1042 lines
20 KiB
C
1042 lines
20 KiB
C
/* Demangler for GNU C++
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Copyright (C) 1989 Free Software Foundation, Inc.
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written by James Clark (jjc@jclark.uucp)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This is for g++ 1.36.1 (November 6 version). It will probably
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require changes for any other version.
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Modified for g++ 1.36.2 (November 18 version).
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Modified for g++ 1.90.06 (December 31 version). */
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/* This file exports one function
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char *cplus_demangle (const char *name, int mode)
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If NAME is a mangled function name produced by GNU C++, then
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a pointer to a malloced string giving a C++ representation
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of the name will be returned; otherwise NULL will be returned.
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It is the caller's responsibility to free the string which
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is returned.
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If MODE > 0, then ANSI qualifiers such as `const' and `void' are output.
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Otherwise they are not.
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If MODE >= 0, parameters are emitted; otherwise not.
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For example,
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cplus_demangle ("foo__1Ai", 0) => "A::foo(int)"
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cplus_demangle ("foo__1Ai", 1) => "A::foo(int)"
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cplus_demangle ("foo__1Ai", -1) => "A::foo"
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cplus_demangle ("foo__1Afe", 0) => "A::foo(float,...)"
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cplus_demangle ("foo__1Afe", 1) => "A::foo(float,...)"
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cplus_demangle ("foo__1Afe", -1) => "A::foo"
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This file imports xmalloc and xrealloc, which are like malloc and
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realloc except that they generate a fatal error if there is no
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available memory. */
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/* define this if names don't start with _ */
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/* #define nounderscore 1 */
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#include <stdio.h>
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#include <ctype.h>
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/* GDB-specific, FIXME. */
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#include "defs.h"
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#include "param.h"
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#ifdef USG
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#include <memory.h>
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#include <string.h>
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#else
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#include <strings.h>
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#define memcpy(s1, s2, n) bcopy ((s2), (s1), (n))
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#define memcmp(s1, s2, n) bcmp ((s2), (s1), (n))
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#define strchr index
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#define strrchr rindex
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#endif
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/* This is '$' on systems where the assembler can deal with that.
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Where the assembler can't, it's '.' (but on many systems '.' is
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used for other things). */
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#if !defined (CPLUS_MARKER)
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#define CPLUS_MARKER '$'
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#endif
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#ifndef __STDC__
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#define const
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#endif
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#ifdef __STDC__
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extern char *cplus_demangle (const char *type, int mode);
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#else
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extern char *cplus_demangle ();
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#endif
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#ifdef __STDC__
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/* GDB prototypes these as void* in defs.h, so we better too, at least
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as long as we're including defs.h. */
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extern void *xmalloc (int);
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extern void *xrealloc (char *, int);
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extern void free (void *);
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#else
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extern char *xmalloc ();
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extern char *xrealloc ();
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extern void free ();
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#endif
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static char **typevec = 0;
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static int ntypes = 0;
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static int typevec_size = 0;
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const static struct optable {
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const char *in;
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const char *out;
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} optable[] = {
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"nw", " new", /* new (1.92) */
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"dl", " delete", /* new (1.92) */
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"new", " new", /* old (1.91, and 1.x) */
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"delete", " delete", /* old (1.91, and 1.x) */
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"ne", "!=",
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"eq", "==",
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"ge", ">=",
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"gt", ">",
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"le", "<=",
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"lt", "<",
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"plus", "+",
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"minus", "-",
