-/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
- *
+/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004,
+ * 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+ *
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
*/
#define _LARGEFILE64_SOURCE /* ask for stat64 etc */
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <fcntl.h> /* for chsize on mingw */
+#include <assert.h>
+#include <iconv.h>
+#include <uniconv.h>
+#include <unistr.h>
+#include <striconveh.h>
#include <assert.h>
#include "libguile/async.h"
#include "libguile/eval.h"
#include "libguile/fports.h" /* direct access for seek and truncate */
-#include "libguile/objects.h"
#include "libguile/goops.h"
#include "libguile/smob.h"
#include "libguile/chars.h"
#include "libguile/dynwind.h"
#include "libguile/keywords.h"
+#include "libguile/hashtab.h"
#include "libguile/root.h"
#include "libguile/strings.h"
#include "libguile/mallocs.h"
#include "libguile/validate.h"
#include "libguile/ports.h"
#include "libguile/vectors.h"
+#include "libguile/weaks.h"
#include "libguile/fluids.h"
+#include "libguile/eq.h"
#ifdef HAVE_STRING_H
#include <string.h>
gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which
might be possibilities if we've got other systems without ftruncate. */
-#if HAVE_CHSIZE && ! HAVE_FTRUNCATE
+#if defined HAVE_CHSIZE && ! defined HAVE_FTRUNCATE
#define ftruncate(fd, size) chsize (fd, size)
#undef HAVE_FTRUNCATE
#define HAVE_FTRUNCATE 1
/* scm_ptobs scm_numptob
- * implement a dynamicly resized array of ptob records.
+ * implement a dynamically resized array of ptob records.
* Indexes into this table are used when generating type
* tags for smobjects (if you know a tag you can get an index and conversely).
*/
-scm_t_ptob_descriptor *scm_ptobs;
-long scm_numptob;
+scm_t_ptob_descriptor *scm_ptobs = NULL;
+long scm_numptob = 0;
/* GC marker for a port with stream of SCM type. */
SCM
{
}
-static size_t
-scm_port_free0 (SCM port)
-{
- return 0;
-}
-
scm_t_bits
scm_make_port_type (char *name,
int (*fill_input) (SCM port),
void (*write) (SCM port, const void *data, size_t size))
{
char *tmp;
- if (255 <= scm_numptob)
+ if (SCM_I_MAX_PORT_TYPE_COUNT - 1 <= scm_numptob)
goto ptoberr;
SCM_CRITICAL_SECTION_START;
tmp = (char *) scm_gc_realloc ((char *) scm_ptobs,
scm_ptobs[scm_numptob].name = name;
scm_ptobs[scm_numptob].mark = 0;
- scm_ptobs[scm_numptob].free = scm_port_free0;
+ scm_ptobs[scm_numptob].free = NULL;
scm_ptobs[scm_numptob].print = scm_port_print;
scm_ptobs[scm_numptob].equalp = 0;
scm_ptobs[scm_numptob].close = 0;
scm_memory_error ("scm_make_port_type");
}
/* Make a class object if Goops is present */
- if (scm_port_class)
+ if (SCM_UNPACK (scm_port_class[0]) != 0)
scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1));
return scm_tc7_port + (scm_numptob - 1) * 256;
}
}
void
-scm_set_port_seek (scm_t_bits tc, off_t (*seek) (SCM port,
- off_t OFFSET,
- int WHENCE))
+scm_set_port_seek (scm_t_bits tc,
+ scm_t_off (*seek) (SCM, scm_t_off, int))
{
scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek;
}
void
-scm_set_port_truncate (scm_t_bits tc, void (*truncate) (SCM port, off_t length))
+scm_set_port_truncate (scm_t_bits tc, void (*truncate) (SCM, scm_t_off))
{
scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate;
}
if (SCM_UNBNDP (port))
port = scm_current_input_port ();
- else
- SCM_VALIDATE_OPINPORT (1, port);
+ /* It's possible to close the current input port, so validate even in
+ this case. */
+ SCM_VALIDATE_OPINPORT (1, port);
pt = SCM_PTAB_ENTRY (port);
if (pt->read_buf == pt->putback_buf)
count += pt->saved_read_end - pt->saved_read_pos;
- result = scm_i_make_string (count, &data);
- scm_take_from_input_buffers (port, data, count);
+ if (count)
+ {
+ result = scm_i_make_string (count, &data);
+ scm_take_from_input_buffers (port, data, count);
+ }
+ else
+ result = scm_nullstr;
+
return result;
}
#undef FUNC_NAME
\f
/* Standard ports --- current input, output, error, and more(!). */
-static SCM cur_inport_fluid;
-static SCM cur_outport_fluid;
-static SCM cur_errport_fluid;
-static SCM cur_loadport_fluid;
+static SCM cur_inport_fluid = 0;
+static SCM cur_outport_fluid = 0;
+static SCM cur_errport_fluid = 0;
+static SCM cur_loadport_fluid = 0;
SCM_DEFINE (scm_current_input_port, "current-input-port", 0, 0, 0,
(),
"returns the @dfn{standard input} in Unix and C terminology.")
#define FUNC_NAME s_scm_current_input_port
{
- return scm_fluid_ref (cur_inport_fluid);
+ if (cur_inport_fluid)
+ return scm_fluid_ref (cur_inport_fluid);
+ else
+ return SCM_BOOL_F;
}
#undef FUNC_NAME
"Unix and C terminology.")
#define FUNC_NAME s_scm_current_output_port
{
- return scm_fluid_ref (cur_outport_fluid);
+ if (cur_outport_fluid)
+ return scm_fluid_ref (cur_outport_fluid);
+ else
+ return SCM_BOOL_F;
}
#undef FUNC_NAME
"@dfn{standard error} in Unix and C terminology).")
#define FUNC_NAME s_scm_current_error_port
{
- return scm_fluid_ref (cur_errport_fluid);
+ if (cur_errport_fluid)
+ return scm_fluid_ref (cur_errport_fluid);
+ else
+ return SCM_BOOL_F;
}
#undef FUNC_NAME
\f
/* The port table --- an array of pointers to ports. */
-scm_t_port **scm_i_port_table = NULL;
-
-long scm_i_port_table_size = 0; /* Number of ports in SCM_I_PORT_TABLE. */
-long scm_i_port_table_room = 20; /* Actual size of the array. */
+/*
+ We need a global registry of ports to flush them all at exit, and to
+ get all the ports matching a file descriptor.
