-/* Copyright (C) 1995,1996 Free Software Foundation, Inc.
+/* Copyright (C) 1995-1999 Free Software Foundation, Inc.
*
* 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
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice.
- */
+ * If you do not wish that, delete this exception notice. */
\f
#include <stdio.h>
#include "_scm.h"
#include "chars.h"
#include "genio.h"
-#include "mbstrings.h"
#include "smob.h"
#include "eval.h"
+#include "macros.h"
#include "procprop.h"
#include "read.h"
#include "weaks.h"
#include "unif.h"
+#include "alist.h"
+#include "struct.h"
+#include "objects.h"
#include "print.h"
\f
"#<undefined>",
"#<eof>",
"()",
- "#<unspecified>"
+ "#<unspecified>",
+ "#@dispatch",
+ "#@slot-ref",
+ "#@slot-set!",
+
+ /* Multi-language support */
+
+ "#@nil-cond",
+ "#@nil-ify",
+ "#@t-ify",
+ "#@0-cond",
+ "#@0-ify",
+ "#@1-ify",
+ "#@bind",
+
+ "#@delay"
};
-#ifdef DEBUG_EXTENSIONS
scm_option scm_print_opts[] = {
- { SCM_OPTION_BOOLEAN, "procnames", 0,
- "Print names instead of closures." },
{ SCM_OPTION_SCM, "closure-hook", SCM_BOOL_F,
- "Procedure used to print closures." }
+ "Hook for printing closures." },
+ { SCM_OPTION_BOOLEAN, "source", 0,
+ "Print closures with source." }
};
SCM_PROC (s_print_options, "print-options-interface", 0, 1, 0, scm_print_options);
-#ifdef __STDC__
-SCM
-scm_print_options (SCM new_values)
-#else
+
SCM
-scm_print_options (new_values)
- SCM new_values;
-#endif
+scm_print_options (setting)
+ SCM setting;
{
- SCM ans = scm_options (new_values,
+ SCM ans = scm_options (setting,
scm_print_opts,
SCM_N_PRINT_OPTIONS,
s_print_options);
return ans;
}
-#endif
\f
/* {Printing of Scheme Objects}
*/
-/* Print generally. Handles both write and display according to WRITING.
+/* Detection of circular references.
+ *
+ * Due to other constraints in the implementation, this code has bad
+ * time complexity (O (depth * N)), The printer code will be
+ * completely rewritten before next release of Guile. The new code
+ * will be O(N).
*/
-#ifdef __STDC__
-void
-scm_iprin1 (SCM exp, SCM port, int writing)
-#else
+#define PUSH_REF(pstate, obj) \
+{ \
+ pstate->ref_stack[pstate->top++] = (obj); \
+ if (pstate->top == pstate->ceiling) \
+ grow_ref_stack (pstate); \
+}
+
+#define ENTER_NESTED_DATA(pstate, obj, label) \
+{ \
+ register unsigned long i; \
+ for (i = 0; i < pstate->top; ++i) \
+ if (pstate->ref_stack[i] == (obj)) \
+ goto label; \
+ if (pstate->fancyp) \
+ { \
+ if (pstate->top - pstate->list_offset >= pstate->level) \
+ { \
+ scm_putc ('#', port); \
+ return; \
+ } \
+ } \
+ PUSH_REF(pstate, obj); \
+} \
+
+#define EXIT_NESTED_DATA(pstate) { --pstate->top; }
+
+SCM scm_print_state_vtable;
+
+static SCM print_state_pool;
+
+#ifdef GUILE_DEBUG /* Used for debugging purposes */
+SCM_PROC(s_current_pstate, "current-pstate", 0, 0, 0, scm_current_pstate);
+
+SCM
+scm_current_pstate ()
+{
+ return SCM_CADR (print_state_pool);
+}
+#endif
+
+#define PSTATE_SIZE 50L
+
+static SCM make_print_state SCM_P ((void));
+
+static SCM
+make_print_state ()
+{
+ SCM print_state = scm_make_struct (SCM_CAR (print_state_pool), /* pstate type */
+ SCM_INUM0,
+ SCM_EOL);
+ scm_print_state *pstate = SCM_PRINT_STATE (print_state);
+ pstate->ref_vect = scm_make_vector (SCM_MAKINUM (PSTATE_SIZE),
+ SCM_UNDEFINED);
+ pstate->ref_stack = SCM_VELTS (pstate->ref_vect);
+ pstate->ceiling = SCM_LENGTH (pstate->ref_vect);
+ return print_state;
+}
+
+SCM
+scm_make_print_state ()
+{
+ SCM answer = 0;
+
+ /* First try to allocate a print state from the pool */
+ SCM_DEFER_INTS;
+ if (SCM_NNULLP (SCM_CDR (print_state_pool)))
+ {
+ answer = SCM_CADR (print_state_pool);
+ SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool));
+ }
+ SCM_ALLOW_INTS;
+
+ return answer ? answer : make_print_state ();
+}
+
+void
+scm_free_print_state (print_state)
+ SCM print_state;
+{
+ SCM handle;
+ scm_print_state *pstate = SCM_PRINT_STATE (print_state);
+ /* Cleanup before returning print state to pool.
