/* General utility routines for GDB, the GNU debugger.
- Copyright (C) 1986 Free Software Foundation, Inc.
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
-
-#include <stdio.h>
-#include <signal.h>
-#include <sys/ioctl.h>
+ Copyright 1986, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
#include "defs.h"
-#include "param.h"
-#ifdef HAVE_TERMIO
-#include <termio.h>
+#if !defined(__GO32__)
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <pwd.h>
#endif
+#include <varargs.h>
+#include <ctype.h>
+#include <string.h>
+
+#include "signals.h"
+#include "gdbcmd.h"
+#include "terminal.h"
+#include "bfd.h"
+#include "target.h"
+#include "demangle.h"
+#include "expression.h"
+#include "language.h"
+
+/* Prototypes for local functions */
+
+#if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK)
+#else
+
+static void
+malloc_botch PARAMS ((void));
-void error ();
-void fatal ();
+#endif /* NO_MMALLOC, etc */
+
+static void
+fatal_dump_core (); /* Can't prototype with <varargs.h> usage... */
+
+static void
+prompt_for_continue PARAMS ((void));
+
+static void
+set_width_command PARAMS ((char *, int, struct cmd_list_element *));
+
+/* If this definition isn't overridden by the header files, assume
+ that isatty and fileno exist on this system. */
+#ifndef ISATTY
+#define ISATTY(FP) (isatty (fileno (FP)))
+#endif
/* Chain of cleanup actions established with make_cleanup,
to be executed if an error happens. */
rather than waiting until QUIT is executed. */
int immediate_quit;
+
+/* Nonzero means that encoded C++ names should be printed out in their
+ C++ form rather than raw. */
+
+int demangle = 1;
+
+/* Nonzero means that encoded C++ names should be printed out in their
+ C++ form even in assembler language displays. If this is set, but
+ DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */
+
+int asm_demangle = 0;
+
+/* Nonzero means that strings with character values >0x7F should be printed
+ as octal escapes. Zero means just print the value (e.g. it's an
+ international character, and the terminal or window can cope.) */
+
+int sevenbit_strings = 0;
+
+/* String to be printed before error messages, if any. */
+
+char *error_pre_print;
+char *warning_pre_print = "\nwarning: ";
\f
/* Add a new cleanup to the cleanup_chain,
and return the previous chain pointer
struct cleanup *
make_cleanup (function, arg)
- void (*function) ();
- int arg;
+ void (*function) PARAMS ((PTR));
+ PTR arg;
{
register struct cleanup *new
= (struct cleanup *) xmalloc (sizeof (struct cleanup));
register struct cleanup *ptr;
while ((ptr = cleanup_chain) != old_chain)
{
+ cleanup_chain = ptr->next; /* Do this first incase recursion */
(*ptr->function) (ptr->arg);
- cleanup_chain = ptr->next;
free (ptr);
}
}
while ((ptr = cleanup_chain) != old_chain)
{
cleanup_chain = ptr->next;
- free (ptr);
+ free ((PTR)ptr);
}
}
+/* Set the cleanup_chain to 0, and return the old cleanup chain. */
+struct cleanup *
+save_cleanups ()
+{
+ struct cleanup *old_chain = cleanup_chain;
+
+ cleanup_chain = 0;
+ return old_chain;
+}
+
+/* Restore the cleanup chain from a previously saved chain. */
+void
+restore_cleanups (chain)
+ struct cleanup *chain;
+{
+ cleanup_chain = chain;
+}
+
/* This function is useful for cleanups.
Do
{
free (*location);
}
+
+/* Provide a known function that does nothing, to use as a base for
+ for a possibly long chain of cleanups. This is useful where we
+ use the cleanup chain for handling normal cleanups as well as dealing
+ with cleanups that need to be done as a result of a call to error().
+ In such cases, we may not be certain where the first cleanup is, unless
+ we have a do-nothing one to always use as the base. */
+
+/* ARGSUSED */
+void
+null_cleanup (arg)
+ char **arg;
+{
+}
+
\f
-/* Generally useful subroutines used throughout the program. */
+/* Provide a hook for modules wishing to print their own warning messages
+ to set up the terminal state in a compatible way, without them having
+ to import all the target_<...> macros. */
+
+void
+warning_setup ()
+{
+ target_terminal_ours ();
+ wrap_here(""); /* Force out any buffered output */
+ fflush (stdout);
+}
-/* Like malloc but get error if no storage available. */
+/* Print a warning message.
+ The first argument STRING is the warning message, used as a fprintf string,
+ and the remaining args are passed as arguments to it.
+ The primary difference between warnings and errors is that a warning
+ does not force the return to command level. */
+
+/* VARARGS */
+void
+warning (va_alist)
+ va_dcl
+{
+ va_list args;
+ char *string;
+
+ va_start (args);
+ target_terminal_ours ();
+ wrap_here(""); /* Force out any buffered output */
+ fflush (stdout);
+ if (warning_pre_print)
+ fprintf (stderr, warning_pre_print);
+ string = va_arg (args, char *);
+ vfprintf (stderr, string, args);
+ fprintf (stderr, "\n");
+ va_end (args);
+}
+
+/* Print an error message and return to command level.
