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The data size in bytes is now stored in the header of a column.

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This commit is contained in:
Celine Mercier
2015-11-09 15:55:00 +01:00
parent 65c1b1e8b2
commit 01bfc14503
2 changed files with 19 additions and 24 deletions
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27
src/obidmscolumn.c
View File

@ -733,6 +733,7 @@ OBIDMS_column_p obi_create_column(OBIDMS_p dms,
header = new_column->header;
header->little_endian = obi_is_little_endian();
header->header_size = header_size;
header->data_size = data_size;
header->line_count = nb_lines;
header->lines_used = 0;
header->nb_elements_per_line = nb_elements_per_line;
@ -781,7 +782,6 @@ OBIDMS_column_p obi_open_column(OBIDMS_p dms,
char* column_file_name;
int column_file_descriptor;
size_t header_size;
size_t data_size;
column = NULL;
@ -856,12 +856,9 @@ OBIDMS_column_p obi_open_column(OBIDMS_p dms,
return NULL;
}
// Compute data size from the informations in the header
data_size = obi_array_sizeof((column->header)->data_type, (column->header)->line_count, (column->header)->nb_elements_per_line);
// Map the data
column->data = mmap(NULL,
data_size,
(column->header)->data_size,
PROT_READ,
MAP_PRIVATE,
column_file_descriptor,
@ -910,7 +907,6 @@ OBIDMS_column_p obi_clone_column(OBIDMS_p dms,
OBIDMS_column_p new_column;
index_t nb_lines;
index_t nb_elements_per_line;
size_t data_size;
OBIType_t data_type;
column_to_clone = obi_open_column(dms, column_name, version_number);
@ -953,8 +949,7 @@ OBIDMS_column_p obi_clone_column(OBIDMS_p dms,
if (clone_data)
{
data_size = obi_array_sizeof(data_type, nb_lines, nb_elements_per_line);
memcpy(new_column->data, column_to_clone->data, data_size);
memcpy(new_column->data, column_to_clone->data, (column_to_clone->header)->data_size);
(new_column->header)->lines_used = (column_to_clone->header)->lines_used;
}
@ -971,11 +966,8 @@ OBIDMS_column_p obi_clone_column(OBIDMS_p dms,
int obi_close_column(OBIDMS_column_p column)
{
size_t data_size;
// Munmap data
data_size = obi_array_sizeof((column->header)->data_type, (column->header)->line_count, (column->header)->nb_elements_per_line);
if (munmap(column->data, data_size) < 0)
if (munmap(column->data, (column->header)->data_size) < 0)
{
obi_set_errno(OBICOL_UNKNOWN_ERROR);
obidebug(1, "\nError munmapping column data");
@ -1035,8 +1027,7 @@ int obi_truncate_column_to_lines_used(OBIDMS_column_p column) // TODO is it nece
free(column_file_name);
// Unmap the data before truncating the file
data_size = obi_array_sizeof((column->header)->data_type, (column->header)->line_count, (column->header)->nb_elements_per_line);
if (munmap(column->data, data_size) < 0)
if (munmap(column->data, (column->header)->data_size) < 0)
{
obi_set_errno(OBICOL_UNKNOWN_ERROR);
obidebug(1, "\nError munmapping the data of a column before truncating");
@ -1072,8 +1063,9 @@ int obi_truncate_column_to_lines_used(OBIDMS_column_p column) // TODO is it nece
return -1;
}
// Set line_count to the new line count
// Set new line_count and new data size
(column->header)->line_count = new_line_count;
(column->header)->data_size = data_size;
close(column_file_descriptor);
@ -1123,7 +1115,7 @@ int obi_enlarge_column(OBIDMS_column_p column)
close(column_file_descriptor);
return -1;
}
old_data_size = obi_array_sizeof((column->header)->data_type, old_line_count, (column->header)->nb_elements_per_line);
old_data_size = (column->header)->data_size;
new_data_size = old_data_size * COLUMN_GROWTH_FACTOR;
header_size = (column->header)->header_size;
file_size = header_size + new_data_size;
@ -1185,8 +1177,9 @@ int obi_enlarge_column(OBIDMS_column_p column)
}
}
// Set new line count
// Set new line count and new data size
(column->header)->line_count = new_line_count;
(column->header)->data_size = new_data_size;
// Initialize new data lines to NA
obi_ini_to_NA_values(column, old_line_count, new_line_count - old_line_count);

2
src/obidmscolumn.h
View File

@ -55,6 +55,8 @@ typedef struct OBIDMS_column_header {
*/
size_t header_size; /**< Size of the header in bytes.
*/
size_t data_size; /**< Size of the data in bytes.
*/
index_t line_count; /**< Number of lines of data allocated.
*/
index_t lines_used; /**< Number of lines of data used.