+ * It is better to do it here. Doing it in scm_prin1
+ * would cost more since that function is called much more
+ * often.
+ */
+ pstate->fancyp = 0;
+ pstate->revealed = 0;
+ SCM_NEWCELL (handle);
+ SCM_DEFER_INTS;
+ SCM_SETCAR (handle, print_state);
+ SCM_SETCDR (handle, SCM_CDR (print_state_pool));
+ SCM_SETCDR (print_state_pool, handle);
+ SCM_ALLOW_INTS;
+}
+
+static void grow_ref_stack SCM_P ((scm_print_state *pstate));
+
+static void
+grow_ref_stack (pstate)
+ scm_print_state *pstate;
+{
+ int new_size = 2 * pstate->ceiling;
+ scm_vector_set_length_x (pstate->ref_vect, SCM_MAKINUM (new_size));
+ pstate->ref_stack = SCM_VELTS (pstate->ref_vect);
+ pstate->ceiling = new_size;
+}
+
+
+static void print_circref SCM_P ((SCM port, scm_print_state *pstate, SCM ref));
+
+static void
+print_circref (port, pstate, ref)
+ SCM port;
+ scm_print_state *pstate;
+ SCM ref;
+{
+ register int i;
+ int self = pstate->top - 1;
+ i = pstate->top - 1;
+ if (SCM_CONSP (pstate->ref_stack[i]))
+ {
+ while (i > 0)
+ {
+ if (SCM_NCONSP (pstate->ref_stack[i - 1])
+ || SCM_CDR (pstate->ref_stack[i - 1]) != pstate->ref_stack[i])
+ break;
+ --i;
+ }
+ self = i;
+ }
+ for (i = pstate->top - 1; 1; --i)
+ if (pstate->ref_stack[i] == ref)
+ break;
+ scm_putc ('#', port);
+ scm_intprint (i - self, 10, port);
+ scm_putc ('#', port);
+}
+
+/* Print generally. Handles both write and display according to PSTATE.
+ */
+SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write);
+SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display);
+
void
-scm_iprin1 (exp, port, writing)
+scm_iprin1 (exp, port, pstate)
SCM exp;
SCM port;
- int writing;
-#endif
+ scm_print_state *pstate;
{
- register long i;
taloop:
switch (7 & (int) exp)
{
case 4:
if (SCM_ICHRP (exp))
{
- i = SCM_ICHR (exp);
- scm_put_wchar (i, port, writing);
+ register long i;
+ i = SCM_ICHR (exp);
+ if (SCM_WRITINGP (pstate))
+ {
+ scm_puts ("#\\", port);
+ if ((i >= 0) && (i <= ' ') && scm_charnames[i])
+ scm_puts (scm_charnames[i], port);
+ else if (i < 0 || i > '\177')
+ scm_intprint (i, 8, port);
+ else
+ scm_putc (i, port);
+ }
+ else
+ scm_putc (i, port);
}
- else if ( SCM_IFLAGP (exp)
- && (SCM_ISYMNUM (exp) < (sizeof scm_isymnames / sizeof (char *))))
- scm_gen_puts (scm_regular_string, SCM_ISYMSCM_CHARS (exp), port);
+ else if (SCM_IFLAGP (exp)
+ && ((size_t) SCM_ISYMNUM (exp) < (sizeof scm_isymnames / sizeof (char *))))
+ scm_puts (SCM_ISYMCHARS (exp), port);
else if (SCM_ILOCP (exp))
{
- scm_gen_puts (scm_regular_string, "#@", port);
+ scm_puts ("#@", port);
scm_intprint ((long) SCM_IFRAME (exp), 10, port);
- scm_gen_putc (SCM_ICDRP (exp) ? '-' : '+', port);
+ scm_putc (SCM_ICDRP (exp) ? '-' : '+', port);
scm_intprint ((long) SCM_IDIST (exp), 10, port);
}
else
break;
case 1:
/* gloc */
- scm_gen_puts (scm_regular_string, "#@", port);
+ scm_puts ("#@", port);
exp = SCM_CAR (exp - 1);
goto taloop;
default:
if (SCM_CDR (SCM_CAR (exp) - 1L) == 0)
{
- scm_gen_write (scm_regular_string, "#<struct ", (scm_sizet) 9, port);
- scm_intprint(exp, 16, port);