+ The first argument STRING is the error message, used as a fprintf string,
+ and the remaining args are passed as arguments to it. */
+
+/* VARARGS */
+NORETURN void
+error (va_alist)
+ va_dcl
+{
+ va_list args;
+ char *string;
+
+ va_start (args);
+ target_terminal_ours ();
+ wrap_here(""); /* Force out any buffered output */
+ fflush (stdout);
+ if (error_pre_print)
+ fprintf_filtered (stderr, error_pre_print);
+ string = va_arg (args, char *);
+ vfprintf_filtered (stderr, string, args);
+ fprintf_filtered (stderr, "\n");
+ va_end (args);
+ return_to_top_level ();
+}
+
+/* Print an error message and exit reporting failure.
+ This is for a error that we cannot continue from.
+ The arguments are printed a la printf.
+
+ This function cannot be declared volatile (NORETURN) in an
+ ANSI environment because exit() is not declared volatile. */
+
+/* VARARGS */
+NORETURN void
+fatal (va_alist)
+ va_dcl
+{
+ va_list args;
+ char *string;
+
+ va_start (args);
+ string = va_arg (args, char *);
+ fprintf (stderr, "\ngdb: ");
+ vfprintf (stderr, string, args);
+ fprintf (stderr, "\n");
+ va_end (args);
+ exit (1);
+}
+
+/* Print an error message and exit, dumping core.
+ The arguments are printed a la printf (). */
+
+/* VARARGS */
+static void
+fatal_dump_core (va_alist)
+ va_dcl
+{
+ va_list args;
+ char *string;
+
+ va_start (args);
+ string = va_arg (args, char *);
+ /* "internal error" is always correct, since GDB should never dump
+ core, no matter what the input. */
+ fprintf (stderr, "\ngdb internal error: ");
+ vfprintf (stderr, string, args);
+ fprintf (stderr, "\n");
+ va_end (args);
+
+ signal (SIGQUIT, SIG_DFL);
+ kill (getpid (), SIGQUIT);
+ /* We should never get here, but just in case... */
+ exit (1);
+}
+
+/* The strerror() function can return NULL for errno values that are
+ out of range. Provide a "safe" version that always returns a
+ printable string. */
char *
-xmalloc (size)
- long size;
+safe_strerror (errnum)
+ int errnum;
{
- register char *val = (char *) malloc (size);
- if (!val)
- fatal ("virtual memory exhausted.", 0);
- return val;
+ char *msg;
+ static char buf[32];
+
+ if ((msg = strerror (errnum)) == NULL)
+ {
+ sprintf (buf, "(undocumented errno %d)", errnum);
+ msg = buf;
+ }
+ return (msg);
}
-/* Like realloc but get error if no storage available. */
+/* The strsignal() function can return NULL for signal values that are
+ out of range. Provide a "safe" version that always returns a
+ printable string. */
char *
-xrealloc (ptr, size)
- char *ptr;
- long size;
+safe_strsignal (signo)
+ int signo;
{
- register char *val = (char *) realloc (ptr, size);
- if (!val)
- fatal ("virtual memory exhausted.", 0);
- return val;
+ char *msg;
+ static char buf[32];
+
+ if ((msg = strsignal (signo)) == NULL)
+ {
+ sprintf (buf, "(undocumented signal %d)", signo);
+ msg = buf;
+ }
+ return (msg);
}
+
/* Print the system error message for errno, and also mention STRING
as the file name for which the error was encountered.
Then return to command level. */
perror_with_name (string)
char *string;
{
- extern int sys_nerr;
- extern char *sys_errlist[];
- extern int errno;
char *err;
char *combined;
- if (errno < sys_nerr)
- err = sys_errlist[errno];
- else
- err = "unknown error";
-
+ err = safe_strerror (errno);
combined = (char *) alloca (strlen (err) + strlen (string) + 3);
strcpy (combined, string);
strcat (combined, ": ");
strcat (combined, err);
+ /* I understand setting these is a matter of taste. Still, some people
+ may clear errno but not know about bfd_error. Doing this here is not
+ unreasonable. */
+ bfd_error = no_error;
+ errno = 0;
+
error ("%s.", combined);
}
char *string;
int errcode;
{
- extern int sys_nerr;
- extern char *sys_errlist[];
char *err;
char *combined;
- if (errcode < sys_nerr)
- err = sys_errlist[errcode];
- else
- err = "unknown error";
-
+ err = safe_strerror (errcode);
combined = (char *) alloca (strlen (err) + strlen (string) + 3);
strcpy (combined, string);
strcat (combined, ": ");
strcat (combined, err);
- printf ("%s.\n", combined);
+ fprintf (stderr, "%s.\n", combined);
}
+/* Control C eventually causes this to be called, at a convenient time. */
+
void
quit ()
{
- fflush (stdout);
+ target_terminal_ours ();
+ wrap_here ((char *)0); /* Force out any pending output */
+#if !defined(__GO32__)
#ifdef HAVE_TERMIO
ioctl (fileno (stdout), TCFLSH, 1);
#else /* not HAVE_TERMIO */
#else
error ("Quit (expect signal %d when inferior is resumed)", SIGINT);
#endif /* TIOCGPGRP */
+#else
+ error ("Quit");
+#endif
}
+
+#ifdef __GO32__
+
+/* In the absence of signals, poll keyboard for a quit.