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"mult", "*",
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"convert", "+", /* unary + */
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"negate", "-", /* unary - */
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"trunc_mod", "%",
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"trunc_div", "/",
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"truth_andif", "&&",
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"truth_orif", "||",
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"truth_not", "!",
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"postincrement", "++",
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"postdecrement", "--",
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"bit_ior", "|",
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"bit_xor", "^",
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"bit_and", "&",
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"bit_not", "~",
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"call", "()",
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"cond", "?:",
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"alshift", "<<",
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"arshift", ">>",
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"component", "->",
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"indirect", "*",
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"method_call", "->()",
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"addr", "&", /* unary & */
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"array", "[]",
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"compound", ",",
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"nop", "", /* for operator= */
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};
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/* Beware: these aren't '\0' terminated. */
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typedef struct string {
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char *b; /* pointer to start of string */
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char *p; /* pointer after last character */
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char *e; /* pointer after end of allocated space */
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} string;
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#ifdef __STDC__
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static void string_need (string *s, int n);
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static void string_delete (string *s);
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static void string_init (string *s);
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static void string_clear (string *s);
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static int string_empty (string *s);
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static void string_append (string *p, const char *s);
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static void string_appends (string *p, string *s);
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static void string_appendn (string *p, const char *s, int n);
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static void string_prepend (string *p, const char *s);
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#if 0
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static void string_prepends (string *p, string *s);
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#endif
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static void string_prependn (string *p, const char *s, int n);
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static int get_count (const char **type, int *count);
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static int do_args (const char **type, string *decl, int arg_mode);
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static int do_type (const char **type, string *result, int arg_mode);
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static int do_arg (const char **type, string *result, int arg_mode);
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static void munge_function_name (string *name, int arg_mode);
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static void remember_type (const char *type, int len);
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#else
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static void string_need ();
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static void string_delete ();
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static void string_init ();
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static void string_clear ();
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static int string_empty ();
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static void string_append ();
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static void string_appends ();
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static void string_appendn ();
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static void string_prepend ();
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#if 0
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static void string_prepends ();
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#endif
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static void string_prependn ();
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static int get_count ();
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static int do_args ();
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static int do_type ();
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static int do_arg ();
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static int do_args ();
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static void munge_function_name ();
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static void remember_type ();
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#endif
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/* Takes operator name as e.g. "++" and returns mangled
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operator name (e.g. "postincrement_expr"), or NULL if not found. */
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char *
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cplus_mangle_opname (opname)
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char *opname;
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{
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int i, len = strlen (opname);
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for (i = 0; i < sizeof (optable)/sizeof (optable[0]); i++)
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{
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if (strlen (optable[i].out) == len
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&& memcmp (optable[i].out, opname, len) == 0)
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return (char *)optable[i].in;
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}
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return 0;
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}
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char *