+ */
+SCM scm_i_port_weak_hash;
scm_i_pthread_mutex_t scm_i_port_table_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER;
static void finalize_port (GC_PTR, GC_PTR);
-/* Register a finalizer for PORT, if needed by its port type. */
+/* Register a finalizer for PORT. */
static SCM_C_INLINE_KEYWORD void
register_finalizer_for_port (SCM port)
{
long port_type;
+ GC_finalization_proc prev_finalizer;
+ GC_PTR prev_finalization_data;
port_type = SCM_TC2PTOBNUM (SCM_CELL_TYPE (port));
- if (scm_ptobs[port_type].free)
- {
- GC_finalization_proc prev_finalizer;
- GC_PTR prev_finalization_data;
- GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (port), finalize_port, 0,
- &prev_finalizer,
- &prev_finalization_data);
- }
+ /* Register a finalizer for PORT so that its iconv CDs get freed and
+ optionally its type's `free' function gets called. */
+ GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (port), finalize_port, 0,
+ &prev_finalizer,
+ &prev_finalization_data);
}
/* Finalize the object (a port) pointed to by PTR. */
register_finalizer_for_port (port);
else
{
+ scm_t_port *entry;
+
port_type = SCM_TC2PTOBNUM (SCM_CELL_TYPE (port));
if (port_type >= scm_numptob)
abort ();
is for explicit `close-port' by user. */
scm_ptobs[port_type].free (port);
+ entry = SCM_PTAB_ENTRY (port);
+
+ if (entry->input_cd != (iconv_t) -1)
+ iconv_close (entry->input_cd);
+ if (entry->output_cd != (iconv_t) -1)
+ iconv_close (entry->output_cd);
+
SCM_SETSTREAM (port, 0);
SCM_CLR_PORT_OPEN_FLAG (port);
- scm_remove_from_port_table (port);
scm_gc_ports_collected++;
}
SCM z = scm_cons (SCM_EOL, SCM_EOL);
scm_t_port *entry = (scm_t_port *) scm_gc_calloc (sizeof (scm_t_port), "port");
- if (scm_i_port_table_size == scm_i_port_table_room)
- {
- /* initial malloc is in gc.c. this doesn't use scm_gc_malloc etc.,
- since it can never be freed during gc. */
- /* XXX (Ludo): Why not do it actually? */
- size_t new_size = scm_i_port_table_room * 2;
- /* XXX (Ludo): Can we use `GC_REALLOC' with
- `GC_MALLOC_ATOMIC'-allocated data? */
- void *newt = scm_gc_realloc ((char *) scm_i_port_table,
- scm_i_port_table_room * sizeof (scm_t_port *),
- new_size * sizeof (scm_t_port *),
- "port-table");
- scm_i_port_table = (scm_t_port **) newt;
- scm_i_port_table_room = new_size;
- }
-
- entry->entry = scm_i_port_table_size;
+ const char *enc;
entry->file_name = SCM_BOOL_F;
entry->rw_active = SCM_PORT_NEITHER;
+ entry->port = z;
+ /* Initialize this port with the thread's current default
+ encoding. */
+ if ((enc = scm_i_get_port_encoding (SCM_BOOL_F)) == NULL)
+ entry->encoding = NULL;
+ else
+ entry->encoding = scm_gc_strdup (enc, "port");
- scm_i_port_table[scm_i_port_table_size] = entry;
- scm_i_port_table_size++;
+ /* The conversion descriptors will be opened lazily. */
+ entry->input_cd = (iconv_t) -1;
+ entry->output_cd = (iconv_t) -1;
- entry->port = z;
- SCM_SET_CELL_TYPE(z, tag);
- SCM_SETPTAB_ENTRY(z, entry);
+ entry->ilseq_handler = scm_i_get_conversion_strategy (SCM_BOOL_F);
+
+ SCM_SET_CELL_TYPE (z, tag);
+ SCM_SETPTAB_ENTRY (z, entry);
+
+ scm_hashq_set_x (scm_i_port_weak_hash, z, SCM_BOOL_F);
/* For each new port, register a finalizer so that it port type's free
function can be invoked eventually. */
scm_t_port * pt = SCM_PTAB_ENTRY(z);
pt->port = port;
- SCM_SETCAR(z, SCM_EOL);
- SCM_SETCDR(z, SCM_EOL);
+ SCM_SETCAR (z, SCM_EOL);
+ SCM_SETCDR (z, SCM_EOL);
SCM_SETPTAB_ENTRY (port, pt);
return pt;
}
/* Remove a port from the table and destroy it. */
/* This function is not and should not be thread safe. */
-
void
-scm_remove_from_port_table (SCM port)
-#define FUNC_NAME "scm_remove_from_port_table"
+scm_i_remove_port (SCM port)
+#define FUNC_NAME "scm_remove_port"
{
scm_t_port *p = SCM_PTAB_ENTRY (port);
- long i = p->entry;
-
- if (i >= scm_i_port_table_size)
- SCM_MISC_ERROR ("Port not in table: ~S", scm_list_1 (port));
- if (p->putback_buf)
- scm_gc_free (p->putback_buf, p->putback_buf_size, "putback buffer");
- scm_gc_free (p, sizeof (scm_t_port), "port");
- /* Since we have just freed slot i we can shrink the table by moving
- the last entry to that slot... */
- if (i < scm_i_port_table_size - 1)
- {
- scm_i_port_table[i] = scm_i_port_table[scm_i_port_table_size - 1];
- scm_i_port_table[i]->entry = i;
- }
+
+ scm_port_non_buffer (p);
+
+ p->putback_buf = NULL;
+ p->putback_buf_size = 0;
+
SCM_SETPTAB_ENTRY (port, 0);
- scm_i_port_table_size--;
+ scm_hashq_remove_x (scm_i_port_weak_hash, port);
}
#undef FUNC_NAME
-#ifdef GUILE_DEBUG
/* Functions for debugging. */
-
+#ifdef GUILE_DEBUG
SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0,
(),
"Return the number of ports in the port table. @code{pt-size}\n"
"is only included in @code{--enable-guile-debug} builds.")
#define FUNC_NAME s_scm_pt_size
{
- return scm_from_int (scm_i_port_table_size);
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_pt_member, "pt-member", 1, 0, 0,
- (SCM index),
- "Return the port at @var{index} in the port table.\n"
- "@code{pt-member} is only included in\n"
- "@code{--enable-guile-debug} builds.")
