/* Finalize the object (a port) pointed to by PTR. */
static void
-finalize_port (GC_PTR ptr, GC_PTR data)
+finalize_port (void *ptr, void *data)
{
SCM port = SCM_PACK_POINTER (ptr);
{
return scm_c_make_port_with_encoding (tag, mode_bits,
scm_i_default_port_encoding (),
- scm_i_get_conversion_strategy (SCM_BOOL_F),
+ scm_i_default_port_conversion_handler (),
stream);
}
}
}
+/* A fluid specifying the default conversion handler for newly created
+ ports. Its value should be one of the symbols below. */
+SCM_VARIABLE (default_conversion_strategy_var,
+ "%default-port-conversion-strategy");
+
+/* Whether the above fluid is initialized. */
+static int scm_conversion_strategy_init = 0;
+
+/* The possible conversion strategies. */
+SCM_SYMBOL (sym_error, "error");
+SCM_SYMBOL (sym_substitute, "substitute");
+SCM_SYMBOL (sym_escape, "escape");
+
+/* Return the default failed encoding conversion policy for new created
+ ports. */
+scm_t_string_failed_conversion_handler
+scm_i_default_port_conversion_handler (void)
+{
+ scm_t_string_failed_conversion_handler handler;
+
+ if (!scm_conversion_strategy_init
+ || !scm_is_fluid (SCM_VARIABLE_REF (default_conversion_strategy_var)))
+ handler = SCM_FAILED_CONVERSION_QUESTION_MARK;
+ else
+ {
+ SCM fluid, value;
+
+ fluid = SCM_VARIABLE_REF (default_conversion_strategy_var);
+ value = scm_fluid_ref (fluid);
+
+ if (scm_is_eq (sym_substitute, value))
+ handler = SCM_FAILED_CONVERSION_QUESTION_MARK;
+ else if (scm_is_eq (sym_escape, value))
+ handler = SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE;
+ else
+ /* Default to 'error also when the fluid's value is not one of
+ the valid symbols. */
+ handler = SCM_FAILED_CONVERSION_ERROR;
+ }
+
+ return handler;
+}
+
+/* Use HANDLER as the default conversion strategy for future ports. */
+void
+scm_i_set_default_port_conversion_handler (scm_t_string_failed_conversion_handler
+ handler)
+{
+ SCM strategy;
+
+ if (!scm_conversion_strategy_init
+ || !scm_is_fluid (SCM_VARIABLE_REF (default_conversion_strategy_var)))
+ scm_misc_error (NULL, "tried to set conversion strategy fluid before it is initialized",
+ SCM_EOL);
+
+ switch (handler)
+ {
+ case SCM_FAILED_CONVERSION_ERROR:
+ strategy = sym_error;
+ break;
+
+ case SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE:
+ strategy = sym_escape;
+ break;
+
+ case SCM_FAILED_CONVERSION_QUESTION_MARK:
+ strategy = sym_substitute;
+ break;
+
+ default:
+ abort ();
+ }
+
+ scm_fluid_set_x (SCM_VARIABLE_REF (default_conversion_strategy_var),
+ strategy);
+}
+
static void
-finalize_iconv_descriptors (GC_PTR ptr, GC_PTR data)
+finalize_iconv_descriptors (void *ptr, void *data)
{
close_iconv_descriptors (ptr);
}
}
#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_init
- || !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"
SCM_VALIDATE_OPPORT (1, port);
- if (!scm_is_false (port))
+ if (scm_is_false (port))
+ h = scm_i_default_port_conversion_handler ();
+ else
{
+ scm_t_port *pt;
+
SCM_VALIDATE_OPPORT (1, port);
+ pt = SCM_PTAB_ENTRY (port);
+
+ h = pt->ilseq_handler;
}
- 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)
"this thread.\n")
#define FUNC_NAME s_scm_set_port_conversion_strategy_x
{
- SCM err;
- SCM qm;
- SCM esc;
+ scm_t_string_failed_conversion_handler handler;
- 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;
- }
+ if (scm_is_eq (sym, sym_error))
+ handler = SCM_FAILED_CONVERSION_ERROR;
+ else if (scm_is_eq (sym, sym_substitute))
+ handler = SCM_FAILED_CONVERSION_QUESTION_MARK;
+ else if (scm_is_eq (sym, sym_escape))
+ handler = SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE;
+ else
+ SCM_MISC_ERROR ("unknown conversion strategy ~s", scm_list_1 (sym));
- esc = scm_from_latin1_symbol ("escape");
- if (scm_is_true (scm_eqv_p (sym, esc)))
+ if (scm_is_false (port))
+ scm_i_set_default_port_conversion_handler (handler);
+ else
{
- scm_i_set_conversion_strategy_x (port,
- SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE);
- return SCM_UNSPECIFIED;
+ SCM_VALIDATE_OPPORT (1, port);
+ SCM_PTAB_ENTRY (port)->ilseq_handler = handler;
}
- SCM_MISC_ERROR ("unknown conversion behavior ~s", scm_list_1 (sym));
-
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
return ret;
}
-/* move up to read_len chars from port's putback and/or read buffers
- into memory starting at dest. returns the number of chars moved. */
+/* Move up to READ_LEN bytes from PORT's putback and/or read buffers
+ into memory starting at DEST. Return the number of bytes moved.
+ PORT's line/column numbers are left unchanged. */
size_t
scm_take_from_input_buffers (SCM port, char *dest, size_t read_len)
{
scm_t_port *pt = SCM_PTAB_ENTRY (port);
- size_t chars_read = 0;
+ size_t bytes_read = 0;
size_t from_buf = min (pt->read_end - pt->read_pos, read_len);
if (from_buf > 0)
{
memcpy (dest, pt->read_pos, from_buf);
pt->read_pos += from_buf;
- chars_read += from_buf;
+ bytes_read += from_buf;
read_len -= from_buf;
dest += from_buf;
}
{
memcpy (dest, pt->saved_read_pos, from_buf);
pt->saved_read_pos += from_buf;
- chars_read += from_buf;
+ bytes_read += from_buf;
}
}
- return chars_read;
+
+ return bytes_read;
}
/* Clear a port's read buffers, returning the contents. */
scm_make_fluid_with_default (SCM_BOOL_F));
scm_port_encoding_init = 1;
- SCM_VARIABLE_SET (scm_conversion_strategy,
- scm_make_fluid_with_default
- (scm_from_int ((int) SCM_FAILED_CONVERSION_QUESTION_MARK)));
+ SCM_VARIABLE_SET (default_conversion_strategy_var,
+ scm_make_fluid_with_default (sym_substitute));
scm_conversion_strategy_init = 1;
-
+
/* These bindings are used when boot-9 turns `current-input-port' et
al into parameters. They are then removed from the guile module. */
scm_c_define ("%current-input-port-fluid", cur_inport_fluid);
HCoop / bpt / guile.git / blobdiff