- scm_gen_putc ('>', port);
+ ENTER_NESTED_DATA (pstate, exp, circref);
+ if (SCM_OBJ_CLASS_FLAGS (exp) & SCM_CLASSF_GOOPS)
+ {
+ SCM pwps, print = pstate->writingp ? g_write : g_display;
+ if (!print)
+ goto print_struct;
+ SCM_NEWSMOB (pwps,
+ scm_tc16_port_with_ps,
+ scm_cons (port, pstate->handle));
+ scm_call_generic_2 (print, exp, pwps);
+ }
+ else
+ {
+ print_struct:
+ scm_print_struct (exp, port, pstate);
+ }
+ EXIT_NESTED_DATA (pstate);
break;
}
case scm_tcs_cons_imcar:
case scm_tcs_cons_nimcar:
- scm_iprlist ("(", exp, ')', port, writing);
+ ENTER_NESTED_DATA (pstate, exp, circref);
+ scm_iprlist ("(", exp, ')', port, pstate);
+ EXIT_NESTED_DATA (pstate);
break;
- case scm_tcs_closures:
-#ifdef DEBUG_EXTENSIONS
- if (SCM_PRINT_PROCNAMES_P)
- {
- SCM name;
- name = scm_procedure_property (exp, scm_i_name);
- scm_gen_puts (scm_regular_string, "#<procedure", port);
- if (SCM_NFALSEP (name))
- {
- scm_gen_putc (' ', port);
- /* FIXME */
- scm_gen_puts (scm_regular_string, SCM_CHARS (name), port);
- }
- scm_gen_putc ('>', port);
- }
- else
-#endif
- {
- exp = SCM_CODE (exp);
- scm_iprlist ("#<CLOSURE ", exp, '>', port, writing);
- }
+ circref:
+ print_circref (port, pstate, exp);
break;
- case scm_tc7_mb_string:
- case scm_tc7_mb_substring:
- scm_print_mb_string (exp, port, writing);
+ macros:
+ if (!SCM_CLOSUREP (SCM_CDR (exp)))
+ goto prinmacro;
+ case scm_tcs_closures:
+ /* The user supplied print closure procedure must handle
+ macro closures as well. */
+ if (SCM_FALSEP (scm_procedure_p (SCM_PRINT_CLOSURE))
+ || SCM_FALSEP (scm_printer_apply (SCM_PRINT_CLOSURE,
+ exp, port, pstate)))
+ {
+ SCM name, code, env;
+ if (SCM_TYP16 (exp) == scm_tc16_macro)
+ {
+ /* Printing a macro. */
+ prinmacro:
+ name = scm_macro_name (exp);
+ if (!SCM_CLOSUREP (SCM_CDR (exp)))
+ {
+ code = env = 0;
+ scm_puts ("#<primitive-", port);
+ }
+ else
+ {
+ code = SCM_CODE (SCM_CDR (exp));
+ env = SCM_ENV (SCM_CDR (exp));
+ scm_puts ("#<", port);
+ }
+ if (SCM_CAR (exp) & (3L << 16))
+ scm_puts ("macro", port);
+ else
+ scm_puts ("syntax", port);
+ if (SCM_CAR (exp) & (2L << 16))
+ scm_putc ('!', port);
+ }
+ else
+ {
+ /* Printing a closure. */
+ name = scm_procedure_name (exp);
+ code = SCM_CODE (exp);
+ env = SCM_ENV (exp);
+ scm_puts ("#<procedure", port);
+ }
+ if (SCM_NIMP (name) && SCM_ROSTRINGP (name))
+ {
+ scm_putc (' ', port);
+ scm_puts (SCM_ROCHARS (name), port);
+ }
+ if (code)
+ {
+ if (SCM_PRINT_SOURCE_P)
+ {
+ code = scm_unmemocopy (code,
+ SCM_EXTEND_ENV (SCM_CAR (code),
+ SCM_EOL,
+ env));
+ ENTER_NESTED_DATA (pstate, exp, circref);
+ scm_iprlist (" ", code, '>', port, pstate);
+ EXIT_NESTED_DATA (pstate);
+ }
+ else
+ {
+ if (SCM_TYP16 (exp) != scm_tc16_macro)
+ {
+ scm_putc (' ', port);
+ scm_iprin1 (SCM_CAR (code), port, pstate);
+ }
+ scm_putc ('>', port);
+ }
+ }
+ else
+ scm_putc ('>', port);
+ }
break;
case scm_tc7_substring:
case scm_tc7_string:
- if (writing)
+ if (SCM_WRITINGP (pstate))
{
- scm_gen_putc ('\"', port);
+ scm_sizet i;
+
+ scm_putc ('"', port);
