File: [local] / src / usr.bin / rpcgen / rpc_cout.c (download)
Revision 1.18, Fri Jul 16 07:31:05 2004 UTC (19 years, 10 months ago) by matthieu
Branch: MAIN
CVS Tags: OPENBSD_4_2_BASE, OPENBSD_4_2, OPENBSD_4_1_BASE, OPENBSD_4_1, OPENBSD_4_0_BASE, OPENBSD_4_0, OPENBSD_3_9_BASE, OPENBSD_3_9, OPENBSD_3_8_BASE, OPENBSD_3_8, OPENBSD_3_7_BASE, OPENBSD_3_7, OPENBSD_3_6_BASE, OPENBSD_3_6 Changes since 1.17: +6 -4 lines
Avoid generating an unused variable. From NetBSD. ok deraadt@
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/* $OpenBSD: rpc_cout.c,v 1.18 2004/07/16 07:31:05 matthieu Exp $ */
/* $NetBSD: rpc_cout.c,v 1.6 1996/10/01 04:13:53 cgd Exp $ */
/*
* 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 or with the express written consent of
* Sun Microsystems, Inc.
*
* 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[] = "@(#)rpc_cout.c 1.13 89/02/22 (C) 1987 SMI";
#endif
/*
* rpc_cout.c, XDR routine outputter for the RPC protocol compiler
*/
#include <sys/cdefs.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "rpc_parse.h"
#include "rpc_util.h"
static int findtype(definition *, char *);
static int undefined(char *);
static void print_generic_header(char *, int);
static void print_header(definition *);
static void print_prog_header(proc_list *);
static void print_trailer(void);
static void print_ifopen(int, char *);
static void print_ifarg(char *);
static void print_ifsizeof(char *, char *);
static void print_ifclose(int);
static void print_ifstat(int, char *, char *, relation, char *, char *, char *);
static void emit_program(definition *);
static void emit_enum(definition *);
static void emit_union(definition *);
static void emit_struct(definition *);
static void emit_typedef(definition *);
static void print_stat(int, declaration *);
void emit_inline(declaration *, int);
void emit_single_in_line(declaration *, int, relation);
/*
* Emit the C-routine for the given definition
*/
void
emit(def)
definition *def;
{
if (def->def_kind == DEF_CONST) {
return;
}
if (def->def_kind == DEF_PROGRAM) {
emit_program(def);
return;
}
if (def->def_kind == DEF_TYPEDEF) {
/* now we need to handle declarations like struct typedef foo
* foo; since we dont want this to be expanded into 2 calls to
* xdr_foo */
if (strcmp(def->def.ty.old_type, def->def_name) == 0)
return;
}
print_header(def);
switch (def->def_kind) {
case DEF_UNION:
emit_union(def);
break;
case DEF_ENUM:
emit_enum(def);
break;
case DEF_STRUCT:
emit_struct(def);
break;
case DEF_TYPEDEF:
emit_typedef(def);
break;
}
print_trailer();
}
static int
findtype(def, type)
definition *def;
char *type;
{
if (def->def_kind == DEF_PROGRAM || def->def_kind == DEF_CONST) {
return (0);
} else {
return (streq(def->def_name, type));
}
}
static int
undefined(type)
char *type;
{
definition *def;
def = (definition *) FINDVAL(defined, type, findtype);
return (def == NULL);
}
static void
print_generic_header(procname, pointerp)
char *procname;
int pointerp;
{
