/* @(#)rpc_scan.c 2.1 88/08/01 4.0 RPCSRC */
/*
* Copyright (c) 1995, 1996, 1998, 1999 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
*
* This file is part of Flick, the Flexible IDL Compiler Kit.
*
* Flick is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Flick is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Flick; see the file COPYING. If not, write to
* the Free Software Foundation, 59 Temple Place #330, Boston, MA 02111, USA.
*/
/*
* 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
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)rpc_scan.c 1.6 87/06/24 (C) 1987 SMI";
#endif
#endif
/*
* rpc_scan.c, Scanner for the RPC protocol compiler
* Copyright (C) 1987, Sun Microsystems, Inc.
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <mom/aoi.h>
#include <mom/libmeta.h>
#include <mom/compiler.h>
#include "rpc_scan.h"
#include "rpc_util.h"
#define startcomment(where) (where[0] == '/' && where[1] == '*')
#define endcomment(where) (where[-1] == '*' && where[0] == '/')
static void unget_token(token *tokp);
static void findstrconst(char **str, char **val);
static void findconst(char **str, char **val);
static void findkind(char **mark, token *tokp);
static int cppline(char *line);
static int directive(char *line);
static void printdirective(char *line);
static void docppline(char *line, int *lineno, char **fname);
extern io_file_index root_file;
extern io_file_index current_i_file;
extern const char *root_filename;
extern aoi outaoi;
static int pushed = 0; /* is a token pushed */
static token lasttok; /* last token, if pushed */
/*
* scan expecting 1 given token
*/
void
scan(
tok_kind expect,
token *tokp)
{
get_token(tokp);
if (tokp->kind != expect) {
expected1(expect);
}
}
/*
* scan expecting 2 given tokens
*/
void
scan2(
tok_kind expect1,
tok_kind expect2,
token *tokp)
{
get_token(tokp);
if (tokp->kind != expect1 && tokp->kind != expect2) {
expected2(expect1, expect2);
}
}
/*
* scan expecting 3 given token
*/
void
scan3(
tok_kind expect1,
tok_kind expect2,
tok_kind expect3,
token *tokp)
{
get_token(tokp);
if (tokp->kind != expect1 && tokp->kind != expect2
&& tokp->kind != expect3) {
expected3(expect1, expect2, expect3);
}
}
/*
* scan expecting a constant, possibly symbolic
*/
void
scan_num(
token *tokp)
{
get_token(tokp);
switch (tokp->kind) {
case TOK_IDENT:
break;
default:
error("constant or identifier expected");
}
}
/*
* Peek at the next token
*/
void
peek(
token *tokp)
{
get_token(tokp);
unget_token(tokp);
}
/*
* Peek at the next token and scan it if it matches what you expect
*/
int
peekscan(
tok_kind expect,
token *tokp)
{
peek(tokp);
if (tokp->kind == expect) {
get_token(tokp);
return (1);
}
return (0);
}
/*
* Get the next token, printing out any directive that are encountered.
*/
void
get_token(
token *tokp)
{
int commenting;
if (pushed) {
pushed = 0;
*tokp = lasttok;
return;
}
commenting = 0;
for (;;) {
if (*where == 0) {
for (;;) {
if (!fgets(curline, MAXLINESIZE, fin)) {
tokp->kind = TOK_EOF;
*where = 0;
return;
}
linenum++;
if (commenting) {
break;
} else if (cppline(curline)) {
docppline(curline, &linenum,
&infilename);
} else if (directive(curline)) {
printdirective(curline);
} else {
break;
}
}
where = curline;
} else if (isspace(((int) *where))) {
while (isspace(((int) *where))) {
where++; /* eat */
}
} else if (commenting) {
where++;
if (endcomment(where)) {
where++;
commenting--;
}
} else if (startcomment(where)) {
where += 2;
commenting++;
} else {
break;
}
}
/*
* 'where' is not whitespace, comment or directive Must be a token!