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cplus_demangle (type, arg_mode)
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const char *type;
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int arg_mode;
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{
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string decl;
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int n;
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int success = 0;
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int constructor = 0;
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int const_flag = 0;
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int i;
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const char *p;
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#ifndef LONGERNAMES
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const char *premangle;
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#endif
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# define print_ansi_qualifiers (arg_mode > 0)
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# define print_arg_types (arg_mode >= 0)
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if (type == NULL || *type == '\0')
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return NULL;
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#ifndef nounderscore
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if (*type++ != '_')
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return NULL;
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#endif
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p = type;
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while (*p != '\0' && !(*p == '_' && p[1] == '_'))
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p++;
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if (*p == '\0')
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{
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/* destructor */
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if (type[0] == '_' && type[1] == CPLUS_MARKER && type[2] == '_')
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{
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char *tem = (char *) xmalloc ((strlen (type) - 3)*2 + 3 + 2 + 1);
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strcpy (tem, type + 3);
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strcat (tem, "::~");
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strcat (tem, type + 3);
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strcat (tem, "()");
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return tem;
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}
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/* static data member */
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if (*type != '_' && (p = strchr (type, CPLUS_MARKER)) != NULL)
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{
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char *tem = (char *) xmalloc (strlen (type) + 2);
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memcpy (tem, type, p - type);
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strcpy (tem + (p - type), "::");
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strcpy (tem + (p - type) + 2, p + 1);
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return tem;
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}
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/* virtual table "_vt$" */
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if (type[0] == '_' && type[1] == 'v' && type[2] == 't' && type[3] == CPLUS_MARKER)
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{
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char *tem = (char *) xmalloc (strlen (type + 4) + 14 + 1);
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strcpy (tem, type + 4);
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strcat (tem, " virtual table");
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return tem;
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}
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return NULL;
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}
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string_init (&decl);
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if (p == type)
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{
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if (!isdigit (p[2]))
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{
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string_delete (&decl);
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return NULL;
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}
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constructor = 1;
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}
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else
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{
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string_appendn (&decl, type, p - type);
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munge_function_name (&decl, arg_mode);
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}
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p += 2;
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#ifndef LONGERNAMES
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premangle = p;
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#endif
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switch (*p)
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{
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case 'C':
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/* a const member function */
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if (!isdigit (p[1]))
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{
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string_delete (&decl);
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return NULL;
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}
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p += 1;
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const_flag = 1;
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/* fall through */
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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n = 0;
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do
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{
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n *= 10;
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n += *p - '0';
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p += 1;
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}
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while (isdigit (*p));
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if (strlen (p) < n)
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{
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string_delete (&decl);
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return NULL;
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}
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if (constructor)
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{
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string_appendn (&decl, p, n);
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string_append (&decl, "::");