fprintf(fout, "\n");
fprintf(fout, "bool_t\n");
if (Cflag) {
fprintf(fout, "xdr_%s(", procname);
fprintf(fout, "XDR *xdrs, ");
fprintf(fout, "%s ", procname);
if (pointerp)
fprintf(fout, "*");
fprintf(fout, "objp)\n{\n");
} else {
fprintf(fout, "xdr_%s(xdrs, objp)\n", procname);
fprintf(fout, "\tXDR *xdrs;\n");
fprintf(fout, "\t%s ", procname);
if (pointerp)
fprintf(fout, "*");
fprintf(fout, "objp;\n{\n");
}
}
static void
print_header(def)
definition *def;
{
print_generic_header(def->def_name,
def->def_kind != DEF_TYPEDEF ||
!isvectordef(def->def.ty.old_type, def->def.ty.rel));
/* Now add Inline support */
if (doinline == 0)
return;
}
static void
print_prog_header(plist)
proc_list *plist;
{
print_generic_header(plist->args.argname, 1);
}
static void
print_trailer()
{
fprintf(fout, "\treturn (TRUE);\n");
fprintf(fout, "}\n");
}
static void
print_ifopen(indent, name)
int indent;
char *name;
{
tabify(fout, indent);
fprintf(fout, "if (!xdr_%s(xdrs", name);
}
static void
print_ifarg(arg)
char *arg;
{
fprintf(fout, ", %s", arg);
}
static void
print_ifsizeof(prefix, type)
char *prefix;
char *type;
{
if (streq(type, "bool")) {
fprintf(fout, ", sizeof(bool_t), (xdrproc_t)xdr_bool");
} else {
fprintf(fout, ", sizeof(");
if (undefined(type) && prefix) {
fprintf(fout, "%s ", prefix);
}
fprintf(fout, "%s), (xdrproc_t)xdr_%s", type, type);
}
}
static void
print_ifclose(indent)
int indent;
{
fprintf(fout, "))\n");
tabify(fout, indent);
fprintf(fout, "\treturn (FALSE);\n");
}
static void
print_ifstat(indent, prefix, type, rel, amax, objname, name)
int indent;
char *prefix;
char *type;
relation rel;
char *amax;
char *objname;
char *name;
{
char *alt = NULL;
switch (rel) {
case REL_POINTER:
print_ifopen(indent, "pointer");
print_ifarg("(char **)");
fprintf(fout, "%s", objname);
print_ifsizeof(prefix, type);
break;
case REL_VECTOR:
if (streq(type, "string")) {
alt = "string";
} else
if (streq(type, "opaque")) {
alt = "opaque";
}
if (alt) {
print_ifopen(indent, alt);
print_ifarg(objname);
print_ifarg(amax);
} else {
print_ifopen(indent, "vector");
print_ifarg("(char *)");
fprintf(fout, "%s,\n", objname);
tabify(fout, indent);
fprintf(fout, " %s", amax);
}
if (!alt) {
print_ifsizeof(prefix, type);
}
break;
case REL_ARRAY:
if (streq(type, "string")) {
alt = "string";
} else
if (streq(type, "opaque")) {
alt = "bytes";
}
if (streq(type, "string")) {
print_ifopen(indent, alt);
print_ifarg(objname);
print_ifarg(amax);
} else {
if (alt) {
print_ifopen(indent, alt);
} else {
print_ifopen(indent, "array");
}
print_ifarg("(char **)");
if (*objname == '&') {
fprintf(fout, "%s.%s_val,\n\t (u_int *)%s.%s_len",
objname, name, objname, name);
} else {
fprintf(fout, "&%s->%s_val,\n\t (u_int *)&%s->%s_len",
objname, name, objname, name);
}
fprintf(fout, ",\n\t %s", amax);
}
if (!alt) {
print_ifsizeof(prefix, type);
}
break;
case REL_ALIAS:
print_ifopen(indent, type);
print_ifarg(objname);
break;
}
print_ifclose(indent);
}
/* ARGSUSED */