for (i = 0; i < SCM_ROLENGTH (exp); ++i)
switch (SCM_ROCHARS (exp)[i])
{
- case '\"':
+ case '"':
case '\\':
- scm_gen_putc ('\\', port);
+ scm_putc ('\\', port);
default:
- scm_gen_putc (SCM_ROCHARS (exp)[i], port);
+ scm_putc (SCM_ROCHARS (exp)[i], port);
}
- scm_gen_putc ('\"', port);
+ scm_putc ('"', port);
break;
}
else
- scm_gen_write (scm_regular_string, SCM_ROCHARS (exp),
- (scm_sizet) SCM_ROLENGTH (exp),
- port);
+ scm_lfwrite (SCM_ROCHARS (exp), (scm_sizet) SCM_ROLENGTH (exp),
+ port);
break;
case scm_tcs_symbols:
- if (SCM_MB_STRINGP (exp))
- {
- scm_print_mb_symbol (exp, port);
- break;
- }
- else
{
int pos;
int end;
char * str;
int weird;
int maybe_weird;
- int mw_pos;
+ int mw_pos = 0;
len = SCM_LENGTH (exp);
str = SCM_CHARS (exp);
maybe_weird = 0;
if (len == 0)
- scm_gen_write (scm_regular_string, "#{}#", 4, port);
+ scm_lfwrite ("#{}#", 4, port);
for (end = pos; end < len; ++end)
switch (str[end])
#endif
case '(':
case ')':
- case '\"':
+ case '"':
case ';':
case SCM_WHITE_SPACES:
case SCM_LINE_INCREMENTORS:
}
if (!weird)
{
- scm_gen_write (scm_regular_string, "#{", 2, port);
+ scm_lfwrite ("#{", 2, port);
weird = 1;
}
if (pos < end)
{
- scm_gen_write (scm_regular_string, str + pos, end - pos, port);
+ scm_lfwrite (str + pos, end - pos, port);
}
{
char buf[2];
buf[0] = '\\';
buf[1] = str[end];
- scm_gen_write (scm_regular_string, buf, 2, port);
+ scm_lfwrite (buf, 2, port);
}
pos = end + 1;
break;
break;
}
if (pos < end)
- scm_gen_write (scm_regular_string, str + pos, end - pos, port);
+ scm_lfwrite (str + pos, end - pos, port);
if (weird)
- scm_gen_write (scm_regular_string, "}#", 2, port);
+ scm_lfwrite ("}#", 2, port);
break;
}
case scm_tc7_wvect:
+ ENTER_NESTED_DATA (pstate, exp, circref);
if (SCM_IS_WHVEC (exp))
- scm_gen_puts (scm_regular_string, "#wh(", port);
+ scm_puts ("#wh(", port);
else
- scm_gen_puts (scm_regular_string, "#w(", port);
+ scm_puts ("#w(", port);
goto common_vector_printer;
case scm_tc7_vector:
- scm_gen_puts (scm_regular_string, "#(", port);
+ ENTER_NESTED_DATA (pstate, exp, circref);
+ scm_puts ("#(", port);
common_vector_printer:
- for (i = 0; i + 1 < SCM_LENGTH (exp); ++i)
- {
- /* CHECK_INTS; */
- scm_iprin1 (SCM_VELTS (exp)[i], port, writing);
- scm_gen_putc (' ', port);
- }
- if (i < SCM_LENGTH (exp))
- {
- /* CHECK_INTS; */
- scm_iprin1 (SCM_VELTS (exp)[i], port, writing);
- }
- scm_gen_putc (')', port);
+ {
+ register long i;
+ int last = SCM_LENGTH (exp) - 1;
+ int cutp = 0;
+ if (pstate->fancyp && SCM_LENGTH (exp) > pstate->length)
+ {
+ last = pstate->length - 1;
+ cutp = 1;
+ }
+ for (i = 0; i < last; ++i)
+ {
+ /* CHECK_INTS; */
+ scm_iprin1 (SCM_VELTS (exp)[i], port, pstate);
+ scm_putc (' ', port);
+ }
+ if (i == last)
+ {
+ /* CHECK_INTS; */
+ scm_iprin1 (SCM_VELTS (exp)[i], port, pstate);
+ }
+ if (cutp)
+ scm_puts (" ...", port);
+ scm_putc (')', port);
+ }
+ EXIT_NESTED_DATA (pstate);
break;
case scm_tc7_bvect:
case scm_tc7_byvect:
case scm_tc7_fvect:
case scm_tc7_dvect:
case scm_tc7_cvect:
-#ifdef LONGLONGS
+#ifdef HAVE_LONG_LONGS
