/* Printing of backtraces and error messages
- * Copyright (C) 1996,1997,1998 Free Software Foundation
+ * Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation
*
* 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 author can be reached at djurfeldt@nada.kth.se
* Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN */
+
+
#include <stdio.h>
-#include "_scm.h"
-#include "stacks.h"
-#include "srcprop.h"
-#include "genio.h"
-#include "struct.h"
-#include "strports.h"
-#include "throw.h"
-#include "fluids.h"
+#include <ctype.h>
+
+#include "libguile/_scm.h"
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
-#include "backtrace.h"
+#include "libguile/stacks.h"
+#include "libguile/srcprop.h"
+#include "libguile/struct.h"
+#include "libguile/strports.h"
+#include "libguile/throw.h"
+#include "libguile/fluids.h"
+#include "libguile/ports.h"
+#include "libguile/strings.h"
+
+#include "libguile/validate.h"
+#include "libguile/lang.h"
+#include "libguile/backtrace.h"
+#include "libguile/filesys.h"
/* {Error reporting and backtraces}
* (A first approximation.)
return SCM_BOOL_F;
#endif
-SCM scm_the_last_stack_fluid;
+SCM scm_the_last_stack_fluid_var;
-static void display_header SCM_P ((SCM source, SCM port));
static void
-display_header (source, port)
- SCM source;
- SCM port;
+display_header (SCM source, SCM port)
{
- SCM fname = (SCM_NIMP (source) && SCM_MEMOIZEDP (source)
- ? scm_source_property (source, scm_i_filename)
- : SCM_BOOL_F);
- if (SCM_NIMP (fname) && SCM_STRINGP (fname))
+ if (SCM_MEMOIZEDP (source))
{
- scm_prin1 (fname, port, 0);
- scm_putc (':', port);
- scm_intprint (SCM_INUM (scm_source_property (source, scm_i_line)) + 1,
- 10,
- port);
- scm_putc (':', port);
- scm_intprint (SCM_INUM (scm_source_property (source, scm_i_column)) + 1,
- 10,
- port);
+ SCM fname = scm_source_property (source, scm_sym_filename);
+ SCM line = scm_source_property (source, scm_sym_line);
+ SCM col = scm_source_property (source, scm_sym_column);
+
+ /* Dirk:FIXME:: Maybe we should store the _port_ rather than the
+ * filename with the source properties? Then we could in case of
+ * non-file ports give at least some more details than just
+ * "<unnamed port>". */
+ if (SCM_STRINGP (fname))
+ scm_prin1 (fname, port, 0);
+ else
+ scm_puts ("<unnamed port>", port);
+
+ if (!SCM_FALSEP (line) && !SCM_FALSEP (col))
+ {
+ scm_putc (':', port);
+ scm_intprint (SCM_INUM (line) + 1, 10, port);
+ scm_putc (':', port);
+ scm_intprint (SCM_INUM (col) + 1, 10, port);
+ }
}
else
scm_puts ("ERROR", port);
void
-scm_display_error_message (message, args, port)
- SCM message;
- SCM args;
- SCM port;
+scm_display_error_message (SCM message, SCM args, SCM port)
{
- int writingp;
- char *start;
- char *p;
-
- if (SCM_IMP (message) || !SCM_ROSTRINGP (message) || SCM_IMP (args)
- || !scm_list_p (args))
+ if (SCM_STRINGP (message) && !SCM_FALSEP (scm_list_p (args)))
{
- scm_prin1 (message, port, 0);
- scm_putc ('\n', port);
- return;
+ scm_simple_format (port, message, args);
+ scm_newline (port);
+ }
+ else
+ {
+ scm_display (message, port);
+ scm_newline (port);
}
-
- SCM_COERCE_SUBSTR (message);
- start = SCM_ROCHARS (message);
- for (p = start; *p != '\0'; ++p)
- if (*p == '%')
- {
- if (SCM_IMP (args) || SCM_NCONSP (args))
- continue;
-
- ++p;
- if (*p == 's')
- writingp = 0;
- else if (*p == 'S')
- writingp = 1;
- else
- continue;
-
- scm_lfwrite (start, p - start - 1, port);