static void
emit_enum(def)
definition *def;
{
fprintf(fout, "\n");
print_ifopen(1, "enum");
print_ifarg("(enum_t *)objp");
print_ifclose(1);
}
static void
emit_program(def)
definition *def;
{
decl_list *dl;
version_list *vlist;
proc_list *plist;
for (vlist = def->def.pr.versions; vlist != NULL; vlist = vlist->next)
for (plist = vlist->procs; plist != NULL; plist = plist->next) {
if (!newstyle || plist->arg_num < 2)
continue; /* old style, or single
* argument */
print_prog_header(plist);
for (dl = plist->args.decls; dl != NULL;
dl = dl->next)
print_stat(1, &dl->decl);
print_trailer();
}
}
static void
emit_union(def)
definition *def;
{
declaration *dflt;
case_list *cl;
declaration *cs;
char *object;
char *vecformat = "objp->%s_u.%s";
char *format = "&objp->%s_u.%s";
fprintf(fout, "\n");
print_stat(1, &def->def.un.enum_decl);
fprintf(fout, "\tswitch (objp->%s) {\n", def->def.un.enum_decl.name);
for (cl = def->def.un.cases; cl != NULL; cl = cl->next) {
fprintf(fout, "\tcase %s:\n", cl->case_name);
if (cl->contflag == 1) /* a continued case statement */
continue;
cs = &cl->case_decl;
if (!streq(cs->type, "void")) {
int len = strlen(def->def_name) + strlen(format) +
strlen(cs->name) + 1;
object = alloc(len);
if (object == NULL) {
fprintf(stderr, "Fatal error: no memory\n");
crash();
}
if (isvectordef(cs->type, cs->rel)) {
snprintf(object, len, vecformat, def->def_name,
cs->name);
} else {
snprintf(object, len, format, def->def_name,
cs->name);
}
print_ifstat(2, cs->prefix, cs->type, cs->rel, cs->array_max,
object, cs->name);
free(object);
}
fprintf(fout, "\t\tbreak;\n");
}
dflt = def->def.un.default_decl;
if (dflt != NULL) {
if (!streq(dflt->type, "void")) {
int len = strlen(def->def_name) + strlen(format) +
strlen(dflt->name) + 1;
fprintf(fout, "\tdefault:\n");
object = alloc(len);
if (object == NULL) {
fprintf(stderr, "Fatal error: no memory\n");
crash();
}
if (isvectordef(dflt->type, dflt->rel)) {
snprintf(object, len, vecformat, def->def_name,
dflt->name);
} else {
snprintf(object, len, format, def->def_name,
dflt->name);
}
print_ifstat(2, dflt->prefix, dflt->type, dflt->rel,
dflt->array_max, object, dflt->name);
free(object);
fprintf(fout, "\t\tbreak;\n");
}
} else {
fprintf(fout, "\tdefault:\n");
fprintf(fout, "\t\treturn (FALSE);\n");
}
fprintf(fout, "\t}\n");
}
static void
emit_struct(def)
definition *def;
{
decl_list *dl;
int i, j, size, flag;
decl_list *cur, *psav;
bas_type *ptr;
char *sizestr, *plus;
char ptemp[256];
int can_inline;
if (doinline == 0) {
for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
print_stat(1, &dl->decl);
return;
}
for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
if (dl->decl.rel == REL_VECTOR) {
fprintf(fout, "\tint i;\n");
break;
}
fprintf(fout, "\n");
size = 0;
can_inline = 0;
for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
if (dl->decl.prefix == NULL &&
(ptr = find_type(dl->decl.type)) != NULL &&
(dl->decl.rel == REL_ALIAS || dl->decl.rel == REL_VECTOR)) {