case scm_tc7_llvect:
#endif
- scm_raprin1 (exp, port, writing);
+ scm_raprin1 (exp, port, pstate);
break;
case scm_tcs_subrs:
- scm_gen_puts (scm_regular_string, "#<primitive-procedure ", port);
- scm_gen_puts ((SCM_MB_STRINGP (SCM_SNAME(exp))
- ? scm_mb_string
- : scm_regular_string),
- SCM_CHARS (SCM_SNAME (exp)), port);
- scm_gen_putc ('>', port);
+ scm_puts (SCM_SUBR_GENERIC (exp) && *SCM_SUBR_GENERIC (exp)
+ ? "#<primitive-generic "
+ : "#<primitive-procedure ",
+ port);
+ scm_puts (SCM_CHARS (SCM_SNAME (exp)), port);
+ scm_putc ('>', port);
break;
#ifdef CCLO
case scm_tc7_cclo:
- scm_gen_puts (scm_regular_string, "#<compiled-closure ", port);
- scm_iprin1 (SCM_CCLO_SUBR (exp), port, writing);
- scm_gen_putc ('>', port);
+ {
+ SCM proc = SCM_CCLO_SUBR (exp);
+ if (proc == scm_f_gsubr_apply)
+ {
+ /* Print gsubrs as primitives */
+ SCM name = scm_procedure_name (exp);
+ scm_puts ("#<primitive-procedure", port);
+ if (SCM_NFALSEP (name))
+ {
+ scm_putc (' ', port);
+ scm_puts (SCM_CHARS (name), port);
+ }
+ }
+ else
+ {
+ scm_puts ("#<compiled-closure ", port);
+ scm_iprin1 (proc, port, pstate);
+ }
+ scm_putc ('>', port);
+ }
break;
#endif
+ case scm_tc7_pws:
+ scm_puts ("#<procedure-with-setter", port);
+ {
+ SCM name = scm_procedure_name (exp);
+ if (SCM_NFALSEP (name))
+ {
+ scm_putc (' ', port);
+ scm_puts (SCM_ROCHARS (name), port);
+ }
+ }
+ scm_putc ('>', port);
+ break;
case scm_tc7_contin:
- scm_gen_puts (scm_regular_string, "#<continuation ", port);
+ scm_puts ("#<continuation ", port);
scm_intprint (SCM_LENGTH (exp), 10, port);
- scm_gen_puts (scm_regular_string, " @ ", port);
+ scm_puts (" @ ", port);
scm_intprint ((long) SCM_CHARS (exp), 16, port);
- scm_gen_putc ('>', port);
+ scm_putc ('>', port);
break;
case scm_tc7_port:
- i = SCM_PTOBNUM (exp);
- if (i < scm_numptob && scm_ptobs[i].print && (scm_ptobs[i].print) (exp, port, writing))
- break;
- goto punk;
+ {
+ register long i = SCM_PTOBNUM (exp);
+ if (i < scm_numptob
+ && scm_ptobs[i].print
+ && (scm_ptobs[i].print) (exp, port, pstate))
+ break;
+ goto punk;
+ }
case scm_tc7_smob:
- i = SCM_SMOBNUM (exp);
- if (i < scm_numsmob && scm_smobs[i].print
- && (scm_smobs[i].print) (exp, port, writing))
- break;
- goto punk;
+ {
+ register long i;
+ ENTER_NESTED_DATA (pstate, exp, circref);
+ i = SCM_SMOBNUM (exp);
+ if (i < scm_numsmob && scm_smobs[i].print
+ && (scm_smobs[i].print) (exp, port, pstate))
+ {
+ EXIT_NESTED_DATA (pstate);
+ break;
+ }
+ EXIT_NESTED_DATA (pstate);
+ /* Macros have their print field set to NULL. They are
+ handled at the same place as closures in order to achieve
+ non-redundancy. Placing the condition here won't slow
+ down printing of other smobs. */
+ if (SCM_TYP16 (exp) == scm_tc16_macro)
+ goto macros;
+ }
default:
- punk:scm_ipruk ("type", exp, port);
+ punk:
+ scm_ipruk ("type", exp, port);
}
}
}
+/* Print states are necessary for circular reference safe printing.
+ * They are also expensive to allocate. Therefore print states are
+ * kept in a pool so that they can be reused.
