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rpc_util.c

/* @(#)rpc_util.c 2.1 88/08/01 4.0 RPCSRC */
/*
 * 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
 */
#ifndef lint
/*static char sccsid[] = "from: @(#)rpc_util.c 1.5 87/06/24 (C) 1987 SMI";*/
static char rcsid[] = "$Id: rpc_util.c,v 1.2 1998/05/12 03:58:46 riley Exp $";
#endif

/*
 * rpc_util.c, Utility routines for the RPC protocol compiler 
 * Copyright (C) 1987, Sun Microsystems, Inc. 
 */
#include <stdio.h>
#include "rpc_scan.h"
#include "rpc_parse.h"
#include "rpc_util.h"

#include <stdio.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#else
#include <string.h>
#endif
#include <stdlib.h>

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

char *infilename; /* input filename */

#define NFILES 4
char *outfiles[NFILES]; /* output file names */
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 crash();

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

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

/*
 * find a value in a list 
 */
char *
findval(lst, val, cmp)
      list *lst;
      char *val;
      int (*cmp) ();

{
      for (; lst != NULL; lst = lst->next) {
            if ((*cmp) (lst->val, val)) {
                  return (lst->val);
            }
      }
      return (NULL);
}

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

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


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


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

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

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

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

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

      for (;;) {
            switch (rel) {
            case REL_VECTOR:
                  return (!streq(type, "string"));
            case REL_ARRAY:
            case REL_ARRAY2:
                  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;
            }
      }
}


static char *
locase(str)
      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(pname, vnum)
      char *pname;
      char *vnum;
{
      f_print(fout, "%s_%s", locase(pname), vnum);
}


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

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

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


void
record_open(file)
      char *file;
{
      if (nfiles < NFILES) {
            outfiles[nfiles++] = file;
      } else {
            f_print(stderr, "too many files!\n");
            crash();
      }
}

static char expectbuf[100];
static char *toktostr();

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

/*
 * error, token encountered was not one of two expected ones 
 */
void
expected2(exp1, exp2)
      tok_kind exp1, 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(exp1, exp2, exp3)
      tok_kind exp1, exp2, exp3;
{
      s_print(expectbuf, "expected '%s', '%s' or '%s'",
            toktostr(exp1),
            toktostr(exp2),
            toktostr(exp3));
      error(expectbuf);
}

void
tabify(f, tab)
      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 char *
toktostr(kind)
      tok_kind kind;
{
      token *sp;

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



static void
printbuf()
{
      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()
{
      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);
}

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