-/* Copyright (C) 2009, 2010, 2011, 2013 Free Software Foundation, Inc.
+/* Copyright (C) 2009, 2010, 2011, 2013-2015 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
# include <config.h>
#endif
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
+#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "libguile/validate.h"
#include "libguile/values.h"
#include "libguile/vectors.h"
+#include "libguile/ports-internal.h"
\f
scm_t_port *c_port;
const unsigned long mode_bits = SCM_OPN | SCM_RDNG;
- scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
+ port = scm_c_make_port_with_encoding (bytevector_input_port_type,
+ mode_bits,
+ NULL, /* encoding */
+ SCM_FAILED_CONVERSION_ERROR,
+ SCM_UNPACK (bv));
- port = scm_new_port_table_entry (bytevector_input_port_type);
c_port = SCM_PTAB_ENTRY (port);
- /* Match the expectation of `binary-port?'. */
- c_port->encoding = NULL;
-
- /* Prevent BV from being GC'd. */
- SCM_SETSTREAM (port, SCM_UNPACK (bv));
-
/* Have the port directly access the bytevector. */
c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv);
c_len = SCM_BYTEVECTOR_LENGTH (bv);
c_port->read_end = (unsigned char *) c_bv + c_len;
c_port->read_buf_size = c_len;
- /* Mark PORT as open, readable and unbuffered (hmm, how elegant...). */
- SCM_SET_CELL_TYPE (port, bytevector_input_port_type | mode_bits);
-
- scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
-
return port;
}
result = scm_call_0 (get_position_proc);
else
scm_wrong_type_arg_msg (FUNC_NAME, 0, port,
- "R6RS custom binary port does not "
- "support `port-position'");
-
- offset += scm_to_int (result);
+ "R6RS custom binary port with "
+ "`port-position' support");
+ c_result = scm_to_int (result);
+ if (offset == 0)
+ /* We just want to know the current position. */
+ break;
+
+ offset += c_result;
/* Fall through. */
}
result = scm_call_1 (set_position_proc, scm_from_int (offset));
else
scm_wrong_type_arg_msg (FUNC_NAME, 0, port,
- "R6RS custom binary port does not "
- "support `set-port-position!'");
+ "seekable R6RS custom binary port");
/* Assuming setting the position succeeded. */
c_result = offset;
static scm_t_bits custom_binary_input_port_type = 0;
-/* Size of the buffer embedded in custom binary input ports. */
-#define CBIP_BUFFER_SIZE 4096
+/* Initial size of the buffer embedded in custom binary input ports. */
+#define CBIP_BUFFER_SIZE 8192
/* Return the bytevector associated with PORT. */
#define SCM_CBIP_BYTEVECTOR(_port) \
SCM_SIMPLE_VECTOR_REF (SCM_PACK (SCM_STREAM (_port)), 4)
+/* Set BV as the bytevector associated with PORT. */
+#define SCM_SET_CBIP_BYTEVECTOR(_port, _bv) \
+ SCM_SIMPLE_VECTOR_SET (SCM_PACK (SCM_STREAM (_port)), 4, (_bv))
+
/* Return the various procedures of PORT. */
#define SCM_CBIP_READ_PROC(_port) \
SCM_SIMPLE_VECTOR_REF (SCM_PACK (SCM_STREAM (_port)), 0)
+/* Set PORT's internal buffer according to READ_SIZE. */
+static void
+cbip_setvbuf (SCM port, long read_size, long write_size)
+{
+ SCM bv;
+ scm_t_port *pt;
+
+ pt = SCM_PTAB_ENTRY (port);
+ bv = SCM_CBIP_BYTEVECTOR (port);
+
+ switch (read_size)
+ {
+ case 0:
+ /* Unbuffered: keep using PORT's bytevector as the underlying
+ buffer (it will also be used by future 'scm_c_read' calls.) */
+ assert (SCM_BYTEVECTOR_LENGTH (bv) >= 1);
+ pt->read_buf = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv);
+ pt->read_buf_size = 1;
+ break;
+
+ case -1:
+ /* Preferred size: keep the current bytevector and use it as the
