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ascii_parse: simplify cookie function

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This commit is contained in:
Hugues Delorme 2014-01-27 22:57:10 +01:00
parent 013e57e0ff
commit 340ed4f117
3 changed files with 101 additions and 114 deletions
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58
src/internal/ascii_parse.c
View File

@ -4,10 +4,20 @@
#include <errno.h>
#include <stdlib.h>
void foug_ascii_stream_fwd_iterator_init(foug_ascii_stream_fwd_iterator_t *it)
{
/* Trick: declaring the buffer exhausted will actually trigger the first call to
* foug_stream_read() inside foug_next_char()
*/
it->buffer.len = 0;
it->buffer_pos = it->buffer.max_len;
foug_next_char(it);
}
char *foug_current_char(foug_ascii_stream_fwd_iterator_t *it)
{
if (it != NULL && it->buffer_offset < it->buffer_size)
return it->buffer + it->buffer_offset;
if (it != NULL && it->buffer_pos < it->buffer.len)
return it->buffer.ptr + it->buffer_pos;
return NULL;
}
@ -16,35 +26,25 @@ char *foug_next_char(foug_ascii_stream_fwd_iterator_t *it)
if (it == NULL)
return NULL;
if ((it->buffer_offset + 1) < it->buffer_size) {
++(it->buffer_offset);
return it->buffer + it->buffer_offset;
if ((it->buffer_pos + 1) < it->buffer.len) {
++(it->buffer_pos);
return it->buffer.ptr + it->buffer_pos;
}
else {
size_t char_count_read;
if (foug_stream_error(it->stream) != 0 || foug_stream_at_end(it->stream))
return NULL;
/* Read next chunk of data */
char_count_read = foug_stream_read(it->stream, it->buffer, sizeof(char), it->buffer_size);
if (foug_stream_error(it->stream) != 0) {
return NULL;
}
else {
it->buffer_offset = 0;
it->buffer_size = char_count_read;
it->buffer_pos = 0;
it->buffer.len = foug_stream_read(it->stream, it->buffer.ptr, sizeof(char), it->buffer.max_len);
if (foug_stream_error(it->stream) == 0) {
if (it->stream_read_hook != NULL)
it->stream_read_hook(it->cookie, it->buffer, it->buffer_size);
return it->buffer;
it->stream_read_hook(it->cookie, &it->buffer);
return it->buffer.ptr;
}
}
}
void foug_stream_fwd_iterator_init(foug_ascii_stream_fwd_iterator_t *it)
{
it->buffer_offset = it->buffer_size; /* This will cause the first call to foug_stream_read() */
foug_next_char(it);
return NULL;
}
void foug_skip_spaces(foug_ascii_stream_fwd_iterator_t *it)
@ -54,31 +54,31 @@ void foug_skip_spaces(foug_ascii_stream_fwd_iterator_t *it)
curr_char = foug_next_char(it);
}
int foug_eat_string(foug_ascii_stream_fwd_iterator_t *it, foug_ascii_string_buffer_t *str_buffer)
int foug_eat_word(foug_ascii_stream_fwd_iterator_t *it, foug_ascii_string_buffer_t *buffer)
{
const char* stream_curr_char = NULL;
int isspace_res = 0;
size_t i = 0;
if (str_buffer == NULL || str_buffer->data == NULL || str_buffer->max_len == 0)
if (buffer == NULL || buffer->ptr == NULL)
return -1;
str_buffer->len = 0;
buffer->len = 0;
foug_skip_spaces(it);
stream_curr_char = foug_current_char(it);
while (i < str_buffer->max_len && stream_curr_char != NULL && isspace_res == 0) {
while (i < buffer->max_len && stream_curr_char != NULL && isspace_res == 0) {
isspace_res = isspace(*stream_curr_char);
if (isspace_res == 0) {
str_buffer->data[i] = *stream_curr_char;