+ Called from #define QUIT pollquit() in xm-go32.h. */
+
+void
+pollquit()
+{
+ if (kbhit ())
+ {
+ int k = getkey ();
+ if (k == 1)
+ quit_flag = 1;
+ else if (k == 2)
+ immediate_quit = 1;
+ quit ();
+ }
+}
+
+#endif
+
/* Control C comes here */
void
-request_quit ()
+request_quit (signo)
+ int signo;
{
quit_flag = 1;
+
+#ifdef USG
+ /* Restore the signal handler. */
+ signal (signo, request_quit);
+#endif
+
if (immediate_quit)
quit ();
}
-/* Print an error message and return to command level.
- STRING is the error message, used as a fprintf string,
- and ARG is passed as an argument to it. */
+\f
+/* Memory management stuff (malloc friends). */
+
+#if defined (NO_MMALLOC)
+
+PTR
+mmalloc (md, size)
+ PTR md;
+ long size;
+{
+ return (malloc (size));
+}
+
+PTR
+mrealloc (md, ptr, size)
+ PTR md;
+ PTR ptr;
+ long size;
+{
+ if (ptr == 0) /* Guard against old realloc's */
+ return malloc (size);
+ else
+ return realloc (ptr, size);
+}
void
-error (string, arg1, arg2, arg3)
- char *string;
- int arg1, arg2, arg3;
+mfree (md, ptr)
+ PTR md;
+ PTR ptr;
{
- fflush (stdout);
- fprintf (stderr, string, arg1, arg2, arg3);
- fprintf (stderr, "\n");
- return_to_top_level ();
+ free (ptr);
}
-/* Print an error message and exit reporting failure.
- This is for a error that we cannot continue from.
- STRING and ARG are passed to fprintf. */
+#endif /* NO_MMALLOC */
+
+#if defined (NO_MMALLOC) || defined (NO_MMALLOC_CHECK)
void
-fatal (string, arg)
- char *string;
- int arg;
+init_malloc (md)
+ PTR md;
{
- fprintf (stderr, "gdb: ");
- fprintf (stderr, string, arg);
- fprintf (stderr, "\n");
- exit (1);
}
+#else /* have mmalloc and want corruption checking */
+
+static void
+malloc_botch ()
+{
+ fatal_dump_core ("Memory corruption");
+}
+
+/* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified
+ by MD, to detect memory corruption. Note that MD may be NULL to specify
+ the default heap that grows via sbrk.
+
+ Note that for freshly created regions, we must call mmcheck prior to any
+ mallocs in the region. Otherwise, any region which was allocated prior to
+ installing the checking hooks, which is later reallocated or freed, will
+ fail the checks! The mmcheck function only allows initial hooks to be
+ installed before the first mmalloc. However, anytime after we have called
+ mmcheck the first time to install the checking hooks, we can call it again
+ to update the function pointer to the memory corruption handler.
+
+ Returns zero on failure, non-zero on success. */
+
+void
+init_malloc (md)
+ PTR md;
+{
+ if (!mmcheck (md, malloc_botch))
+ {
+ warning ("internal error: failed to install memory consistency checks");
+ }
+
+ mmtrace ();
+}
+
+#endif /* Have mmalloc and want corruption checking */
+
+/* Called when a memory allocation fails, with the number of bytes of
+ memory requested in SIZE. */
+
+NORETURN void
+nomem (size)
+ long size;
+{
+ if (size > 0)
+ {
+ fatal ("virtual memory exhausted: can't allocate %ld bytes.", size);
+ }
+ else
+ {
+ fatal ("virtual memory exhausted.");
+ }
+}
+
+/* Like mmalloc but get error if no storage available, and protect against
+ the caller wanting to allocate zero bytes. Whether to return NULL for
+ a zero byte request, or translate the request into a request for one
+ byte of zero'd storage, is a religious issue. */
+
+PTR
+xmmalloc (md, size)
+ PTR md;
+ long size;
+{
+ register PTR val;
+
+ if (size == 0)
+ {
+ val = NULL;
+ }
+ else if ((val = mmalloc (md, size)) == NULL)
+ {
+ nomem (size);
+ }
+ return (val);
+}
+
+/* Like mrealloc but get error if no storage available. */
+
+PTR
+xmrealloc (md, ptr, size)
+ PTR md;
+ PTR ptr;
+ long size;
+{
+ register PTR val;
+
+ if (ptr != NULL)
+ {
+ val = mrealloc (md, ptr, size);
+ }
+ else
+ {
+ val = mmalloc (md, size);
+ }
+ if (val == NULL)
+ {
+ nomem (size);
+ }
+ return (val);
+}
+
+/* Like malloc but get error if no storage available, and protect against
+ the caller wanting to allocate zero bytes. */
+
+PTR
+xmalloc (size)
+ long size;
+{
+ return (xmmalloc ((void *) NULL, size));
+}
+
+/* Like mrealloc but get error if no storage available. */
+
+PTR
+xrealloc (ptr, size)
+ PTR ptr;
+ long size;
+{
+ return (xmrealloc ((void *) NULL, ptr, size));
+}
+
+\f
+/* My replacement for the read system call.
