1 /* General utility routines for GDB, the GNU debugger.
2 Copyright 1986, 1989, 1990, 1991, 1992, 1995 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 #if !defined(__GO32__) && !defined(__WIN32__) && !defined(MPW)
22 #include <sys/ioctl.h>
23 #include <sys/param.h>
26 #ifdef ANSI_PROTOTYPES
32 #include "gdb_string.h"
43 #include "expression.h"
49 /* readline defines this. */
52 /* Prototypes for local functions */
54 static void vfprintf_maybe_filtered
PARAMS ((FILE *, const char *, va_list, int));
56 static void fputs_maybe_filtered
PARAMS ((const char *, FILE *, int));
58 #if !defined (NO_MMALLOC) && !defined (NO_MMCHECK)
59 static void malloc_botch
PARAMS ((void));
63 fatal_dump_core
PARAMS((char *, ...));
66 prompt_for_continue
PARAMS ((void));
69 set_width_command
PARAMS ((char *, int, struct cmd_list_element
*));
71 /* If this definition isn't overridden by the header files, assume
72 that isatty and fileno exist on this system. */
74 #define ISATTY(FP) (isatty (fileno (FP)))
77 /* Chain of cleanup actions established with make_cleanup,
78 to be executed if an error happens. */
80 static struct cleanup
*cleanup_chain
;
82 /* Nonzero if we have job control. */
86 /* Nonzero means a quit has been requested. */
90 /* Nonzero means quit immediately if Control-C is typed now, rather
91 than waiting until QUIT is executed. Be careful in setting this;
92 code which executes with immediate_quit set has to be very careful
93 about being able to deal with being interrupted at any time. It is
94 almost always better to use QUIT; the only exception I can think of
95 is being able to quit out of a system call (using EINTR loses if
96 the SIGINT happens between the previous QUIT and the system call).
97 To immediately quit in the case in which a SIGINT happens between
98 the previous QUIT and setting immediate_quit (desirable anytime we
99 expect to block), call QUIT after setting immediate_quit. */
103 /* Nonzero means that encoded C++ names should be printed out in their
104 C++ form rather than raw. */
108 /* Nonzero means that encoded C++ names should be printed out in their
109 C++ form even in assembler language displays. If this is set, but
110 DEMANGLE is zero, names are printed raw, i.e. DEMANGLE controls. */
112 int asm_demangle
= 0;
114 /* Nonzero means that strings with character values >0x7F should be printed
115 as octal escapes. Zero means just print the value (e.g. it's an
116 international character, and the terminal or window can cope.) */
118 int sevenbit_strings
= 0;
120 /* String to be printed before error messages, if any. */
122 char *error_pre_print
;
124 /* String to be printed before quit messages, if any. */
126 char *quit_pre_print
;
128 /* String to be printed before warning messages, if any. */
130 char *warning_pre_print
= "\nwarning: ";
132 /* Add a new cleanup to the cleanup_chain,
133 and return the previous chain pointer
134 to be passed later to do_cleanups or discard_cleanups.
135 Args are FUNCTION to clean up with, and ARG to pass to it. */
138 make_cleanup (function
, arg
)
139 void (*function
) PARAMS ((PTR
));
142 register struct cleanup
*new
143 = (struct cleanup
*) xmalloc (sizeof (struct cleanup
));
144 register struct cleanup
*old_chain
= cleanup_chain
;
146 new->next
= cleanup_chain
;
147 new->function
= function
;
154 /* Discard cleanups and do the actions they describe
155 until we get back to the point OLD_CHAIN in the cleanup_chain. */
158 do_cleanups (old_chain
)
159 register struct cleanup
*old_chain
;
161 register struct cleanup
*ptr
;
162 while ((ptr
= cleanup_chain
) != old_chain
)
164 cleanup_chain
= ptr
->next
; /* Do this first incase recursion */
165 (*ptr
->function
) (ptr
->arg
);
170 /* Discard cleanups, not doing the actions they describe,
171 until we get back to the point OLD_CHAIN in the cleanup_chain. */
174 discard_cleanups (old_chain
)
175 register struct cleanup
*old_chain
;
177 register struct cleanup
*ptr
;
178 while ((ptr
= cleanup_chain
) != old_chain
)
180 cleanup_chain
= ptr
->next
;
185 /* Set the cleanup_chain to 0, and return the old cleanup chain. */
189 struct cleanup
*old_chain
= cleanup_chain
;
195 /* Restore the cleanup chain from a previously saved chain. */
197 restore_cleanups (chain
)
198 struct cleanup
*chain
;
200 cleanup_chain
= chain
;
203 /* This function is useful for cleanups.
207 old_chain = make_cleanup (free_current_contents, &foo);
209 to arrange to free the object thus allocated. */
212 free_current_contents (location
)
218 /* Provide a known function that does nothing, to use as a base for
219 for a possibly long chain of cleanups. This is useful where we
220 use the cleanup chain for handling normal cleanups as well as dealing
221 with cleanups that need to be done as a result of a call to error().
222 In such cases, we may not be certain where the first cleanup is, unless
223 we have a do-nothing one to always use as the base. */
233 /* Print a warning message. Way to use this is to call warning_begin,
234 output the warning message (use unfiltered output to gdb_stderr),
235 ending in a newline. There is not currently a warning_end that you
236 call afterwards, but such a thing might be added if it is useful
237 for a GUI to separate warning messages from other output.
239 FIXME: Why do warnings use unfiltered output and errors filtered?
240 Is this anything other than a historical accident? */
245 target_terminal_ours ();
246 wrap_here(""); /* Force out any buffered output */
247 gdb_flush (gdb_stdout
);
248 if (warning_pre_print
)
249 fprintf_unfiltered (gdb_stderr
, warning_pre_print
);
252 /* Print a warning message.
253 The first argument STRING is the warning message, used as a fprintf string,
254 and the remaining args are passed as arguments to it.
255 The primary difference between warnings and errors is that a warning
256 does not force the return to command level. */
260 #ifdef ANSI_PROTOTYPES
261 warning (char *string
, ...)
268 #ifdef ANSI_PROTOTYPES
269 va_start (args
, string
);
274 string
= va_arg (args
, char *);
277 vfprintf_unfiltered (gdb_stderr
, string
, args
);
278 fprintf_unfiltered (gdb_stderr
, "\n");
282 /* Start the printing of an error message. Way to use this is to call
283 this, output the error message (use filtered output to gdb_stderr
284 (FIXME: Some callers, like memory_error, use gdb_stdout)), ending
285 in a newline, and then call return_to_top_level (RETURN_ERROR).