buffer->ptr[i] = *stream_curr_char;
stream_curr_char = foug_next_char(it);
++i;
}
}
if (i < str_buffer->max_len) {
str_buffer->data[i] = 0; /* End string with null terminator */
str_buffer->len = i ;
if (i < buffer->max_len) {
buffer->ptr[i] = 0; /* End string with terminating null byte */
buffer->len = i;
if (stream_curr_char != NULL || foug_stream_at_end(it->stream))
return 0;
return -2;

25
src/internal/ascii_parse.h
View File

@ -6,27 +6,26 @@
typedef struct
{
foug_stream_t* stream;
char* buffer;
uint32_t buffer_offset;
uint32_t buffer_size;
void* cookie;
void (*stream_read_hook)(void*, const char*, uint32_t);
} foug_ascii_stream_fwd_iterator_t;
char* ptr; /*!< Buffer contents */
size_t len; /*!< Size(length) of current contents */
size_t max_len; /*!< Maximum contents size(length) */
} foug_ascii_string_buffer_t;
typedef struct
{
char* data;
size_t max_len;
size_t len;
} foug_ascii_string_buffer_t;
foug_stream_t* stream;
foug_ascii_string_buffer_t buffer;
size_t buffer_pos; /*!< Position indicator in buffer */
void* cookie;
void (*stream_read_hook)(void*, const foug_ascii_string_buffer_t*);
} foug_ascii_stream_fwd_iterator_t;
void foug_ascii_stream_fwd_iterator_init(foug_ascii_stream_fwd_iterator_t* it);
char* foug_current_char(foug_ascii_stream_fwd_iterator_t* it);
char* foug_next_char(foug_ascii_stream_fwd_iterator_t* it);
void foug_skip_spaces(foug_ascii_stream_fwd_iterator_t* it);
int foug_eat_string(foug_ascii_stream_fwd_iterator_t* it, foug_ascii_string_buffer_t* str_buffer);
int foug_eat_word(foug_ascii_stream_fwd_iterator_t* it, foug_ascii_string_buffer_t* buffer);
int foug_get_real32(const char* str, foug_real32_t* value_ptr);
#endif /* FOUG_INTERNAL_ASCII_PARSE_H */

132
src/libstl/stla_read.c
View File

@ -4,6 +4,7 @@
#include "../internal/ascii_parse.h"
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
/*
@ -59,7 +60,7 @@ typedef struct
size_t stream_data_size;
size_t stream_offset;
foug_bool_t is_stop_requested;
} foug_stream_fwd_iterator_stla_cookie_t;
} _internal_foug_fwd_iterator_cookie_t;
/* foug_stla_token */
typedef enum
@ -83,21 +84,20 @@ typedef struct
{
foug_stla_token_t token;
foug_bool_t error;
foug_ascii_stream_fwd_iterator_t stream_iterator;
foug_stream_fwd_iterator_stla_cookie_t stream_iterator_cookie;
foug_ascii_string_buffer_t string_buffer;
foug_stla_geom_input_t* geom;
foug_ascii_stream_fwd_iterator_t stream_iterator;
_internal_foug_fwd_iterator_cookie_t stream_iterator_cookie;
foug_ascii_string_buffer_t string_buffer;
foug_stla_geom_input_t* geom;
} foug_stla_parse_data_t;
static void foug_stream_fwd_iterator_stla_read_hook(void* cookie,
const char* buffer,
uint32_t buffer_len)
const foug_ascii_string_buffer_t* buffer)
{
foug_stream_fwd_iterator_stla_cookie_t* tcookie = (foug_stream_fwd_iterator_stla_cookie_t*)(cookie);
_internal_foug_fwd_iterator_cookie_t* tcookie = (_internal_foug_fwd_iterator_cookie_t*)(cookie);
if (tcookie != NULL) {
const uint8_t progress_pc = foug_percentage(0, tcookie->stream_data_size, tcookie->stream_offset);
tcookie->is_stop_requested = !foug_task_control_handle_progress(tcookie->task_control, progress_pc);
tcookie->stream_offset += buffer_len;