+ Used like `read' but keeps going if `read' returns too soon. */
+
+int
+myread (desc, addr, len)
+ int desc;
+ char *addr;
+ int len;
+{
+ register int val;
+ int orglen = len;
+
+ while (len > 0)
+ {
+ val = read (desc, addr, len);
+ if (val < 0)
+ return val;
+ if (val == 0)
+ return orglen - len;
+ len -= val;
+ addr += val;
+ }
+ return orglen;
+}
+\f
/* Make a copy of the string at PTR with SIZE characters
(and add a null character at the end in the copy).
Uses malloc to get the space. Returns the address of the copy. */
char *
savestring (ptr, size)
- char *ptr;
+ const char *ptr;
int size;
{
register char *p = (char *) xmalloc (size + 1);
- bcopy (ptr, p, size);
+ memcpy (p, ptr, size);
p[size] = 0;
return p;
}
char *
-concat (s1, s2, s3)
- char *s1, *s2, *s3;
+msavestring (md, ptr, size)
+ void *md;
+ const char *ptr;
+ int size;
{
- register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
- register char *val = (char *) xmalloc (len);
- strcpy (val, s1);
- strcat (val, s2);
- strcat (val, s3);
- return val;
+ register char *p = (char *) xmmalloc (md, size + 1);
+ memcpy (p, ptr, size);
+ p[size] = 0;
+ return p;
+}
+
+/* The "const" is so it compiles under DGUX (which prototypes strsave
+ in <string.h>. FIXME: This should be named "xstrsave", shouldn't it?
+ Doesn't real strsave return NULL if out of memory? */
+char *
+strsave (ptr)
+ const char *ptr;
+{
+ return savestring (ptr, strlen (ptr));
+}
+
+char *
+mstrsave (md, ptr)
+ void *md;
+ const char *ptr;
+{
+ return (msavestring (md, ptr, strlen (ptr)));
}
void
The first, a control string, should end in "? ".
It should not say how to answer, because we do that. */
+/* VARARGS */
int
-query (ctlstr, arg1, arg2)
- char *ctlstr;
+query (va_alist)
+ va_dcl
{
+ va_list args;
+ char *ctlstr;
register int answer;
+ register int ans2;
/* Automatically answer "yes" if input is not from a terminal. */
if (!input_from_terminal_p ())
while (1)
{
- printf (ctlstr, arg1, arg2);
- printf ("(y or n) ");
+ wrap_here (""); /* Flush any buffered output */
+ fflush (stdout);
+ va_start (args);
+ ctlstr = va_arg (args, char *);
+ vfprintf_filtered (stdout, ctlstr, args);
+ va_end (args);
+ printf_filtered ("(y or n) ");
fflush (stdout);
answer = fgetc (stdin);
clearerr (stdin); /* in case of C-d */
- if (answer != '\n')
- while (fgetc (stdin) != '\n') clearerr (stdin);
+ if (answer == EOF) /* C-d */
+ return 1;
+ if (answer != '\n') /* Eat rest of input line, to EOF or newline */
+ do
+ {
+ ans2 = fgetc (stdin);
+ clearerr (stdin);
+ }
+ while (ans2 != EOF && ans2 != '\n');
if (answer >= 'a')
answer -= 040;
if (answer == 'Y')
return 1;
if (answer == 'N')
return 0;
- printf ("Please answer y or n.\n");
+ printf_filtered ("Please answer y or n.\n");
}
}
+
\f
/* Parse a C escape sequence. STRING_PTR points to a variable
containing a pointer to the string to parse. That pointer
+ should point to the character after the \. That pointer
is updated past the characters we use. The value of the
escape sequence is returned.