+ */
+
+/* The PORT argument can also be a print-state/port pair, which will
+ * then be used instead of allocating a new print state. This is
+ * useful for continuing a chain of print calls from Scheme. */
+
+void
+scm_prin1 (exp, port, writingp)
+ SCM exp;
+ SCM port;
+ int writingp;
+{
+ SCM handle = SCM_BOOL_F; /* Will GC protect the handle whilst unlinked */
+ SCM pstate_scm;
+ scm_print_state *pstate;
+
+ /* If PORT is a print-state/port pair, use that. Else create a new
+ print-state. */
+
+ if (SCM_NIMP (port) && SCM_PORT_WITH_PS_P (port))
+ {
+ pstate_scm = SCM_PORT_WITH_PS_PS (port);
+ port = SCM_PORT_WITH_PS_PORT (port);
+ }
+ else
+ {
+ /* First try to allocate a print state from the pool */
+ SCM_DEFER_INTS;
+ if (SCM_NNULLP (SCM_CDR (print_state_pool)))
+ {
+ handle = SCM_CDR (print_state_pool);
+ SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool));
+ }
+ SCM_ALLOW_INTS;
+ if (handle == SCM_BOOL_F)
+ handle = scm_cons (make_print_state (), SCM_EOL);
+ pstate_scm = SCM_CAR (handle);
+ }
+
+ pstate = SCM_PRINT_STATE (pstate_scm);
+ pstate->writingp = writingp;
+ scm_iprin1 (exp, port, pstate);
+
+ /* Return print state to pool if it has been created above and
+ hasn't escaped to Scheme. */
+
+ if (handle != SCM_BOOL_F && !pstate->revealed)
+ {
+ SCM_DEFER_INTS;
+ SCM_SETCDR (handle, SCM_CDR (print_state_pool));
+ SCM_SETCDR (print_state_pool, handle);
+ SCM_ALLOW_INTS;
+ }
+}
+
/* Print an integer.
*/
-#ifdef __STDC__
-void
-scm_intprint (long n, int radix, SCM port)
-#else
+
void
scm_intprint (n, radix, port)
long n;
int radix;
SCM port;
-#endif
{
char num_buf[SCM_INTBUFLEN];
- scm_gen_write (scm_regular_string, num_buf, scm_iint2str (n, radix, num_buf), port);
+ scm_lfwrite (num_buf, scm_iint2str (n, radix, num_buf), port);
}
/* Print an object of unrecognized type.
*/
-#ifdef __STDC__
-void
-scm_ipruk (char *hdr, SCM ptr, SCM port)
-#else
+
void
scm_ipruk (hdr, ptr, port)
char *hdr;
SCM ptr;
SCM port;
-#endif
{
- scm_gen_puts (scm_regular_string, "#<unknown-", port);
- scm_gen_puts (scm_regular_string, hdr, port);
+ scm_puts ("#<unknown-", port);
+ scm_puts (hdr, port);
if (SCM_CELLP (ptr))
{
- scm_gen_puts (scm_regular_string, " (0x", port);
+ scm_puts (" (0x", port);
scm_intprint (SCM_CAR (ptr), 16, port);
- scm_gen_puts (scm_regular_string, " . 0x", port);
+ scm_puts (" . 0x", port);
scm_intprint (SCM_CDR (ptr), 16, port);
- scm_gen_puts (scm_regular_string, ") @", port);
+ scm_puts (") @", port);
}
- scm_gen_puts (scm_regular_string, " 0x", port);
+ scm_puts (" 0x", port);
scm_intprint (ptr, 16, port);
- scm_gen_putc ('>', port);
+ scm_putc ('>', port);
}
/* Print a list.
*/
-#ifdef __STDC__
-void
-scm_iprlist (char *hdr, SCM exp, char tlr, SCM port, int writing)
-#else
+
+
void
-scm_iprlist (hdr, exp, tlr, port, writing)
+scm_iprlist (hdr, exp, tlr, port, pstate)
char *hdr;
SCM exp;
- char tlr;
+ int tlr;
SCM port;
- int writing;
-#endif
+ scm_print_state *pstate;
{
- scm_gen_puts (scm_regular_string, hdr, port);
+ register SCM hare, tortoise;
+ int floor = pstate->top - 2;
+ scm_puts (hdr, port);
/* CHECK_INTS; */
- scm_iprin1 (SCM_CAR (exp), port, writing);
+ if (pstate->fancyp)
+ goto fancy_printing;
+
+ /* Run a hare and tortoise so that total time complexity will be
+ O(depth * N) instead of O(N^2). */
+ hare = SCM_CDR (exp);
+ tortoise = exp;
+ while (SCM_NIMP (hare) && SCM_ECONSP (hare))
+ {
+ if (hare == tortoise)
+ goto fancy_printing;
+ hare = SCM_CDR (hare);
+ if (SCM_IMP (hare) || SCM_NECONSP (hare))
+ break;
+ hare = SCM_CDR (hare);
+ tortoise = SCM_CDR (tortoise);
+ }
+
+ /* No cdr cycles intrinsic to this list */
+ scm_iprin1 (SCM_CAR (exp), port, pstate);
exp = SCM_CDR (exp);
for (; SCM_NIMP (exp); exp = SCM_CDR (exp))
{
+ register int i;
+
if (SCM_NECONSP (exp))
break;
- scm_gen_putc (' ', port);
+ for (i = floor; i >= 0; --i)
+ if (pstate->ref_stack[i] == exp)
+ goto circref;
+ PUSH_REF (pstate, exp);
+ scm_putc (' ', port);
/* CHECK_INTS; */
- scm_iprin1 (SCM_CAR (exp), port, writing);
+ scm_iprin1 (SCM_CAR (exp), port, pstate);
}
if (SCM_NNULLP (exp))
{
