/*
 * 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);
}