switch (c)
{
case 'a':
- return '\a';
+ return 007; /* Bell (alert) char */
case 'b':
return '\b';
- case 'e':
+ case 'e': /* Escape character */
return 033;
case 'f':
return '\f';
}
}
\f
-/* Print the character CH on STREAM as part of the contents
- of a literal string whose delimiter is QUOTER. */
+/* Print the character C on STREAM as part of the contents of a literal
+ string whose delimiter is QUOTER. Note that this routine should only
+ be call for printing things which are independent of the language
+ of the program being debugged. */
void
-printchar (ch, stream, quoter)
- unsigned char ch;
+gdb_printchar (c, stream, quoter)
+ register int c;
FILE *stream;
int quoter;
{
- register int c = ch;
- if (c < 040 || c >= 0177)
+
+ c &= 0xFF; /* Avoid sign bit follies */
+
+ if ( c < 0x20 || /* Low control chars */
+ (c >= 0x7F && c < 0xA0) || /* DEL, High controls */
+ (sevenbit_strings && c >= 0x80)) { /* high order bit set */
+ switch (c)
+ {
+ case '\n':
+ fputs_filtered ("\\n", stream);
+ break;
+ case '\b':
+ fputs_filtered ("\\b", stream);
+ break;
+ case '\t':
+ fputs_filtered ("\\t", stream);
+ break;
+ case '\f':
+ fputs_filtered ("\\f", stream);
+ break;
+ case '\r':
+ fputs_filtered ("\\r", stream);
+ break;
+ case '\033':
+ fputs_filtered ("\\e", stream);
+ break;
+ case '\007':
+ fputs_filtered ("\\a", stream);
+ break;
+ default:
+ fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
+ break;
+ }
+ } else {
+ if (c == '\\' || c == quoter)
+ fputs_filtered ("\\", stream);
+ fprintf_filtered (stream, "%c", c);
+ }
+}
+\f
+/* Number of lines per page or UINT_MAX if paging is disabled. */
+static unsigned int lines_per_page;
+/* Number of chars per line or UNIT_MAX is line folding is disabled. */
+static unsigned int chars_per_line;
+/* Current count of lines printed on this page, chars on this line. */
+static unsigned int lines_printed, chars_printed;
+
+/* Buffer and start column of buffered text, for doing smarter word-
+ wrapping. When someone calls wrap_here(), we start buffering output
+ that comes through fputs_filtered(). If we see a newline, we just
+ spit it out and forget about the wrap_here(). If we see another
+ wrap_here(), we spit it out and remember the newer one. If we see
+ the end of the line, we spit out a newline, the indent, and then
+ the buffered output.
+
+ wrap_column is the column number on the screen where wrap_buffer begins.
+ When wrap_column is zero, wrapping is not in effect.
+ wrap_buffer is malloc'd with chars_per_line+2 bytes.
+ When wrap_buffer[0] is null, the buffer is empty.
+ wrap_pointer points into it at the next character to fill.
+ wrap_indent is the string that should be used as indentation if the
+ wrap occurs. */
+
+static char *wrap_buffer, *wrap_pointer, *wrap_indent;
+static int wrap_column;
+
+/* ARGSUSED */
+static void
+set_width_command (args, from_tty, c)
+ char *args;
+ int from_tty;
+ struct cmd_list_element *c;
+{
+ if (!wrap_buffer)
{
- if (c == '\n')
- fprintf (stream, "\\n");
- else if (c == '\b')
- fprintf (stream, "\\b");
- else if (c == '\t')
- fprintf (stream, "\\t");
- else if (c == '\f')
- fprintf (stream, "\\f");
- else if (c == '\r')
- fprintf (stream, "\\r");
- else if (c == 033)
- fprintf (stream, "\\e");
- else if (c == '\a')
- fprintf (stream, "\\a");
- else
- fprintf (stream, "\\%03o", c);
+ wrap_buffer = (char *) xmalloc (chars_per_line + 2);
+ wrap_buffer[0] = '\0';
+ }
+ else
+ wrap_buffer = (char *) xrealloc (wrap_buffer, chars_per_line + 2);
+ wrap_pointer = wrap_buffer; /* Start it at the beginning */
+}
+
+/* Wait, so the user can read what's on the screen. Prompt the user
+ to continue by pressing RETURN. */
+
+static void
+prompt_for_continue ()
+{
+ char *ignore;
+
+ /* We must do this *before* we call gdb_readline, else it will eventually
+ call us -- thinking that we're trying to print beyond the end of the
+ screen. */
+ reinitialize_more_filter ();
+
+ immediate_quit++;
+ ignore = gdb_readline ("---Type <return> to continue---");
+ if (ignore)
+ free (ignore);
+ immediate_quit--;
+
+ /* Now we have to do this again, so that GDB will know that it doesn't
+ need to save the ---Type <return>--- line at the top of the screen. */
+ reinitialize_more_filter ();
+
+ dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
+}
+
+/* Reinitialize filter; ie. tell it to reset to original values. */
+
+void
+reinitialize_more_filter ()
+{
+ lines_printed = 0;
+ chars_printed = 0;
+}
+
+/* Indicate that if the next sequence of characters overflows the line,
+ a newline should be inserted here rather than when it hits the end.
+ If INDENT is nonzero, it is a string to be printed to indent the
+ wrapped part on the next line. INDENT must remain accessible until
+ the next call to wrap_here() or until a newline is printed through
+ fputs_filtered().