-#define FUNC_NAME s_scm_pt_member
-{
- size_t i = scm_to_size_t (index);
- if (i >= scm_i_port_table_size)
- return SCM_BOOL_F;
- else
- return scm_i_port_table[i]->port;
+ return scm_from_int (SCM_HASHTABLE_N_ITEMS (scm_i_port_weak_hash));
}
#undef FUNC_NAME
#endif
*/
static long
-scm_i_mode_bits_n (const char *modes, size_t n)
+scm_i_mode_bits_n (SCM modes)
{
return (SCM_OPN
- | (memchr (modes, 'r', n) || memchr (modes, '+', n) ? SCM_RDNG : 0)
- | ( memchr (modes, 'w', n)
- || memchr (modes, 'a', n)
- || memchr (modes, '+', n) ? SCM_WRTNG : 0)
- | (memchr (modes, '0', n) ? SCM_BUF0 : 0)
- | (memchr (modes, 'l', n) ? SCM_BUFLINE : 0));
+ | (scm_i_string_contains_char (modes, 'r')
+ || scm_i_string_contains_char (modes, '+') ? SCM_RDNG : 0)
+ | (scm_i_string_contains_char (modes, 'w')
+ || scm_i_string_contains_char (modes, 'a')
+ || scm_i_string_contains_char (modes, '+') ? SCM_WRTNG : 0)
+ | (scm_i_string_contains_char (modes, '0') ? SCM_BUF0 : 0)
+ | (scm_i_string_contains_char (modes, 'l') ? SCM_BUFLINE : 0));
}
long
scm_mode_bits (char *modes)
{
- return scm_i_mode_bits_n (modes, strlen (modes));
+ return scm_i_mode_bits (scm_from_locale_string (modes));
}
long
if (!scm_is_string (modes))
scm_wrong_type_arg_msg (NULL, 0, modes, "string");
- bits = scm_i_mode_bits_n (scm_i_string_chars (modes),
- scm_i_string_length (modes));
+ bits = scm_i_mode_bits_n (modes);
scm_remember_upto_here_1 (modes);
return bits;
}
else
rv = 0;
scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
- scm_remove_from_port_table (port);
+ scm_i_remove_port (port);
scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
SCM_CLR_PORT_OPEN_FLAG (port);
return scm_from_bool (rv >= 0);
}
#undef FUNC_NAME
+static SCM
+scm_i_collect_keys_in_vector (void *closure, SCM key, SCM value, SCM result)
+{
+ int *i = (int*) closure;
+ scm_c_vector_set_x (result, *i, key);
+ (*i)++;
+
+ return result;
+}
+
void
scm_c_port_for_each (void (*proc)(void *data, SCM p), void *data)
{
- long i;
+ int i = 0;
size_t n;
SCM ports;
collect the ports into a vector. -mvo */
scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
- n = scm_i_port_table_size;
+ n = SCM_HASHTABLE_N_ITEMS (scm_i_port_weak_hash);
scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
-
ports = scm_c_make_vector (n, SCM_BOOL_F);
- scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
- if (n > scm_i_port_table_size)
- n = scm_i_port_table_size;
- for (i = 0; i < n; i++)
- SCM_SIMPLE_VECTOR_SET (ports, i, scm_i_port_table[i]->port);
+ scm_i_pthread_mutex_lock (&scm_i_port_table_mutex);
+ ports = scm_internal_hash_fold (scm_i_collect_keys_in_vector, &i,
+ ports, scm_i_port_weak_hash);
scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
- for (i = 0; i < n; i++)
- proc (data, SCM_SIMPLE_VECTOR_REF (ports, i));
+ for (i = 0; i < n; i++) {
+ SCM p = SCM_SIMPLE_VECTOR_REF (ports, i);
+ if (SCM_PORTP (p))
+ proc (data, p);
+ }
scm_remember_upto_here_1 (ports);
}
}
#undef FUNC_NAME
+
+static void
+flush_output_port (void *closure, SCM port)
+{
+ if (SCM_OPOUTPORTP (port))
+ scm_flush (port);
+}
+
SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0,
(),
"Equivalent to calling @code{force-output} on\n"
"all open output ports. The return value is unspecified.")
#define FUNC_NAME s_scm_flush_all_ports
{
- size_t i;
-
- scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
- for (i = 0; i < scm_i_port_table_size; i++)
- {
- if (SCM_OPOUTPORTP (scm_i_port_table[i]->port))
- scm_flush (scm_i_port_table[i]->port);
- }
- scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
+ scm_c_port_for_each (&flush_output_port, NULL);
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
"characters are available, the end-of-file object is returned.")
#define FUNC_NAME s_scm_read_char
{
- int c;
+ scm_t_wchar c;
if (SCM_UNBNDP (port))
port = scm_current_input_port ();
SCM_VALIDATE_OPINPORT (1, port);
}
#undef FUNC_NAME
-/* this should only be called when the read buffer is empty. it
- tries to refill the read buffer. it returns the first char from
- the port, which is either EOF or *(pt->read_pos). */
-int
-scm_fill_input (SCM port)
+/* Update the line and column number of PORT after consumption of C. */
+static inline void
+update_port_lf (scm_t_wchar c, SCM port)
{
- scm_t_port *pt = SCM_PTAB_ENTRY (port);
+ switch (c)
+ {
+ case '\a':
+ break;
+ case '\b':
+ SCM_DECCOL (port);
+ break;
+ case '\n':
+ SCM_INCLINE (port);
+ break;
+ case '\r':
+ SCM_ZEROCOL (port);
+ break;
+ case '\t':
+ SCM_TABCOL (port);
+ break;
+ default:
+ SCM_INCCOL (port);
+ break;
+ }
+}
- if (pt->read_buf == pt->putback_buf)
+#define SCM_MBCHAR_BUF_SIZE (4)
+
+/* Convert the SIZE-byte UTF-8 sequence in UTF8_BUF to a codepoint.