286 error() provides a convenient way to do this for the special case
287 that the error message can be formatted with a single printf call,
288 but this is more general. */
292 target_terminal_ours ();
293 wrap_here (""); /* Force out any buffered output */
294 gdb_flush (gdb_stdout
);
296 annotate_error_begin ();
299 fprintf_filtered (gdb_stderr
, error_pre_print
);
302 /* Print an error message and return to command level.
303 The first argument STRING is the error message, used as a fprintf string,
304 and the remaining args are passed as arguments to it. */
306 #ifdef ANSI_PROTOTYPES
308 error (char *string
, ...)
316 #ifdef ANSI_PROTOTYPES
317 va_start (args
, string
);
326 #ifdef ANSI_PROTOTYPES
327 vfprintf_filtered (gdb_stderr
, string
, args
);
332 string1
= va_arg (args
, char *);
333 vfprintf_filtered (gdb_stderr
, string1
, args
);
336 fprintf_filtered (gdb_stderr
, "\n");
338 return_to_top_level (RETURN_ERROR
);
343 /* Print an error message and exit reporting failure.
344 This is for a error that we cannot continue from.
345 The arguments are printed a la printf.
347 This function cannot be declared volatile (NORETURN) in an
348 ANSI environment because exit() is not declared volatile. */
352 #ifdef ANSI_PROTOTYPES
353 fatal (char *string
, ...)
360 #ifdef ANSI_PROTOTYPES
361 va_start (args
, string
);
365 string
= va_arg (args
, char *);
367 fprintf_unfiltered (gdb_stderr
, "\ngdb: ");
368 vfprintf_unfiltered (gdb_stderr
, string
, args
);
369 fprintf_unfiltered (gdb_stderr
, "\n");
374 /* Print an error message and exit, dumping core.
375 The arguments are printed a la printf (). */
379 #ifdef ANSI_PROTOTYPES
380 fatal_dump_core (char *string
, ...)
382 fatal_dump_core (va_alist
)
387 #ifdef ANSI_PROTOTYPES
388 va_start (args
, string
);
393 string
= va_arg (args
, char *);
395 /* "internal error" is always correct, since GDB should never dump
396 core, no matter what the input. */
397 fprintf_unfiltered (gdb_stderr
, "\ngdb internal error: ");
398 vfprintf_unfiltered (gdb_stderr
, string
, args
);
399 fprintf_unfiltered (gdb_stderr
, "\n");
402 signal (SIGQUIT
, SIG_DFL
);
403 kill (getpid (), SIGQUIT
);
404 /* We should never get here, but just in case... */
408 /* The strerror() function can return NULL for errno values that are
409 out of range. Provide a "safe" version that always returns a
413 safe_strerror (errnum
)
419 if ((msg
= strerror (errnum
)) == NULL
)
421 sprintf (buf
, "(undocumented errno %d)", errnum
);
427 /* The strsignal() function can return NULL for signal values that are
428 out of range. Provide a "safe" version that always returns a
432 safe_strsignal (signo
)
438 if ((msg
= strsignal (signo
)) == NULL
)
440 sprintf (buf
, "(undocumented signal %d)", signo
);
447 /* Print the system error message for errno, and also mention STRING
448 as the file name for which the error was encountered.
449 Then return to command level. */
452 perror_with_name (string
)
458 err
= safe_strerror (errno
);
459 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
460 strcpy (combined
, string
);
461 strcat (combined
, ": ");
462 strcat (combined
, err
);
464 /* I understand setting these is a matter of taste. Still, some people
465 may clear errno but not know about bfd_error. Doing this here is not
467 bfd_set_error (bfd_error_no_error
);
470 error ("%s.", combined
);
473 /* Print the system error message for ERRCODE, and also mention STRING
474 as the file name for which the error was encountered. */
477 print_sys_errmsg (string
, errcode
)
484 err
= safe_strerror (errcode
);
485 combined
= (char *) alloca (strlen (err
) + strlen (string
) + 3);
486 strcpy (combined
, string
);
487 strcat (combined
, ": ");
488 strcat (combined
, err
);
490 /* We want anything which was printed on stdout to come out first, before
492 gdb_flush (gdb_stdout
);
493 fprintf_unfiltered (gdb_stderr
, "%s.\n", combined
);
496 /* Control C eventually causes this to be called, at a convenient time. */
501 serial_t gdb_stdout_serial
= serial_fdopen (1);
503 target_terminal_ours ();
505 /* We want all output to appear now, before we print "Quit". We
506 have 3 levels of buffering we have to flush (it's possible that
507 some of these should be changed to flush the lower-level ones
510 /* 1. The _filtered buffer. */
511 wrap_here ((char *)0);
513 /* 2. The stdio buffer. */
514 gdb_flush (gdb_stdout
);
515 gdb_flush (gdb_stderr
);
517 /* 3. The system-level buffer. */
518 SERIAL_FLUSH_OUTPUT (gdb_stdout_serial
);
519 SERIAL_UN_FDOPEN (gdb_stdout_serial
);
521 annotate_error_begin ();
523 /* Don't use *_filtered; we don't want to prompt the user to continue. */
525 fprintf_unfiltered (gdb_stderr
, quit_pre_print
);
528 /* If there is no terminal switching for this target, then we can't
529 possibly get screwed by the lack of job control. */
530 || current_target
.to_terminal_ours
== NULL
)
531 fprintf_unfiltered (gdb_stderr
, "Quit\n");
533 fprintf_unfiltered (gdb_stderr
,
534 "Quit (expect signal SIGINT when the program is resumed)\n");
535 return_to_top_level (RETURN_QUIT
);
539 #if defined(__GO32__)||defined(WINGDB)
541 /* In the absence of signals, poll keyboard for a quit.
