-/* Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
+/* Copyright (C) 2009, 2010, 2011, 2012, 2014 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 "libguile/bytevectors.h"
#include "libguile/strings.h"
#include "libguile/validate.h"
-#include "libguile/ieee-754.h"
#include "libguile/arrays.h"
#include "libguile/array-handle.h"
#include "libguile/uniform.h"
/* Bytevector type. */
#define SCM_BYTEVECTOR_HEADER_BYTES \
- (SCM_BYTEVECTOR_HEADER_SIZE * sizeof (SCM))
+ (SCM_BYTEVECTOR_HEADER_SIZE * sizeof (scm_t_bits))
#define SCM_BYTEVECTOR_SET_LENGTH(_bv, _len) \
SCM_SET_CELL_WORD_1 ((_bv), (scm_t_bits) (_len))
/* Return a bytevector of size LEN made up of CONTENTS. The area pointed to
by CONTENTS must have been allocated using `scm_gc_malloc ()'. */
SCM
-scm_c_take_bytevector (signed char *contents, size_t len)
+scm_c_take_gc_bytevector (signed char *contents, size_t len)
{
return make_bytevector_from_buffer (len, contents, SCM_ARRAY_ELEMENT_TYPE_VU8);
}
SCM_BYTEVECTOR_SET_LENGTH (bv, c_new_len);
if (SCM_BYTEVECTOR_CONTIGUOUS_P (bv))
- new_bv = PTR2SCM (scm_gc_realloc (SCM2PTR (bv),
- c_len + SCM_BYTEVECTOR_HEADER_BYTES,
- c_new_len + SCM_BYTEVECTOR_HEADER_BYTES,
- SCM_GC_BYTEVECTOR));
+ {
+ signed char *c_bv;
+
+ c_bv = scm_gc_realloc (SCM2PTR (bv),
+ c_len + SCM_BYTEVECTOR_HEADER_BYTES,
+ c_new_len + SCM_BYTEVECTOR_HEADER_BYTES,
+ SCM_GC_BYTEVECTOR);
+ new_bv = PTR2SCM (c_bv);
+ SCM_BYTEVECTOR_SET_CONTENTS (new_bv, c_bv + SCM_BYTEVECTOR_HEADER_BYTES);
+ }
else
{
signed char *c_bv;
signed char c_fill = '\0';
SCM_VALIDATE_UINT_COPY (1, len, c_len);
- if (fill != SCM_UNDEFINED)
+ if (!scm_is_eq (fill, SCM_UNDEFINED))
{
int value;
}
bv = make_bytevector (c_len, SCM_ARRAY_ELEMENT_TYPE_VU8);
- if (fill != SCM_UNDEFINED)
+ if (!scm_is_eq (fill, SCM_UNDEFINED))
{
unsigned i;
signed char *contents;
if (SCM_UNLIKELY (c_target_start + c_len > c_target_len))
scm_out_of_range (FUNC_NAME, target_start);
- memcpy (c_target + c_target_start,
- c_source + c_source_start,
- c_len);
+ memmove (c_target + c_target_start,
+ c_source + c_source_start,
+ c_len);
return SCM_UNSPECIFIED;
}
\
SCM_VALIDATE_BYTEVECTOR (1, bv); \
SCM_VALIDATE_SYMBOL (2, endianness); \
- c_size = scm_to_uint (size); \
+ c_size = scm_to_unsigned_integer (size, 1, (size_t) -1); \
\
c_len = SCM_BYTEVECTOR_LENGTH (bv); \
- if (SCM_UNLIKELY (c_len == 0)) \
+ if (SCM_UNLIKELY (c_len < c_size)) \
lst = SCM_EOL; \
- else if (SCM_UNLIKELY (c_len < c_size)) \
- scm_out_of_range (FUNC_NAME, size); \
else \
{ \
const char *c_bv; \
\
c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
\
- lst = scm_make_list (scm_from_uint (c_len / c_size), \
+ lst = scm_make_list (scm_from_size_t (c_len / c_size), \
SCM_UNSPECIFIED); \
for (i = 0, pair = lst; \
i <= c_len - c_size; \
Section 2.1 of R6RS-lib (in response to
http://www.r6rs.org/formal-comments/comment-187.txt). */
+union scm_ieee754_float
+{