- scm_gen_puts (scm_regular_string, " . ", port);
- scm_iprin1 (exp, port, writing);
+ scm_puts (" . ", port);
+ scm_iprin1 (exp, port, pstate);
}
- scm_gen_putc (tlr, port);
+
+end:
+ scm_putc (tlr, port);
+ pstate->top = floor + 2;
+ return;
+
+fancy_printing:
+ {
+ int n = pstate->length;
+
+ scm_iprin1 (SCM_CAR (exp), port, pstate);
+ exp = SCM_CDR (exp); --n;
+ for (; SCM_NIMP (exp); exp = SCM_CDR (exp))
+ {
+ register unsigned long i;
+
+ if (SCM_NECONSP (exp))
+ break;
+ for (i = 0; i < pstate->top; ++i)
+ if (pstate->ref_stack[i] == exp)
+ goto fancy_circref;
+ if (pstate->fancyp)
+ {
+ if (n == 0)
+ {
+ scm_puts (" ...", port);
+ goto skip_tail;
+ }
+ else
+ --n;
+ }
+ PUSH_REF(pstate, exp);
+ ++pstate->list_offset;
+ scm_putc (' ', port);
+ /* CHECK_INTS; */
+ scm_iprin1 (SCM_CAR (exp), port, pstate);
+ }
+ }
+ if (SCM_NNULLP (exp))
+ {
+ scm_puts (" . ", port);
+ scm_iprin1 (exp, port, pstate);
+ }
+skip_tail:
+ pstate->list_offset -= pstate->top - floor - 2;
+ goto end;
+
+fancy_circref:
+ pstate->list_offset -= pstate->top - floor - 2;
+
+circref:
+ scm_puts (" . ", port);
+ print_circref (port, pstate, exp);
+ goto end;
}
\f
-SCM_PROC(s_write, "write", 1, 1, 0, scm_write);
-#ifdef __STDC__
-SCM
-scm_write (SCM obj, SCM port)
-#else
+int
+scm_valid_oport_value_p (SCM val)
+{
+ return (SCM_NIMP (val)
+ && (SCM_OPOUTPORTP (val)
+ || (SCM_PORT_WITH_PS_P (val)
+ && SCM_OPOUTPORTP (SCM_PORT_WITH_PS_PORT (val)))));
+}
+
+/* SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); */
+
SCM
scm_write (obj, port)
SCM obj;
SCM port;
-#endif
{
if (SCM_UNBNDP (port))
port = scm_cur_outp;
- else
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_write);
- scm_iprin1 (obj, port, 1);
+
+ SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write);
+
+ scm_prin1 (obj, port, 1);
#ifdef HAVE_PIPE
# ifdef EPIPE
if (EPIPE == errno)
}
-SCM_PROC(s_display, "display", 1, 1, 0, scm_display);
-#ifdef __STDC__
-SCM
-scm_display (SCM obj, SCM port)
-#else
+/* SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); */
+
SCM
scm_display (obj, port)
SCM obj;
SCM port;
-#endif
{
if (SCM_UNBNDP (port))
port = scm_cur_outp;
- else
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_display);
- scm_iprin1 (obj, port, 0);
+
+ SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_display);
+
+ scm_prin1 (obj, port, 0);
#ifdef HAVE_PIPE
# ifdef EPIPE
if (EPIPE == errno)
}
SCM_PROC(s_newline, "newline", 0, 1, 0, scm_newline);
-#ifdef __STDC__
-SCM
-scm_newline(SCM port)
-#else
+
SCM
scm_newline (port)
SCM port;
-#endif
{
if (SCM_UNBNDP (port))
- port = scm_cur_outp;
- else
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, s_newline);
- scm_gen_putc ('\n', port);
-#ifdef HAVE_PIPE
-# ifdef EPIPE
- if (EPIPE == errno)
- scm_close_port (port);
- else
-# endif
-#endif
- if (port == scm_cur_outp)
- scm_fflush (port);
+ port = scm_cur_outp;
+
+ SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG1, s_newline);
+
+ scm_putc ('\n', SCM_COERCE_OUTPORT (port));
return SCM_UNSPECIFIED;
}
SCM_PROC(s_write_char, "write-char", 1, 1, 0, scm_write_char);
-#ifdef __STDC__
-SCM
-scm_write_char (SCM chr, SCM port)
-#else
+
SCM
scm_write_char (chr, port)
SCM chr;
SCM port;
-#endif
{
if (SCM_UNBNDP (port))
- port = scm_cur_outp;
- else
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_write_char);
+ port = scm_cur_outp;
+
+ SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write_char);
+
SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG1, s_write_char);
- scm_gen_putc ((int) SCM_ICHR (chr), port);
+ scm_putc ((int) SCM_ICHR (chr), SCM_COERCE_OUTPORT (port));
#ifdef HAVE_PIPE
# ifdef EPIPE
if (EPIPE == errno)
return SCM_UNSPECIFIED;
}
+\f
+
+/* Call back to Scheme code to do the printing of special objects
+ * (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a smob
+ * containing PORT and PSTATE. This object can be used as the port for
+ * display/write etc to continue the current print chain. The REVEALED
+ * field of PSTATE is set to true to indicate that the print state has
+ * escaped to Scheme and thus has to be freed by the GC.