- scm_prin1 (SCM_CAR (args), port, writingp);
- args = SCM_CDR (args);
- start = p + 1;
- }
- scm_lfwrite (start, p - start, port);
- scm_putc ('\n', port);
}
-static void display_expression SCM_P ((SCM frame, SCM pname, SCM source, SCM port));
static void
-display_expression (frame, pname, source, port)
- SCM frame;
- SCM pname;
- SCM source;
- SCM port;
+display_expression (SCM frame,SCM pname,SCM source,SCM port)
{
SCM print_state = scm_make_print_state ();
scm_print_state *pstate = SCM_PRINT_STATE (print_state);
pstate->fancyp = 1;
pstate->level = 2;
pstate->length = 3;
- if (SCM_NIMP (pname) && SCM_ROSTRINGP (pname))
+ if (SCM_SYMBOLP (pname) || SCM_STRINGP (pname))
{
- if (SCM_NIMP (frame)
- && SCM_FRAMEP (frame)
+ if (SCM_FRAMEP (frame)
&& SCM_FRAME_EVAL_ARGS_P (frame))
scm_puts ("While evaluating arguments to ", port);
else
scm_puts ("In procedure ", port);
scm_iprin1 (pname, port, pstate);
- if (SCM_NIMP (source) && SCM_MEMOIZEDP (source))
+ if (SCM_MEMOIZEDP (source))
{
scm_puts (" in expression ", port);
pstate->writingp = 1;
scm_iprin1 (scm_unmemoize (source), port, pstate);
}
}
- else if (SCM_NIMP (source))
+ else if (SCM_MEMOIZEDP (source))
{
scm_puts ("In expression ", port);
pstate->writingp = 1;
{
SCM current_frame = SCM_BOOL_F;
SCM source = SCM_BOOL_F;
- SCM pname = SCM_BOOL_F;
SCM prev_frame = SCM_BOOL_F;
+ SCM pname = a->subr;
if (SCM_DEBUGGINGP
- && SCM_NIMP (a->stack)
&& SCM_STACKP (a->stack)
&& SCM_STACK_LENGTH (a->stack) > 0)
{
current_frame = scm_stack_ref (a->stack, SCM_INUM0);
source = SCM_FRAME_SOURCE (current_frame);
prev_frame = SCM_FRAME_PREV (current_frame);
- if (!(SCM_NIMP (source) && SCM_MEMOIZEDP (source))
- && prev_frame != SCM_BOOL_F)
+ if (!SCM_MEMOIZEDP (source) && !SCM_FALSEP (prev_frame))
source = SCM_FRAME_SOURCE (prev_frame);
- if (SCM_FRAME_PROC_P (current_frame)
- && scm_procedure_p (SCM_FRAME_PROC (current_frame)) == SCM_BOOL_T)
+ if (!SCM_SYMBOLP (pname) && !SCM_STRINGP (pname) && SCM_FRAME_PROC_P (current_frame)
+ && SCM_EQ_P (scm_procedure_p (SCM_FRAME_PROC (current_frame)), SCM_BOOL_T))
pname = scm_procedure_name (SCM_FRAME_PROC (current_frame));
}
- if (!(SCM_NIMP (pname) && SCM_ROSTRINGP (pname)))
- pname = a->subr;
- if ((SCM_NIMP (source) && SCM_MEMOIZEDP (source))
- || (SCM_NIMP (pname) && SCM_ROSTRINGP (pname)))
+ if (SCM_SYMBOLP (pname) || SCM_STRINGP (pname) || SCM_MEMOIZEDP (source))
{
display_header (source, a->port);
display_expression (current_frame, pname, source, a->port);
Note that it is very important that this handler *doesn't* try to
print more than the error tag, since the error very probably is
caused by an erroneous print call-back routine. If we would
- tru to print all objects, we would enter an infinite loop. */
+ try to print all objects, we would enter an infinite loop. */
static SCM
display_error_handler (struct display_error_handler_data *data,
- SCM tag, SCM args)
+ SCM tag, SCM args SCM_UNUSED)
{
SCM print_state = scm_make_print_state ();
scm_puts ("\nException during displaying of ", data->port);
return SCM_UNSPECIFIED;
}
-SCM_PROC(s_display_error, "display-error", 6, 0, 0, scm_display_error);
-SCM
-scm_display_error (stack, port, subr, message, args, rest)
- SCM stack;
- SCM port;
- SCM subr;
- SCM message;
- SCM args;
- SCM rest;
+
+/* The function scm_i_display_error prints out a detailed error message. This
+ * function will be called directly within libguile to signal error messages.