+
+ If the line is already overfull, we immediately print a newline and
+ the indentation, and disable further wrapping.
+
+ If we don't know the width of lines, but we know the page height,
+ we must not wrap words, but should still keep track of newlines
+ that were explicitly printed.
+
+ INDENT should not contain tabs, as that
+ will mess up the char count on the next line. FIXME. */
+
+void
+wrap_here(indent)
+ char *indent;
+{
+ if (wrap_buffer[0])
+ {
+ *wrap_pointer = '\0';
+ fputs (wrap_buffer, stdout);
+ }
+ wrap_pointer = wrap_buffer;
+ wrap_buffer[0] = '\0';
+ if (chars_per_line == UINT_MAX) /* No line overflow checking */
+ {
+ wrap_column = 0;
+ }
+ else if (chars_printed >= chars_per_line)
+ {
+ puts_filtered ("\n");
+ puts_filtered (indent);
+ wrap_column = 0;
}
else
{
- if (c == '\\' || c == quoter)
- fputc ('\\', stream);
- fputc (c, stream);
+ wrap_column = chars_printed;
+ wrap_indent = indent;
+ }
+}
+
+/* Ensure that whatever gets printed next, using the filtered output
+ commands, starts at the beginning of the line. I.E. if there is
+ any pending output for the current line, flush it and start a new
+ line. Otherwise do nothing. */
+
+void
+begin_line ()
+{
+ if (chars_printed > 0)
+ {
+ puts_filtered ("\n");
+ }
+}
+
+/* Like fputs but pause after every screenful, and can wrap at points
+ other than the final character of a line.
+ Unlike fputs, fputs_filtered does not return a value.
+ It is OK for LINEBUFFER to be NULL, in which case just don't print
+ anything.
+
+ Note that a longjmp to top level may occur in this routine
+ (since prompt_for_continue may do so) so this routine should not be
+ called when cleanups are not in place. */
+
+void
+fputs_filtered (linebuffer, stream)
+ const char *linebuffer;
+ FILE *stream;
+{
+ const char *lineptr;
+
+ if (linebuffer == 0)
+ return;
+
+ /* Don't do any filtering if it is disabled. */
+ if (stream != stdout
+ || (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX))
+ {
+ fputs (linebuffer, stream);
+ return;
+ }
+
+ /* Go through and output each character. Show line extension
+ when this is necessary; prompt user for new page when this is
+ necessary. */
+
+ lineptr = linebuffer;
+ while (*lineptr)
+ {
+ /* Possible new page. */
+ if (lines_printed >= lines_per_page - 1)
+ prompt_for_continue ();
+
+ while (*lineptr && *lineptr != '\n')
+ {
+ /* Print a single line. */
+ if (*lineptr == '\t')
+ {
+ if (wrap_column)
+ *wrap_pointer++ = '\t';
+ else
+ putc ('\t', stream);
+ /* Shifting right by 3 produces the number of tab stops
+ we have already passed, and then adding one and
+ shifting left 3 advances to the next tab stop. */
+ chars_printed = ((chars_printed >> 3) + 1) << 3;
+ lineptr++;
+ }
+ else
+ {
+ if (wrap_column)
+ *wrap_pointer++ = *lineptr;
+ else
+ putc (*lineptr, stream);
+ chars_printed++;
+ lineptr++;
+ }
+
+ if (chars_printed >= chars_per_line)
+ {
+ unsigned int save_chars = chars_printed;
+
+ chars_printed = 0;
+ lines_printed++;
+ /* If we aren't actually wrapping, don't output newline --
+ if chars_per_line is right, we probably just overflowed
+ anyway; if it's wrong, let us keep going. */
+ if (wrap_column)
+ putc ('\n', stream);
+
+ /* Possible new page. */
+ if (lines_printed >= lines_per_page - 1)
+ prompt_for_continue ();
+
+ /* Now output indentation and wrapped string */
+ if (wrap_column)
+ {
+ if (wrap_indent)
+ fputs (wrap_indent, stream);
+ *wrap_pointer = '\0'; /* Null-terminate saved stuff */
+ fputs (wrap_buffer, stream); /* and eject it */
+ /* FIXME, this strlen is what prevents wrap_indent from
+ containing tabs. However, if we recurse to print it
+ and count its chars, we risk trouble if wrap_indent is
+ longer than (the user settable) chars_per_line.
+ Note also that this can set chars_printed > chars_per_line
+ if we are printing a long string. */
+ chars_printed = strlen (wrap_indent)
+ + (save_chars - wrap_column);
+ wrap_pointer = wrap_buffer; /* Reset buffer */
+ wrap_buffer[0] = '\0';
+ wrap_column = 0; /* And disable fancy wrap */
+ }
+ }
+ }
+
+ if (*lineptr == '\n')
+ {
+ chars_printed = 0;
+ wrap_here ((char *)0); /* Spit out chars, cancel further wraps */
+ lines_printed++;
+ putc ('\n', stream);
+ lineptr++;
+ }
+ }
+}
+
+/* Print a variable number of ARGS using format FORMAT. If this
+ information is going to put the amount written (since the last call
+ to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
+ print out a pause message and do a gdb_readline to get the users
+ permision to continue.