tcookie->stream_offset += buffer->len;
}
}
@ -110,13 +110,13 @@ foug_bool_t parsing_can_continue(const foug_stla_parse_data_t* data)
static const char* current_token_as_identifier(const foug_stla_parse_data_t* data)
{
return data->token == ID_token ? data->string_buffer.data : "";
return data->token == ID_token ? data->string_buffer.ptr : "";
}
static int get_current_token_as_real32(const foug_stla_parse_data_t* data, foug_real32_t* value)
static int get_current_token_as_real32(const foug_stla_parse_data_t* data, foug_real32_t* value_ptr)
{
if (data->token == FLOAT_token)
return foug_get_real32(data->string_buffer.data, value);
return foug_get_real32(data->string_buffer.ptr, value_ptr);
return -3;
}
@ -128,57 +128,57 @@ static void parsing_error(foug_stla_parse_data_t* data)
static void parsing_advance(foug_stla_parse_data_t* data)
{
const char* str = data->string_buffer.data;
const char* word = data->string_buffer.ptr;
if (!parsing_can_continue(data))
return;
data->token = unknown_token;
if (foug_eat_string(&data->stream_iterator, &data->string_buffer) == 0) {
const size_t str_len = data->string_buffer.len;
if (foug_eat_word(&data->stream_iterator, &data->string_buffer) == 0) {
const size_t word_len = data->string_buffer.len;
if (str_len >= 7 && strncmp(str, "end", 3) == 0) { /* Might be "end..." token */
switch (str[3]) {
if (word_len >= 7 && strncmp(word, "end", 3) == 0) { /* Might be "end..." token */
switch (word[3]) {
case 'f':
if (strcmp(str + 4, "acet") == 0)
if (strcmp(word + 4, "acet") == 0)
data->token = ENDFACET_token;
break;
case 'l':
if (strcmp(str + 4, "oop") == 0)
if (strcmp(word + 4, "oop") == 0)
data->token = ENDLOOP_token;
break;
case 's':
if (strcmp(str + 4, "olid") == 0)
if (strcmp(word + 4, "olid") == 0)
data->token = ENDSOLID_token;
break;
default:
data->token = ID_token;
} /* end switch */
}
else if (str_len >= 4) {
switch (str[0]) {
else if (word_len >= 4) {
switch (word[0]) {
case 'f':
if (strcmp(str + 1, "acet") == 0)
if (strcmp(word + 1, "acet") == 0)
data->token = FACET_token;
break;
case 'l':
if (strcmp(str + 1, "oop") == 0)
if (strcmp(word + 1, "oop") == 0)
data->token = LOOP_token;
break;
case 'n':
if (strcmp(str + 1, "ormal") == 0)
if (strcmp(word + 1, "ormal") == 0)
data->token = NORMAL_token;
break;
case 'o':
if (strcmp(str + 1, "uter") == 0)
if (strcmp(word + 1, "uter") == 0)
data->token = OUTER_token;
break;
case 's':
if (strcmp(str + 1, "olid") == 0)
if (strcmp(word + 1, "olid") == 0)
data->token = SOLID_token;
break;
case 'v':
if (strcmp(str + 1, "ertex") == 0)
if (strcmp(word + 1, "ertex") == 0)
data->token = VERTEX_token;
break;
default:
@ -187,7 +187,7 @@ static void parsing_advance(foug_stla_parse_data_t* data)
}
if (data->token == unknown_token) {
if (str[0] == '+' || str[0] == '-' || isdigit(str[0])) /* Try to guess if it's a float */
if (word[0] == '+' || word[0] == '-' || isdigit(word[0])) /* Try to guess if it's a float */
data->token = FLOAT_token;
else
data->token = ID_token;
@ -302,47 +302,37 @@ static void parse_xyz_coords(foug_stla_parse_data_t* data, foug_stl_coords_t* co
} /* end switch */
}
static void parse_facets(foug_stla_parse_data_t* data, size_t i_facet_offset)
