gmio_stl: faster(2x) version of gmio_stla_infos_get()
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Hugues Delorme
parent
78ecd577dc
commit
5605934628
@ -15,6 +15,183 @@
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#include "stla_infos_get.h"
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#include "../../gmio_core/error.h"
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#include "../../gmio_core/internal/min_max.h"
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#include "../../gmio_core/internal/stringstream.h"
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#include "../stl_error.h"
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#include "stla_parsing.h"
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#include "stl_rw_common.h"
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#include <string.h>
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static const char* gmio_stringstream_skip_until_ascii_space(
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struct gmio_stringstream* sstream)
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{
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const char* curr_char = gmio_stringstream_current_char(sstream);
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while (curr_char != NULL && !gmio_ascii_isspace(*curr_char))
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curr_char = gmio_stringstream_next_char(sstream);
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return curr_char;
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}
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static const char* gmio_stringstream_skip_word(
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struct gmio_stringstream* sstream)
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{
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gmio_stringstream_skip_ascii_spaces(sstream);
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return gmio_stringstream_skip_until_ascii_space(sstream);
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}
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static void gmio_skip_xyz_coords(struct gmio_stla_parse_data* data)
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{
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struct gmio_stringstream* sstream = &data->strstream;
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gmio_stringstream_skip_word(sstream);
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gmio_stringstream_skip_word(sstream);
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gmio_stringstream_skip_word(sstream);
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data->strbuff.len = 0;
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data->token = unknown_token;
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}
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static int gmio_skip_facet(struct gmio_stla_parse_data* data)
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{
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int errc = 0;
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if (data->token != FACET_token)
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errc += gmio_stla_eat_next_token_inplace(data, FACET_token);
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errc += gmio_stringstream_skip_word(&data->strstream) == NULL; /* normal */
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gmio_skip_xyz_coords(data);
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errc += gmio_stringstream_skip_word(&data->strstream) == NULL; /* outer */
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errc += gmio_stringstream_skip_word(&data->strstream) == NULL; /* loop */
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errc += gmio_stringstream_skip_word(&data->strstream) == NULL; /* vertex */
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gmio_skip_xyz_coords(data);
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errc += gmio_stringstream_skip_word(&data->strstream) == NULL; /* vertex */
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gmio_skip_xyz_coords(data);
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errc += gmio_stringstream_skip_word(&data->strstream) == NULL; /* vertex */
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gmio_skip_xyz_coords(data);
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errc += gmio_stringstream_skip_word(&data->strstream) == NULL; /* endloop */
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errc += gmio_stringstream_skip_word(&data->strstream) == NULL; /* endfacet */
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return errc;
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}
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static int gmio_stla_check_next_token(
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struct gmio_stringstream* sstream, const char* expected_token_str)
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{
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const char* stream_char = NULL;
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stream_char = gmio_stringstream_skip_ascii_spaces(sstream);
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for (;;) {
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if (stream_char == NULL || gmio_ascii_isspace(*stream_char)) {
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if (*expected_token_str == 0)
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return 1;
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break;
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}
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else if (!gmio_ascii_char_iequals(*stream_char, *expected_token_str)
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|| *expected_token_str == 0)
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{
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break;
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}
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stream_char = gmio_stringstream_next_char(sstream);
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++expected_token_str;
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}
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gmio_stringstream_skip_word(sstream);
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return 0;
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}
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static void gmio_stringstream_stla_read_hook(
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void* cookie, const struct gmio_string* strbuff)
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{
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struct gmio_stringstream_stla_cookie* tcookie =
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(struct gmio_stringstream_stla_cookie*)(cookie);
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if (tcookie != NULL)
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tcookie->stream_offset += strbuff->len;
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}
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int gmio_stla_infos_get(
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struct gmio_stl_infos_get_args* args, unsigned flags)
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{
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const gmio_bool_t flag_facet_count =
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(flags & GMIO_STL_INFO_FLAG_FACET_COUNT) != 0;
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const gmio_bool_t flag_size =
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(flags & GMIO_STL_INFO_FLAG_SIZE) != 0;
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const gmio_bool_t flag_stla_solidname =
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(flags & GMIO_STLA_INFO_FLAG_SOLIDNAME) != 0;
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struct gmio_stl_infos* infos = &args->infos;
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void* const mblock_ptr = args->stream_memblock.ptr;
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/* Leave one byte to end the string buffer with 0 */
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const size_t mblock_size = args->stream_memblock.size - 1;
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struct gmio_stla_parse_data parse_data = {0};
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struct gmio_stringstream* sstream = &parse_data.strstream;
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struct gmio_string* strbuff = &parse_data.strbuff;
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char fixed_buffer[GMIO_STLA_READ_STRING_MAX_LEN];
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int err = GMIO_ERROR_OK;
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if (flags == 0)
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return err;
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if (!gmio_check_memblock(&err, &args->stream_memblock))
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return err;
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parse_data.strstream =
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gmio_stringstream(
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args->stream,
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gmio_string(mblock_ptr, 0, mblock_size));
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parse_data.strstream.func_stream_read_hook = gmio_stringstream_stla_read_hook;
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parse_data.strbuff = gmio_string(fixed_buffer, 0, sizeof(fixed_buffer));
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gmio_stringstream_skip_word(sstream); /* Skip "\s*solid" */
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gmio_stla_parse_solidname_beg(&parse_data);
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if (flag_stla_solidname) {
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const size_t name_len_for_cpy =
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GMIO_MIN(infos->stla_solidname_maxlen, strbuff->len);
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strncpy(infos->stla_solidname, strbuff->ptr, name_len_for_cpy);
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/* Null terminate C string */
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if (name_len_for_cpy != 0)
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infos->stla_solidname[name_len_for_cpy - 1] = 0;
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else if (infos->stla_solidname_maxlen != 0)
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infos->stla_solidname[0] = 0;
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gmio_string_clear(strbuff);
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}
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if (flag_facet_count) {
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infos->facet_count = 0;
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while (parse_data.token == FACET_token
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&& !parse_data.error
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&& gmio_stringstream_current_char(sstream) != NULL)
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{
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if (gmio_skip_facet(&parse_data) == 0) {
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++infos->facet_count;
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/* Eat next unknown token */
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strbuff->len = 0;
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gmio_stringstream_eat_word(sstream, strbuff);
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parse_data.token =
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gmio_stla_find_token(strbuff->ptr, strbuff->len);
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}
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}
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}
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if (flag_size) {
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if (flag_facet_count) { /* We should be near "endsolid" token */
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if (parse_data.token != ENDSOLID_token)
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gmio_stla_eat_next_token(&parse_data, ENDSOLID_token);
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}
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else {
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while (!gmio_stla_check_next_token(sstream, "endsolid")
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&& !parse_data.error
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&& gmio_stringstream_current_char(sstream) != NULL)
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{
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}
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}
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infos->size = parse_data.strstream_cookie.stream_offset;
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infos->size += sstream->strbuff_at - strbuff->ptr;
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}
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return err;
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}
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#if 0
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#include "../../gmio_core/error.h"
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#include "../../gmio_core/internal/min_max.h"
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#include "../../gmio_core/internal/string.h"
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@ -148,3 +325,4 @@ int gmio_stla_infos_get(
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return err;
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}
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#endif
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