2021-10-11 19:38:01 -03:00

347 lines
6.4 KiB
C
Executable File

/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
/* The copyright notice above does not evidence any */
/* actual or intended publication of such source code. */
#pragma ident "@(#)args.c 1.4 92/07/17 SMI" /* SVr4.0 1.2 */
/*LINTLIBRARY*/
/*
* C++ Demangler Source Code
* @(#)master 1.5
* 7/27/88 13:54:37
*/
#include <ctype.h>
#ifdef __STDC__
# include <stdlib.h>
# include <string.h>
#else
extern long strtol();
extern int strlen();
#endif
#include "elf_dem.h"
#include "String.h"
/* This structure is used to keep
* track of pointers to argument
* descriptions in the mangled string.
* This is needed for N and T encodings
* to work.
*/
typedef struct {
char *list[10];
int pos;
} Place;
static Place here;
/* Strings and flags needed by the argument demangles. The declarator
* is built up in ptr. Type modifiers are held in the flag fields.
* The type itself is passed in separately.
*/
typedef struct {
String *ptr;
int Sign,Uns,Cons,Vol;
} Arg_Remem;
/* initialize Arg_Remem */
static void
mkar(r)
Arg_Remem *r;
{
r->ptr = mk_String((String *)0);
r->Sign = r->Uns = r->Cons = r->Vol = 0;
}
/* free data for Arg_Remem */
static void
delar(r)
Arg_Remem *r;
{
free_String(r->ptr);
}
/* This routine formats a single argument
* on the buffer sptr.
* c is the type or class name, n is its length.
*/
static void
nsetarg(sptr,r,c,n)
String **sptr;
Arg_Remem *r;
char *c;
{
r->ptr = nprep_String(c, r->ptr, n);
if(r->Cons)
r->ptr = prep_String("const ",r->ptr);
if(r->Vol)
r->ptr = prep_String("volatile ",r->ptr);
if(r->Uns)
r->ptr = prep_String("unsigned ",r->ptr);
else if(r->Sign)
r->ptr = prep_String("signed ",r->ptr);
*sptr = app_String(*sptr,PTR(r->ptr));
delar(r);
}
/* This routine formats a single argument
* on the buffer sptr.
* c is the null terminated type or class name.
*/
static void
setarg(sptr,r,c)
String **sptr;
Arg_Remem *r;
char *c;
{
nsetarg(sptr,r,c,ID_NAME_MAX);
}
/* Demangle a single function argument.
* Returns the number of characters processed from c.
*/
int
demangle_doarg(sptr,c)
String **sptr;
char *c;
{
register int i;
Arg_Remem ar;
mkar(&ar);
if(here.pos < 10 && here.pos >= 0)
here.list[here.pos++] = c;
for(i=0;c[i];i++) {
/* Loop until you find a type.
Then call setarg and return.