542 Called from #define QUIT pollquit() in xm-go32.h. */
560 /* We just ignore it */
561 fprintf_unfiltered (gdb_stderr
, "CTRL-A to quit, CTRL-B to quit harder\n");
568 #if defined(__GO32__)||defined(WINGDB)
583 fprintf_unfiltered (gdb_stderr
, "CTRL-A to quit, CTRL-B to quit harder\n");
590 /* Done by signals */
593 /* Control C comes here */
600 /* Restore the signal handler. Harmless with BSD-style signals, needed
601 for System V-style signals. So just always do it, rather than worrying
602 about USG defines and stuff like that. */
603 signal (signo
, request_quit
);
605 /* start-sanitize-gm */
608 #endif /* GENERAL_MAGIC */
609 /* end-sanitize-gm */
620 /* Memory management stuff (malloc friends). */
622 #if defined (NO_MMALLOC)
624 /* Make a substitute size_t for non-ANSI compilers. */
631 #define size_t unsigned int
641 return malloc (size
);
645 mrealloc (md
, ptr
, size
)
650 if (ptr
== 0) /* Guard against old realloc's */
651 return malloc (size
);
653 return realloc (ptr
, size
);
664 #endif /* NO_MMALLOC */
666 #if defined (NO_MMALLOC) || defined (NO_MMCHECK)
674 #else /* Have mmalloc and want corruption checking */
679 fatal_dump_core ("Memory corruption");
682 /* Attempt to install hooks in mmalloc/mrealloc/mfree for the heap specified
683 by MD, to detect memory corruption. Note that MD may be NULL to specify
684 the default heap that grows via sbrk.
686 Note that for freshly created regions, we must call mmcheckf prior to any
687 mallocs in the region. Otherwise, any region which was allocated prior to
688 installing the checking hooks, which is later reallocated or freed, will
689 fail the checks! The mmcheck function only allows initial hooks to be
690 installed before the first mmalloc. However, anytime after we have called
691 mmcheck the first time to install the checking hooks, we can call it again
692 to update the function pointer to the memory corruption handler.
694 Returns zero on failure, non-zero on success. */
696 #ifndef MMCHECK_FORCE
697 #define MMCHECK_FORCE 0
704 if (!mmcheckf (md
, malloc_botch
, MMCHECK_FORCE
))
706 /* Don't use warning(), which relies on current_target being set
707 to something other than dummy_target, until after
708 initialize_all_files(). */
711 (gdb_stderr
, "warning: failed to install memory consistency checks; ");
713 (gdb_stderr
, "configuration should define NO_MMCHECK or MMCHECK_FORCE\n");
719 #endif /* Have mmalloc and want corruption checking */
721 /* Called when a memory allocation fails, with the number of bytes of
722 memory requested in SIZE. */
730 fatal ("virtual memory exhausted: can't allocate %ld bytes.", size
);
734 fatal ("virtual memory exhausted.");
738 /* Like mmalloc but get error if no storage available, and protect against
739 the caller wanting to allocate zero bytes. Whether to return NULL for
740 a zero byte request, or translate the request into a request for one
741 byte of zero'd storage, is a religious issue. */
754 else if ((val
= mmalloc (md
, size
)) == NULL
)
761 /* Like mrealloc but get error if no storage available. */
764 xmrealloc (md
, ptr
, size
)
773 val
= mrealloc (md
, ptr
, size
);
777 val
= mmalloc (md
, size
);
786 /* Like malloc but get error if no storage available, and protect against
787 the caller wanting to allocate zero bytes. */
793 return (xmmalloc ((PTR
) NULL
, size
));
796 /* Like mrealloc but get error if no storage available. */
803 return (xmrealloc ((PTR
) NULL
, ptr
, size
));
807 /* My replacement for the read system call.
808 Used like `read' but keeps going if `read' returns too soon. */
811 myread (desc
, addr
, len
)
821 val
= read (desc
, addr
, len
);
832 /* Make a copy of the string at PTR with SIZE characters
833 (and add a null character at the end in the copy).
834 Uses malloc to get the space. Returns the address of the copy. */
837 savestring (ptr
, size
)
841 register char *p
= (char *) xmalloc (size
+ 1);
842 memcpy (p
, ptr
, size
);
848 msavestring (md
, ptr
, size
)
853 register char *p
= (char *) xmmalloc (md
, size
+ 1);
854 memcpy (p
, ptr
, size
);
859 /* The "const" is so it compiles under DGUX (which prototypes strsave
860 in <string.h>. FIXME: This should be named "xstrsave", shouldn't it?
861 Doesn't real strsave return NULL if out of memory? */
866 return savestring (ptr
, strlen (ptr
));
874 return (msavestring (md
, ptr
, strlen (ptr
)));
878 print_spaces (n
, file
)
886 /* Print a host address. */
889 gdb_print_address (addr
, stream
)
894 /* We could use the %p conversion specifier to fprintf if we had any
895 way of knowing whether this host supports it. But the following
896 should work on the Alpha and on 32 bit machines. */
898 fprintf_filtered (stream
, "0x%lx", (unsigned long)addr
);
901 /* Ask user a y-or-n question and return 1 iff answer is yes.
902 Takes three args which are given to printf to print the question.
903 The first, a control string, should end in "? ".
904 It should not say how to answer, because we do that. */
908 #ifdef ANSI_PROTOTYPES
909 query (char *ctlstr
, ...)
920 #ifdef ANSI_PROTOTYPES
921 va_start (args
, ctlstr
);
925 ctlstr
= va_arg (args
, char *);
930 return query_hook (ctlstr
, args
);
933 /* Automatically answer "yes" if input is not from a terminal. */
934 if (!input_from_terminal_p ())
937 /* FIXME Automatically answer "yes" if called from MacGDB. */
944 wrap_here (""); /* Flush any buffered output */
945 gdb_flush (gdb_stdout
);
947 if (annotation_level
> 1)
948 printf_filtered ("\n\032\032pre-query\n");
950 vfprintf_filtered (gdb_stdout
, ctlstr
, args
);
951 printf_filtered ("(y or n) ");
953 if (annotation_level
> 1)
954 printf_filtered ("\n\032\032query\n");
957 /* If not in MacGDB, move to a new line so the entered line doesn't
958 have a prompt on the front of it. */
960 fputs_unfiltered ("\n", gdb_stdout
);
963 gdb_flush (gdb_stdout
);
964 answer
= fgetc (stdin
);
965 clearerr (stdin
); /* in case of C-d */
966 if (answer
== EOF
) /* C-d */
971 if (answer
!= '\n') /* Eat rest of input line, to EOF or newline */
974 ans2
= fgetc (stdin
);
977 while (ans2
!= EOF
&& ans2
!= '\n');
990 printf_filtered ("Please answer y or n.\n");
993 if (annotation_level
> 1)
994 printf_filtered ("\n\032\032post-query\n");
999 /* Parse a C escape sequence. STRING_PTR points to a variable
1000 containing a pointer to the string to parse. That pointer
1001 should point to the character after the \. That pointer
1002 is updated past the characters we use. The value of the
1003 escape sequence is returned.
