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gmio_stl/internal: improve STL ascii output implementation

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This commit is contained in:
Hugues Delorme 2015-10-28 16:38:57 +01:00
parent 39132c0b3f
commit 64e2456728
1 changed files with 40 additions and 41 deletions
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81
src/gmio_stl/internal/stla_write.c
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@ -50,13 +50,7 @@ enum { GMIO_STLA_FACET_SIZE = 321 };
enum { GMIO_STLA_FACET_SIZE_P2 = 512 };
enum { GMIO_STLA_SOLID_NAME_MAX_LEN = 512 };
GMIO_INLINE char* gmio_write_string(char* buffer, const char* str)
{
const char* safe_str = str != NULL ? str : "";
const size_t len = strlen(safe_str);
strncpy(buffer, safe_str, len);
return buffer + len;
}
/* Fucntions for raw strings(ie. "const char*") */
GMIO_INLINE char* gmio_write_eol(char* buffer)
{
@ -64,24 +58,30 @@ GMIO_INLINE char* gmio_write_eol(char* buffer)
return buffer + 1;
}
GMIO_INLINE char* gmio_write_string_eol(char* buffer, const char* str)
GMIO_INLINE char* gmio_write_rawstr(char* buffer, const char* str)
{
buffer = gmio_write_string(buffer, str);
return gmio_write_eol(buffer);
/* pre-condition: str must not be NULL */
#if 0
const size_t len = strlen(str);
strncpy(buffer, str, len);
return buffer + len;
#else
/* Not that good :
* the compiler cannot optimize copy for the target architecture
*/
while (*str != 0) {
*buffer = *str;
++buffer;
++str;
}
return buffer;
#endif
}
/*static char* gmio_write_space(char* buffer)
GMIO_INLINE char* gmio_write_rawstr_eol(char* buffer, const char* str)
{
*buffer = ' ';
return buffer + 1;
}*/
GMIO_INLINE char* gmio_write_nspaces(char* buffer, int n)
{
const int offset = n;
while (n > 0)
*(buffer + (--n)) = ' ';
return buffer + offset;
buffer = gmio_write_rawstr(buffer, str);
return gmio_write_eol(buffer);
}
GMIO_INLINE char gmio_float_text_format_to_specifier(
@ -120,7 +120,8 @@ GMIO_INLINE char* gmio_write_coords(
coords_format, coords->x, coords->y, coords->z);
}
static gmio_bool_t gmio_transfer_flush_buffer(gmio_transfer_t* trsf, size_t n)
GMIO_INLINE gmio_bool_t gmio_transfer_flush_buffer(
gmio_transfer_t* trsf, size_t n)
{
const size_t write_count =
gmio_stream_write(&trsf->stream, trsf->memblock.ptr, sizeof(char), n);
@ -130,7 +131,7 @@ static gmio_bool_t gmio_transfer_flush_buffer(gmio_transfer_t* trsf, size_t n)
int gmio_stla_write(
gmio_transfer_t* trsf,
const gmio_stl_mesh_t* mesh,
const gmio_stl_write_options_t *options)
const gmio_stl_write_options_t* options)
{
/* Constants */
const uint32_t total_facet_count = mesh != NULL ? mesh->triangle_count : 0;
@ -138,8 +139,10 @@ int gmio_stla_write(
trsf != NULL ?
gmio_size_to_uint32(trsf->memblock.size / GMIO_STLA_FACET_SIZE_P2)
: 0;
const char* solid_name =
const char* opt_solid_name =
options != NULL ? options->stla_solid_name : NULL;
const char* solid_name =
opt_solid_name != NULL ? opt_solid_name : "";
const gmio_float_text_format_t float32_format =
options != NULL ?
options->stla_float32_format :
@ -170,9 +173,9 @@ int gmio_stla_write(
gmio_float_text_format_to_specifier(float32_format);
char* it = coords_format;
it = gmio_write_stdio_format(it, float32_specifier, float32_prec);
it = gmio_write_nspaces(it, 2);
it = gmio_write_rawstr(it, " ");
it = gmio_write_stdio_format(it, float32_specifier, float32_prec);
it = gmio_write_nspaces(it, 2);
it = gmio_write_rawstr(it, " ");
it = gmio_write_stdio_format(it, float32_specifier, float32_prec);
*it = 0; /* Write terminating null byte */
/* TODO: check the "format" string can contain the given precision */
@ -180,8 +183,8 @@ int gmio_stla_write(
/* Write solid declaration */
if (!write_triangles_only) {
buffc = gmio_write_string(buffc, "solid ");
buffc = gmio_write_string_eol(buffc, solid_name);
buffc = gmio_write_rawstr(buffc, "solid ");
buffc = gmio_write_rawstr_eol(buffc, solid_name);
if (!gmio_transfer_flush_buffer(trsf, buffc - (char*)mblock_ptr))
return GMIO_ERROR_STREAM;
}
@ -208,23 +211,19 @@ int gmio_stla_write(
++ibuffer_facet)
{
func_get_triangle(mesh_cookie, ibuffer_facet, &tri);
buffc = gmio_write_string(buffc, "facet normal ");
buffc = gmio_write_rawstr(buffc, "facet normal ");
buffc = gmio_write_coords(buffc, coords_format, &tri.normal);
buffc = gmio_write_eol(buffc);
buffc = gmio_write_string_eol(buffc, "outer loop");
buffc = gmio_write_string(buffc, " vertex ");
buffc = gmio_write_rawstr(buffc, "\nouter loop");
buffc = gmio_write_rawstr(buffc, "\n vertex ");
buffc = gmio_write_coords(buffc, coords_format, &tri.v1);
buffc = gmio_write_eol(buffc);
buffc = gmio_write_string(buffc, " vertex ");
buffc = gmio_write_rawstr(buffc, "\n vertex ");
buffc = gmio_write_coords(buffc, coords_format, &tri.v2);
buffc = gmio_write_eol(buffc);
buffc = gmio_write_string(buffc, " vertex ");
buffc = gmio_write_rawstr(buffc, "\n vertex ");
buffc = gmio_write_coords(buffc, coords_format, &tri.v3);
buffc = gmio_write_eol(buffc);
buffc = gmio_write_string_eol(buffc, "endloop");
buffc = gmio_write_rawstr(buffc, "\nendloop");
buffc = gmio_write_string_eol(buffc, "endfacet");
buffc = gmio_write_rawstr(buffc, "\nendfacet\n");
} /* end for (ibuffer_facet) */
if (!gmio_transfer_flush_buffer(trsf, buffc - (char*)mblock_ptr))
@ -237,8 +236,8 @@ int gmio_stla_write(
/* Write end of solid */
if (gmio_no_error(error) && !write_triangles_only) {
buffc = gmio_write_string(trsf->memblock.ptr, "endsolid ");
buffc = gmio_write_string_eol(buffc, solid_name);
buffc = gmio_write_rawstr(trsf->memblock.ptr, "endsolid ");
buffc = gmio_write_rawstr_eol(buffc, solid_name);
if (!gmio_transfer_flush_buffer(trsf, buffc - (char*)mblock_ptr))
error = GMIO_ERROR_STREAM;
}