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string_appendn (&decl, p, n);
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}
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else
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{
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string_prepend (&decl, "::");
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string_prependn (&decl, p, n);
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}
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p += n;
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#ifndef LONGERNAMES
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remember_type (premangle, p - premangle);
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#endif
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success = do_args (&p, &decl, arg_mode);
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if (const_flag && print_arg_types)
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string_append (&decl, " const");
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break;
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case 'F':
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p += 1;
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success = do_args (&p, &decl, arg_mode);
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break;
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}
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for (i = 0; i < ntypes; i++)
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if (typevec[i] != NULL)
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free (typevec[i]);
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ntypes = 0;
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if (typevec != NULL)
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{
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free ((char *)typevec);
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typevec = NULL;
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typevec_size = 0;
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}
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if (success)
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{
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string_appendn (&decl, "", 1);
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return decl.b;
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}
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else
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{
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string_delete (&decl);
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return NULL;
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}
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}
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static int
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get_count (type, count)
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const char **type;
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int *count;
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{
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if (!isdigit (**type))
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return 0;
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*count = **type - '0';
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*type += 1;
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/* see flush_repeats in cplus-method.c */
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if (isdigit (**type))
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{
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const char *p = *type;
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int n = *count;
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do
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{
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n *= 10;
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n += *p - '0';
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p += 1;
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}
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while (isdigit (*p));
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if (*p == '_')
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{
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*type = p + 1;
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*count = n;
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}
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}
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return 1;
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}
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/* result will be initialised here; it will be freed on failure */
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static int
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do_type (type, result, arg_mode)
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const char **type;
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string *result;
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int arg_mode;
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{
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int n;
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int done;
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int non_empty = 0;
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int success;
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string decl;
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const char *remembered_type;
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string_init (&decl);
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string_init (result);
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done = 0;
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success = 1;
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while (success && !done)
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{
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int member;
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switch (**type)
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{
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case 'Q':
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n = (*type)[1] - '0';
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if (n < 0 || n > 9)
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success = 0;
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*type += 2;
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while (n-- > 0)
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do_type (type, result, arg_mode);
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break;
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case 'P':
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*type += 1;
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string_prepend (&decl, "*");
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break;
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case 'R':
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*type += 1;
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string_prepend (&decl, "&");
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break;