1005 A negative value means the sequence \ newline was seen,
1006 which is supposed to be equivalent to nothing at all.
1008 If \ is followed by a null character, we return a negative
1009 value and leave the string pointer pointing at the null character.
1011 If \ is followed by 000, we return 0 and leave the string pointer
1012 after the zeros. A value of 0 does not mean end of string. */
1015 parse_escape (string_ptr
)
1018 register int c
= *(*string_ptr
)++;
1022 return 007; /* Bell (alert) char */
1025 case 'e': /* Escape character */
1043 c
= *(*string_ptr
)++;
1045 c
= parse_escape (string_ptr
);
1048 return (c
& 0200) | (c
& 037);
1059 register int i
= c
- '0';
1060 register int count
= 0;
1063 if ((c
= *(*string_ptr
)++) >= '0' && c
<= '7')
1081 /* Print the character C on STREAM as part of the contents of a literal
1082 string whose delimiter is QUOTER. Note that this routine should only
1083 be call for printing things which are independent of the language
1084 of the program being debugged. */
1087 gdb_printchar (c
, stream
, quoter
)
1093 c
&= 0xFF; /* Avoid sign bit follies */
1095 if ( c
< 0x20 || /* Low control chars */
1096 (c
>= 0x7F && c
< 0xA0) || /* DEL, High controls */
1097 (sevenbit_strings
&& c
>= 0x80)) { /* high order bit set */
1101 fputs_filtered ("\\n", stream
);
1104 fputs_filtered ("\\b", stream
);
1107 fputs_filtered ("\\t", stream
);
1110 fputs_filtered ("\\f", stream
);
1113 fputs_filtered ("\\r", stream
);
1116 fputs_filtered ("\\e", stream
);
1119 fputs_filtered ("\\a", stream
);
1122 fprintf_filtered (stream
, "\\%.3o", (unsigned int) c
);
1126 if (c
== '\\' || c
== quoter
)
1127 fputs_filtered ("\\", stream
);
1128 fprintf_filtered (stream
, "%c", c
);
1132 /* Number of lines per page or UINT_MAX if paging is disabled. */
1133 static unsigned int lines_per_page
;
1134 /* Number of chars per line or UNIT_MAX is line folding is disabled. */
1135 static unsigned int chars_per_line
;
1136 /* Current count of lines printed on this page, chars on this line. */
1137 static unsigned int lines_printed
, chars_printed
;
1139 /* Buffer and start column of buffered text, for doing smarter word-
1140 wrapping. When someone calls wrap_here(), we start buffering output
1141 that comes through fputs_filtered(). If we see a newline, we just
1142 spit it out and forget about the wrap_here(). If we see another
1143 wrap_here(), we spit it out and remember the newer one. If we see
1144 the end of the line, we spit out a newline, the indent, and then
1145 the buffered output. */
1147 /* Malloc'd buffer with chars_per_line+2 bytes. Contains characters which
1148 are waiting to be output (they have already been counted in chars_printed).
1149 When wrap_buffer[0] is null, the buffer is empty. */
1150 static char *wrap_buffer
;
1152 /* Pointer in wrap_buffer to the next character to fill. */
1153 static char *wrap_pointer
;
1155 /* String to indent by if the wrap occurs. Must not be NULL if wrap_column
1157 static char *wrap_indent
;
1159 /* Column number on the screen where wrap_buffer begins, or 0 if wrapping
1160 is not in effect. */
1161 static int wrap_column
;
1165 set_width_command (args
, from_tty
, c
)
1168 struct cmd_list_element
*c
;
1172 wrap_buffer
= (char *) xmalloc (chars_per_line
+ 2);
1173 wrap_buffer
[0] = '\0';
1176 wrap_buffer
= (char *) xrealloc (wrap_buffer
, chars_per_line
+ 2);
1177 wrap_pointer
= wrap_buffer
; /* Start it at the beginning */
1180 /* Wait, so the user can read what's on the screen. Prompt the user
1181 to continue by pressing RETURN. */
1184 prompt_for_continue ()
1187 char cont_prompt
[120];
1189 if (annotation_level
> 1)
1190 printf_unfiltered ("\n\032\032pre-prompt-for-continue\n");
1192 strcpy (cont_prompt
,
1193 "---Type <return> to continue, or q <return> to quit---");
1194 if (annotation_level
> 1)
1195 strcat (cont_prompt
, "\n\032\032prompt-for-continue\n");
1197 /* We must do this *before* we call gdb_readline, else it will eventually
1198 call us -- thinking that we're trying to print beyond the end of the
1200 reinitialize_more_filter ();
1203 /* On a real operating system, the user can quit with SIGINT.
1206 'q' is provided on all systems so users don't have to change habits
1207 from system to system, and because telling them what to do in
1208 the prompt is more user-friendly than expecting them to think of
1210 /* Call readline, not gdb_readline, because GO32 readline handles control-C
1211 whereas control-C to gdb_readline will cause the user to get dumped
1213 ignore
= readline (cont_prompt
);
1215 if (annotation_level
> 1)
1216 printf_unfiltered ("\n\032\032post-prompt-for-continue\n");
1221 while (*p
== ' ' || *p
== '\t')
1224 request_quit (SIGINT
);
1229 /* Now we have to do this again, so that GDB will know that it doesn't
1230 need to save the ---Type <return>--- line at the top of the screen. */
1231 reinitialize_more_filter ();
1233 dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
1236 /* Reinitialize filter; ie. tell it to reset to original values. */
1239 reinitialize_more_filter ()
1245 /* Indicate that if the next sequence of characters overflows the line,
1246 a newline should be inserted here rather than when it hits the end.
1247 If INDENT is non-null, it is a string to be printed to indent the
1248 wrapped part on the next line. INDENT must remain accessible until
1249 the next call to wrap_here() or until a newline is printed through
1252 If the line is already overfull, we immediately print a newline and
1253 the indentation, and disable further wrapping.