+ float f;
+ scm_t_uint32 i;
+};
+
+union scm_ieee754_double
+{
+ double d;
+ scm_t_uint64 i;
+};
+
/* Convert to/from a floating-point number with different endianness. This
method is probably not the most efficient but it should be portable. */
float_to_foreign_endianness (union scm_ieee754_float *target,
float source)
{
- union scm_ieee754_float src;
-
- src.f = source;
+ union scm_ieee754_float input;
-#ifdef WORDS_BIGENDIAN
- /* Assuming little endian for both byte and word order. */
- target->little_endian.negative = src.big_endian.negative;
- target->little_endian.exponent = src.big_endian.exponent;
- target->little_endian.mantissa = src.big_endian.mantissa;
-#else
- target->big_endian.negative = src.little_endian.negative;
- target->big_endian.exponent = src.little_endian.exponent;
- target->big_endian.mantissa = src.little_endian.mantissa;
-#endif
+ input.f = source;
+ target->i = bswap_32 (input.i);
}
static inline float
{
union scm_ieee754_float result;
-#ifdef WORDS_BIGENDIAN
- /* Assuming little endian for both byte and word order. */
- result.big_endian.negative = source->little_endian.negative;
- result.big_endian.exponent = source->little_endian.exponent;
- result.big_endian.mantissa = source->little_endian.mantissa;
-#else
- result.little_endian.negative = source->big_endian.negative;
- result.little_endian.exponent = source->big_endian.exponent;
- result.little_endian.mantissa = source->big_endian.mantissa;
-#endif
+ result.i = bswap_32 (source->i);
return (result.f);
}
double_to_foreign_endianness (union scm_ieee754_double *target,
double source)
{
- union scm_ieee754_double src;
+ union scm_ieee754_double input;
- src.d = source;
-
-#ifdef WORDS_BIGENDIAN
- /* Assuming little endian for both byte and word order. */
- target->little_little_endian.negative = src.big_endian.negative;
- target->little_little_endian.exponent = src.big_endian.exponent;
- target->little_little_endian.mantissa0 = src.big_endian.mantissa0;
- target->little_little_endian.mantissa1 = src.big_endian.mantissa1;
-#else
- target->big_endian.negative = src.little_little_endian.negative;
- target->big_endian.exponent = src.little_little_endian.exponent;
- target->big_endian.mantissa0 = src.little_little_endian.mantissa0;
- target->big_endian.mantissa1 = src.little_little_endian.mantissa1;
-#endif
+ input.d = source;
+ target->i = bswap_64 (input.i);
}
static inline double
{
union scm_ieee754_double result;
-#ifdef WORDS_BIGENDIAN
- /* Assuming little endian for both byte and word order. */
- result.big_endian.negative = source->little_little_endian.negative;
- result.big_endian.exponent = source->little_little_endian.exponent;
- result.big_endian.mantissa0 = source->little_little_endian.mantissa0;
- result.big_endian.mantissa1 = source->little_little_endian.mantissa1;
-#else
- result.little_little_endian.negative = source->big_endian.negative;