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case 'T':
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*type += 1;
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if (!get_count (type, &n) || n >= ntypes)
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success = 0;
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else
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{
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remembered_type = typevec[n];
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type = &remembered_type;
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}
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break;
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case 'F':
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*type += 1;
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if (!string_empty (&decl) && decl.b[0] == '*')
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{
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string_prepend (&decl, "(");
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string_append (&decl, ")");
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}
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if (!do_args (type, &decl, arg_mode) || **type != '_')
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success = 0;
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else
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*type += 1;
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break;
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case 'M':
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case 'O':
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{
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int constp = 0;
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int volatilep = 0;
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member = **type == 'M';
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*type += 1;
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if (!isdigit (**type))
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{
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success = 0;
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break;
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}
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n = 0;
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do
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{
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n *= 10;
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n += **type - '0';
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*type += 1;
|
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}
|
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while (isdigit (**type));
|
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if (strlen (*type) < n)
|
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{
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success = 0;
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break;
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}
|
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string_append (&decl, ")");
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string_prepend (&decl, "::");
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string_prependn (&decl, *type, n);
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string_prepend (&decl, "(");
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*type += n;
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if (member)
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{
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if (**type == 'C')
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{
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*type += 1;
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constp = 1;
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}
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if (**type == 'V')
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{
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*type += 1;
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volatilep = 1;
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}
|
|
if (*(*type)++ != 'F')
|
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{
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success = 0;
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break;
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}
|
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}
|
|
if ((member && !do_args (type, &decl, arg_mode)) || **type != '_')
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{
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success = 0;
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break;
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}
|
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*type += 1;
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if (! print_ansi_qualifiers)
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break;
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if (constp)
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{
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if (non_empty)
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string_append (&decl, " ");
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else
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non_empty = 1;
|
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string_append (&decl, "const");
|
|
}
|
|
if (volatilep)
|
|
{
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|
if (non_empty)
|
|
string_append (&decl, " ");
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|
else
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non_empty = 1;
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|
string_append (&decl, "volatile");
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'C':
|
|
if ((*type)[1] == 'P')
|
|
{
|
|
*type += 1;
|
|
if (print_ansi_qualifiers)
|
|
{
|
|
if (!string_empty (&decl))
|
|
string_prepend (&decl, " ");
|
|
string_prepend (&decl, "const");
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* fall through */
|
|
default:
|
|
done = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
done = 0;
|
|
non_empty = 0;
|
|
while (success && !done)
|
|
{
|
|
switch (**type)
|
|
{
|
|
case 'C':
|
|
*type += 1;
|
|
if (print_ansi_qualifiers)
|
|
{
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
else
|
|
non_empty = 1;
|
|
string_append (result, "const");
|
|
}
|
|
break;
|
|
case 'U':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
else
|
|
non_empty = 1;
|
|
string_append (result, "unsigned");
|
|
break;
|
|
case 'V':
|
|
*type += 1;
|
|
if (print_ansi_qualifiers)
|
|
{
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
else
|
|
non_empty = 1;
|
|
string_append (result, "volatile");
|
|
}
|
|
break;
|
|
default:
|
|
done = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (success)
|
|
switch (**type)
|
|
{
|
|
case '\0':
|
|
case '_':
|
|
break;
|
|
case 'v':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "void");
|
|
break;
|
|
case 'x':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "long long");
|
|
break;
|
|
case 'l':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "long");
|
|
break;
|
|