if (dl->decl.rel == REL_ALIAS)
size += ptr->length;
else {
can_inline = 1;
break; /* can be inlined */
}
} else {
if (size >= doinline) {
can_inline = 1;
break; /* can be inlined */
}
size = 0;
}
if (size > doinline)
can_inline = 1;
if (can_inline == 0) { /* can not inline, drop back to old mode */
fprintf(fout, "\n");
for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
print_stat(1, &dl->decl);
return;
}
/* May cause lint to complain. but ... */
fprintf(fout, "\tint32_t *buf;\n");
flag = PUT;
for (j = 0; j < 2; j++) {
if (flag == PUT)
fprintf(fout, "\n\tif (xdrs->x_op == XDR_ENCODE) {\n");
else
fprintf(fout, "\t\treturn (TRUE);\n\t} else if (xdrs->x_op == XDR_DECODE) {\n");
i = 0;
size = 0;
sizestr = NULL;
for (dl = def->def.st.decls; dl != NULL; dl = dl->next) { /* xxx */
/* now walk down the list and check for basic types */
if (dl->decl.prefix == NULL &&
(ptr = find_type(dl->decl.type)) != NULL &&
(dl->decl.rel == REL_ALIAS || dl->decl.rel == REL_VECTOR)) {
if (i == 0)
cur = dl;
i++;
if (dl->decl.rel == REL_ALIAS)
size += ptr->length;
else {
/* this is required to handle arrays */
if (sizestr == NULL)
plus = "";
else
plus = "+";
if (ptr->length != 1)
snprintf(ptemp, sizeof ptemp,
"%s%s* %d", plus,
dl->decl.array_max,
ptr->length);
else
snprintf(ptemp, sizeof ptemp,
"%s%s", plus,
dl->decl.array_max);
/* now concatenate to sizestr !!!! */
if (sizestr == NULL) {
sizestr = strdup(ptemp);
if (sizestr == NULL) {
fprintf(stderr,
"Fatal error: no memory\n");
crash();
}
} else {
size_t len;
len = strlen(sizestr) +
strlen(ptemp) + 1;
sizestr = (char *)realloc(sizestr, len);
if (sizestr == NULL) {
fprintf(stderr,
"Fatal error: no memory\n");
crash();
}
/* build up length of array */
strlcat(sizestr, ptemp, len);
}
}
} else {
if (i > 0) {
if (sizestr == NULL && size < doinline) {
/* don't expand into inline
* code if size < doinline */
while (cur != dl) {
print_stat(2, &cur->decl);
cur = cur->next;
}
} else {
/* were already looking at a
* xdr_inlineable structure */
if (sizestr == NULL)
fprintf(fout,
"\t\tbuf = (int32_t *)XDR_INLINE(xdrs,\n\t\t %d * BYTES_PER_XDR_UNIT);", size);
else if (size == 0)
fprintf(fout,
"\t\tbuf = (int32_t *)XDR_INLINE(xdrs,\n\t\t %s * BYTES_PER_XDR_UNIT);",
sizestr);
else
fprintf(fout,
"\t\tbuf = (int32_t *)XDR_INLINE(xdrs,\n\t\t (%d + %s) * BYTES_PER_XDR_UNIT);", size, sizestr);
fprintf(fout,
"\n\t\tif (buf == NULL) {\n");
psav = cur;
while (cur != dl) {
print_stat(3, &cur->decl);
cur = cur->next;
}
fprintf(fout, "\t\t} else {\n");
cur = psav;
while (cur != dl) {
emit_inline(&cur->decl, flag);
cur = cur->next;
}
fprintf(fout, "\t\t}\n");
}
}
size = 0;
i = 0;
sizestr = NULL;
print_stat(2, &dl->decl);
}
}
if (i > 0) {
if (sizestr == NULL && size < doinline) {
/* don't expand into inline code if size <
* doinline */
while (cur != dl) {
print_stat(2, &cur->decl);
cur = cur->next;
}
} else {
/* were already looking at a xdr_inlineable
* structure */
if (sizestr == NULL)