+
+ Unlike fprintf, this function does not return a value.
+
+ We implement three variants, vfprintf (takes a vararg list and stream),
+ fprintf (takes a stream to write on), and printf (the usual).
+
+ Note that this routine has a restriction that the length of the
+ final output line must be less than 255 characters *or* it must be
+ less than twice the size of the format string. This is a very
+ arbitrary restriction, but it is an internal restriction, so I'll
+ put it in. This means that the %s format specifier is almost
+ useless; unless the caller can GUARANTEE that the string is short
+ enough, fputs_filtered should be used instead.
+
+ Note also that a longjmp to top level may occur in this routine
+ (since prompt_for_continue may do so) so this routine should not be
+ called when cleanups are not in place. */
+
+#define MIN_LINEBUF 255
+
+void
+vfprintf_filtered (stream, format, args)
+ FILE *stream;
+ char *format;
+ va_list args;
+{
+ char line_buf[MIN_LINEBUF+10];
+ char *linebuffer = line_buf;
+ int format_length;
+
+ format_length = strlen (format);
+
+ /* Reallocate buffer to a larger size if this is necessary. */
+ if (format_length * 2 > MIN_LINEBUF)
+ {
+ linebuffer = alloca (10 + format_length * 2);
+ }
+
+ /* This won't blow up if the restrictions described above are
+ followed. */
+ vsprintf (linebuffer, format, args);
+
+ fputs_filtered (linebuffer, stream);
+}
+
+void
+vprintf_filtered (format, args)
+ char *format;
+ va_list args;
+{
+ vfprintf_filtered (stdout, format, args);
+}
+
+/* VARARGS */
+void
+fprintf_filtered (va_alist)
+ va_dcl
+{
+ va_list args;
+ FILE *stream;
+ char *format;
+
+ va_start (args);
+ stream = va_arg (args, FILE *);
+ format = va_arg (args, char *);
+
+ /* This won't blow up if the restrictions described above are
+ followed. */
+ vfprintf_filtered (stream, format, args);
+ va_end (args);
+}
+
+/* Like fprintf_filtered, but prints it's result indent.
+ Called as fprintfi_filtered (spaces, format, arg1, arg2, ...); */
+
+/* VARARGS */
+void
+fprintfi_filtered (va_alist)
+ va_dcl
+{
+ va_list args;
+ int spaces;
+ FILE *stream;
+ char *format;
+
+ va_start (args);
+ spaces = va_arg (args, int);
+ stream = va_arg (args, FILE *);
+ format = va_arg (args, char *);
+ print_spaces_filtered (spaces, stream);
+
+ /* This won't blow up if the restrictions described above are
+ followed. */
+ vfprintf_filtered (stream, format, args);
+ va_end (args);
+}
+
+/* VARARGS */
+void
+printf_filtered (va_alist)
+ va_dcl
+{
+ va_list args;
+ char *format;
+
+ va_start (args);
+ format = va_arg (args, char *);
+
+ vfprintf_filtered (stdout, format, args);
+ va_end (args);
+}
+
+/* Like printf_filtered, but prints it's result indented.
+ Called as printfi_filtered (spaces, format, arg1, arg2, ...); */
+
+/* VARARGS */
+void
+printfi_filtered (va_alist)
+ va_dcl
+{
+ va_list args;
+ int spaces;
+ char *format;
+
+ va_start (args);
+ spaces = va_arg (args, int);
+ format = va_arg (args, char *);
+ print_spaces_filtered (spaces, stdout);
+ vfprintf_filtered (stdout, format, args);
+ va_end (args);
+}
+
+/* Easy -- but watch out!
+
+ This routine is *not* a replacement for puts()! puts() appends a newline.