+ * No parameter checks will be performed by scm_i_display_error. Thus, User
+ * code should rather use the function scm_display_error.
+ */
+void
+scm_i_display_error (SCM stack, SCM port, SCM subr, SCM message, SCM args, SCM rest)
{
struct display_error_args a;
struct display_error_handler_data data;
data.mode = "error";
data.port = port;
scm_internal_catch (SCM_BOOL_T,
- (scm_catch_body_t) display_error_body, &a,
- (scm_catch_handler_t) display_error_handler, &data);
+ (scm_t_catch_body) display_error_body, &a,
+ (scm_t_catch_handler) display_error_handler, &data);
+}
+
+
+SCM_DEFINE (scm_display_error, "display-error", 6, 0, 0,
+ (SCM stack, SCM port, SCM subr, SCM message, SCM args, SCM rest),
+ "Display an error message to the output port @var{port}.\n"
+ "@var{stack} is the saved stack for the error, @var{subr} is\n"
+ "the name of the procedure in which the error occured and\n"
+ "@var{message} is the actual error message, which may contain\n"
+ "formatting instructions. These will format the arguments in\n"
+ "the list @var{args} accordingly. @var{rest} is currently\n"
+ "ignored.")
+#define FUNC_NAME s_scm_display_error
+{
+ SCM_VALIDATE_OUTPUT_PORT (2, port);
+
+ scm_i_display_error (stack, port, subr, message, args, rest);
+
return SCM_UNSPECIFIED;
}
+#undef FUNC_NAME
+
+
+typedef struct {
+ int level;
+ int length;
+} print_params_t;
+
+static int n_print_params = 9;
+static print_params_t default_print_params[] = {
+ { 4, 9 }, { 4, 3 },
+ { 3, 4 }, { 3, 3 },
+ { 2, 4 }, { 2, 3 },
+ { 1, 4 }, { 1, 3 }, { 1, 2 }
+};
+static print_params_t *print_params = default_print_params;
+
+#ifdef GUILE_DEBUG
+SCM_DEFINE (scm_set_print_params_x, "set-print-params!", 1, 0, 0,
+ (SCM params),
+ "Set the print parameters to the values from @var{params}.\n"
+ "@var{params} must be a list of two-element lists which must\n"
+ "hold two integer values.")
+#define FUNC_NAME s_scm_set_print_params_x
+{
+ int i;
+ int n;
+ SCM ls;
+ print_params_t *new_params;
+
+ SCM_VALIDATE_NONEMPTYLIST_COPYLEN (2, params, n);
+ for (ls = params; !SCM_NULL_OR_NIL_P (ls); ls = SCM_CDR (ls))
+ SCM_ASSERT (scm_ilength (SCM_CAR (params)) == 2
+ && SCM_INUMP (SCM_CAAR (ls))
+ && SCM_INUM (SCM_CAAR (ls)) >= 0
+ && SCM_INUMP (SCM_CADAR (ls))
+ && SCM_INUM (SCM_CADAR (ls)) >= 0,
+ params,
+ SCM_ARG2,
+ s_scm_set_print_params_x);
+ new_params = scm_malloc (n * sizeof (print_params_t));
+ if (print_params != default_print_params)
+ free (print_params);
+ print_params = new_params;
+ for (i = 0; i < n; ++i)
+ {
+ print_params[i].level = SCM_INUM (SCM_CAAR (params));
+ print_params[i].length = SCM_INUM (SCM_CADAR (params));
+ params = SCM_CDR (params);
+ }
+ n_print_params = n;
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+#endif
-static void indent SCM_P ((int n, SCM port));
static void
-indent (n, port)
- int n;
- SCM port;