+ UTF8_BUF is assumed to contain a valid UTF-8 sequence. */
+static scm_t_wchar
+utf8_to_codepoint (const scm_t_uint8 *utf8_buf, size_t size)
+{
+ scm_t_wchar codepoint;
+
+ if (utf8_buf[0] <= 0x7f)
{
- /* finished reading put-back chars. */
- pt->read_buf = pt->saved_read_buf;
- pt->read_pos = pt->saved_read_pos;
- pt->read_end = pt->saved_read_end;
- pt->read_buf_size = pt->saved_read_buf_size;
- if (pt->read_pos < pt->read_end)
- return *(pt->read_pos);
+ assert (size == 1);
+ codepoint = utf8_buf[0];
}
- return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port);
+ else if ((utf8_buf[0] & 0xe0) == 0xc0)
+ {
+ assert (size == 2);
+ codepoint = ((scm_t_wchar) utf8_buf[0] & 0x1f) << 6UL
+ | (utf8_buf[1] & 0x3f);
+ }
+ else if ((utf8_buf[0] & 0xf0) == 0xe0)
+ {
+ assert (size == 3);
+ codepoint = ((scm_t_wchar) utf8_buf[0] & 0x0f) << 12UL
+ | ((scm_t_wchar) utf8_buf[1] & 0x3f) << 6UL
+ | (utf8_buf[2] & 0x3f);
+ }
+ else
+ {
+ assert (size == 4);
+ codepoint = ((scm_t_wchar) utf8_buf[0] & 0x07) << 18UL
+ | ((scm_t_wchar) utf8_buf[1] & 0x3f) << 12UL
+ | ((scm_t_wchar) utf8_buf[2] & 0x3f) << 6UL
+ | (utf8_buf[3] & 0x3f);
+ }
+
+ return codepoint;
}
-int
-scm_getc (SCM port)
+/* Read a codepoint from PORT and return it. Fill BUF with the byte
+ representation of the codepoint in PORT's encoding, and set *LEN to
+ the length in bytes of that representation. Raise an error on
+ failure. */
+static scm_t_wchar
+get_codepoint (SCM port, char buf[SCM_MBCHAR_BUF_SIZE], size_t *len)
{
- int c;
+ int err, byte_read;
+ size_t bytes_consumed, output_size;
+ scm_t_wchar codepoint;
+ char *output;
+ scm_t_uint8 utf8_buf[SCM_MBCHAR_BUF_SIZE];
scm_t_port *pt = SCM_PTAB_ENTRY (port);
- if (pt->rw_active == SCM_PORT_WRITE)
- /* may be marginally faster than calling scm_flush. */
- scm_ptobs[SCM_PTOBNUM (port)].flush (port);
-
- if (pt->rw_random)
- pt->rw_active = SCM_PORT_READ;
+ if (SCM_UNLIKELY (pt->input_cd == (iconv_t) -1))
+ /* Initialize the conversion descriptors. */
+ scm_i_set_port_encoding_x (port, pt->encoding);
- if (pt->read_pos >= pt->read_end)
+ for (output_size = 0, output = (char *) utf8_buf,
+ bytes_consumed = 0, err = 0;
+ err == 0 && output_size == 0
+ && (bytes_consumed == 0 || byte_read != EOF);
+ bytes_consumed++)
{
- if (scm_fill_input (port) == EOF)
- return EOF;
- }
+ char *input;
+ size_t input_left, output_left, done;
- c = *(pt->read_pos++);
+ byte_read = scm_get_byte_or_eof (port);
+ if (byte_read == EOF)
+ {
+ if (bytes_consumed == 0)
+ return (scm_t_wchar) EOF;
+ else
+ continue;
+ }
- switch (c)
- {
- case '\a':
- break;
- case '\b':
- SCM_DECCOL (port);
- break;
- case '\n':
- SCM_INCLINE (port);
- break;
- case '\r':
- SCM_ZEROCOL (port);
- break;
- case '\t':
- SCM_TABCOL (port);
- break;
- default:
- SCM_INCCOL (port);
- break;
+ buf[bytes_consumed] = byte_read;
+
+ input = buf;
+ input_left = bytes_consumed + 1;
+ output_left = sizeof (utf8_buf);
+
+ done = iconv (pt->input_cd, &input, &input_left,
+ &output, &output_left);
+ if (done == (size_t) -1)
+ {
+ err = errno;
+ if (err == EINVAL)
+ /* Missing input: keep trying. */
+ err = 0;
+ }
+ else
+ output_size = sizeof (utf8_buf) - output_left;
}
-
- return c;
+
+ if (err != 0)
+ goto failure;
+
+ /* Convert the UTF8_BUF sequence to a Unicode code point. */
+ codepoint = utf8_to_codepoint (utf8_buf, output_size);
+ update_port_lf (codepoint, port);
+
+ *len = bytes_consumed;
+
+ return codepoint;
+
+ failure:
+ {
+ char *err_buf;
+ SCM err_str = scm_i_make_string (bytes_consumed, &err_buf);
+ memcpy (err_buf, buf, bytes_consumed);
+
+ if (err == EILSEQ)
+ scm_misc_error (NULL, "input encoding error for ~s: ~s",
+ scm_list_2 (scm_from_locale_string (scm_i_get_port_encoding (port)),
+ err_str));
+ else
+ scm_misc_error (NULL, "input encoding error (invalid) for ~s: ~s\n",
+ scm_list_2 (scm_from_locale_string (scm_i_get_port_encoding (port)),
+ err_str));
+ }
+
+ /* Never gets here. */
+ return 0;
}
-void
-scm_putc (char c, SCM port)
+/* Read a codepoint from PORT and return it. */
+scm_t_wchar
+scm_getc (SCM port)
{
- SCM_ASSERT_TYPE (SCM_OPOUTPORTP (port), port, 0, NULL, "output port");
- scm_lfwrite (&c, 1, port);
+ size_t len;
+ char buf[SCM_MBCHAR_BUF_SIZE];
+
+ return get_codepoint (port, buf, &len);
}
-void
-scm_puts (const char *s, SCM port)
+/* this should only be called when the read buffer is empty. it
+ tries to refill the read buffer. it returns the first char from
+ the port, which is either EOF or *(pt->read_pos). */
+int
+scm_fill_input (SCM port)
{
- SCM_ASSERT_TYPE (SCM_OPOUTPORTP (port), port, 0, NULL, "output port");
- scm_lfwrite (s, strlen (s), port);
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+
+ assert (pt->read_pos == pt->read_end);
+
+ if (pt->read_buf == pt->putback_buf)
+ {
+ /* finished reading put-back chars. */
+ pt->read_buf = pt->saved_read_buf;
+ pt->read_pos = pt->saved_read_pos;
+ pt->read_end = pt->saved_read_end;
+ pt->read_buf_size = pt->saved_read_buf_size;
+ if (pt->read_pos < pt->read_end)
+ return *(pt->read_pos);
+ }
+ return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port);
}
+
/* scm_lfwrite
*
* This function differs from scm_c_write; it updates port line and
* column. */
-void
+void
scm_lfwrite (const char *ptr, size_t size, SCM port)
{
scm_t_port *pt = SCM_PTAB_ENTRY (port);
ptob->write (port, ptr, size);
- for (; size; ptr++, size--) {
- if (*ptr == '\a') {
- }
- else if (*ptr == '\b') {
- SCM_DECCOL(port);