+ This one doesn't, and had better not! */
+
+void
+puts_filtered (string)
+ char *string;
+{
+ fputs_filtered (string, stdout);
+}
+
+/* Return a pointer to N spaces and a null. The pointer is good
+ until the next call to here. */
+char *
+n_spaces (n)
+ int n;
+{
+ register char *t;
+ static char *spaces;
+ static int max_spaces;
+
+ if (n > max_spaces)
+ {
+ if (spaces)
+ free (spaces);
+ spaces = (char *) xmalloc (n+1);
+ for (t = spaces+n; t != spaces;)
+ *--t = ' ';
+ spaces[n] = '\0';
+ max_spaces = n;
+ }
+
+ return spaces + max_spaces - n;
+}
+
+/* Print N spaces. */
+void
+print_spaces_filtered (n, stream)
+ int n;
+ FILE *stream;
+{
+ fputs_filtered (n_spaces (n), stream);
+}
+\f
+/* C++ demangler stuff. */
+
+/* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
+ LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
+ If the name is not mangled, or the language for the name is unknown, or
+ demangling is off, the name is printed in its "raw" form. */
+
+void
+fprintf_symbol_filtered (stream, name, lang, arg_mode)
+ FILE *stream;
+ char *name;
+ enum language lang;
+ int arg_mode;
+{
+ char *demangled;
+
+ if (name != NULL)
+ {
+ /* If user wants to see raw output, no problem. */
+ if (!demangle)
+ {
+ fputs_filtered (name, stream);
+ }
+ else
+ {
+ switch (lang)
+ {
+ case language_cplus:
+ demangled = cplus_demangle (name, arg_mode);
+ break;
+ case language_chill:
+ demangled = chill_demangle (name);
+ break;
+ default:
+ demangled = NULL;
+ break;
+ }
+ fputs_filtered (demangled ? demangled : name, stream);
+ if (demangled != NULL)
+ {
+ free (demangled);
+ }
+ }
+ }
+}
+
+/* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
+ differences in whitespace. Returns 0 if they match, non-zero if they
+ don't (slightly different than strcmp()'s range of return values).
+
+ As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
+ This "feature" is useful when searching for matching C++ function names
+ (such as if the user types 'break FOO', where FOO is a mangled C++
+ function). */
+
+int
+strcmp_iw (string1, string2)
+ const char *string1;
+ const char *string2;
+{
+ while ((*string1 != '\0') && (*string2 != '\0'))
+ {
+ while (isspace (*string1))
+ {
+ string1++;
+ }
+ while (isspace (*string2))
+ {
+ string2++;
+ }
+ if (*string1 != *string2)
+ {
+ break;
+ }
+ if (*string1 != '\0')
+ {
+ string1++;
+ string2++;
+ }
}
+ return (*string1 != '\0' && *string1 != '(') || (*string2 != '\0');
+}
+
+\f
+void
+_initialize_utils ()
+{
+ struct cmd_list_element *c;
+
+ c = add_set_cmd ("width", class_support, var_uinteger,
+ (char *)&chars_per_line,
+ "Set number of characters gdb thinks are in a line.",
+ &setlist);
+ add_show_from_set (c, &showlist);
+ c->function.sfunc = set_width_command;
+
+ add_show_from_set
+ (add_set_cmd ("height", class_support,
+ var_uinteger, (char *)&lines_per_page,
+ "Set number of lines gdb thinks are in a page.", &setlist),
+ &showlist);
+
+ /* These defaults will be used if we are unable to get the correct
+ values from termcap. */
+#if defined(__GO32__)
+ lines_per_page = ScreenRows();
+ chars_per_line = ScreenCols();
+#else
+ lines_per_page = 24;
+ chars_per_line = 80;
+ /* Initialize the screen height and width from termcap. */
+ {
+ char *termtype = getenv ("TERM");
+
+ /* Positive means success, nonpositive means failure. */
+ int status;
+
+ /* 2048 is large enough for all known terminals, according to the
+ GNU termcap manual. */
+ char term_buffer[2048];
+
+ if (termtype)
+ {
+ status = tgetent (term_buffer, termtype);
+ if (status > 0)
+ {
+ int val;
+
+ val = tgetnum ("li");
+ if (val >= 0)
+ lines_per_page = val;
+ else
+ /* The number of lines per page is not mentioned
+ in the terminal description. This probably means
+ that paging is not useful (e.g. emacs shell window),
+ so disable paging. */
+ lines_per_page = UINT_MAX;
+
+ val = tgetnum ("co");
+ if (val >= 0)
+ chars_per_line = val;
+ }
+ }
+ }
+
+#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
+
+ /* If there is a better way to determine the window size, use it. */
+ SIGWINCH_HANDLER ();
+#endif
+#endif
+ /* If the output is not a terminal, don't paginate it. */
+ if (!ISATTY (stdout))
+ lines_per_page = UINT_MAX;
+
+ set_width_command ((char *)NULL, 0, c);
+
+ add_show_from_set
+ (add_set_cmd ("demangle", class_support, var_boolean,
+ (char *)&demangle,
+ "Set demangling of encoded C++ names when displaying symbols.",
+ &setprintlist),
+ &showprintlist);
+
+ add_show_from_set
+ (add_set_cmd ("sevenbit-strings", class_support, var_boolean,
+ (char *)&sevenbit_strings,
+ "Set printing of 8-bit characters in strings as \\nnn.",
+ &setprintlist),
+ &showprintlist);
+
+ add_show_from_set
+ (add_set_cmd ("asm-demangle", class_support, var_boolean,
+ (char *)&asm_demangle,
+ "Set demangling of C++ names in disassembly listings.",
+ &setprintlist),
+ &showprintlist);
}
+
+/* Machine specific function to handle SIGWINCH signal. */
+
+#ifdef SIGWINCH_HANDLER_BODY
+ SIGWINCH_HANDLER_BODY
+#endif
+
projects / binutils.git / blobdiff