- result.little_little_endian.exponent = source->big_endian.exponent;
- result.little_little_endian.mantissa0 = source->big_endian.mantissa0;
- result.little_little_endian.mantissa1 = source->big_endian.mantissa1;
-#endif
+ result.i = bswap_64 (source->i);
return (result.d);
}
size_t c_strlen, c_utf_len = 0; \
\
SCM_VALIDATE_STRING (1, str); \
- if (endianness == SCM_UNDEFINED) \
+ if (scm_is_eq (endianness, SCM_UNDEFINED)) \
endianness = scm_sym_big; \
else \
SCM_VALIDATE_SYMBOL (2, endianness); \
#define FUNC_NAME s_scm_string_to_utf8
{
SCM utf;
- uint8_t *c_utf;
- size_t c_strlen, c_utf_len = 0;
+ scm_t_uint8 *c_utf;
+ size_t c_utf_len = 0;
SCM_VALIDATE_STRING (1, str);
- c_strlen = scm_i_string_length (str);
- if (scm_i_is_narrow_string (str))
- c_utf = u8_conv_from_encoding ("ISO-8859-1", iconveh_question_mark,
- scm_i_string_chars (str), c_strlen,
- NULL, NULL, &c_utf_len);
- else
- {
- const scm_t_wchar *wbuf = scm_i_string_wide_chars (str);
- c_utf = u32_to_u8 ((const uint32_t *) wbuf, c_strlen, NULL, &c_utf_len);
- }
- if (SCM_UNLIKELY (c_utf == NULL))
- scm_syserror (FUNC_NAME);
- else
- {
- scm_dynwind_begin (0);
- scm_dynwind_free (c_utf);
-
- utf = make_bytevector (c_utf_len, SCM_ARRAY_ELEMENT_TYPE_VU8);
- memcpy (SCM_BYTEVECTOR_CONTENTS (utf), c_utf, c_utf_len);
-
- scm_dynwind_end ();
- }
+ c_utf = (scm_t_uint8 *) scm_to_utf8_stringn (str, &c_utf_len);
+ utf = make_bytevector (c_utf_len, SCM_ARRAY_ELEMENT_TYPE_VU8);
+ memcpy (SCM_BYTEVECTOR_CONTENTS (utf), c_utf, c_utf_len);
+ free (c_utf);
return (utf);
}
}
#undef FUNC_NAME
+static void
+swap_u32 (scm_t_wchar *vals, size_t len)
+{
+ size_t n;
+ for (n = 0; n < len; n++)
+ vals[n] = bswap_32 (vals[n]);
+}
+
SCM_DEFINE (scm_string_to_utf32, "string->utf32",
1, 1, 0,
(SCM str, SCM endianness),
"encoding of @var{str}.")
#define FUNC_NAME s_scm_string_to_utf32
{
- STRING_TO_UTF (32);
+ SCM bv;
+ scm_t_wchar *wchars;
+ size_t wchar_len, bytes_len;
+
+ wchars = scm_to_utf32_stringn (str, &wchar_len);
+ bytes_len = wchar_len * sizeof (scm_t_wchar);
+ if (!scm_is_eq (SCM_UNBNDP (endianness) ? scm_endianness_big : endianness,
+ scm_i_native_endianness))
+ swap_u32 (wchars, wchar_len);
+
+ bv = make_bytevector (bytes_len, SCM_ARRAY_ELEMENT_TYPE_VU8);
+ memcpy (SCM_BYTEVECTOR_CONTENTS (bv), wchars, bytes_len);
+ free (wchars);
+
+ return bv;
}
#undef FUNC_NAME
size_t c_strlen = 0, c_utf_len = 0; \
\
SCM_VALIDATE_BYTEVECTOR (1, utf); \
- if (endianness == SCM_UNDEFINED) \
+ if (scm_is_eq (endianness, SCM_UNDEFINED)) \
endianness = scm_sym_big; \
else \
SCM_VALIDATE_SYMBOL (2, endianness); \
\f
/* Bytevectors as generalized vectors & arrays. */
+#define COMPLEX_ACCESSOR_PROLOGUE(_type) \
+ size_t c_len, c_index; \
+ char *c_bv; \
+ \
+ SCM_VALIDATE_BYTEVECTOR (1, bv); \
+ c_index = scm_to_size_t (index); \
+ \
+ c_len = SCM_BYTEVECTOR_LENGTH (bv); \
+ c_bv = (char *) SCM_BYTEVECTOR_CONTENTS (bv); \
+ \