- }
- else if (*ptr == '\n') {
- SCM_INCLINE(port);
- }
- else if (*ptr == '\r') {
- SCM_ZEROCOL(port);
- }
- else if (*ptr == '\t') {
- SCM_TABCOL(port);
- }
- else {
- SCM_INCCOL(port);
- }
- }
+ for (; size; ptr++, size--)
+ update_port_lf ((scm_t_wchar) (unsigned char) *ptr, port);
+
+ if (pt->rw_random)
+ pt->rw_active = SCM_PORT_WRITE;
+}
+
+/* Write STR to PORT from START inclusive to END exclusive. */
+void
+scm_lfwrite_substr (SCM str, size_t start, size_t end, SCM port)
+{
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+
+ if (pt->rw_active == SCM_PORT_READ)
+ scm_end_input (port);
+
+ if (end == (size_t) -1)
+ end = scm_i_string_length (str);
+
+ scm_display (scm_c_substring (str, start, end), port);
if (pt->rw_random)
pt->rw_active = SCM_PORT_WRITE;
*
* Warning: Doesn't update port line and column counts! */
+/* This structure, and the following swap_buffer function, are used
+ for temporarily swapping a port's own read buffer, and the buffer
+ that the caller of scm_c_read provides. */
+struct port_and_swap_buffer
+{
+ scm_t_port *pt;
+ unsigned char *buffer;
+ size_t size;
+};
+
+static void
+swap_buffer (void *data)
+{
+ struct port_and_swap_buffer *psb = (struct port_and_swap_buffer *) data;
+ unsigned char *old_buf = psb->pt->read_buf;
+ size_t old_size = psb->pt->read_buf_size;
+
+ /* Make the port use (buffer, size) from the struct. */
+ psb->pt->read_pos = psb->pt->read_buf = psb->pt->read_end = psb->buffer;
+ psb->pt->read_buf_size = psb->size;
+
+ /* Save the port's old (buffer, size) in the struct. */
+ psb->buffer = old_buf;
+ psb->size = old_size;
+}
+
size_t
scm_c_read (SCM port, void *buffer, size_t size)
+#define FUNC_NAME "scm_c_read"
{
- scm_t_port *pt = SCM_PTAB_ENTRY (port);
+ scm_t_port *pt;
size_t n_read = 0, n_available;
+ struct port_and_swap_buffer psb;
+ SCM_VALIDATE_OPINPORT (1, port);
+
+ pt = SCM_PTAB_ENTRY (port);
if (pt->rw_active == SCM_PORT_WRITE)
scm_ptobs[SCM_PTOBNUM (port)].flush (port);
if (pt->rw_random)
pt->rw_active = SCM_PORT_READ;
- if (SCM_READ_BUFFER_EMPTY_P (pt))
- {
- if (scm_fill_input (port) == EOF)
- return 0;
- }
-
- n_available = pt->read_end - pt->read_pos;
-
- while (n_available < size)
+ /* Take bytes first from the port's read buffer. */
+ if (pt->read_pos < pt->read_end)
{
+ n_available = min (size, pt->read_end - pt->read_pos);
memcpy (buffer, pt->read_pos, n_available);
buffer = (char *) buffer + n_available;
pt->read_pos += n_available;
n_read += n_available;
-
- if (SCM_READ_BUFFER_EMPTY_P (pt))
- {
- if (scm_fill_input (port) == EOF)
- return n_read;
- }
-
size -= n_available;
- n_available = pt->read_end - pt->read_pos;
}
- memcpy (buffer, pt->read_pos, size);
- pt->read_pos += size;
+ /* Avoid the scm_dynwind_* costs if we now have enough data. */
+ if (size == 0)
+ return n_read;
+
+ /* Now we will call scm_fill_input repeatedly until we have read the
+ requested number of bytes. (Note that a single scm_fill_input
+ call does not guarantee to fill the whole of the port's read
+ buffer.) */
+ if (pt->read_buf_size <= 1 && pt->encoding == NULL)
+ {
+ /* The port that we are reading from is unbuffered - i.e. does
+ not have its own persistent buffer - but we have a buffer,
+ provided by our caller, that is the right size for the data
+ that is wanted. For the following scm_fill_input calls,
+ therefore, we use the buffer in hand as the port's read
+ buffer.
+
+ We need to make sure that the port's normal (1 byte) buffer
+ is reinstated in case one of the scm_fill_input () calls
+ throws an exception; we use the scm_dynwind_* API to achieve
+ that.
+
+ A consequence of this optimization is that the fill_input
+ functions can't unget characters. That'll push data to the
+ pushback buffer instead of this psb buffer. */
+#if SCM_DEBUG == 1
+ unsigned char *pback = pt->putback_buf;
+#endif
+ psb.pt = pt;
+ psb.buffer = buffer;
+ psb.size = size;
+ scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE);
+ scm_dynwind_rewind_handler (swap_buffer, &psb, SCM_F_WIND_EXPLICITLY);
+ scm_dynwind_unwind_handler (swap_buffer, &psb, SCM_F_WIND_EXPLICITLY);
+
+ /* Call scm_fill_input until we have all the bytes that we need,
+ or we hit EOF. */
+ while (pt->read_buf_size && (scm_fill_input (port) != EOF))
+ {
+ pt->read_buf_size -= (pt->read_end - pt->read_pos);
+ pt->read_pos = pt->read_buf = pt->read_end;
+ }
+#if SCM_DEBUG == 1
+ if (pback != pt->putback_buf
+ || pt->read_buf - (unsigned char *) buffer < 0)
+ scm_misc_error (FUNC_NAME,
+ "scm_c_read must not call a fill function that pushes "
+ "back characters onto an unbuffered port", SCM_EOL);
+#endif
+ n_read += pt->read_buf - (unsigned char *) buffer;
+
+ /* Reinstate the port's normal buffer. */
+ scm_dynwind_end ();
+ }
+ else
+ {
+ /* The port has its own buffer. It is important that we use it,
+ even if it happens to be smaller than our caller's buffer, so
+ that a custom port implementation's entry points (in
+ particular, fill_input) can rely on the buffer always being
+ the same as they first set up. */
+ while (size && (scm_fill_input (port) != EOF))
+ {
+ n_available = min (size, pt->read_end - pt->read_pos);
+ memcpy (buffer, pt->read_pos, n_available);
+ buffer = (char *) buffer + n_available;
+ pt->read_pos += n_available;
+ n_read += n_available;
+ size -= n_available;
+ }
+ }
- return n_read + size;
+ return n_read;
}
+#undef FUNC_NAME
/* scm_c_write
*
* Warning: Doesn't update port line and column counts!
