
toktostr(tok_kind kind)
{
        token *sp;

        for (sp = tokstrings; sp->kind != TOK_EOF && sp->kind != kind; sp++);
        return (sp->str);
}

static void
printbuf(void)
{
        char c;
        int i;
        int cnt;

#       define TABSIZE 4

        for (i = 0; (c = curline[i]); i++) {
                if (c == '\t') {
                        cnt = 8 - (i % TABSIZE);
                        c = ' ';
                } else {
                        cnt = 1;
                }
                while (cnt--) {
                        (void) fputc(c, stderr);
                }
        }
}

static void
printwhere(void)
{
        int i;
        char c;
        int cnt;

        printbuf();
        for (i = 0; i < where - curline; i++) {
                c = curline[i];
                if (c == '\t') {
                        cnt = 8 - (i % TABSIZE);
                } else {
                        cnt = 1;
                }
                while (cnt--) {
                        (void) fputc('^', stderr);
                }
        }
        (void) fputc('\n', stderr);
}

char *
make_argname(const char *pname, const char *vname)
{
        char *name;

        name = xmalloc(strlen(pname) + strlen(vname) + strlen(ARGEXT) + 3);
        sprintf(name, "%s_%s_%s", locase(pname), vname, ARGEXT);
        return (name);
}

bas_type *typ_list_h;
bas_type *typ_list_t;

void
add_type(int len, const char *type)
{
        bas_type *ptr;

        ptr = XALLOC(bas_type);

        ptr->name = type;
        ptr->length = len;
        ptr->next = NULL;
        if (typ_list_t == NULL)
        {

                typ_list_t = ptr;
                typ_list_h = ptr;
        }
        else
        {
                typ_list_t->next = ptr;
                typ_list_t = ptr;
        }
}


bas_type *
find_type(const char *type)
{
        bas_type * ptr;

        ptr = typ_list_h;
        while (ptr != NULL)
        {
                if (strcmp(ptr->name, type) == 0)
                        return (ptr);
                else
                        ptr = ptr->next;
        }
        return (NULL);
}

void *
xmalloc(size_t size)
{
        void *p;

        if ((p = malloc(size)) == NULL) {
                warnx("malloc failed");
                crash();
        }
        return (p);
}

void *
xrealloc(void *ptr, size_t size)
{
        void *p;

        if ((p = realloc(ptr, size)) == NULL) {
                warnx("realloc failed");
                crash();
        }
        return (p);
}

char *
xstrdup(const char *str)
{
        char *p;

        if ((p = strdup(str)) == NULL) {
                warnx("strdup failed");
                crash();
        }
        return (p);
}