*/
switch (*where) {
case ':':
tokp->kind = TOK_COLON;
where++;
break;
case ';':
tokp->kind = TOK_SEMICOLON;
where++;
break;
case ',':
tokp->kind = TOK_COMMA;
where++;
break;
case '=':
tokp->kind = TOK_EQUAL;
where++;
break;
case '*':
tokp->kind = TOK_STAR;
where++;
break;
case '[':
tokp->kind = TOK_LBRACKET;
where++;
break;
case ']':
tokp->kind = TOK_RBRACKET;
where++;
break;
case '{':
tokp->kind = TOK_LBRACE;
where++;
break;
case '}':
tokp->kind = TOK_RBRACE;
where++;
break;
case '(':
tokp->kind = TOK_LPAREN;
where++;
break;
case ')':
tokp->kind = TOK_RPAREN;
where++;
break;
case '<':
tokp->kind = TOK_LANGLE;
where++;
break;
case '>':
tokp->kind = TOK_RANGLE;
where++;
break;
case '"':
tokp->kind = TOK_STRCONST;
findstrconst(&where, &tokp->str);
break;
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
tokp->kind = TOK_IDENT;
findconst(&where, &tokp->str);
break;
default:
if (!(isalpha(((int) *where)) || *where == '_')) {
char buf[100];
char *p;
s_print(buf, "illegal character in file: ");
p = buf + strlen(buf);
if (isprint(((int) *where))) {
s_print(p, "%c", *where);
} else {
s_print(p, "%d", *where);
}
error(buf);
}
findkind(&where, tokp);
break;
}
}
static void
unget_token(
token *tokp)
{
lasttok = *tokp;
pushed = 1;
}
static void
findstrconst(
char **str,
char **val)
{
char *p;
int size;
p = *str;
do {
(void) *p++;
} while (*p && *p != '"');
if (*p == 0) {
error("unterminated string constant");
}
p++;
size = p - *str;
*val = alloc(size + 1);
(void) strncpy(*val, *str, size);
(*val)[size] = 0;
*str = p;
}
static void
findconst(
char **str,
char **val)
{
char *p;
int size;
p = *str;
if (*p == '0' && *(p + 1) == 'x') {
p++;
do {
p++;
} while (isxdigit(((int) *p)));
} else {
do {
p++;
} while (isdigit(((int) *p)));
}
size = p - *str;
*val = alloc(size + 1);
(void) strncpy(*val, *str, size);
(*val)[size] = 0;
*str = p;
}
static token symbols[] = {
{TOK_CONST, "const"},
{TOK_UNION, "union"},
{TOK_SWITCH, "switch"},
{TOK_CASE, "case"},
{TOK_DEFAULT, "default"},
{TOK_STRUCT, "struct"},
{TOK_TYPEDEF, "typedef"},
{TOK_ENUM, "enum"},
{TOK_OPAQUE, "opaque"},
{TOK_BOOL, "bool"},
{TOK_VOID, "void"},
{TOK_CHAR, "char"},
{TOK_INT, "int"},
{TOK_UNSIGNED, "unsigned"},
{TOK_SHORT, "short"},
{TOK_LONG, "long"},
{TOK_FLOAT, "float"},
{TOK_DOUBLE, "double"},
{TOK_STRING, "string"},
{TOK_PROGRAM, "program"},
{TOK_VERSION, "version"},
{TOK_EOF, "??????"},
};
static void
findkind(
char **mark,
token *tokp)
{
int len;
token *s;
char *str;
str = *mark;
for (s = symbols; s->kind != TOK_EOF; s++) {
len = strlen(s->str);
if (strncmp(str, s->str, len) == 0) {
if (!isalnum(((int) str[len])) && str[len] != '_') {
tokp->kind = s->kind;
tokp->str = s->str;
*mark = str + len;
return;
}
}
}
tokp->kind = TOK_IDENT;
for (len = 0; isalnum(((int) str[len])) || str[len] == '_'; len++);
tokp->str = alloc(len + 1);
(void) strncpy(tokp->str, str, len);
tokp->str[len] = 0;
*mark = str + len;
}
static int
cppline(
char *line)
{
return (line == curline && *line == '#');
}
static int
directive(
char *line)
{
return (line == curline && *line == '%');
}
static void
printdirective(
char *line)
{
f_print(fout, "%s", line + 1);
}
static void
docppline(
char *line,
int *lineno,
char **fname)
{
io_file_index last_i_file = current_i_file;