+indent (int n, SCM port)
{
int i;
for (i = 0; i < n; ++i)
scm_putc (' ', port);
}
-static void display_frame_expr SCM_P ((char *hdr, SCM exp, char *tlr, int indentation, SCM sport, SCM port, scm_print_state *pstate));
static void
-display_frame_expr (hdr, exp, tlr, indentation, sport, port, pstate)
- char *hdr;
- SCM exp;
- char *tlr;
- int indentation;
- SCM sport;
- SCM port;
- scm_print_state *pstate;
+display_frame_expr (char *hdr,SCM exp,char *tlr,int indentation,SCM sport,SCM port,scm_print_state *pstate)
{
- if (SCM_NIMP (exp) && SCM_CONSP (exp))
+ SCM string;
+ int i = 0, n;
+ scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (sport);
+ do
{
- scm_iprlist (hdr, exp, tlr[0], port, pstate);
- scm_puts (&tlr[1], port);
+ pstate->length = print_params[i].length;
+ ptob->seek (sport, 0, SEEK_SET);
+ if (SCM_CONSP (exp))
+ {
+ pstate->level = print_params[i].level - 1;
+ scm_iprlist (hdr, exp, tlr[0], sport, pstate);
+ scm_puts (&tlr[1], sport);
+ }
+ else
+ {
+ pstate->level = print_params[i].level;
+ scm_iprin1 (exp, sport, pstate);
+ }
+ ptob->flush (sport);
+ n = ptob->seek (sport, 0, SEEK_CUR);
+ ++i;
}
- else
- scm_iprin1 (exp, port, pstate);
- scm_putc ('\n', port);
+ while (indentation + n > SCM_BACKTRACE_WIDTH && i < n_print_params);
+ ptob->truncate (sport, n);
+ string = scm_strport_to_string (sport);
+ /* Remove control characters */
+ for (i = 0; i < n; ++i)
+ if (iscntrl (SCM_STRING_CHARS (string)[i]))
+ SCM_STRING_CHARS (string)[i] = ' ';
+ /* Truncate */
+ if (indentation + n > SCM_BACKTRACE_WIDTH)
+ {
+ n = SCM_BACKTRACE_WIDTH - indentation;
+ SCM_STRING_CHARS (string)[n - 1] = '$';
+ }
+
+ scm_lfwrite (SCM_STRING_CHARS (string), n, port);
}
-static void display_application SCM_P ((SCM frame, int indentation, SCM sport, SCM port, scm_print_state *pstate));
static void
-display_application (frame, indentation, sport, port, pstate)
- SCM frame;
- int indentation;
- SCM sport;
- SCM port;
- scm_print_state *pstate;
+display_application (SCM frame,int indentation,SCM sport,SCM port,scm_print_state *pstate)
{
SCM proc = SCM_FRAME_PROC (frame);
- SCM name = (SCM_NFALSEP (scm_procedure_p (proc))
+ SCM name = (!SCM_FALSEP (scm_procedure_p (proc))
? scm_procedure_name (proc)
: SCM_BOOL_F);
display_frame_expr ("[",
- scm_cons (SCM_NFALSEP (name) ? name : proc,
+ scm_cons (!SCM_FALSEP (name) ? name : proc,
SCM_FRAME_ARGS (frame)),
SCM_FRAME_EVAL_ARGS_P (frame) ? " ..." : "]",
indentation,
pstate);
}
-SCM_PROC(s_display_application, "display-application", 1, 1, 0, scm_display_application);
-
-SCM
-scm_display_application (SCM frame, SCM port)
+SCM_DEFINE (scm_display_application, "display-application", 1, 2, 0,
+ (SCM frame, SCM port, SCM indent),
+ "Display a procedure application @var{frame} to the output port\n"
+ "@var{port}. @var{indent} specifies the indentation of the\n"
+ "output.")