static void parse_facet(foug_stla_parse_data_t* data, foug_stl_triangle_t* facet)
{
if (!parsing_can_continue(data))
return;
parsing_eat_token(FACET_token, data);
parsing_eat_token(NORMAL_token, data);
parse_xyz_coords(data, &facet->normal);
switch (data->token) {
case ENDSOLID_token:
break;
case FACET_token: {
foug_stl_triangle_t facet;
parsing_eat_token(OUTER_token, data);
parsing_eat_token(LOOP_token, data);
parsing_eat_token(FACET_token, data);
parsing_eat_token(NORMAL_token, data);
parse_xyz_coords(data, &facet.normal);
parsing_eat_token(VERTEX_token, data);
parse_xyz_coords(data, &facet->v1);
parsing_eat_token(VERTEX_token, data);
parse_xyz_coords(data, &facet->v2);
parsing_eat_token(VERTEX_token, data);
parse_xyz_coords(data, &facet->v3);
parsing_eat_token(OUTER_token, data);
parsing_eat_token(LOOP_token, data);
parsing_eat_token(ENDLOOP_token, data);
parsing_eat_token(ENDFACET_token, data);
}
parsing_eat_token(VERTEX_token, data);
parse_xyz_coords(data, &facet.v1);
parsing_eat_token(VERTEX_token, data);
parse_xyz_coords(data, &facet.v2);
parsing_eat_token(VERTEX_token, data);
parse_xyz_coords(data, &facet.v3);
static void parse_facets(foug_stla_parse_data_t* data)
{
uint32_t i_facet_offset = 0;
foug_stl_triangle_t facet;
parsing_eat_token(ENDLOOP_token, data);
parsing_eat_token(ENDFACET_token, data);
if (parsing_can_continue(data)
&& data->geom != NULL
&& data->geom->process_triangle_func != NULL)
{
while (data->token == FACET_token && parsing_can_continue(data)) {
parse_facet(data, &facet);
if (data->geom != NULL && data->geom->process_triangle_func != NULL)
data->geom->process_triangle_func(data->geom->cookie, i_facet_offset, &facet);
}
parse_facets(data, i_facet_offset + 1);
break;
++i_facet_offset;
}
default:
parsing_error(data);
} /* end switch */
}
static void parse_solid(foug_stla_parse_data_t* data)
@ -350,13 +340,12 @@ static void parse_solid(foug_stla_parse_data_t* data)
if (!parsing_can_continue(data))
return;
switch (data->token) {
case SOLID_token:
if (data->token == SOLID_token) {
parse_beginsolid(data);
parse_facets(data, 0);
parse_facets(data);
parse_endsolid(data);
break;
default:
}
else {
parsing_error(data);
}
}
@ -386,16 +375,15 @@ int foug_stla_read(foug_stla_geom_input_t* geom,
parse_data.stream_iterator_cookie.is_stop_requested = 0;
parse_data.stream_iterator.stream = &trsf->stream;
parse_data.stream_iterator.buffer = trsf->buffer;
parse_data.stream_iterator.buffer_offset = 0;
parse_data.stream_iterator.buffer_size = trsf->buffer_size;
parse_data.stream_iterator.buffer.ptr = trsf->buffer;
parse_data.stream_iterator.buffer.max_len = trsf->buffer_size;
parse_data.stream_iterator.cookie = &parse_data.stream_iterator_cookie;
parse_data.stream_iterator.stream_read_hook = foug_stream_fwd_iterator_stla_read_hook;
foug_ascii_stream_fwd_iterator_init(&parse_data.stream_iterator);
parse_data.string_buffer.data = fixed_buffer;
parse_data.string_buffer.max_len = FOUG_STLA_READ_STRING_BUFFER_LEN;
parse_data.string_buffer.ptr = &fixed_buffer[0];
parse_data.string_buffer.len = 0;
parse_data.string_buffer.max_len = FOUG_STLA_READ_STRING_BUFFER_LEN;
parse_data.geom = geom;