fprintf(fout, "\t\tbuf = (int32_t *)XDR_INLINE(xdrs,\n\t\t %d * BYTES_PER_XDR_UNIT);",
size);
else
if (size == 0)
fprintf(fout,
"\t\tbuf = (int32_t *)XDR_INLINE(xdrs,\n\t\t %s * BYTES_PER_XDR_UNIT);",
sizestr);
else
fprintf(fout,
"\t\tbuf = (int32_t *)XDR_INLINE(xdrs,\n\t\t (%d + %s) * BYTES_PER_XDR_UNIT);",
size, sizestr);
fprintf(fout, "\n\t\tif (buf == NULL) {\n");
psav = cur;
while (cur != NULL) {
print_stat(3, &cur->decl);
cur = cur->next;
}
fprintf(fout, "\t\t} else {\n");
cur = psav;
while (cur != dl) {
emit_inline(&cur->decl, flag);
cur = cur->next;
}
fprintf(fout, "\t\t}\n");
}
}
flag = GET;
}
fprintf(fout, "\t\treturn (TRUE);\n\t}\n\n");
/* now take care of XDR_FREE case */
for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
print_stat(1, &dl->decl);
}
static void
emit_typedef(def)
definition *def;
{
char *prefix = def->def.ty.old_prefix;
char *type = def->def.ty.old_type;
char *amax = def->def.ty.array_max;
relation rel = def->def.ty.rel;
fprintf(fout, "\n");
print_ifstat(1, prefix, type, rel, amax, "objp", def->def_name);
}
static void
print_stat(indent, dec)
declaration *dec;
int indent;
{
char *prefix = dec->prefix;
char *type = dec->type;
char *amax = dec->array_max;
relation rel = dec->rel;
char name[256];
if (isvectordef(type, rel)) {
snprintf(name, sizeof name, "objp->%s", dec->name);
} else {
snprintf(name, sizeof name, "&objp->%s", dec->name);
}
print_ifstat(indent, prefix, type, rel, amax, name, dec->name);
}
char *upcase(char *);
void
emit_inline(decl, flag)
declaration *decl;
int flag;
{
/*check whether an array or not */
switch (decl->rel) {
case REL_ALIAS:
fprintf(fout, "\t");
emit_single_in_line(decl, flag, REL_ALIAS);
break;
case REL_VECTOR:
fprintf(fout, "\t\t\t{\n\t\t\t\t%s *genp;\n\n", decl->type);
fprintf(fout, "\t\t\t\tfor (i = 0, genp = objp->%s;\n\t\t\t\t i < %s; i++) {\n\t\t\t",
decl->name, decl->array_max);
emit_single_in_line(decl, flag, REL_VECTOR);
fprintf(fout, "\t\t\t\t}\n\t\t\t}\n");
}
}
void
emit_single_in_line(decl, flag, rel)
declaration *decl;
int flag;
relation rel;
{
char *upp_case;
int freed = 0;
if (flag == PUT)
fprintf(fout, "\t\tIXDR_PUT_");
else
if (rel == REL_ALIAS)
fprintf(fout, "\t\tobjp->%s = IXDR_GET_", decl->name);
else
fprintf(fout, "\t\t*genp++ = IXDR_GET_");
upp_case = upcase(decl->type);
/* hack - XX */
if (strcmp(upp_case, "INT") == 0) {
free(upp_case);
freed = 1;
upp_case = "LONG";
}
if (strcmp(upp_case, "U_INT") == 0) {
free(upp_case);
freed = 1;
upp_case = "U_LONG";
}
if (flag == PUT)
if (rel == REL_ALIAS)
fprintf(fout, "%s(buf, objp->%s);\n", upp_case, decl->name);
else
fprintf(fout, "%s(buf, *genp++);\n", upp_case);
else
fprintf(fout, "%s(buf);\n", upp_case);
if (!freed)
free(upp_case);
}
char *
upcase(str)
char *str;
{
char *ptr, *hptr;
ptr = (char *) malloc(strlen(str)+1);
if (ptr == (char *) NULL) {
fprintf(stderr, "malloc failed\n");
exit(1);
}
hptr = ptr;
while (*str != '\0')
*ptr++ = toupper(*str++);
*ptr = '\0';
return (hptr);
}