1255 If we don't know the width of lines, but we know the page height,
1256 we must not wrap words, but should still keep track of newlines
1257 that were explicitly printed.
1259 INDENT should not contain tabs, as that will mess up the char count
1260 on the next line. FIXME.
1262 This routine is guaranteed to force out any output which has been
1263 squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
1264 used to force out output from the wrap_buffer. */
1270 /* This should have been allocated, but be paranoid anyway. */
1276 *wrap_pointer
= '\0';
1277 fputs_unfiltered (wrap_buffer
, gdb_stdout
);
1279 wrap_pointer
= wrap_buffer
;
1280 wrap_buffer
[0] = '\0';
1281 if (chars_per_line
== UINT_MAX
) /* No line overflow checking */
1285 else if (chars_printed
>= chars_per_line
)
1287 puts_filtered ("\n");
1289 puts_filtered (indent
);
1294 wrap_column
= chars_printed
;
1298 wrap_indent
= indent
;
1302 /* Ensure that whatever gets printed next, using the filtered output
1303 commands, starts at the beginning of the line. I.E. if there is
1304 any pending output for the current line, flush it and start a new
1305 line. Otherwise do nothing. */
1310 if (chars_printed
> 0)
1312 puts_filtered ("\n");
1318 gdb_fopen (name
, mode
)
1322 return fopen (name
, mode
);
1331 flush_hook (stream
);
1338 /* Like fputs but if FILTER is true, pause after every screenful.
1340 Regardless of FILTER can wrap at points other than the final
1341 character of a line.
1343 Unlike fputs, fputs_maybe_filtered does not return a value.
1344 It is OK for LINEBUFFER to be NULL, in which case just don't print
1347 Note that a longjmp to top level may occur in this routine (only if
1348 FILTER is true) (since prompt_for_continue may do so) so this
1349 routine should not be called when cleanups are not in place. */
1352 fputs_maybe_filtered (linebuffer
, stream
, filter
)
1353 const char *linebuffer
;
1357 const char *lineptr
;
1359 if (linebuffer
== 0)
1362 /* Don't do any filtering if it is disabled. */
1363 if (stream
!= gdb_stdout
1364 || (lines_per_page
== UINT_MAX
&& chars_per_line
== UINT_MAX
))
1366 fputs_unfiltered (linebuffer
, stream
);
1370 /* Go through and output each character. Show line extension
1371 when this is necessary; prompt user for new page when this is
1374 lineptr
= linebuffer
;
1377 /* Possible new page. */
1379 (lines_printed
>= lines_per_page
- 1))
1380 prompt_for_continue ();
1382 while (*lineptr
&& *lineptr
!= '\n')
1384 /* Print a single line. */
1385 if (*lineptr
== '\t')
1388 *wrap_pointer
++ = '\t';
1390 fputc_unfiltered ('\t', stream
);
1391 /* Shifting right by 3 produces the number of tab stops
1392 we have already passed, and then adding one and
1393 shifting left 3 advances to the next tab stop. */
1394 chars_printed
= ((chars_printed
>> 3) + 1) << 3;
1400 *wrap_pointer
++ = *lineptr
;
1402 fputc_unfiltered (*lineptr
, stream
);
1407 if (chars_printed
>= chars_per_line
)
1409 unsigned int save_chars
= chars_printed
;
1413 /* If we aren't actually wrapping, don't output newline --
1414 if chars_per_line is right, we probably just overflowed
1415 anyway; if it's wrong, let us keep going. */
1417 fputc_unfiltered ('\n', stream
);
1419 /* Possible new page. */
1420 if (lines_printed
>= lines_per_page
- 1)
1421 prompt_for_continue ();
1423 /* Now output indentation and wrapped string */
1426 fputs_unfiltered (wrap_indent
, stream
);
1427 *wrap_pointer
= '\0'; /* Null-terminate saved stuff */
1428 fputs_unfiltered (wrap_buffer
, stream
); /* and eject it */
1429 /* FIXME, this strlen is what prevents wrap_indent from
1430 containing tabs. However, if we recurse to print it
1431 and count its chars, we risk trouble if wrap_indent is
1432 longer than (the user settable) chars_per_line.
1433 Note also that this can set chars_printed > chars_per_line
1434 if we are printing a long string. */
1435 chars_printed
= strlen (wrap_indent
)
1436 + (save_chars
- wrap_column
);
1437 wrap_pointer
= wrap_buffer
; /* Reset buffer */
1438 wrap_buffer
[0] = '\0';
1439 wrap_column
= 0; /* And disable fancy wrap */
1444 if (*lineptr
== '\n')
1447 wrap_here ((char *)0); /* Spit out chars, cancel further wraps */
1449 fputc_unfiltered ('\n', stream
);
1456 fputs_filtered (linebuffer
, stream
)
1457 const char *linebuffer
;
1460 fputs_maybe_filtered (linebuffer
, stream
, 1);
1464 putchar_unfiltered (c
)
1471 fputs_unfiltered (buf
, gdb_stdout
);
1476 fputc_unfiltered (c
, stream
)
1484 fputs_unfiltered (buf
, stream
);
1489 /* Print a variable number of ARGS using format FORMAT. If this
1490 information is going to put the amount written (since the last call
1491 to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
1492 call prompt_for_continue to get the users permision to continue.
1494 Unlike fprintf, this function does not return a value.
1496 We implement three variants, vfprintf (takes a vararg list and stream),
1497 fprintf (takes a stream to write on), and printf (the usual).
