477 lines
8.3 KiB
C
477 lines
8.3 KiB
C
/* @(#)rpc_scan.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_scan.c 1.6 87/06/24 (C) 1987 SMI";*/
|
|
static char rcsid[] = "$Id: rpc_scan.c,v 1.1 1993/09/13 23:20:18 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* rpc_scan.c, Scanner for the RPC protocol compiler
|
|
* Copyright (C) 1987, Sun Microsystems, Inc.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <strings.h>
|
|
#include "rpc_scan.h"
|
|
#include "rpc_util.h"
|
|
|
|
#define startcomment(where) (where[0] == '/' && where[1] == '*')
|
|
#define endcomment(where) (where[-1] == '*' && where[0] == '/')
|
|
|
|
static int pushed = 0; /* is a token pushed */
|
|
static token lasttok; /* last token, if pushed */
|
|
|
|
static int unget_token(), findstrconst(), findconst(), findkind(), cppline(),
|
|
directive(), printdirective(), docppline();
|
|
/*
|
|
* scan expecting 1 given token
|
|
*/
|
|
void
|
|
scan(expect, tokp)
|
|
tok_kind expect;
|
|
token *tokp;
|
|
{
|
|
get_token(tokp);
|
|
if (tokp->kind != expect) {
|
|
expected1(expect);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* scan expecting 2 given tokens
|
|
*/
|
|
void
|
|
scan2(expect1, expect2, tokp)
|
|
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(expect1, expect2, expect3, tokp)
|
|
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(tokp)
|
|
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(tokp)
|
|
token *tokp;
|
|
{
|
|
get_token(tokp);
|
|
unget_token(tokp);
|
|
}
|
|
|
|
|
|
/*
|
|
* Peek at the next token and scan it if it matches what you expect
|
|
*/
|
|
int
|
|
peekscan(expect, tokp)
|
|
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(tokp)
|
|
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(*where)) {
|
|
while (isspace(*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(*where) || *where == '_')) {
|
|
char buf[100];
|
|
char *p;
|
|
|
|
s_print(buf, "illegal character in file: ");
|
|
p = buf + strlen(buf);
|
|
if (isprint(*where)) {
|
|
s_print(p, "%c", *where);
|
|
} else {
|
|
s_print(p, "%d", *where);
|
|
}
|
|
error(buf);
|
|
}
|
|
findkind(&where, tokp);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
static
|
|
unget_token(tokp)
|
|
token *tokp;
|
|
{
|
|
lasttok = *tokp;
|
|
pushed = 1;
|
|
}
|
|
|
|
|
|
static
|
|
findstrconst(str, val)
|
|
char **str;
|
|
char **val;
|
|
{
|
|
char *p;
|
|
int size;
|
|
|
|
p = *str;
|
|
do {
|
|
*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
|
|
findconst(str, val)
|
|
char **str;
|
|
char **val;
|
|
{
|
|
char *p;
|
|
int size;
|
|
|
|
p = *str;
|
|
if (*p == '0' && *(p + 1) == 'x') {
|
|
p++;
|
|
do {
|
|
p++;
|
|
} while (isxdigit(*p));
|
|
} else {
|
|
do {
|
|
p++;
|
|
} while (isdigit(*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
|
|
findkind(mark, tokp)
|
|
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(str[len]) && str[len] != '_') {
|
|
tokp->kind = s->kind;
|
|
tokp->str = s->str;
|
|
*mark = str + len;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
tokp->kind = TOK_IDENT;
|
|
for (len = 0; isalnum(str[len]) || str[len] == '_'; len++);
|
|
tokp->str = alloc(len + 1);
|
|
(void) strncpy(tokp->str, str, len);
|
|
tokp->str[len] = 0;
|
|
*mark = str + len;
|
|
}
|
|
|
|
static
|
|
cppline(line)
|
|
char *line;
|
|
{
|
|
return (line == curline && *line == '#');
|
|
}
|
|
|
|
static
|
|
directive(line)
|
|
char *line;
|
|
{
|
|
return (line == curline && *line == '%');
|
|
}
|
|
|
|
static
|
|
printdirective(line)
|
|
char *line;
|
|
{
|
|
f_print(fout, "%s", line + 1);
|
|
}
|
|
|
|
static
|
|
docppline(line, lineno, fname)
|
|
char *line;
|
|
int *lineno;
|
|
char **fname;
|
|
{
|
|
char *file;
|
|
int num;
|
|
char *p;
|
|
|
|
line++;
|
|
while (isspace(*line)) {
|
|
line++;
|
|
}
|
|
num = atoi(line);
|
|
while (isdigit(*line)) {
|
|
line++;
|
|
}
|
|
while (isspace(*line)) {
|
|
line++;
|
|
}
|
|
if (*line != '"') {
|
|
error("preprocessor error");
|
|
}
|
|
line++;
|
|
p = file = alloc(strlen(line) + 1);
|
|
while (*line && *line != '"') {
|
|
*p++ = *line++;
|
|
}
|
|
if (*line == 0) {
|
|
error("preprocessor error");
|
|
}
|
|
*p = 0;
|
|
if (*file == 0) {
|
|
*fname = NULL;
|
|
} else {
|
|
*fname = file;
|
|
}
|
|
*lineno = num - 1;
|
|
}
|