*/
-void
+void
scm_c_write (SCM port, const void *ptr, size_t size)
+#define FUNC_NAME "scm_c_write"
{
- scm_t_port *pt = SCM_PTAB_ENTRY (port);
- scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)];
+ scm_t_port *pt;
+ scm_t_ptob_descriptor *ptob;
+
+ SCM_VALIDATE_OPOUTPORT (1, port);
+
+ pt = SCM_PTAB_ENTRY (port);
+ ptob = &scm_ptobs[SCM_PTOBNUM (port)];
if (pt->rw_active == SCM_PORT_READ)
scm_end_input (port);
if (pt->rw_random)
pt->rw_active = SCM_PORT_WRITE;
}
+#undef FUNC_NAME
void
scm_flush (SCM port)
{
long i = SCM_PTOBNUM (port);
- assert ((i >= 0) && (i < scm_i_port_table_size));
+ assert (i >= 0);
(scm_ptobs[i].flush) (port);
}
void
-scm_ungetc (int c, SCM port)
-#define FUNC_NAME "scm_ungetc"
+scm_unget_byte (int c, SCM port)
+#define FUNC_NAME "scm_unget_byte"
{
scm_t_port *pt = SCM_PTAB_ENTRY (port);
{
size_t new_size = pt->read_buf_size * 2;
unsigned char *tmp = (unsigned char *)
- /* XXX: Can we use `GC_REALLOC' with `GC_MALLOC_ATOMIC'-allocated
- data? (Ludo) */
scm_gc_realloc (pt->putback_buf, pt->read_buf_size, new_size,
"putback buffer");
if (pt->rw_random)
pt->rw_active = SCM_PORT_READ;
+}
+#undef FUNC_NAME
+
+void
+scm_ungetc (scm_t_wchar c, SCM port)
+#define FUNC_NAME "scm_ungetc"
+{
+ scm_t_port *pt = SCM_PTAB_ENTRY (port);
+ char *result;
+ char result_buf[10];
+ const char *encoding;
+ size_t len;
+ int i;
+
+ if (pt->encoding != NULL)
+ encoding = pt->encoding;
+ else
+ encoding = "ISO-8859-1";
+
+ len = sizeof (result_buf);
+ result = u32_conv_to_encoding (encoding,
+ (enum iconv_ilseq_handler) pt->ilseq_handler,
+ (uint32_t *) &c, 1, NULL,
+ result_buf, &len);
+
+ if (SCM_UNLIKELY (result == NULL || len == 0))
+ {
+ SCM chr;
+
+ chr = scm_integer_to_char (scm_from_uint32 (c));
+ scm_encoding_error (FUNC_NAME, errno,
+ "conversion to port encoding failed",
+ "UTF-32", encoding,
+ scm_string (scm_list_1 (chr)));
+ }
+
+ for (i = len - 1; i >= 0; i--)
+ scm_unget_byte (result[i], port);
+
+ if (SCM_UNLIKELY (result != result_buf))
+ free (result);
if (c == '\n')
{
"to @code{read-char} would have hung.")
#define FUNC_NAME s_scm_peek_char
{
- int c, column;
+ SCM result;
+ scm_t_wchar c;
+ char bytes[SCM_MBCHAR_BUF_SIZE];
+ long column, line;
+ size_t len;
+
if (SCM_UNBNDP (port))
port = scm_current_input_port ();
+ SCM_VALIDATE_OPINPORT (1, port);
+
+ column = SCM_COL (port);
+ line = SCM_LINUM (port);
+
+ c = get_codepoint (port, bytes, &len);
+ if (c == EOF)
+ result = SCM_EOF_VAL;
else
- SCM_VALIDATE_OPINPORT (1, port);
- column = SCM_COL(port);
- c = scm_getc (port);
- if (EOF == c)
- return SCM_EOF_VAL;
- scm_ungetc (c, port);
- SCM_COL(port) = column;
- return SCM_MAKE_CHAR (c);
+ {
+ long i;
+
+ result = SCM_MAKE_CHAR (c);
+
+ for (i = len - 1; i >= 0; i--)
+ scm_unget_byte (bytes[i], port);
+
+ SCM_COL (port) = column;
+ SCM_LINUM (port) = line;
+ }
+
+ return result;
}
#undef FUNC_NAME
SCM_VALIDATE_CHAR (1, cobj);
if (SCM_UNBNDP (port))
port = scm_current_input_port ();
- else
- SCM_VALIDATE_OPINPORT (2, port);
+ SCM_VALIDATE_OPINPORT (2, port);
c = SCM_CHAR (cobj);
"@var{port} is not supplied, the current-input-port is used.")
#define FUNC_NAME s_scm_unread_string
{
+ int n;
SCM_VALIDATE_STRING (1, str);
if (SCM_UNBNDP (port))
port = scm_current_input_port ();
- else
- SCM_VALIDATE_OPINPORT (2, port);
+ SCM_VALIDATE_OPINPORT (2, port);
+
+ n = scm_i_string_length (str);
- scm_ungets (scm_i_string_chars (str), scm_i_string_length (str), port);
+ while (n--)
+ scm_ungetc (scm_i_string_ref (str, n), port);
return str;
}
if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END)
SCM_OUT_OF_RANGE (3, whence);
- if (SCM_OPFPORTP (fd_port))
- {
- /* go direct to fport code to allow 64-bit offsets */
- return scm_i_fport_seek (fd_port, offset, how);
- }
- else if (SCM_OPPORTP (fd_port))
+ if (SCM_OPPORTP (fd_port))
{
scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (fd_port);
- off_t off = scm_to_off_t (offset);
- off_t rv;
+ off_t_or_off64_t off = scm_to_off_t_or_off64_t (offset);
+ off_t_or_off64_t rv;
if (!ptob->seek)
SCM_MISC_ERROR ("port is not seekable",
scm_cons (fd_port, SCM_EOL));
else
rv = ptob->seek (fd_port, off, how);
- return scm_from_off_t (rv);
+ return scm_from_off_t_or_off64_t (rv);
}
else /* file descriptor?. */
{
SCM_SYSCALL (rv = ftruncate_or_ftruncate64 (scm_to_int (object),
c_length));
}
- else if (SCM_OPOUTFPORTP (object))
- {
- /* go direct to fport code to allow 64-bit offsets */
- rv = scm_i_fport_truncate (object, length);
- }
else if (SCM_OPOUTPORTP (object))
{
- off_t c_length = scm_to_off_t (length);
+ off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length);
scm_t_port *pt = SCM_PTAB_ENTRY (object);
scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object);
}
#undef FUNC_NAME
+/* A fluid specifying the default encoding for newly created ports. If it is
+ a string, that is the encoding. If it is #f, it is in the "native"
+ (Latin-1) encoding. */
+SCM_VARIABLE (default_port_encoding_var, "%default-port-encoding");
+
+static int scm_port_encoding_init = 0;
+
+/* Return a C string representation of the current encoding. */
+const char *
+scm_i_get_port_encoding (SCM port)
+{
+ SCM encoding;
+
+ if (scm_is_false (port))
+ {
+ if (!scm_port_encoding_init)
+ return NULL;
+ else if (!scm_is_fluid (SCM_VARIABLE_REF (default_port_encoding_var)))
+ return NULL;
+ else
+ {
+ encoding = scm_fluid_ref (SCM_VARIABLE_REF (default_port_encoding_var));