int num;
char *filename_start;
char *filename_end;
char *file;
/* Skip over the the initial `#' and subsequent whitespace. */
line++;
while (isspace(((int) *line))) {
line++;
}
/* Skip over the (optional) token `line' and subsequent whitespace. */
if (!strncmp(line, "line", (sizeof("line") - 1))) {
line += sizeof("line") - 1; /* `sizeof' counts final NUL. */
while (isspace(((int) *line))) {
line++;
}
}
/* If we're not at a number (e.g., this is a `pragma'), bail. */
if (!isdigit(((int) *line)))
return;
/* Parse the line number and subsequent filename. */
num = atoi(line);
while (isdigit(((int) *line))) {
line++;
}
while (isspace(((int) *line))) {
line++;
}
for (filename_start = 0; *line; ++line) {
if (*line == '\"') {
filename_start = line + 1;
break;
}
}
if (filename_start) {
line = filename_start;
for (filename_end = 0; *line; ++line) {
if (*line == '\"') {
filename_end = line;
break;
}
}
} else
/* Avoid (bogus) warning from gcc 2.8.0 about uninit'ed use. */
filename_end = 0;
if (filename_start && filename_end) {
file = alloc((filename_end - filename_start + 1)
* sizeof(char));
strncpy(file,
filename_start,
(filename_end - filename_start));
file[filename_end - filename_start] = 0;
} else
file = 0;
/* Update our scanner state. */
if (!file) {
/* No filename found? Then don't update `fname'. */
} else if (*file == 0) {
*fname = "<stdin>";
/*
* *fname = NULL;
*
* The original code NULL'ed the filename, but doing so can
* cause error() in `rpc_util.c' to crash when it sends the
* NULL pointer to f_print().
*/
} else {
*fname = file;
}
/*
* Since the root filename was purged of its path, we have to make sure
* that we don't try to add the full-path version. Also, if the root
* file includes another file in the same directory or a subdirectory,
* then we strip off the pathname of that file, too.
*
* XXX - This isn't the whole solution. If the root file includes a
* file relative to the parent directory (".."), then the preprocessor
* may give us only the exact path of the file, not the relative path.
* What we really want is the text inside the #include directive,
* rather than exact paths, perhaps with additional information as to
* which are system files and user files (e.g. whether included with <>
* or ""). Unfortunately, the preprocessor does away with the #include
* lines, and only gives us a relative or full pathname, although gcc
* is at least gracious enough to also indicate system include files.
*/
if (strcmp(*fname, root_filename) != 0) {
const char *root_dir = dir_part(root_filename);
int dir_len = strlen(root_dir);
if ((dir_len > 0)
&& (strncmp(*fname, root_dir, dir_len) == 0)) {
current_i_file = meta_add_file(&outaoi.meta_data,
*fname + dir_len + 1,
IO_FILE_INPUT);
} else {
current_i_file = meta_add_file(&outaoi.meta_data,
*fname,
IO_FILE_INPUT);
}
} else {
current_i_file = root_file;
}
line++;
for( ; *line && ((*line == ' ') || (*line == '\t')); ++line );
if( *line && isdigit((int)*line) ) {
int flag;
flag = atoi(line);
switch( flag ) {
case 1:
break;
case 2:
meta_include_file(&outaoi.meta_data,
current_i_file,
last_i_file);
break;
default:
break;
}
}
*lineno = num - 1;
}
/* End of file. */
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