case 'i':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "int");
|
|
break;
|
|
case 's':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "short");
|
|
break;
|
|
case 'c':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "char");
|
|
break;
|
|
case 'r':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "long double");
|
|
break;
|
|
case 'd':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "double");
|
|
break;
|
|
case 'f':
|
|
*type += 1;
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_append (result, "float");
|
|
break;
|
|
case 'G':
|
|
*type += 1;
|
|
if (!isdigit (**type))
|
|
{
|
|
success = 0;
|
|
break;
|
|
}
|
|
/* fall through */
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
n = 0;
|
|
do
|
|
{
|
|
n *= 10;
|
|
n += **type - '0';
|
|
*type += 1;
|
|
}
|
|
while (isdigit (**type));
|
|
if (strlen (*type) < n)
|
|
{
|
|
success = 0;
|
|
break;
|
|
}
|
|
if (non_empty)
|
|
string_append (result, " ");
|
|
string_appendn (result, *type, n);
|
|
*type += n;
|
|
break;
|
|
default:
|
|
success = 0;
|
|
break;
|
|
}
|
|
|
|
if (success)
|
|
{
|
|
if (!string_empty (&decl))
|
|
{
|
|
string_append (result, " ");
|
|
string_appends (result, &decl);
|
|
}
|
|
string_delete (&decl);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
string_delete (&decl);
|
|
string_delete (result);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* `result' will be initialised in do_type; it will be freed on failure */
|
|
|
|
static int
|
|
do_arg (type, result, arg_mode)
|
|
const char **type;
|
|
string *result;
|
|
int arg_mode;
|
|
{
|
|
const char *start = *type;
|
|
|
|
if (!do_type (type, result, arg_mode))
|
|
return 0;
|
|
remember_type (start, *type - start);
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
remember_type (start, len)
|
|
const char *start;
|
|
int len;
|
|
{
|
|
char *tem;
|
|
|
|
if (ntypes >= typevec_size)
|
|
{
|
|
if (typevec_size == 0)
|
|
{
|
|
typevec_size = 3;
|
|
typevec = (char **) xmalloc (sizeof (char*)*typevec_size);
|
|
}
|
|
else
|
|
{
|
|
typevec_size *= 2;
|
|
typevec = (char **) xrealloc ((char *)typevec, sizeof (char*)*typevec_size);
|
|
}
|
|
}
|
|
tem = (char *) xmalloc (len + 1);
|
|
memcpy (tem, start, len);
|
|
tem[len] = '\0';
|
|
typevec[ntypes++] = tem;
|
|
}
|
|
|
|
/* `decl' must be already initialised, usually non-empty;
|
|
it won't be freed on failure */
|
|
|
|
static int
|
|
do_args (type, decl, arg_mode)
|
|
const char **type;
|
|
string *decl;
|
|
int arg_mode;
|
|
{
|
|
string arg;
|
|
int need_comma = 0;
|
|
|
|
if (print_arg_types)
|
|
string_append (decl, "(");
|
|
|
|
while (**type != '_' && **type != '\0' && **type != 'e' && **type != 'v')
|
|
{
|
|
if (**type == 'N')
|
|
{
|
|
int r;
|
|
int t;
|
|
*type += 1;
|
|
if (!get_count (type, &r) || !get_count (type, &t) || t >= ntypes)
|
|
return 0;
|
|
while (--r >= 0)
|
|
{
|
|
const char *tem = typevec[t];
|
|
if (need_comma && print_arg_types)
|
|
string_append (decl, ", ");
|
|
if (!do_arg (&tem, &arg, arg_mode))
|
|
return 0;
|
|
if (print_arg_types)
|
|
string_appends (decl, &arg);
|
|
string_delete (&arg);
|
|
need_comma = 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (need_comma & print_arg_types)
|
|
string_append (decl, ", ");
|
|
if (!do_arg (type, &arg, arg_mode))
|
|
return 0;
|
|
if (print_arg_types)
|
|
string_appends (decl, &arg);
|
|
string_delete (&arg);
|
|
need_comma = 1;
|
|
}
|
|
}
|
|
|
|
if (**type == 'v')
|
|
*type += 1;
|
|
else if (**type == 'e')
|
|
{
|
|
*type += 1;
|
|
if (print_arg_types)
|
|
{
|
|
if (need_comma)
|
|
string_append (decl, ",");
|
|
string_append (decl, "...");
|
|
}
|
|
}
|
|
|
|
if (print_arg_types)
|
|
string_append (decl, ")");
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
munge_function_name (name, arg_mode)
|
|
string *name;
|
|
int arg_mode;
|
|
{
|
|
if (!string_empty (name) && name->p - name->b >= 3
|
|
&& name->b[0] == 'o' && name->b[1] == 'p' && name->b[2] == CPLUS_MARKER)
|
|
{
|
|
int i;
|
|
/* see if it's an assignment expression */
|
|
if (name->p - name->b >= 10 /* op$assign_ */
|
|
&& memcmp (name->b + 3, "assign_", 7) == 0)
|
|
{
|
|
for (i = 0; i < sizeof (optable)/sizeof (optable[0]); i++)
|
|
{
|
|
int len = name->p - name->b - 10;
|
|
if (strlen (optable[i].in) == len
|
|
&& memcmp (optable[i].in, name->b + 10, len) == 0)
|
|
{
|
|
string_clear (name);
|
|
string_append (name, "operator");
|
|
string_append (name, optable[i].out);
|
|
string_append (name, "=");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (i = 0; i < sizeof (optable)/sizeof (optable[0]); i++)
|
|
{
|
|
int len = name->p - name->b - 3;
|
|
if (strlen (optable[i].in) == len
|
|
&& memcmp (optable[i].in, name->b + 3, len) == 0)
|
|
{
|
|
string_clear (name);
|
|
string_append (name, "operator");
|
|
string_append (name, optable[i].out);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
else if (!string_empty (name) && name->p - name->b >= 5
|
|
&& memcmp (name->b, "type$", 5) == 0)
|
|
{
|
|
/* type conversion operator */
|
|
string type;
|
|
const char *tem = name->b + 5;
|
|
if (do_type (&tem, &type, arg_mode))
|
|
{
|
|
string_clear (name);
|
|
string_append (name, "operator ");
|
|
string_appends (name, &type);
|
|
string_delete (&type);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* a mini string-handling package */
|
|
|
|
static void
|
|
string_need (s, n)
|
|
string *s;
|
|
int n;
|
|
{
|
|
if (s->b == NULL)
|
|
{
|
|
if (n < 32)
|
|
n = 32;
|
|
s->p = s->b = (char *) xmalloc (n);
|
|
s->e = s->b + n;
|
|
}
|
|
else if (s->e - s->p < n)
|
|
{
|
|
int tem = s->p - s->b;
|
|
n += tem;
|
|
n *= 2;
|
|
s->b = (char *) xrealloc (s->b, n);
|
|
s->p = s->b + tem;
|
|
s->e = s->b + n;
|
|
}
|
|
}
|
|
|
|
static void
|
|
string_delete (s)
|
|
string *s;
|
|
{
|
|
if (s->b != NULL)
|
|
{
|
|
free (s->b);
|
|
s->b = s->e = s->p = NULL;
|
|
}
|
|
}
|
|
|
|
static void
|
|
string_init (s)
|
|
string *s;
|
|
{
|
|
s->b = s->p = s->e = NULL;
|
|
}
|
|
|
|
static void
|
|
string_clear (s)
|
|
string *s;
|
|
{
|
|
s->p = s->b;
|
|
}
|
|
|
|
static int
|
|
string_empty (s)
|
|
string *s;
|
|
{
|
|
return s->b == s->p;
|
|
}
|
|
|
|
static void
|
|
string_append (p, s)
|
|
string *p;
|
|
const char *s;
|
|
{
|
|
int n;
|
|
if (s == NULL || *s == '\0')
|
|
return;
|
|
n = strlen (s);
|
|
string_need (p, n);
|
|
memcpy (p->p, s, n);
|
|
p->p += n;
|
|
}
|
|
|
|
static void
|
|
string_appends (p, s)
|
|
string *p, *s;
|
|
{
|
|
int n;
|
|
if (s->b == s->p)
|
|
return;
|
|
n = s->p - s->b;
|
|
string_need (p, n);
|
|
memcpy (p->p, s->b, n);
|
|
p->p += n;
|
|
}
|
|
|
|
static void
|
|
string_appendn (p, s, n)
|
|
string *p;
|
|
const char *s;
|
|
int n;
|
|
{
|
|
if (n == 0)
|
|
return;
|
|
string_need (p, n);
|
|
memcpy (p->p, s, n);
|
|
p->p += n;
|
|
}
|
|
|
|
static void
|
|
string_prepend (p, s)
|
|
string *p;
|
|
const char *s;
|
|
{
|
|
if (s == NULL || *s == '\0')
|
|
return;
|
|
string_prependn (p, s, strlen (s));
|
|
}
|
|
|
|
#if 0
|
|
static void
|
|
string_prepends (p, s)
|
|
string *p, *s;
|
|
{
|
|
if (s->b == s->p)
|
|
return;
|
|
string_prependn (p, s->b, s->p - s->b);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
string_prependn (p, s, n)
|
|
string *p;
|
|
const char *s;
|
|
int n;
|
|
{
|
|
char *q;
|
|
|
|
if (n == 0)
|
|
return;
|
|
string_need (p, n);
|
|
for (q = p->p - 1; q >= p->b; q--)
|
|
q[n] = q[0];
|
|
memcpy (p->b, s, n);
|
|
p->p += n;
|
|
}
|