1499 Note also that a longjmp to top level may occur in this routine
1500 (since prompt_for_continue may do so) so this routine should not be
1501 called when cleanups are not in place. */
1504 vfprintf_maybe_filtered (stream
, format
, args
, filter
)
1511 struct cleanup
*old_cleanups
;
1513 vasprintf (&linebuffer
, format
, args
);
1514 if (linebuffer
== NULL
)
1516 fputs_unfiltered ("\ngdb: virtual memory exhausted.\n", gdb_stderr
);
1519 old_cleanups
= make_cleanup (free
, linebuffer
);
1520 fputs_maybe_filtered (linebuffer
, stream
, filter
);
1521 do_cleanups (old_cleanups
);
1526 vfprintf_filtered (stream
, format
, args
)
1531 vfprintf_maybe_filtered (stream
, format
, args
, 1);
1535 vfprintf_unfiltered (stream
, format
, args
)
1541 struct cleanup
*old_cleanups
;
1543 vasprintf (&linebuffer
, format
, args
);
1544 if (linebuffer
== NULL
)
1546 fputs_unfiltered ("\ngdb: virtual memory exhausted.\n", gdb_stderr
);
1549 old_cleanups
= make_cleanup (free
, linebuffer
);
1550 fputs_unfiltered (linebuffer
, stream
);
1551 do_cleanups (old_cleanups
);
1555 vprintf_filtered (format
, args
)
1559 vfprintf_maybe_filtered (gdb_stdout
, format
, args
, 1);
1563 vprintf_unfiltered (format
, args
)
1567 vfprintf_unfiltered (gdb_stdout
, format
, args
);
1572 #ifdef ANSI_PROTOTYPES
1573 fprintf_filtered (FILE *stream
, const char *format
, ...)
1575 fprintf_filtered (va_alist
)
1580 #ifdef ANSI_PROTOTYPES
1581 va_start (args
, format
);
1587 stream
= va_arg (args
, FILE *);
1588 format
= va_arg (args
, char *);
1590 vfprintf_filtered (stream
, format
, args
);
1596 #ifdef ANSI_PROTOTYPES
1597 fprintf_unfiltered (FILE *stream
, const char *format
, ...)
1599 fprintf_unfiltered (va_alist
)
1604 #ifdef ANSI_PROTOTYPES
1605 va_start (args
, format
);
1611 stream
= va_arg (args
, FILE *);
1612 format
= va_arg (args
, char *);
1614 vfprintf_unfiltered (stream
, format
, args
);
1618 /* Like fprintf_filtered, but prints its result indented.
1619 Called as fprintfi_filtered (spaces, stream, format, ...); */
1623 #ifdef ANSI_PROTOTYPES
1624 fprintfi_filtered (int spaces
, FILE *stream
, const char *format
, ...)
1626 fprintfi_filtered (va_alist
)
1631 #ifdef ANSI_PROTOTYPES
1632 va_start (args
, format
);
1639 spaces
= va_arg (args
, int);
1640 stream
= va_arg (args
, FILE *);
1641 format
= va_arg (args
, char *);
1643 print_spaces_filtered (spaces
, stream
);
1645 vfprintf_filtered (stream
, format
, args
);
1652 #ifdef ANSI_PROTOTYPES
1653 printf_filtered (const char *format
, ...)
1655 printf_filtered (va_alist
)
1660 #ifdef ANSI_PROTOTYPES
1661 va_start (args
, format
);
1666 format
= va_arg (args
, char *);
1668 vfprintf_filtered (gdb_stdout
, format
, args
);
1675 #ifdef ANSI_PROTOTYPES
1676 printf_unfiltered (const char *format
, ...)
1678 printf_unfiltered (va_alist
)
1683 #ifdef ANSI_PROTOTYPES
1684 va_start (args
, format
);
1689 format
= va_arg (args
, char *);
1691 vfprintf_unfiltered (gdb_stdout
, format
, args
);
1695 /* Like printf_filtered, but prints it's result indented.
1696 Called as printfi_filtered (spaces, format, ...); */
1700 #ifdef ANSI_PROTOTYPES
1701 printfi_filtered (int spaces
, const char *format
, ...)
1703 printfi_filtered (va_alist
)
1708 #ifdef ANSI_PROTOTYPES
1709 va_start (args
, format
);
1715 spaces
= va_arg (args
, int);
1716 format
= va_arg (args
, char *);
1718 print_spaces_filtered (spaces
, gdb_stdout
);
1719 vfprintf_filtered (gdb_stdout
, format
, args
);
1723 /* Easy -- but watch out!
1725 This routine is *not* a replacement for puts()! puts() appends a newline.
1726 This one doesn't, and had better not! */
1729 puts_filtered (string
)
1732 fputs_filtered (string
, gdb_stdout
);
1736 puts_unfiltered (string
)
1739 fputs_unfiltered (string
, gdb_stdout
);
1742 /* Return a pointer to N spaces and a null. The pointer is good
1743 until the next call to here. */
1749 static char *spaces
;
1750 static int max_spaces
;
1756 spaces
= (char *) xmalloc (n
+1);
1757 for (t
= spaces
+n
; t
!= spaces
;)
1763 return spaces
+ max_spaces
- n
;
1766 /* Print N spaces. */
1768 print_spaces_filtered (n
, stream
)
1772 fputs_filtered (n_spaces (n
), stream
);
1775 /* C++ demangler stuff. */
1777 /* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
1778 LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
1779 If the name is not mangled, or the language for the name is unknown, or
1780 demangling is off, the name is printed in its "raw" form. */
1783 fprintf_symbol_filtered (stream
, name
, lang
, arg_mode
)
1793 /* If user wants to see raw output, no problem. */
1796 fputs_filtered (name
, stream
);
1802 case language_cplus
:
1803 demangled
= cplus_demangle (name
, arg_mode
);
1805 case language_chill
:
1806 demangled
= chill_demangle (name
);
1812 fputs_filtered (demangled
? demangled
: name
, stream
);
1813 if (demangled
!= NULL
)
1821 /* Do a strcmp() type operation on STRING1 and STRING2, ignoring any
1822 differences in whitespace. Returns 0 if they match, non-zero if they
1823 don't (slightly different than strcmp()'s range of return values).