+ if (!scm_is_string (encoding))
+ return NULL;
+ else
+ return scm_i_string_chars (encoding);
+ }
+ }
+ else
+ {
+ scm_t_port *pt;
+ pt = SCM_PTAB_ENTRY (port);
+ if (pt->encoding)
+ return pt->encoding;
+ else
+ return NULL;
+ }
+}
+
+/* Returns ENC if it is a recognized encoding. If it isn't, it tries
+ to find an alias of ENC that is valid. Otherwise, it returns
+ NULL. */
+static const char *
+find_valid_encoding (const char *enc)
+{
+ int isvalid = 0;
+ const char str[] = " ";
+ scm_t_uint32 result_buf;
+ scm_t_uint32 *u32;
+ size_t u32len;
+
+ u32len = sizeof (result_buf) / sizeof (scm_t_uint32);
+ u32 = u32_conv_from_encoding (enc, iconveh_error, str, 1,
+ NULL, &result_buf, &u32len);
+ isvalid = (u32 != NULL);
+
+ if (SCM_UNLIKELY (u32 != &result_buf))
+ free (u32);
+
+ if (isvalid)
+ return enc;
+
+ return NULL;
+}
+
+void
+scm_i_set_port_encoding_x (SCM port, const char *enc)
+{
+ const char *valid_enc;
+ scm_t_port *pt;
+
+ /* Null is shorthand for the native, Latin-1 encoding. */
+ if (enc == NULL)
+ valid_enc = NULL;
+ else
+ {
+ valid_enc = find_valid_encoding (enc);
+ if (valid_enc == NULL)
+ goto invalid_encoding;
+ }
+
+ if (scm_is_false (port))
+ {
+ /* Set the default encoding for future ports. */
+ if (!scm_port_encoding_init
+ || !scm_is_fluid (SCM_VARIABLE_REF (default_port_encoding_var)))
+ scm_misc_error (NULL, "tried to set port encoding fluid before it is initialized",
+ SCM_EOL);
+
+ if (valid_enc == NULL
+ || !strcmp (valid_enc, "ASCII")
+ || !strcmp (valid_enc, "ANSI_X3.4-1968")
+ || !strcmp (valid_enc, "ISO-8859-1"))
+ scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), SCM_BOOL_F);
+ else
+ scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var),
+ scm_from_locale_string (valid_enc));
+ }
+ else
+ {
+ iconv_t new_input_cd, new_output_cd;
+
+ new_input_cd = (iconv_t) -1;
+ new_output_cd = (iconv_t) -1;
+
+ /* Set the character encoding for this port. */
+ pt = SCM_PTAB_ENTRY (port);
+ if (valid_enc == NULL)
+ pt->encoding = NULL;
+ else
+ pt->encoding = scm_gc_strdup (valid_enc, "port");
+
+ if (valid_enc == NULL)
+ valid_enc = "ISO-8859-1";
+
+ if (SCM_CELL_WORD_0 (port) & SCM_RDNG)
+ {
+ /* Open an input iconv conversion descriptor, from VALID_ENC
+ to UTF-8. We choose UTF-8, not UTF-32, because iconv
+ implementations can typically convert from anything to
+ UTF-8, but not to UTF-32 (see
+ <http://lists.gnu.org/archive/html/bug-libunistring/2010-09/msg00007.html>). */
+ new_input_cd = iconv_open ("UTF-8", valid_enc);
+ if (new_input_cd == (iconv_t) -1)
+ goto invalid_encoding;
+ }
+
+ if (SCM_CELL_WORD_0 (port) & SCM_WRTNG)
+ {
+ new_output_cd = iconv_open (valid_enc, "UTF-8");
+ if (new_output_cd == (iconv_t) -1)
+ {
+ if (new_input_cd != (iconv_t) -1)
+ iconv_close (new_input_cd);
+ goto invalid_encoding;
+ }
+ }
+
+ if (pt->input_cd != (iconv_t) -1)
+ iconv_close (pt->input_cd);
+ if (pt->output_cd != (iconv_t) -1)
+ iconv_close (pt->output_cd);
+
+ pt->input_cd = new_input_cd;
+ pt->output_cd = new_output_cd;
+ }
+
+ return;
+
+ invalid_encoding:
+ {
+ SCM err;
+ err = scm_from_locale_string (enc);
+ scm_misc_error (NULL, "invalid or unknown character encoding ~s",
+ scm_list_1 (err));
+ }
+}
+
+SCM_DEFINE (scm_port_encoding, "port-encoding", 1, 0, 0,
+ (SCM port),
+ "Returns, as a string, the character encoding that @var{port}\n"
+ "uses to interpret its input and output.\n")
+#define FUNC_NAME s_scm_port_encoding
+{
+ scm_t_port *pt;
+ const char *enc;
+
+ SCM_VALIDATE_PORT (1, port);
+
+ pt = SCM_PTAB_ENTRY (port);
+ enc = scm_i_get_port_encoding (port);
+ if (enc)
+ return scm_from_locale_string (pt->encoding);
+ else
+ return SCM_BOOL_F;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_set_port_encoding_x, "set-port-encoding!", 2, 0, 0,
+ (SCM port, SCM enc),
+ "Sets the character encoding that will be used to interpret all\n"
+ "port I/O. New ports are created with the encoding\n"
+ "appropriate for the current locale if @code{setlocale} has \n"
+ "been called or ISO-8859-1 otherwise\n"
+ "and this procedure can be used to modify that encoding.\n")
+#define FUNC_NAME s_scm_set_port_encoding_x
+{
+ char *enc_str;
+ const char *valid_enc_str;
+
+ SCM_VALIDATE_PORT (1, port);
+ SCM_VALIDATE_STRING (2, enc);
+
+ enc_str = scm_to_locale_string (enc);
+ valid_enc_str = find_valid_encoding (enc_str);
+ if (valid_enc_str == NULL)
+ {
+ free (enc_str);
+ scm_misc_error (FUNC_NAME, "invalid or unknown character encoding ~s",
+ scm_list_1 (enc));
+ }
+ else
+ {
+ scm_i_set_port_encoding_x (port, valid_enc_str);
+ free (enc_str);
+ }
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+
+/* This determines how conversions handle unconvertible characters. */
+SCM_GLOBAL_VARIABLE (scm_conversion_strategy, "%port-conversion-strategy");
+static int scm_conversion_strategy_init = 0;
+
+scm_t_string_failed_conversion_handler
+scm_i_get_conversion_strategy (SCM port)
+{
+ SCM encoding;
+
+ if (scm_is_false (port))
+ {
+ if (!scm_conversion_strategy_init
+ || !scm_is_fluid (SCM_VARIABLE_REF (scm_conversion_strategy)))
+ return SCM_FAILED_CONVERSION_QUESTION_MARK;
+ else
+ {
+ encoding = scm_fluid_ref (SCM_VARIABLE_REF (scm_conversion_strategy));
+ if (scm_is_false (encoding))
+ return SCM_FAILED_CONVERSION_QUESTION_MARK;
+ else
+ return (scm_t_string_failed_conversion_handler) scm_to_int (encoding);
+ }
+ }
+ else
+ {
+ scm_t_port *pt;
+ pt = SCM_PTAB_ENTRY (port);
