\f
+#include <uniconv.h>
#include "libguile/__scm.h"
\f
Internal, low level interface to the character arrays
- - Use scm_i_string_chars to get a pointer to the byte array of a
- string for reading. Use scm_i_string_length to get the number of
- bytes in that array. The array is not null-terminated.
+ - Use scm_is_narrow_string to determine is the string is narrow or
+ wide.
+
+ - Use scm_i_string_chars or scm_i_string_wide_chars to get a
+ pointer to the byte or scm_t_wchar array of a string for reading.
+ Use scm_i_string_length to get the number of characters in that
+ array. The array is not null-terminated.
- The array is valid as long as the corresponding SCM object is
protected but only until the next SCM_TICK. During such a 'safe
point', strings might change their representation.
- - Use scm_i_string_writable_chars to get the same pointer as with
- scm_i_string_chars, but for reading and writing. This is a
- potentially costly operation since it implements the
- copy-on-write behavior. When done with the writing, call
- scm_i_string_stop_writing. You must do this before the next
- SCM_TICK. (This means, before calling almost any other scm_
- function and you can't allow throws, of course.)
-
- - New strings can be created with scm_i_make_string. This gives
- access to a writable pointer that remains valid as long as nobody
- else makes a copy-on-write substring of the string. Do not call
- scm_i_string_stop_writing for this pointer.
+ - Use scm_i_string_start_writing to get a version of the string
+ ready for reading and writing. This is a potentially costly
+ operation since it implements the copy-on-write behavior. When
+ done with the writing, call scm_i_string_stop_writing. You must
+ do this before the next SCM_TICK. (This means, before calling
+ almost any other scm_ function and you can't allow throws, of
+ course.)
+
+ - New strings can be created with scm_i_make_string or
+ scm_i_make_wide_string. This gives access to a writable pointer
+ that remains valid as long as nobody else makes a copy-on-write
+ substring of the string. Do not call scm_i_string_stop_writing
+ for this pointer.
+
+ - Alternately, scm_i_string_ref and scm_i_string_set_x can be used
+ to read and write strings without worrying about whether the
+ string is narrow or wide. scm_i_string_set_x still needs to be
+ bracketed by scm_i_string_start_writing and
+ scm_i_string_stop_writing.
Legacy interface
- SCM_STRING_CHARS uses scm_i_string_writable_chars and immediately
calls scm_i_stop_writing, hoping for the best. SCM_STRING_LENGTH
is the same as scm_i_string_length. SCM_STRING_CHARS will throw
- an error for for strings that are not null-terminated.
+ an error for for strings that are not null-terminated. There is
+ no wide version of this interface.
*/
SCM_API SCM scm_string_p (SCM x);
SCM_API SCM scm_string (SCM chrs);
SCM_API SCM scm_make_string (SCM k, SCM chr);
SCM_API SCM scm_string_length (SCM str);
+SCM_API SCM scm_string_width (SCM str);
SCM_API SCM scm_string_ref (SCM str, SCM k);
SCM_API SCM scm_string_set_x (SCM str, SCM k, SCM chr);
SCM_API SCM scm_substring (SCM str, SCM start, SCM end);
SCM_API SCM scm_take_locale_stringn (char *str, size_t len);
SCM_API char *scm_to_locale_string (SCM str);
SCM_API char *scm_to_locale_stringn (SCM str, size_t *lenp);
+SCM_INTERNAL char *scm_to_stringn (SCM str, size_t *lenp,
+ const char *encoding,
+ enum iconv_ilseq_handler handler);
SCM_API size_t scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len);
SCM_API SCM scm_makfromstrs (int argc, char **argv);
/* internal accessor functions. Arguments must be valid. */
SCM_INTERNAL SCM scm_i_make_string (size_t len, char **datap);
+SCM_INTERNAL SCM scm_i_make_wide_string (size_t len, scm_t_wchar **datap);
SCM_INTERNAL SCM scm_i_substring (SCM str, size_t start, size_t end);
SCM_INTERNAL SCM scm_i_substring_read_only (SCM str, size_t start, size_t end);
SCM_INTERNAL SCM scm_i_substring_shared (SCM str, size_t start, size_t end);
SCM_INTERNAL SCM scm_i_substring_copy (SCM str, size_t start, size_t end);
SCM_INTERNAL size_t scm_i_string_length (SCM str);
SCM_API /* FIXME: not internal */ const char *scm_i_string_chars (SCM str);
+SCM_API const scm_t_wchar *scm_i_string_wide_chars (SCM str);
SCM_API /* FIXME: not internal */ char *scm_i_string_writable_chars (SCM str);
+SCM_INTERNAL SCM scm_i_string_start_writing (SCM str);
SCM_INTERNAL void scm_i_string_stop_writing (void);
-
+SCM_INTERNAL int scm_i_is_narrow_string (SCM str);
+SCM_INTERNAL scm_t_wchar scm_i_string_ref (SCM str, size_t x);
+SCM_INTERNAL void scm_i_string_set_x (SCM str, size_t p, scm_t_wchar chr);
/* internal functions related to symbols. */
SCM_INTERNAL SCM scm_i_make_symbol (SCM name, scm_t_bits flags,
scm_i_c_take_symbol (char *name, size_t len,
scm_t_bits flags, unsigned long hash, SCM props);
SCM_INTERNAL const char *scm_i_symbol_chars (SCM sym);
+SCM_INTERNAL const scm_t_wchar *scm_i_symbol_wide_chars (SCM sym);
SCM_INTERNAL size_t scm_i_symbol_length (SCM sym);
+SCM_INTERNAL int scm_i_is_narrow_symbol (SCM str);
SCM_INTERNAL SCM scm_i_symbol_substring (SCM sym, size_t start, size_t end);
+SCM_INTERNAL scm_t_wchar scm_i_symbol_ref (SCM sym, size_t x);
/* internal GC functions. */
HCoop / bpt / guile.git / blobdiff