1825 As an extra hack, string1=="FOO(ARGS)" matches string2=="FOO".
1826 This "feature" is useful when searching for matching C++ function names
1827 (such as if the user types 'break FOO', where FOO is a mangled C++
1831 strcmp_iw (string1
, string2
)
1832 const char *string1
;
1833 const char *string2
;
1835 while ((*string1
!= '\0') && (*string2
!= '\0'))
1837 while (isspace (*string1
))
1841 while (isspace (*string2
))
1845 if (*string1
!= *string2
)
1849 if (*string1
!= '\0')
1855 return (*string1
!= '\0' && *string1
!= '(') || (*string2
!= '\0');
1862 struct cmd_list_element
*c
;
1864 c
= add_set_cmd ("width", class_support
, var_uinteger
,
1865 (char *)&chars_per_line
,
1866 "Set number of characters gdb thinks are in a line.",
1868 add_show_from_set (c
, &showlist
);
1869 c
->function
.sfunc
= set_width_command
;
1872 (add_set_cmd ("height", class_support
,
1873 var_uinteger
, (char *)&lines_per_page
,
1874 "Set number of lines gdb thinks are in a page.", &setlist
),
1877 /* These defaults will be used if we are unable to get the correct
1878 values from termcap. */
1879 #if defined(__GO32__) || defined(__WIN32__)
1880 lines_per_page
= ScreenRows();
1881 chars_per_line
= ScreenCols();
1883 lines_per_page
= 24;
1884 chars_per_line
= 80;
1887 /* No termcap under MPW, although might be cool to do something
1888 by looking at worksheet or console window sizes. */
1889 /* Initialize the screen height and width from termcap. */
1891 char *termtype
= getenv ("TERM");
1893 /* Positive means success, nonpositive means failure. */
1896 /* 2048 is large enough for all known terminals, according to the
1897 GNU termcap manual. */
1898 char term_buffer
[2048];
1902 status
= tgetent (term_buffer
, termtype
);
1907 val
= tgetnum ("li");
1909 lines_per_page
= val
;
1911 /* The number of lines per page is not mentioned
1912 in the terminal description. This probably means
1913 that paging is not useful (e.g. emacs shell window),
1914 so disable paging. */
1915 lines_per_page
= UINT_MAX
;
1917 val
= tgetnum ("co");
1919 chars_per_line
= val
;
1925 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1927 /* If there is a better way to determine the window size, use it. */
1928 SIGWINCH_HANDLER ();
1931 /* If the output is not a terminal, don't paginate it. */
1932 if (!ISATTY (gdb_stdout
))
1933 lines_per_page
= UINT_MAX
;
1935 set_width_command ((char *)NULL
, 0, c
);
1938 (add_set_cmd ("demangle", class_support
, var_boolean
,
1940 "Set demangling of encoded C++ names when displaying symbols.",
1945 (add_set_cmd ("sevenbit-strings", class_support
, var_boolean
,
1946 (char *)&sevenbit_strings
,
1947 "Set printing of 8-bit characters in strings as \\nnn.",
1952 (add_set_cmd ("asm-demangle", class_support
, var_boolean
,
1953 (char *)&asm_demangle
,
1954 "Set demangling of C++ names in disassembly listings.",
1959 /* Machine specific function to handle SIGWINCH signal. */
1961 #ifdef SIGWINCH_HANDLER_BODY
1962 SIGWINCH_HANDLER_BODY
1965 /* Support for converting target fp numbers into host DOUBLEST format. */
1967 /* XXX - This code should really be in libiberty/floatformat.c, however
1968 configuration issues with libiberty made this very difficult to do in the
1971 #include "floatformat.h"
1972 #include <math.h> /* ldexp */
1974 /* The odds that CHAR_BIT will be anything but 8 are low enough that I'm not
1975 going to bother with trying to muck around with whether it is defined in
1976 a system header, what we do if not, etc. */
1977 #define FLOATFORMAT_CHAR_BIT 8
1979 static unsigned long get_field
PARAMS ((unsigned char *,
1980 enum floatformat_byteorders
,
1985 /* Extract a field which starts at START and is LEN bytes long. DATA and
1986 TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER. */
1987 static unsigned long
1988 get_field (data
, order
, total_len
, start
, len
)
1989 unsigned char *data
;
1990 enum floatformat_byteorders order
;
1991 unsigned int total_len
;
1995 unsigned long result
;
1996 unsigned int cur_byte
;
1999 /* Start at the least significant part of the field. */
2000 cur_byte
= (start
+ len
) / FLOATFORMAT_CHAR_BIT
;
2001 if (order
== floatformat_little
)
2002 cur_byte
= (total_len
/ FLOATFORMAT_CHAR_BIT
) - cur_byte
- 1;
2004 ((start
+ len
) % FLOATFORMAT_CHAR_BIT
) - FLOATFORMAT_CHAR_BIT
;
2005 result
= *(data
+ cur_byte
) >> (-cur_bitshift
);
2006 cur_bitshift
+= FLOATFORMAT_CHAR_BIT
;
2007 if (order
== floatformat_little
)
2012 /* Move towards the most significant part of the field. */
2013 while (cur_bitshift
< len
)
2015 if (len
- cur_bitshift
< FLOATFORMAT_CHAR_BIT
)
2016 /* This is the last byte; zero out the bits which are not part of
2019 (*(data
+ cur_byte
) & ((1 << (len
- cur_bitshift
)) - 1))
2022 result
|= *(data
+ cur_byte
) << cur_bitshift
;
2023 cur_bitshift
+= FLOATFORMAT_CHAR_BIT
;
2024 if (order
== floatformat_little
)
2032 /* Convert from FMT to a DOUBLEST.