+#define FUNC_NAME s_scm_display_application
{
+ SCM_VALIDATE_FRAME (1,frame);
if (SCM_UNBNDP (port))
port = scm_cur_outp;
+ else
+ SCM_VALIDATE_OPOUTPORT (2,port);
+ if (SCM_UNBNDP (indent))
+ indent = SCM_INUM0;
+ else
+ SCM_VALIDATE_INUM (3,indent);
+
if (SCM_FRAME_PROC_P (frame))
/* Display an application. */
{
- SCM print_state;
+ SCM sport, print_state;
scm_print_state *pstate;
+ /* Create a string port used for adaptation of printing parameters. */
+ sport = scm_mkstrport (SCM_INUM0,
+ scm_make_string (SCM_MAKINUM (240),
+ SCM_UNDEFINED),
+ SCM_OPN | SCM_WRTNG,
+ FUNC_NAME);
+
/* Create a print state for printing of frames. */
print_state = scm_make_print_state ();
pstate = SCM_PRINT_STATE (print_state);
pstate->writingp = 1;
pstate->fancyp = 1;
- pstate->level = 2;
- pstate->length = 9;
- display_application (frame, 0, SCM_BOOL_F, port, pstate); /*fixme*/
+ display_application (frame, SCM_INUM (indent), sport, port, pstate);
return SCM_BOOL_T;
}
else
return SCM_BOOL_F;
}
+#undef FUNC_NAME
+
+SCM_SYMBOL (sym_base, "base");
+
+static void
+display_backtrace_get_file_line (SCM frame, SCM *file, SCM *line)
+{
+ SCM source = SCM_FRAME_SOURCE (frame);
+ *file = SCM_MEMOIZEDP (source) ? scm_source_property (source, scm_sym_filename) : SCM_BOOL_F;
+ *line = (SCM_MEMOIZEDP (source)) ? scm_source_property (source, scm_sym_line) : SCM_BOOL_F;
+}
-static void display_frame SCM_P ((SCM frame, int nfield, int indentation, SCM sport, SCM port, scm_print_state *pstate));
static void
-display_frame (frame, nfield, indentation, sport, port, pstate)
+display_backtrace_file (frame, last_file, port, pstate)
SCM frame;
- int nfield;
- int indentation;
- SCM sport;
+ SCM *last_file;
SCM port;
scm_print_state *pstate;
+{
+ SCM file, line;
+
+ display_backtrace_get_file_line (frame, &file, &line);
+
+ if (SCM_EQ_P (file, *last_file))
+ return;
+
+ *last_file = file;
+
+ scm_puts ("In ", port);
+ if (SCM_FALSEP (file))
+ if (SCM_FALSEP (line))
+ scm_puts ("unknown file", port);
+ else
+ scm_puts ("current input", port);
+ else
+ {
+ pstate->writingp = 0;
+ scm_iprin1 (file, port, pstate);
+ pstate->writingp = 1;
+ }
+ scm_puts (":\n", port);
+}
+
+static void
+display_backtrace_file_and_line (SCM frame, SCM port, scm_print_state *pstate)
+{
+ SCM file, line;
+
+ display_backtrace_get_file_line (frame, &file, &line);
+
+ if (SCM_EQ_P (SCM_SHOW_FILE_NAME, sym_base))
+ {
+ if (SCM_FALSEP (file))
+ {
+ if (SCM_FALSEP (line))
+ scm_putc ('?', port);
+ else
+ scm_puts ("<stdin>", port);
+ }
+ else
+ {
+ pstate -> writingp = 0;
+#ifdef HAVE_POSIX
+ scm_iprin1 (SCM_STRINGP (file) ? scm_basename (file, SCM_UNDEFINED) : file,
+ port, pstate);
+#else
+ scm_iprin1 (file, port, pstate);
+#endif
+ pstate -> writingp = 1;
+ }
+
+ scm_putc (':', port);
+ }
+ else if (!SCM_FALSEP (line))
+ {
+ int i, j=0;
+ for (i = SCM_INUM (line)+1; i > 0; i = i/10, j++)
+ ;
+ indent (4-j, port);
+ }
+
+ if (SCM_FALSEP (line))
+ scm_puts (" ?", port);
+ else
+ scm_intprint (SCM_INUM (line) + 1, 10, port);
+ scm_puts (": ", port);
+}
+
+static void
+display_frame (SCM frame,int nfield,int indentation,SCM sport,SCM port,scm_print_state *pstate)
