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Use configure-time constant for the host's endianness

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This commit is contained in:
Hugues Delorme 2015-03-20 08:53:20 +01:00
parent d4019706a8
commit 828f970da5
5 changed files with 20 additions and 9 deletions
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5
CMakeLists.txt
View File

@ -35,6 +35,11 @@ set(ALL_SRC_FILES ${ALL_SRC_FILES})
# Find bit size of the target architecture
math(EXPR GMIO_TARGET_ARCH_BIT_SIZE "8 * ${CMAKE_SIZEOF_VOID_P}")
# Test if host's architecture is big-endian
include(TestBigEndian)
test_big_endian(GMIO_HOST_IS_BIG_ENDIAN)
# Find available C99 features
if(NOT BUILD_STRICT_C90)
# Have <stdint.h> ?
check_include_files(stdint.h GMIO_HAVE_STDINT_H)

2
src/gmio_core/config.h.cmake
View File

@ -27,6 +27,8 @@
#cmakedefine GMIO_HAVE_MSVC_BUILTIN_BSWAP_FUNC
#cmakedefine GMIO_HOST_IS_BIG_ENDIAN
#if defined(__APPLE__)
# if defined(__i386__) || defined(__ppc__)
# define GMIO_TARGET_ARCH_BIT_SIZE 32

8
src/gmio_core/endian.h
View File

@ -33,6 +33,14 @@ enum gmio_endianness
typedef enum gmio_endianness gmio_endianness_t;
enum {
#ifdef GMIO_HOST_IS_BIG_ENDIAN
GMIO_HOST_ENDIANNESS = GMIO_BIG_ENDIAN
#else
GMIO_HOST_ENDIANNESS = GMIO_LITTLE_ENDIAN
#endif
};
GMIO_C_LINKAGE_BEGIN
/*! Returns endianness (byte order) of the host's CPU architecture */

8
src/gmio_stl/stlb_read.c
View File

@ -72,10 +72,8 @@ int gmio_stlb_read(
const gmio_stlb_read_options_t* options)
{
/* Constants */
const gmio_endianness_t host_byte_order =
gmio_host_endianness();
const gmio_endianness_t byte_order =
options != NULL ? options->byte_order : host_byte_order;
options != NULL ? options->byte_order : GMIO_HOST_ENDIANNESS;
const uint32_t max_facet_count_per_read =
trsf != NULL ?
gmio_size_to_uint32(
@ -92,7 +90,7 @@ int gmio_stlb_read(
return error;
/* Initialize rparams */
if (host_byte_order != byte_order)
if (byte_order != GMIO_HOST_ENDIANNESS)
rparams.fix_endian_func = gmio_stl_triangle_bswap;
/* Read header */
@ -107,7 +105,7 @@ int gmio_stlb_read(
return GMIO_STLB_READ_FACET_COUNT_ERROR;
memcpy(&total_facet_count, trsf->buffer, sizeof(uint32_t));
if (host_byte_order != byte_order)
if (byte_order != GMIO_HOST_ENDIANNESS)
total_facet_count = gmio_uint32_bswap(total_facet_count);
/* Callback to notify triangle count and header data */

6
src/gmio_stl/stlb_write.c
View File

@ -73,10 +73,8 @@ int gmio_stlb_write(
const gmio_stlb_write_options_t* options)
{
/* Constants */
const gmio_endianness_t host_byte_order =
gmio_host_endianness();
const gmio_endianness_t byte_order =
options != NULL ? options->byte_order : host_byte_order;
options != NULL ? options->byte_order : GMIO_HOST_ENDIANNESS;
const uint8_t* header_data =
options != NULL ? options->header_data : NULL;
const uint32_t facet_count =
@ -93,7 +91,7 @@ int gmio_stlb_write(
return error;
/* Initialize wparams */
if (host_byte_order != byte_order)
if (byte_order != GMIO_HOST_ENDIANNESS)
wparams.fix_endian_func = gmio_stl_triangle_bswap;
wparams.facet_count = gmio_size_to_uint32(
trsf->buffer_size / GMIO_STLB_TRIANGLE_RAWSIZE);