+ backing store. */
+ pt->read_buf = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv);
+ pt->read_buf_size = SCM_BYTEVECTOR_LENGTH (bv);
+ break;
+
+ default:
+ /* Fully buffered: allocate a buffer of READ_SIZE bytes. */
+ bv = scm_c_make_bytevector (read_size);
+ SCM_SET_CBIP_BYTEVECTOR (port, bv);
+ pt->read_buf = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv);
+ pt->read_buf_size = read_size;
+ }
+
+ pt->read_pos = pt->read_end = pt->read_buf;
+}
+
static inline SCM
make_cbip (SCM read_proc, SCM get_position_proc,
SCM set_position_proc, SCM close_proc)
SCM_SIMPLE_VECTOR_SET (method_vector, 2, set_position_proc);
SCM_SIMPLE_VECTOR_SET (method_vector, 3, close_proc);
- scm_i_pthread_mutex_lock (&scm_i_port_table_mutex);
+ port = scm_c_make_port_with_encoding (custom_binary_input_port_type,
+ mode_bits,
+ NULL, /* encoding */
+ SCM_FAILED_CONVERSION_ERROR,
+ SCM_UNPACK (method_vector));
- port = scm_new_port_table_entry (custom_binary_input_port_type);
c_port = SCM_PTAB_ENTRY (port);
- /* Match the expectation of `binary-port?'. */
- c_port->encoding = NULL;
-
- /* Attach it the method vector. */
- SCM_SETSTREAM (port, SCM_UNPACK (method_vector));
-
/* Have the port directly access the buffer (bytevector). */
c_port->read_pos = c_port->read_buf = (unsigned char *) c_bv;
c_port->read_end = (unsigned char *) c_bv;
c_port->read_buf_size = c_len;
- /* Mark PORT as open, readable and unbuffered (hmm, how elegant...). */
- SCM_SET_CELL_TYPE (port, custom_binary_input_port_type | mode_bits);
-
- scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
-
return port;
}
int result;
scm_t_port *c_port = SCM_PTAB_ENTRY (port);
- again:
if (c_port->read_pos >= c_port->read_end)
{
/* Invoke the user's `read!' procedure. */
- unsigned c_octets;
+ int buffered;
+ size_t c_octets, c_requested;
SCM bv, read_proc, octets;
- /* Use the bytevector associated with PORT as the buffer passed to the
- `read!' procedure, thereby avoiding additional allocations. */
- bv = SCM_CBIP_BYTEVECTOR (port);
+ c_requested = c_port->read_buf_size;
read_proc = SCM_CBIP_READ_PROC (port);
- /* The assumption here is that C_PORT's internal buffer wasn't changed
- behind our back. */
- assert (c_port->read_buf ==
- (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv));
- assert ((unsigned) c_port->read_buf_size
- == SCM_BYTEVECTOR_LENGTH (bv));
+ bv = SCM_CBIP_BYTEVECTOR (port);
+ buffered =
+ (c_port->read_buf == (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv));
+
+ if (buffered)
+ {
+ /* Make sure the buffer isn't corrupt. Its size can be 1 when
+ someone called 'setvbuf' with _IONBF. BV can be passed
+ directly to READ_PROC. */
+ assert (c_port->read_buf_size == SCM_BYTEVECTOR_LENGTH (bv)
+ || c_port->read_buf_size == 1);
+ c_port->read_pos = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv);
+ }
+ else
+ {
+ /* This is an unbuffered port. When called via the
+ 'get-bytevector-*' procedures, and thus via 'scm_c_read', we
+ are passed the caller-provided buffer, so we need to check its
+ size. */
+ if (SCM_BYTEVECTOR_LENGTH (bv) < c_requested)
+ {
+ /* Bad luck: we have to make another allocation. Save that
+ bytevector for later reuse, in the hope that the application
+ has regular access patterns. */
+ bv = scm_c_make_bytevector (c_requested);
+ SCM_SET_CBIP_BYTEVECTOR (port, bv);
+ }
+ }
octets = scm_call_3 (read_proc, bv, SCM_INUM0,
- SCM_I_MAKINUM (CBIP_BUFFER_SIZE));
- c_octets = scm_to_uint (octets);
+ scm_from_size_t (c_requested));
+ c_octets = scm_to_size_t (octets);
+ if (SCM_UNLIKELY (c_octets > c_requested))
+ scm_out_of_range (FUNC_NAME, octets);
+
+ if (!buffered)
+ /* Copy the data back to the internal buffer. */
+ memcpy ((char *) c_port->read_pos, SCM_BYTEVECTOR_CONTENTS (bv),
+ c_octets);
- c_port->read_pos = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv);
c_port->read_end = (unsigned char *) c_port->read_pos + c_octets;
- if (c_octets > 0)
- goto again;
+ if (c_octets != 0 || c_requested == 0)
+ result = (int) *c_port->read_pos;
else
result = EOF;
}
scm_set_port_seek (custom_binary_input_port_type, cbp_seek);
scm_set_port_close (custom_binary_input_port_type, cbp_close);
+ scm_set_port_setvbuf (custom_binary_input_port_type, cbip_setvbuf);
}
if (SCM_LIKELY (c_count > 0))
/* XXX: `scm_c_read ()' does not update the port position. */
- c_read = scm_c_read (port, c_bv, c_count);
+ c_read = scm_c_read_unlocked (port, c_bv, c_count);
else
/* Don't invoke `scm_c_read ()' since it may block. */
c_read = 0;
- if ((c_read == 0) && (c_count > 0))
+ if (c_read < c_count)
{
- if (scm_peek_byte_or_eof (port) == EOF)
- result = SCM_EOF_VAL;
+ if (c_read == 0)
+ result = SCM_EOF_VAL;
else
- result = scm_null_bytevector;
- }
- else
- {
- if (c_read < c_count)
result = scm_c_shrink_bytevector (result, c_read);
}
scm_out_of_range (FUNC_NAME, count);
if (SCM_LIKELY (c_count > 0))
- c_read = scm_c_read (port, c_bv + c_start, c_count);
+ c_read = scm_c_read_unlocked (port, c_bv + c_start, c_count);
else
/* Don't invoke `scm_c_read ()' since it may block. */
c_read = 0;
- if ((c_read == 0) && (c_count > 0))
- {
- if (scm_peek_byte_or_eof (port) == EOF)
- result = SCM_EOF_VAL;
- else
- result = SCM_I_MAKINUM (0);
- }
+ if (c_read == 0 && c_count > 0)
+ result = SCM_EOF_VAL;
else
result = scm_from_size_t (c_read);
SCM_DEFINE (scm_get_bytevector_some, "get-bytevector-some", 1, 0, 0,
(SCM port),
- "Read from @var{port}, blocking as necessary, until data "
- "are available or and end-of-file is reached. Return either "
- "a new bytevector containing the data read or the "
- "end-of-file object.")
+ "Read from @var{port}, blocking as necessary, until bytes "
+ "are available or an end-of-file is reached. Return either "
+ "the end-of-file object or a new bytevector containing some "
+ "of the available bytes (at least one), and update the port "
+ "position to point just past these bytes.")
#define FUNC_NAME s_scm_get_bytevector_some
{
- /* Read at least one byte, unless the end-of-file is already reached, and
- read while characters are available (buffered). */
-
- SCM result;
- char *c_bv;
- unsigned c_len;
- size_t c_total;
+ scm_t_port *pt;
+ size_t size;
+ SCM bv;
SCM_VALIDATE_BINARY_INPUT_PORT (1, port);
+ pt = SCM_PTAB_ENTRY (port);
- c_len = 4096;
- c_bv = (char *) scm_gc_malloc_pointerless (c_len, SCM_GC_BYTEVECTOR);
- c_total = 0;
+ if (pt->rw_active == SCM_PORT_WRITE)
+ scm_flush_unlocked (port);
- do
- {
- int c_chr;
-
- if (c_total + 1 > c_len)
- {
- /* Grow the bytevector. */
- c_bv = (char *) scm_gc_realloc (c_bv, c_len, c_len * 2,
- SCM_GC_BYTEVECTOR);
- c_len *= 2;
- }
+ if (pt->rw_random)
+ pt->rw_active = SCM_PORT_READ;
- /* We can't use `scm_c_read ()' since it blocks. */
- c_chr = scm_get_byte_or_eof (port);
- if (c_chr != EOF)
- {
- c_bv[c_total] = (char) c_chr;
- c_total++;
- }
- }
- /* XXX: We want to check for the availability of a byte, but that's
- what `scm_char_ready_p' actually does. */
- while (scm_is_true (scm_char_ready_p (port))
- && (scm_peek_byte_or_eof (port) != EOF));
-
- if (c_total == 0)
+ if (pt->read_pos >= pt->read_end)
{
- result = SCM_EOF_VAL;
- scm_gc_free (c_bv, c_len, SCM_GC_BYTEVECTOR);
+ if (scm_fill_input_unlocked (port) == EOF)
+ return SCM_EOF_VAL;
}
- else
- {
- if (c_len > c_total)
- {
- /* Shrink the bytevector. */
- c_bv = (char *) scm_gc_realloc (c_bv, c_len, c_total,
- SCM_GC_BYTEVECTOR);
- c_len = (unsigned) c_total;
- }
- result = scm_c_take_gc_bytevector ((signed char *) c_bv, c_len);
- }
+ size = pt->read_end - pt->read_pos;
+ if (pt->read_buf == pt->putback_buf)
+ size += pt->saved_read_end - pt->saved_read_pos;
- return result;
+ bv = scm_c_make_bytevector (size);
+ scm_take_from_input_buffers
+ (port, (char *) SCM_BYTEVECTOR_CONTENTS (bv), size);
+
+ return bv;
}
#undef FUNC_NAME
/* `scm_c_read ()' blocks until C_COUNT bytes are available or EOF is
reached. */
- c_read = scm_c_read (port, c_bv + c_total, c_count);
+ c_read = scm_c_read_unlocked (port, c_bv + c_total, c_count);
c_total += c_read, c_count -= c_read;
}
- while (scm_peek_byte_or_eof (port) != EOF);
+ while (c_count == 0);
if (c_total == 0)
{
c_len = (unsigned) c_total;
}
- result = scm_c_take_gc_bytevector ((signed char *) c_bv, c_len);
+ result = scm_c_take_gc_bytevector ((signed char *) c_bv, c_len,
+ SCM_BOOL_F);
}
return result;
SCM_VALIDATE_BINARY_OUTPUT_PORT (1, port);
c_octet = scm_to_uint8 (octet);
- scm_putc ((char) c_octet, port);
+ scm_putc_unlocked ((char) c_octet, port);
return SCM_UNSPECIFIED;
}
else
c_start = 0, c_count = c_len;
- scm_c_write (port, c_bv + c_start, c_count);
+ scm_c_write_unlocked (port, c_bv + c_start, c_count);
+
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_unget_bytevector, "unget-bytevector", 2, 2, 0,
+ (SCM port, SCM bv, SCM start, SCM count),
+ "Unget the contents of @var{bv} to @var{port}, optionally "
+ "starting at index @var{start} and limiting to @var{count} "
+ "octets.")
+#define FUNC_NAME s_scm_unget_bytevector
+{
+ unsigned char *c_bv;
+ size_t c_start, c_count, c_len;
+
+ SCM_VALIDATE_BINARY_INPUT_PORT (1, port);
+ SCM_VALIDATE_BYTEVECTOR (2, bv);
+
+ c_len = SCM_BYTEVECTOR_LENGTH (bv);
+ c_bv = (unsigned char *) SCM_BYTEVECTOR_CONTENTS (bv);
+
+ if (!scm_is_eq (start, SCM_UNDEFINED))
+ {
+ c_start = scm_to_size_t (start);
+
+ if (!scm_is_eq (count, SCM_UNDEFINED))
+ {
+ c_count = scm_to_size_t (count);
+ if (SCM_UNLIKELY (c_start + c_count > c_len))
+ scm_out_of_range (FUNC_NAME, count);
+ }
+ else
+ {
+ if (SCM_UNLIKELY (c_start >= c_len))
+ scm_out_of_range (FUNC_NAME, start);
+ else
+ c_count = c_len - c_start;
+ }
+ }
+ else
+ c_start = 0, c_count = c_len;
+
+ scm_unget_bytes (c_bv + c_start, c_count, port);
return SCM_UNSPECIFIED;
}
scm_t_bop_buffer *buf;
const unsigned long mode_bits = SCM_OPN | SCM_WRTNG;
- scm_i_pthread_mutex_lock (&scm_i_port_table_mutex);
-
- port = scm_new_port_table_entry (bytevector_output_port_type);
- c_port = SCM_PTAB_ENTRY (port);
-
- /* Match the expectation of `binary-port?'. */
- c_port->encoding = NULL;
-
buf = (scm_t_bop_buffer *) scm_gc_malloc (sizeof (* buf), SCM_GC_BOP);
bop_buffer_init (buf);
- c_port->write_buf = c_port->write_pos = c_port->write_end = NULL;
- c_port->write_buf_size = 0;
-
- SCM_SET_BOP_BUFFER (port, buf);
+ port = scm_c_make_port_with_encoding (bytevector_output_port_type,
+ mode_bits,
+ NULL, /* encoding */
+ SCM_FAILED_CONVERSION_ERROR,
+ (scm_t_bits)buf);
- /* Mark PORT as open and writable. */
- SCM_SET_CELL_TYPE (port, bytevector_output_port_type | mode_bits);
+ c_port = SCM_PTAB_ENTRY (port);
- scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
+ c_port->write_buf = c_port->write_pos = c_port->write_end = NULL;
+ c_port->write_buf_size = 0;
/* Make the bop procedure. */
SCM_NEWSMOB (bop_proc, bytevector_output_port_procedure, buf);
bop_buffer_init (buf);
if (result_buf.len == 0)
- bv = scm_c_take_gc_bytevector (NULL, 0);
+ bv = scm_c_take_gc_bytevector (NULL, 0, SCM_BOOL_F);
else
{
if (result_buf.total_len > result_buf.len)
SCM_GC_BOP);
bv = scm_c_take_gc_bytevector ((signed char *) result_buf.buffer,
- result_buf.len);
+ result_buf.len, SCM_BOOL_F);
}
return bv;
SCM_SIMPLE_VECTOR_SET (method_vector, 2, set_position_proc);
SCM_SIMPLE_VECTOR_SET (method_vector, 3, close_proc);
- scm_i_pthread_mutex_lock (&scm_i_port_table_mutex);
+ port = scm_c_make_port_with_encoding (custom_binary_output_port_type,
+ mode_bits,
+ NULL, /* encoding */
+ SCM_FAILED_CONVERSION_ERROR,
+ SCM_UNPACK (method_vector));
- port = scm_new_port_table_entry (custom_binary_output_port_type);
c_port = SCM_PTAB_ENTRY (port);
- /* Match the expectation of `binary-port?'. */
- c_port->encoding = NULL;
-
- /* Attach it the method vector. */
- SCM_SETSTREAM (port, SCM_UNPACK (method_vector));
-
/* Have the port directly access the buffer (bytevector). */
c_port->write_buf = c_port->write_pos = c_port->write_end = NULL;
c_port->write_buf_size = c_port->read_buf_size = 0;
- /* Mark PORT as open, writable and unbuffered. */
- SCM_SET_CELL_TYPE (port, custom_binary_output_port_type | mode_bits);
-
- scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
-
return port;
}
scm_t_port *c_port;
const unsigned long mode_bits = SCM_OPN | mode;
- scm_i_pthread_mutex_lock (&scm_i_port_table_mutex);
-
- port = scm_new_port_table_entry (transcoded_port_type);
-
- SCM_SETSTREAM (port, SCM_UNPACK (binary_port));
-
- SCM_SET_CELL_TYPE (port, transcoded_port_type | mode_bits);
+ port = scm_c_make_port (transcoded_port_type, mode_bits,
+ SCM_UNPACK (binary_port));
if (SCM_INPUT_PORT_P (port))
{
SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~SCM_BUF0);
}
- scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
-
return port;
}
static void
tp_write (SCM port, const void *data, size_t size)
{
- scm_c_write (SCM_TP_BINARY_PORT (port), data, size);
+ scm_c_write_unlocked (SCM_TP_BINARY_PORT (port), data, size);
}
static int
scm_force_output (bport);
if (c_bport->read_pos >= c_bport->read_end)
- scm_fill_input (bport);
+ scm_fill_input_unlocked (bport);
count = c_bport->read_end - c_bport->read_pos;
if (count > c_port->read_buf_size)
We just throw away the data when the underlying port is closed. */
if (SCM_OPOUTPORTP (binary_port))
- scm_c_write (binary_port, c_port->write_buf, count);
+ scm_c_write_unlocked (binary_port, c_port->write_buf, count);
c_port->write_pos = c_port->write_buf;
c_port->rw_active = SCM_PORT_NEITHER;
scm_set_port_close (transcoded_port_type, tp_close);
}
+SCM_INTERNAL SCM scm_i_make_transcoded_port (SCM);
+
SCM_DEFINE (scm_i_make_transcoded_port,
"%make-transcoded-port", 1, 0, 0,
(SCM port),
for (j = c_start; j < c_end; j++)
{
- c = scm_getc (port);
+ c = scm_getc_unlocked (port);
if (c == EOF)
{
size_t chars_read = j - c_start;
HCoop / bpt / guile.git / blobdiff