{
int n, i, j;
scm_puts ("...\n", port);
}
+ /* display file name and line number */
+ if (!SCM_FALSEP (SCM_SHOW_FILE_NAME))
+ display_backtrace_file_and_line (frame, port, pstate);
+
/* Check size of frame number. */
n = SCM_FRAME_NUMBER (frame);
for (i = 0, j = n; j > 0; ++i) j /= 10;
/* Display a special form. */
{
SCM source = SCM_FRAME_SOURCE (frame);
- SCM copy = scm_source_property (source, scm_i_copy);
+ SCM copy = (SCM_CONSP (source)
+ ? scm_source_property (source, scm_sym_copy)
+ : SCM_BOOL_F);
+ SCM umcopy = (SCM_MEMOIZEDP (source)
+ ? scm_unmemoize (source)
+ : SCM_BOOL_F);
display_frame_expr ("(",
- SCM_NIMP (copy) && SCM_CONSP (copy)
- ? copy
- : scm_unmemoize (source),
+ SCM_CONSP (copy) ? copy : umcopy,
")",
nfield + 1 + indentation,
sport,
port,
pstate);
}
+ scm_putc ('\n', port);
/* Announce missing frames? */
if (SCM_BACKWARDS_P && SCM_FRAME_OVERFLOW_P (frame))
SCM depth;
};
-SCM_PROC(s_display_backtrace, "display-backtrace", 2, 2, 0, scm_display_backtrace);
-
static SCM
display_backtrace_body (struct display_backtrace_args *a)
+#define FUNC_NAME "display_backtrace_body"
{
int n_frames, beg, end, n, i, j;
int nfield, indent_p, indentation;
SCM frame, sport, print_state;
+ SCM last_file;
scm_print_state *pstate;
a->port = SCM_COERCE_OUTPORT (a->port);
/* Argument checking and extraction. */
- SCM_ASSERT (SCM_NIMP (a->stack) && SCM_STACKP (a->stack),
- a->stack,
- SCM_ARG1,
- s_display_backtrace);
- SCM_ASSERT (SCM_NIMP (a->port) && SCM_OPOUTPORTP (a->port),
- a->port,
- SCM_ARG2,
- s_display_backtrace);
+ SCM_VALIDATE_STACK (1, a->stack);
+ SCM_VALIDATE_OPOUTPORT (2, a->port);
n_frames = SCM_INUM (scm_stack_length (a->stack));
n = SCM_INUMP (a->depth) ? SCM_INUM (a->depth) : SCM_BACKTRACE_DEPTH;
if (SCM_BACKWARDS_P)
sport = scm_mkstrport (SCM_INUM0,
scm_make_string (SCM_MAKINUM (240), SCM_UNDEFINED),
SCM_OPN | SCM_WRTNG,
- s_display_backtrace);
+ FUNC_NAME);
/* Create a print state for printing of frames. */
print_state = scm_make_print_state ();
pstate = SCM_PRINT_STATE (print_state);
pstate->writingp = 1;
pstate->fancyp = 1;
- pstate->level = 2;
- pstate->length = 3;
/* First find out if it's reasonable to do indentation. */
if (SCM_BACKWARDS_P)
indent_p = 0;
else
{
+ unsigned int j;
+
indent_p = 1;
frame = scm_stack_ref (a->stack, SCM_MAKINUM (beg));
for (i = 0, j = 0; i < n; ++i)
for (i = 0; j > 0; ++i) j /= 10;
nfield = i ? i : 1;
- scm_puts ("Backtrace:\n", a->port);
-
/* Print frames. */
frame = scm_stack_ref (a->stack, SCM_MAKINUM (beg));
indentation = 1;
- display_frame (frame, nfield, indentation, sport, a->port, pstate);
- for (i = 1; i < n; ++i)
+ last_file = SCM_UNDEFINED;
+ for (i = 0; i < n; ++i)
{
+ if (!SCM_EQ_P (SCM_SHOW_FILE_NAME, sym_base))
+ display_backtrace_file (frame, &last_file, a->port, pstate);
+
+ display_frame (frame, nfield, indentation, sport, a->port, pstate);
if (indent_p && SCM_FRAME_EVAL_ARGS_P (frame))
++indentation;
- frame = SCM_BACKWARDS_P ? SCM_FRAME_PREV (frame) : SCM_FRAME_NEXT (frame);
- display_frame (frame, nfield, indentation, sport, a->port, pstate);
+ frame = (SCM_BACKWARDS_P ?
