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Make port properties accessible from Scheme.

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* libguile/ports.c (scm_i_port_alist, scm_i_set_port_alist_x): Removed.
  (scm_i_port_property, scm_i_set_port_property_x): New procedures,
  available from Scheme as '%port-property' and '%set-port-property!'.

* libguile/ports.h (scm_i_port_alist, scm_i_set_port_alist_x): Removed.
  (scm_i_port_property, scm_i_set_port_property_x): New prototypes.

* libguile/read.c (set_port_read_option, init_read_options): Adapt to
  use scm_i_port_property and scm_i_set_port_property_x.
This commit is contained in:
Mark H Weaver 2013-11-17 01:11:57 -05:00
parent 2437c7b2e8
commit a38024baaa
3 changed files with 31 additions and 21 deletions
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25
libguile/ports.c
View file

@ -61,6 +61,7 @@
#include "libguile/weaks.h"
#include "libguile/fluids.h"
#include "libguile/eq.h"
#include "libguile/alist.h"
#ifdef HAVE_STRING_H
#include <string.h>
@ -254,17 +255,29 @@ scm_i_clear_pending_eof (SCM port)
SCM_PORT_GET_INTERNAL (port)->pending_eof = 0;
}
SCM
scm_i_port_alist (SCM port)
SCM_DEFINE (scm_i_port_property, "%port-property", 2, 0, 0,
(SCM port, SCM key),
"Return the property of @var{port} associated with @var{key}.")
#define FUNC_NAME s_scm_i_port_property
{
return SCM_PORT_GET_INTERNAL (port)->alist;
SCM_VALIDATE_OPPORT (1, port);
return scm_assq_ref (SCM_PORT_GET_INTERNAL (port)->alist, key);
}
#undef FUNC_NAME
void
scm_i_set_port_alist_x (SCM port, SCM alist)
SCM_DEFINE (scm_i_set_port_property_x, "%set-port-property!", 3, 0, 0,
(SCM port, SCM key, SCM value),
"Set the property of @var{port} associated with @var{key} to @var{value}.")
#define FUNC_NAME s_scm_i_set_port_property_x
{
SCM_PORT_GET_INTERNAL (port)->alist = alist;
scm_t_port_internal *pti;
SCM_VALIDATE_OPPORT (1, port);
pti = SCM_PORT_GET_INTERNAL (port);
pti->alist = scm_assq_set_x (pti->alist, key, value);
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME

4
libguile/ports.h
View file

@ -317,8 +317,8 @@ SCM_API SCM scm_port_column (SCM port);
SCM_API SCM scm_set_port_column_x (SCM port, SCM line);
SCM_API SCM scm_port_filename (SCM port);
SCM_API SCM scm_set_port_filename_x (SCM port, SCM filename);
SCM_INTERNAL SCM scm_i_port_alist (SCM port);
SCM_INTERNAL void scm_i_set_port_alist_x (SCM port, SCM alist);
SCM_INTERNAL SCM scm_i_port_property (SCM port, SCM key);
SCM_INTERNAL SCM scm_i_set_port_property_x (SCM port, SCM key, SCM value);
SCM_INTERNAL const char *scm_i_default_port_encoding (void);
SCM_INTERNAL void scm_i_set_default_port_encoding (const char *);
SCM_INTERNAL void scm_i_set_port_encoding_x (SCM port, const char *str);

23
libguile/read.c
View file

@ -2133,10 +2133,10 @@ SCM_DEFINE (scm_file_encoding, "file-encoding", 1, 0, 0,
/* Per-port read options.
We store per-port read options in the 'port-read-options' key of the
port's alist, which is stored in the internal port structure. The
value stored in the alist is a single integer that contains a two-bit
field for each read option.
We store per-port read options in the 'port-read-options' port
property, which is stored in the internal port structure. The value
stored is a single integer that contains a two-bit field for each
read option.
If a bit field contains READ_OPTION_INHERIT (3), that indicates that
the applicable value should be inherited from the corresponding
@ -2146,7 +2146,7 @@ SCM_DEFINE (scm_file_encoding, "file-encoding", 1, 0, 0,
read option has been set per-port, its possible values are those in
'enum t_keyword_style'. */
/* Key to read options in per-port alists. */
/* Key to read options in port properties. */
SCM_SYMBOL (sym_port_read_options, "port-read-options");
/* Offsets of bit fields for each per-port override */
@ -2171,12 +2171,11 @@ SCM_SYMBOL (sym_port_read_options, "port-read-options");
static void
set_port_read_option (SCM port, int option, int new_value)
{
SCM alist, scm_read_options;
SCM scm_read_options;
unsigned int read_options;
new_value &= READ_OPTION_MASK;
alist = scm_i_port_alist (port);
scm_read_options = scm_assq_ref (alist, sym_port_read_options);
scm_read_options = scm_i_port_property (port, sym_port_read_options);
if (scm_is_unsigned_integer (scm_read_options, 0, READ_OPTIONS_MAX_VALUE))
read_options = scm_to_uint (scm_read_options);
else
@ -2184,8 +2183,7 @@ set_port_read_option (SCM port, int option, int new_value)
read_options &= ~(READ_OPTION_MASK << option);
read_options |= new_value << option;
scm_read_options = scm_from_uint (read_options);
alist = scm_assq_set_x (alist, sym_port_read_options, scm_read_options);
scm_i_set_port_alist_x (port, alist);
scm_i_set_port_property_x (port, sym_port_read_options, scm_read_options);
}
/* Set OPTS and PORT's case-insensitivity according to VALUE. */
@ -2220,11 +2218,10 @@ set_port_curly_infix_p (SCM port, scm_t_read_opts *opts, int value)
static void
init_read_options (SCM port, scm_t_read_opts *opts)
{
SCM alist, val, scm_read_options;
SCM val, scm_read_options;
unsigned int read_options, x;
alist = scm_i_port_alist (port);
scm_read_options = scm_assq_ref (alist, sym_port_read_options);
scm_read_options = scm_i_port_property (port, sym_port_read_options);
if (scm_is_unsigned_integer (scm_read_options, 0, READ_OPTIONS_MAX_VALUE))
read_options = scm_to_uint (scm_read_options);