+ if (SCM_UNLIKELY (c_index + 2 * sizeof (_type) - 1 >= c_len)) \
+ scm_out_of_range (FUNC_NAME, index);
+
+/* Template for native access to complex numbers of type TYPE. */
+#define COMPLEX_NATIVE_REF(_type) \
+ SCM result; \
+ \
+ COMPLEX_ACCESSOR_PROLOGUE (_type); \
+ \
+ { \
+ _type real, imag; \
+ \
+ memcpy (&real, &c_bv[c_index], sizeof (_type)); \
+ memcpy (&imag, &c_bv[c_index + sizeof (_type)], sizeof (_type)); \
+ \
+ result = scm_c_make_rectangular (real, imag); \
+ } \
+ \
+ return result;
static SCM
-bytevector_ref_c32 (SCM bv, SCM idx)
-{ /* FIXME add some checks */
- const float *contents = (const float*)SCM_BYTEVECTOR_CONTENTS (bv);
- size_t i = scm_to_size_t (idx);
- return scm_c_make_rectangular (contents[i/4], contents[i/4 + 1]);
+bytevector_ref_c32 (SCM bv, SCM index)
+#define FUNC_NAME "bytevector_ref_c32"
+{
+ COMPLEX_NATIVE_REF (float);
}
+#undef FUNC_NAME
static SCM
-bytevector_ref_c64 (SCM bv, SCM idx)
-{ /* FIXME add some checks */
- const double *contents = (const double*)SCM_BYTEVECTOR_CONTENTS (bv);
- size_t i = scm_to_size_t (idx);
- return scm_c_make_rectangular (contents[i/8], contents[i/8 + 1]);
+bytevector_ref_c64 (SCM bv, SCM index)
+#define FUNC_NAME "bytevector_ref_c64"
+{
+ COMPLEX_NATIVE_REF (double);
}
+#undef FUNC_NAME
typedef SCM (*scm_t_bytevector_ref_fn)(SCM, SCM);
-const scm_t_bytevector_ref_fn bytevector_ref_fns[SCM_ARRAY_ELEMENT_TYPE_LAST + 1] =
+static const scm_t_bytevector_ref_fn
+bytevector_ref_fns[SCM_ARRAY_ELEMENT_TYPE_LAST + 1] =
{
NULL, /* SCM */
NULL, /* CHAR */
return ref_fn (h->array, byte_index);
}
-/* FIXME add checks!!! */
-static SCM
-bytevector_set_c32 (SCM bv, SCM idx, SCM val)
-{ float *contents = (float*)SCM_BYTEVECTOR_CONTENTS (bv);
- size_t i = scm_to_size_t (idx);
- contents[i/4] = scm_c_real_part (val);
- contents[i/4 + 1] = scm_c_imag_part (val);
+/* Template for native modification of complex numbers of type TYPE. */
+#define COMPLEX_NATIVE_SET(_type) \
+ COMPLEX_ACCESSOR_PROLOGUE (_type); \
+ \
+ { \
+ _type real, imag; \
+ real = scm_c_real_part (value); \
+ imag = scm_c_imag_part (value); \
+ \
+ memcpy (&c_bv[c_index], &real, sizeof (_type)); \
+ memcpy (&c_bv[c_index + sizeof (_type)], &imag, sizeof (_type)); \
+ } \
+ \
return SCM_UNSPECIFIED;
+
+static SCM
+bytevector_set_c32 (SCM bv, SCM index, SCM value)
+#define FUNC_NAME "bytevector_set_c32"
+{
+ COMPLEX_NATIVE_SET (float);
}
+#undef FUNC_NAME
static SCM
-bytevector_set_c64 (SCM bv, SCM idx, SCM val)
-{ double *contents = (double*)SCM_BYTEVECTOR_CONTENTS (bv);
- size_t i = scm_to_size_t (idx);
- contents[i/8] = scm_c_real_part (val);
- contents[i/8 + 1] = scm_c_imag_part (val);
- return SCM_UNSPECIFIED;
+bytevector_set_c64 (SCM bv, SCM index, SCM value)
+#define FUNC_NAME "bytevector_set_c64"
+{
+ COMPLEX_NATIVE_SET (double);
}
+#undef FUNC_NAME
typedef SCM (*scm_t_bytevector_set_fn)(SCM, SCM, SCM);
HCoop / bpt / guile.git / blobdiff