+ SCM_FRAME_PREV (frame) : SCM_FRAME_NEXT (frame));
}
+ scm_remember_upto_here_1 (print_state);
+
return SCM_UNSPECIFIED;
}
-
-SCM
-scm_display_backtrace (stack, port, first, depth)
- SCM stack;
- SCM port;
- SCM first;
- SCM depth;
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_display_backtrace, "display-backtrace", 2, 2, 0,
+ (SCM stack, SCM port, SCM first, SCM depth),
+ "Display a backtrace to the output port @var{port}. @var{stack}\n"
+ "is the stack to take the backtrace from, @var{first} specifies\n"
+ "where in the stack to start and @var{depth} how much frames\n"
+ "to display. Both @var{first} and @var{depth} can be @code{#f},\n"
+ "which means that default values will be used.")
+#define FUNC_NAME s_scm_display_backtrace
{
struct display_backtrace_args a;
struct display_error_handler_data data;
data.mode = "backtrace";
data.port = port;
scm_internal_catch (SCM_BOOL_T,
- (scm_catch_body_t) display_backtrace_body, &a,
- (scm_catch_handler_t) display_error_handler, &data);
+ (scm_t_catch_body) display_backtrace_body, &a,
+ (scm_t_catch_handler) display_error_handler, &data);
return SCM_UNSPECIFIED;
}
+#undef FUNC_NAME
-SCM_VCELL (scm_has_shown_backtrace_hint_p_var, "has-shown-backtrace-hint?");
+SCM_VARIABLE (scm_has_shown_backtrace_hint_p_var, "has-shown-backtrace-hint?");
-SCM_PROC(s_backtrace, "backtrace", 0, 0, 0, scm_backtrace);
-SCM
-scm_backtrace ()
+SCM_DEFINE (scm_backtrace, "backtrace", 0, 0, 0,
+ (),
+ "Display a backtrace of the stack saved by the last error\n"
+ "to the current output port.")
+#define FUNC_NAME s_scm_backtrace
{
- SCM the_last_stack = scm_fluid_ref (SCM_CDR (scm_the_last_stack_fluid));
- if (SCM_NFALSEP (the_last_stack))
+ SCM the_last_stack =
+ scm_fluid_ref (SCM_VARIABLE_REF (scm_the_last_stack_fluid_var));
+ if (!SCM_FALSEP (the_last_stack))
{
scm_newline (scm_cur_outp);
+ scm_puts ("Backtrace:\n", scm_cur_outp);
scm_display_backtrace (the_last_stack,
scm_cur_outp,
SCM_UNDEFINED,
SCM_UNDEFINED);
scm_newline (scm_cur_outp);
- if (SCM_FALSEP (SCM_CDR (scm_has_shown_backtrace_hint_p_var))
+ if (SCM_FALSEP (SCM_VARIABLE_REF (scm_has_shown_backtrace_hint_p_var))
&& !SCM_BACKTRACE_P)
{
scm_puts ("Type \"(debug-enable 'backtrace)\" if you would like "
"a backtrace\n"
"automatically if an error occurs in the future.\n",
scm_cur_outp);
- SCM_SETCDR (scm_has_shown_backtrace_hint_p_var, SCM_BOOL_T);
+ SCM_VARIABLE_SET (scm_has_shown_backtrace_hint_p_var, SCM_BOOL_T);
}
}
else
}
return SCM_UNSPECIFIED;
}
+#undef FUNC_NAME
\f
scm_init_backtrace ()
{
SCM f = scm_make_fluid ();
- scm_the_last_stack_fluid = scm_sysintern ("the-last-stack", f);
+ scm_the_last_stack_fluid_var = scm_c_define ("the-last-stack", f);
-#include "backtrace.x"
+#ifndef SCM_MAGIC_SNARFER
+#include "libguile/backtrace.x"
+#endif
}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff