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Diffstat (limited to 'usr.bin/rpcgen/rpc_scan.c')
-rw-r--r--usr.bin/rpcgen/rpc_scan.c517
1 files changed, 517 insertions, 0 deletions
diff --git a/usr.bin/rpcgen/rpc_scan.c b/usr.bin/rpcgen/rpc_scan.c
new file mode 100644
index 000000000000..e65b7996a89c
--- /dev/null
+++ b/usr.bin/rpcgen/rpc_scan.c
@@ -0,0 +1,517 @@
+/*
+ * 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
+ */
+
+#ident "@(#)rpc_scan.c 1.13 93/07/05 SMI"
+
+#ifndef lint
+static char sccsid[] = "@(#)rpc_scan.c 1.11 89/02/22 (C) 1987 SMI";
+#endif
+
+/*
+ * rpc_scan.c, Scanner for the RPC protocol compiler
+ * Copyright (C) 1987, Sun Microsystems, Inc.
+ */
+
+#include <sys/wait.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include "rpc_scan.h"
+#include "rpc_parse.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 __P(( token * ));
+static int findstrconst __P(( char **, char **));
+static int findchrconst __P(( char **, char **));
+static int findconst __P(( char **, char **));
+static int findkind __P(( char **, token * ));
+static int cppline __P(( char * ));
+static int directive __P(( char * ));
+static int printdirective __P(( char * ));
+static int docppline __P(( char *, int *, char ** ));
+
+/*
+ * 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;
+ int stat = 0;
+
+
+ if (pushed) {
+ pushed = 0;
+ *tokp = lasttok;
+ return;
+ }
+ commenting = 0;
+ for (;;) {
+ if (*where == 0) {
+ for (;;) {
+ if (!fgets(curline, MAXLINESIZE, fin)) {
+ tokp->kind = TOK_EOF;
+ /* now check if cpp returned non NULL value */
+ waitpid(childpid, &stat, WUNTRACED);
+ if (stat > 0) {
+ /* Set return value from rpcgen */
+ nonfatalerrors = stat >> 8;
+ }
+ *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) {
+ 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(*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
+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 = 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_HYPER, "hyper"},
+ {TOK_FLOAT, "float"},
+ {TOK_DOUBLE, "double"},
+ {TOK_QUAD, "quadruple"},
+ {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;
+}