+ return pt->ilseq_handler;
+ }
+
+}
+
+void
+scm_i_set_conversion_strategy_x (SCM port,
+ scm_t_string_failed_conversion_handler handler)
+{
+ SCM strategy;
+ scm_t_port *pt;
+
+ strategy = scm_from_int ((int) handler);
+
+ if (scm_is_false (port))
+ {
+ /* Set the default encoding for future ports. */
+ if (!scm_conversion_strategy
+ || !scm_is_fluid (SCM_VARIABLE_REF (scm_conversion_strategy)))
+ scm_misc_error (NULL, "tried to set conversion strategy fluid before it is initialized",
+ SCM_EOL);
+ scm_fluid_set_x (SCM_VARIABLE_REF (scm_conversion_strategy), strategy);
+ }
+ else
+ {
+ /* Set the character encoding for this port. */
+ pt = SCM_PTAB_ENTRY (port);
+ pt->ilseq_handler = handler;
+ }
+}
+
+SCM_DEFINE (scm_port_conversion_strategy, "port-conversion-strategy",
+ 1, 0, 0, (SCM port),
+ "Returns the behavior of the port when handling a character that\n"
+ "is not representable in the port's current encoding.\n"
+ "It returns the symbol @code{error} if unrepresentable characters\n"
+ "should cause exceptions, @code{substitute} if the port should\n"
+ "try to replace unrepresentable characters with question marks or\n"
+ "approximate characters, or @code{escape} if unrepresentable\n"
+ "characters should be converted to string escapes.\n"
+ "\n"
+ "If @var{port} is @code{#f}, then the current default behavior\n"
+ "will be returned. New ports will have this default behavior\n"
+ "when they are created.\n")
+#define FUNC_NAME s_scm_port_conversion_strategy
+{
+ scm_t_string_failed_conversion_handler h;
+
+ SCM_VALIDATE_OPPORT (1, port);
+
+ if (!scm_is_false (port))
+ {
+ SCM_VALIDATE_OPPORT (1, port);
+ }
+
+ h = scm_i_get_conversion_strategy (port);
+ if (h == SCM_FAILED_CONVERSION_ERROR)
+ return scm_from_latin1_symbol ("error");
+ else if (h == SCM_FAILED_CONVERSION_QUESTION_MARK)
+ return scm_from_latin1_symbol ("substitute");
+ else if (h == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE)
+ return scm_from_latin1_symbol ("escape");
+ else
+ abort ();
+
+ /* Never gets here. */
+ return SCM_UNDEFINED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_set_port_conversion_strategy_x, "set-port-conversion-strategy!",
+ 2, 0, 0,
+ (SCM port, SCM sym),
+ "Sets the behavior of the interpreter when outputting a character\n"
+ "that is not representable in the port's current encoding.\n"
+ "@var{sym} can be either @code{'error}, @code{'substitute}, or\n"
+ "@code{'escape}. If it is @code{'error}, an error will be thrown\n"
+ "when an unconvertible character is encountered. If it is\n"
+ "@code{'substitute}, then unconvertible characters will \n"
+ "be replaced with approximate characters, or with question marks\n"
+ "if no approximately correct character is available.\n"
+ "If it is @code{'escape},\n"
+ "it will appear as a hex escape when output.\n"
+ "\n"
+ "If @var{port} is an open port, the conversion error behavior\n"
+ "is set for that port. If it is @code{#f}, it is set as the\n"
+ "default behavior for any future ports that get created in\n"
+ "this thread.\n")
+#define FUNC_NAME s_scm_set_port_conversion_strategy_x
+{
+ SCM err;
+ SCM qm;
+ SCM esc;
+
+ if (!scm_is_false (port))
+ {
+ SCM_VALIDATE_OPPORT (1, port);
+ }
+
+ err = scm_from_latin1_symbol ("error");
+ if (scm_is_true (scm_eqv_p (sym, err)))
+ {
+ scm_i_set_conversion_strategy_x (port, SCM_FAILED_CONVERSION_ERROR);
+ return SCM_UNSPECIFIED;
+ }
+
+ qm = scm_from_latin1_symbol ("substitute");
+ if (scm_is_true (scm_eqv_p (sym, qm)))
+ {
+ scm_i_set_conversion_strategy_x (port,
+ SCM_FAILED_CONVERSION_QUESTION_MARK);
+ return SCM_UNSPECIFIED;
+ }
+
+ esc = scm_from_latin1_symbol ("escape");
+ if (scm_is_true (scm_eqv_p (sym, esc)))
+ {
+ scm_i_set_conversion_strategy_x (port,
+ SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE);
+ return SCM_UNSPECIFIED;
+ }
+
+ SCM_MISC_ERROR ("unknown conversion behavior ~s", scm_list_1 (sym));
+
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+
+
void
scm_print_port_mode (SCM exp, SCM port)
{
return 1;
}
-void
-scm_ports_prehistory ()
-{
- scm_numptob = 0;
- scm_ptobs = NULL;
-
- /* In order for the ports to be collectable, the port table must not be
- scanned by the GC. */
- scm_i_port_table =
- scm_gc_malloc_pointerless (scm_i_port_table_room
- * sizeof (scm_t_port *),
- "port-table");
-}
-
\f
/* Void ports. */
scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port,
write_void_port);
- cur_inport_fluid = scm_permanent_object (scm_make_fluid ());
- cur_outport_fluid = scm_permanent_object (scm_make_fluid ());
- cur_errport_fluid = scm_permanent_object (scm_make_fluid ());
- cur_loadport_fluid = scm_permanent_object (scm_make_fluid ());
+ cur_inport_fluid = scm_make_fluid ();
+ cur_outport_fluid = scm_make_fluid ();
+ cur_errport_fluid = scm_make_fluid ();
+ cur_loadport_fluid = scm_make_fluid ();
+
+ scm_i_port_weak_hash = scm_make_weak_key_hash_table (SCM_I_MAKINUM(31));
#include "libguile/ports.x"
+
+ /* Use Latin-1 as the default port encoding. */
+ SCM_VARIABLE_SET (default_port_encoding_var, scm_make_fluid ());
+ scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), SCM_BOOL_F);
+ scm_port_encoding_init = 1;
+
+ SCM_VARIABLE_SET (scm_conversion_strategy, scm_make_fluid ());
+ scm_fluid_set_x (SCM_VARIABLE_REF (scm_conversion_strategy),
+ scm_from_int ((int) SCM_FAILED_CONVERSION_QUESTION_MARK));
+ scm_conversion_strategy_init = 1;
+
}
/*
HCoop / bpt / guile.git / blobdiff