2033 FROM is the address of the extended float.
2034 Store the DOUBLEST in *TO. */
2037 floatformat_to_doublest (fmt
, from
, to
)
2038 const struct floatformat
*fmt
;
2042 unsigned char *ufrom
= (unsigned char *)from
;
2046 unsigned int mant_bits
, mant_off
;
2048 int special_exponent
; /* It's a NaN, denorm or zero */
2050 exponent
= get_field (ufrom
, fmt
->byteorder
, fmt
->totalsize
,
2051 fmt
->exp_start
, fmt
->exp_len
);
2052 /* Note that if exponent indicates a NaN, we can't really do anything useful
2053 (not knowing if the host has NaN's, or how to build one). So it will
2054 end up as an infinity or something close; that is OK. */
2056 mant_bits_left
= fmt
->man_len
;
2057 mant_off
= fmt
->man_start
;
2060 special_exponent
= exponent
== 0 || exponent
== fmt
->exp_nan
;
2062 /* Don't bias zero's, denorms or NaNs. */
2063 if (!special_exponent
)
2064 exponent
-= fmt
->exp_bias
;
2066 /* Build the result algebraically. Might go infinite, underflow, etc;
2069 /* If this format uses a hidden bit, explicitly add it in now. Otherwise,
2070 increment the exponent by one to account for the integer bit. */
2072 if (!special_exponent
)
2073 if (fmt
->intbit
== floatformat_intbit_no
)
2074 dto
= ldexp (1.0, exponent
);
2078 while (mant_bits_left
> 0)
2080 mant_bits
= min (mant_bits_left
, 32);
2082 mant
= get_field (ufrom
, fmt
->byteorder
, fmt
->totalsize
,
2083 mant_off
, mant_bits
);
2085 dto
+= ldexp ((double)mant
, exponent
- mant_bits
);
2086 exponent
-= mant_bits
;
2087 mant_off
+= mant_bits
;
2088 mant_bits_left
-= mant_bits
;
2091 /* Negate it if negative. */
2092 if (get_field (ufrom
, fmt
->byteorder
, fmt
->totalsize
, fmt
->sign_start
, 1))
2097 static void put_field
PARAMS ((unsigned char *, enum floatformat_byteorders
,
2103 /* Set a field which starts at START and is LEN bytes long. DATA and
2104 TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER. */
2106 put_field (data
, order
, total_len
, start
, len
, stuff_to_put
)
2107 unsigned char *data
;
2108 enum floatformat_byteorders order
;
2109 unsigned int total_len
;
2112 unsigned long stuff_to_put
;
2114 unsigned int cur_byte
;
2117 /* Start at the least significant part of the field. */
2118 cur_byte
= (start
+ len
) / FLOATFORMAT_CHAR_BIT
;
2119 if (order
== floatformat_little
)
2120 cur_byte
= (total_len
/ FLOATFORMAT_CHAR_BIT
) - cur_byte
- 1;
2122 ((start
+ len
) % FLOATFORMAT_CHAR_BIT
) - FLOATFORMAT_CHAR_BIT
;
2123 *(data
+ cur_byte
) &=
2124 ~(((1 << ((start
+ len
) % FLOATFORMAT_CHAR_BIT
)) - 1) << (-cur_bitshift
));
2125 *(data
+ cur_byte
) |=
2126 (stuff_to_put
& ((1 << FLOATFORMAT_CHAR_BIT
) - 1)) << (-cur_bitshift
);
2127 cur_bitshift
+= FLOATFORMAT_CHAR_BIT
;
2128 if (order
== floatformat_little
)
2133 /* Move towards the most significant part of the field. */
2134 while (cur_bitshift
< len
)
2136 if (len
- cur_bitshift
< FLOATFORMAT_CHAR_BIT
)
2138 /* This is the last byte. */
2139 *(data
+ cur_byte
) &=
2140 ~((1 << (len
- cur_bitshift
)) - 1);
2141 *(data
+ cur_byte
) |= (stuff_to_put
>> cur_bitshift
);
2144 *(data
+ cur_byte
) = ((stuff_to_put
>> cur_bitshift
)
2145 & ((1 << FLOATFORMAT_CHAR_BIT
) - 1));
2146 cur_bitshift
+= FLOATFORMAT_CHAR_BIT
;
2147 if (order
== floatformat_little
)
2154 #ifdef HAVE_LONG_DOUBLE
2155 /* Return the fractional part of VALUE, and put the exponent of VALUE in *EPTR.
2156 The range of the returned value is >= 0.5 and < 1.0. This is equivalent to
2157 frexp, but operates on the long double data type. */
2159 static long double ldfrexp
PARAMS ((long double value
, int *eptr
));
2162 ldfrexp (value
, eptr
)
2169 /* Unfortunately, there are no portable functions for extracting the exponent
2170 of a long double, so we have to do it iteratively by multiplying or dividing
2171 by two until the fraction is between 0.5 and 1.0. */
2179 if (value
>= tmp
) /* Value >= 1.0 */
2180 while (value
>= tmp
)
2185 else if (value
!= 0.0l) /* Value < 1.0 and > 0.0 */
2199 #endif /* HAVE_LONG_DOUBLE */
2202 /* The converse: convert the DOUBLEST *FROM to an extended float
2203 and store where TO points. Neither FROM nor TO have any alignment
2207 floatformat_from_doublest (fmt
, from
, to
)
2208 CONST
struct floatformat
*fmt
;
2215 unsigned int mant_bits
, mant_off
;
2217 unsigned char *uto
= (unsigned char *)to
;
2219 memcpy (&dfrom
, from
, sizeof (dfrom
));
2220 memset (uto
, 0, fmt
->totalsize
/ FLOATFORMAT_CHAR_BIT
);
2222 return; /* Result is zero */
2226 put_field (uto
, fmt
->byteorder
, fmt
->totalsize
, fmt
->exp_start
,
2227 fmt
->exp_len
, fmt
->exp_nan
);
2228 /* Be sure it's not infinity, but NaN value is irrel */
2229 put_field (uto
, fmt
->byteorder
, fmt
->totalsize
, fmt
->man_start
,
2234 /* If negative, set the sign bit. */
2237 put_field (uto
, fmt
->byteorder
, fmt
->totalsize
, fmt
->sign_start
, 1, 1);
2241 /* How to tell an infinity from an ordinary number? FIXME-someday */
2243 #ifdef HAVE_LONG_DOUBLE
2244 mant
= ldfrexp (dfrom
, &exponent
);
2246 mant
= frexp (dfrom
, &exponent
);
2249 put_field (uto
, fmt
->byteorder
, fmt
->totalsize
, fmt
->exp_start
, fmt
->exp_len
,
2250 exponent
+ fmt
->exp_bias
- 1);
2252 mant_bits_left
= fmt
->man_len
;
2253 mant_off
= fmt
->man_start
;
2254 while (mant_bits_left
> 0)
2256 unsigned long mant_long
;
2257 mant_bits
= mant_bits_left
< 32 ? mant_bits_left
: 32;
2259 mant
*= 4294967296.0;
2260 mant_long
= (unsigned long)mant
;
2263 /* If the integer bit is implicit, then we need to discard it.
2264 If we are discarding a zero, we should be (but are not) creating
2265 a denormalized number which means adjusting the exponent
2267 if (mant_bits_left
== fmt
->man_len
2268 && fmt
->intbit
== floatformat_intbit_no
)
2270 mant_long
&= 0x7fffffff;
2273 else if (mant_bits
< 32)
2275 /* The bits we want are in the most significant MANT_BITS bits of
2276 mant_long. Move them to the least significant. */
2277 mant_long
>>= 32 - mant_bits
;
2280 put_field (uto
, fmt
->byteorder
, fmt
->totalsize
,
2281 mant_off
, mant_bits
, mant_long
);
2282 mant_off
+= mant_bits
;
2283 mant_bits_left
-= mant_bits
;