+ */
+
+long scm_tc16_port_with_ps;
+
+/* Print exactly as the port itself would */
+
+static int
+print_port_with_ps (SCM obj, SCM port, scm_print_state *pstate)
+{
+ obj = SCM_PORT_WITH_PS_PORT (obj);
+ return scm_ptobs[SCM_PTOBNUM (obj)].print (obj, port, pstate);
+}
+
+SCM
+scm_printer_apply (proc, exp, port, pstate)
+ SCM proc, exp, port;
+ scm_print_state *pstate;
+{
+ SCM pwps;
+ SCM pair = scm_cons (port, pstate->handle);
+ SCM_NEWSMOB (pwps, scm_tc16_port_with_ps, pair);
+ pstate->revealed = 1;
+ return scm_apply (proc, exp, scm_cons (pwps, scm_listofnull));
+}
+
+SCM_PROC (s_port_with_print_state, "port-with-print-state", 2, 0, 0, scm_port_with_print_state);
+
+SCM
+scm_port_with_print_state (SCM port, SCM pstate)
+{
+ SCM pwps;
+ SCM_ASSERT (scm_valid_oport_value_p (port),
+ port, SCM_ARG1, s_port_with_print_state);
+ SCM_ASSERT (SCM_NIMP (pstate) && SCM_PRINT_STATE_P (pstate),
+ pstate, SCM_ARG2, s_port_with_print_state);
+ port = SCM_COERCE_OUTPORT (port);
+ SCM_NEWSMOB (pwps, scm_tc16_port_with_ps, scm_cons (port, pstate));
+ return pwps;
+}
+
+SCM_PROC (s_get_print_state, "get-print-state", 1, 0, 0, scm_get_print_state);
+
+SCM
+scm_get_print_state (SCM port)
+{
+ if (SCM_NIMP (port))
+ {
+ if (SCM_PORT_WITH_PS_P (port))
+ return SCM_PORT_WITH_PS_PS (port);
+ if (SCM_OUTPORTP (port))
+ return SCM_BOOL_F;
+ }
+ return scm_wta (port, (char *) SCM_ARG1, s_get_print_state);
+}
\f
-#ifdef __STDC__
-void
-scm_init_print (void)
-#else
void
scm_init_print ()
-#endif
{
-#ifdef DEBUG_EXTENSIONS
+ SCM vtable, layout, type;
+
scm_init_opts (scm_print_options, scm_print_opts, SCM_N_PRINT_OPTIONS);
-#endif
+ vtable = scm_make_vtable_vtable (scm_make_struct_layout (scm_nullstr),
+ SCM_INUM0,
+ SCM_EOL);
+ layout = scm_make_struct_layout (scm_makfrom0str (SCM_PRINT_STATE_LAYOUT));
+ type = scm_make_struct (vtable, SCM_INUM0, SCM_LIST1 (layout));
+ scm_set_struct_vtable_name_x (type, SCM_CAR (scm_intern0 ("print-state")));
+ print_state_pool = scm_permanent_object (scm_cons (type, SCM_EOL));
+
+ scm_print_state_vtable = type;
+
+ /* Don't want to bind a wrapper class in GOOPS, so pass 0 as arg1. */
+ scm_tc16_port_with_ps = scm_make_smob_type (0, 0);
+ scm_set_smob_mark (scm_tc16_port_with_ps, scm_markcdr);
+ scm_set_smob_print (scm_tc16_port_with_ps, print_port_with_ps);
+
#include "print.x"
}
-
HCoop / bpt / guile.git / blobdiff