File: [local] / src / usr.bin / rpcgen / rpc_scan.c (download)
Revision 1.19, Fri Jan 15 10:14:32 2016 UTC (8 years, 4 months ago) by jasper
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, OPENBSD_7_2_BASE, OPENBSD_7_2, OPENBSD_7_1_BASE, OPENBSD_7_1, OPENBSD_7_0_BASE, OPENBSD_7_0, OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6, OPENBSD_6_5_BASE, OPENBSD_6_5, OPENBSD_6_4_BASE, OPENBSD_6_4, OPENBSD_6_3_BASE, OPENBSD_6_3, OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9, HEAD Changes since 1.18: +3 -1 lines
Add support for parsing 'hyper' and 'quad' types, as per RFC4506.
From FreeBSD
ok millert@
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/* $OpenBSD: rpc_scan.c,v 1.19 2016/01/15 10:14:32 jasper Exp $ */
/* $NetBSD: rpc_scan.c,v 1.4 1995/06/11 21:50:02 pk Exp $ */
/*
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
* * Neither the name of the "Oracle America, Inc." nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* rpc_scan.c, Scanner for the RPC protocol compiler
*/
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "rpc_scan.h"
#include "rpc_parse.h"
#include "rpc_util.h"
static void unget_token(token *tokp);
static void findstrconst(char **, char **);
static void findchrconst(char **, char **);
static void findconst(char **, char **);
static void findkind(char **, token *);
static int cppline(char *);
static int directive(char *);
static void printdirective(char *);
static void docppline(char *, int *, char **);
#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 */
/*
* 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 any of the 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 any of the 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((unsigned char)*where)) {
while (isspace((unsigned char)*where)) {
where++; /* eat */
}
} else if (commenting) {
for (where++; *where; where++) {
if (endcomment(where)) {
where++;
commenting--;
break;
}
}
} 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 '\'':
tokp->kind = TOK_CHARCONST;
findchrconst(&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((unsigned char)*where) || *where == '_')) {
char buf[100], chs[20];
if (isprint((unsigned char)*where)) {
snprintf(chs, sizeof chs, "%c", *where);
} else {
snprintf(chs, sizeof chs, "%d", *where);
}
snprintf(buf, sizeof buf,
"illegal character in file: %s", chs);
error(buf);
}
findkind(&where, tokp);
break;
}
}
static void
unget_token(tokp)
token *tokp;
{
lasttok = *tokp;
pushed = 1;
}
static void
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 = malloc(size + 1);
if (val == NULL)
error("alloc failed");
(void) strncpy(*val, *str, size);
(*val)[size] = 0;
*str = p;
}
static void
findchrconst(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;
if (size != 3) {
error("empty char string");
}
*val = malloc(size + 1);
if (val == NULL)
error("alloc failed");
(void) strncpy(*val, *str, size);
(*val)[size] = 0;
*str = p;
}
static void
findconst(str, val)
char **str;
char **val;
{
char *p;
int size;
p = *str;
if (*p == '0' && *(p + 1) == 'x') {
p++;
do {
p++;
} while (isxdigit((unsigned char)*p));
} else {
do {
p++;
} while (isdigit((unsigned char)*p));
}
size = p - *str;
*val = malloc(size + 1);
if (val == NULL)
error("alloc failed");
(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_HYPER, "hyper"},
{TOK_FLOAT, "float"},
{TOK_DOUBLE, "double"},
{TOK_QUAD, "quadruple"},
{TOK_STRING, "string"},
{TOK_PROGRAM, "program"},
{TOK_VERSION, "version"},
{TOK_EOF, "??????"},
};
static void
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((unsigned char)str[len]) &&
str[len] != '_') {
tokp->kind = s->kind;
tokp->str = s->str;
*mark = str + len;
return;
}
}
}
tokp->kind = TOK_IDENT;
for (len = 0; isalnum((unsigned char)str[len]) || str[len] == '_';
len++)
;
tokp->str = malloc(len + 1);
if (tokp->str == NULL)
error("alloc failed");
(void) strncpy(tokp->str, str, len);
tokp->str[len] = 0;
*mark = str + len;
}
static int
cppline(line)
char *line;
{
return (line == curline && *line == '#');
}
static int
directive(line)
char *line;
{
return (line == curline && *line == '%');
}
static void
printdirective(line)
char *line;
{
fprintf(fout, "%s", line + 1);
}
static void
docppline(line, lineno, fname)
char *line;
int *lineno;
char **fname;
{
char *file;
int num;
char *p;
line++;
while (isspace((unsigned char)*line)) {
line++;
}
num = atoi(line);
while (isdigit((unsigned char)*line)) {
line++;
}
while (isspace((unsigned char)*line)) {
line++;
}
if (*line != '"') {
error("preprocessor error");
}
line++;
p = file = malloc(strlen(line) + 1);
if (p == NULL)
error("alloc failed");
while (*line && *line != '"') {
*p++ = *line++;
}
if (*line == 0) {
error("preprocessor error");
}
*p = 0;
if (*file == 0) {
*fname = NULL;
free(file);
} else {
*fname = file;
}
*lineno = num - 1;
}