*/
switch(c[i]) {
case 'T':
{
Place tmp;
tmp = here;
here.pos = c[1] - '1';
if(here.pos < 0 || here.pos >= tmp.pos-1) {
delar(&ar);
return -1;
}
(void) demangle_doarg(sptr,here.list[here.pos]);
here = tmp;
delar(&ar);
return 2;
}
case 'N':
{
Place tmp;
int cycles,pos;
cycles = c[1] - '0'; pos = c[2] - '1';
here.pos += cycles - 1;
tmp = here;
if(cycles <= 1 || cycles > 9 || pos < 0 || pos >= tmp.pos-1) {
delar(&ar);
return -1;
}
while(cycles--) {
here = tmp;
here.pos = pos;
(void) demangle_doarg(sptr,here.list[here.pos]);
(*sptr) = app_String(*sptr,",");
}
*sptr = trunc_String(*sptr, 1);
here = tmp;
delar(&ar);
return 3;
}
/* Qualifiers to type names */
case 'S':
ar.Sign = 1;
break;
case 'U':
ar.Uns = 1;
break;
case 'C':
ar.Cons = 1;
break;
case 'V':
ar.Vol = 1;
break;
/* Pointers, references, and Member Pointers */
case 'P':
case 'R':
case 'M':
if(ar.Cons) {
ar.ptr = prep_String(" const",ar.ptr);
ar.Cons = 0;
}
if(ar.Vol) {
ar.ptr = prep_String(" volatile",ar.ptr);
ar.Vol = 0;
}
if(c[i] == 'P')
ar.ptr = prep_String("*",ar.ptr);
else if(c[i] == 'R')
ar.ptr = prep_String("&",ar.ptr);
else {
int cnt = 0;
char *s;
ar.ptr = prep_String("::*",ar.ptr);
/* Skip over the 'M' */
i++;
cnt = strtol(c+i, &s, 10);
i = s - c;
ar.ptr = nprep_String(c+i,ar.ptr,cnt);
ar.ptr = prep_String(" ",ar.ptr);
i += cnt;
/* The loop increments i */
i--;
}
break;
/* Demangle for basic built-in types */
case 'i':
setarg(sptr,&ar,"int");
return i + 1;
case 'c':
setarg(sptr,&ar,"char");
return i + 1;
case 's':
setarg(sptr,&ar,"short");
return i + 1;
case 'l':
setarg(sptr,&ar,"long");
return i + 1;
case 'f':
setarg(sptr,&ar,"float");
return i + 1;
case 'd':
setarg(sptr,&ar,"double");
return i + 1;
case 'r':
setarg(sptr,&ar,"long double");
return i + 1;
/* Class encodings */
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
{
int cnt = 0;
char *s;
cnt = strtol(c+i, &s, 10);
i = s - c;
if ((int) strlen(c+i) < cnt) {
delar(&ar);
return -1;
}
nsetarg(sptr,&ar,c+i,cnt);
return i+cnt;
}
/* Ellipsis and void */
case 'e':
setarg(sptr,&ar,"...");
return i + 1;
case 'v':
setarg(sptr,&ar,"void");
return i + 1;
/* Arrays */
case 'A':
if(*PTR(ar.ptr)) {
ar.ptr = prep_String("(",ar.ptr);
ar.ptr = app_String(ar.ptr,")");
}
ar.ptr = app_String(ar.ptr,"[");
{
int cnt = 0;
i++;
while(isdigit(c[i+cnt]))
cnt++;
ar.ptr = napp_String(ar.ptr,c+i,cnt);
i += cnt;
if(c[i] != '_') {
delar(&ar);
return -1;
}
}
ar.ptr = app_String(ar.ptr,"]");
break;
/* Functions
* This will always be called as a pointer
* to a function.
*/
case 'F':
ar.ptr = prep_String("(",ar.ptr);
ar.ptr = app_String(ar.ptr,")");
{
Place tmp;
tmp = here;
i++;
i += demangle_doargs(&ar.ptr,c+i);
if(c[i] != '_') {
delar(&ar);
return -1;
}
here = tmp;
}
break;
/* Needed when this is called to demangle
* an argument of a pointer to a function.
*/
case '_':
delar(&ar);
return 0;
default:
delar(&ar);
return -1;
}
}
/* Did the argument list terminate properly? */
{
int rc = 0;
if(*PTR(ar.ptr) || ar.Uns || ar.Sign || ar.Cons || ar.Vol)
rc = -1;
delar(&ar);
return rc;
}
}
/* This function is called to demangle
* an argument list.
* Returns the number of characters processed from c.
*/
int
demangle_doargs(sptr,c)
String **sptr;
char *c;
{
int i,n = 0;
here.pos = 0;
*sptr = app_String(*sptr,"(");
while(*c && (i = demangle_doarg(sptr,c)) > 0) {
c += i;
n += i;
(*sptr) = app_String(*sptr,(*c && *c == 'e') ? " " : ",");
}
if(i < 0)
return -1;
*sptr = app_String(trunc_String(*sptr, 1),")");
return n;
}