Vector library - file management (lower level functions) More...
#include <string.h>#include <stdio.h>#include <unistd.h>#include <sys/types.h>#include <sys/stat.h>#include <grass/vector.h>#include <grass/glocale.h>
Go to the source code of this file.
Functions | |
| off_t | dig_ftell (struct gvfile *file) |
| Get struct gvfile position. More... | |
| int | dig_fseek (struct gvfile *file, off_t offset, int whence) |
| Set struct gvfile position. More... | |
| void | dig_rewind (struct gvfile *file) |
| Rewind file position. More... | |
| int | dig_fflush (struct gvfile *file) |
| Flush struct gvfile. More... | |
| size_t | dig_fread (void *ptr, size_t size, size_t nmemb, struct gvfile *file) |
| Read struct gvfile. More... | |
| size_t | dig_fwrite (const void *ptr, size_t size, size_t nmemb, struct gvfile *file) |
| Write struct gvfile. More... | |
| void | dig_file_init (struct gvfile *file) |
| Initialize gvfile strcuture. More... | |
| int | dig_file_load (struct gvfile *file) |
| Load opened struct gvfile to memory. More... | |
| void | dig_file_free (struct gvfile *file) |
| Free struct gvfile. More... | |
Detailed Description
Vector library - file management (lower level functions)
Vector library - portability (lower level functions)
Lower level functions for reading/writing/manipulating vectors.
Note: seems that the time is almost the same for both cases:
- reading from file
- load whole file to memory and read from memory
(C) 2001-2009 by the GRASS Development Team
This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.
Lower level functions for reading/writing/manipulating vectors.
(C) 2001-2009 by the GRASS Development Team
This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.
Definition in file file.c.
Function Documentation
◆ dig_fflush()
| int dig_fflush | ( | struct gvfile * | file | ) |
Flush struct gvfile.
- Parameters
-
file pointer to struct gvfile structure
- Returns
- 0
Definition at line 104 of file file.c.
References gvfile::file, and gvfile::loaded.
Referenced by dig_write_plus_file(), and V1_delete_line_nat().
◆ dig_file_free()
| void dig_file_free | ( | struct gvfile * | file | ) |
Free struct gvfile.
- Parameters
-
file pointer to struct gvfile structure
Definition at line 266 of file file.c.
References gvfile::alloc, G_free(), gvfile::loaded, and gvfile::start.
Referenced by V1_close_nat().
◆ dig_file_init()
| void dig_file_init | ( | struct gvfile * | file | ) |
Initialize gvfile strcuture.
- Parameters
-
[in,out] file pointer to gvfile structure
Definition at line 170 of file file.c.
References G_zero().
Referenced by V1_open_new_nat(), V1_open_old_nat(), Vect_cidx_open(), Vect_open_fidx(), Vect_open_topo(), Vect_save_fidx(), Vect_save_sidx(), and Vect_save_topo().
◆ dig_file_load()
| int dig_file_load | ( | struct gvfile * | file | ) |
◆ dig_fread()
| size_t dig_fread | ( | void * | ptr, |
| size_t | size, | ||
| size_t | nmemb, | ||
| struct gvfile * | file | ||
| ) |
Read struct gvfile.
- Parameters
-
[out] ptr data buffer size buffer size nmemb number of members file pointer to struct gvfile structure
- Returns
- number of read members
Definition at line 124 of file file.c.
References gvfile::current, gvfile::end, gvfile::file, and gvfile::loaded.
Referenced by dig__fread_port_C(), dig__fread_port_D(), dig__fread_port_F(), dig__fread_port_I(), dig__fread_port_L(), dig__fread_port_O(), and dig__fread_port_S().
◆ dig_fseek()
| int dig_fseek | ( | struct gvfile * | file, |
| off_t | offset, | ||
| int | whence | ||
| ) |
Set struct gvfile position.
Start positions:
- SEEK_SET (start)
- SEEK_CUR (current position)
- SEEK_END (end)
- Parameters
-
file pointer to struct gvfile structure offset offset position whence start position
- Returns
- 0 OK
- -1 error
Definition at line 60 of file file.c.
References gvfile::current, gvfile::file, G_fseek(), gvfile::loaded, gvfile::size, and gvfile::start.
Referenced by dig__read_head(), dig__write_head(), dig_load_plus(), dig_Rd_Plus_head(), dig_Rd_spidx_head(), dig_read_cidx(), dig_read_cidx_head(), V1_delete_line_nat(), V1_rewind_nat(), and Vect_coor_info().
◆ dig_ftell()
| off_t dig_ftell | ( | struct gvfile * | file | ) |
Get struct gvfile position.
- Parameters
-
file pointer to struct gvfile structure
- Returns
- current file position
Definition at line 36 of file file.c.
References gvfile::current, gvfile::file, G_ftell(), gvfile::loaded, and gvfile::start.
Referenced by dig__write_head(), dig_Wr_Plus_head(), dig_Wr_spidx_head(), dig_write_areas(), dig_write_cidx(), dig_write_cidx_head(), dig_write_isles(), dig_write_lines(), dig_write_nodes(), V1_read_next_line_nat(), and Vect_coor_info().
◆ dig_fwrite()
| size_t dig_fwrite | ( | const void * | ptr, |
| size_t | size, | ||
| size_t | nmemb, | ||
| struct gvfile * | file | ||
| ) |
Write struct gvfile.
- Parameters
-
ptr data buffer size buffer size nmemb number of members [out] file pointer to struct gvfile structure
- Returns
- number of items written
Definition at line 156 of file file.c.
References _, gvfile::file, G_fatal_error(), and gvfile::loaded.
Referenced by dig__fwrite_port_C(), dig__fwrite_port_D(), dig__fwrite_port_F(), dig__fwrite_port_I(), dig__fwrite_port_L(), dig__fwrite_port_O(), and dig__fwrite_port_S().
◆ dig_rewind()
| void dig_rewind | ( | struct gvfile * | file | ) |
Rewind file position.
- Parameters
-
file pointer to gvfile structure
Definition at line 87 of file file.c.
References gvfile::current, gvfile::file, gvfile::loaded, and gvfile::start.
Referenced by dig_Rd_Plus_head(), dig_Rd_spidx(), dig_Rd_spidx_head(), dig_read_cidx(), dig_read_cidx_head(), dig_Wr_Plus_head(), dig_Wr_spidx(), dig_Wr_spidx_head(), dig_write_cidx(), dig_write_cidx_head(), and dig_write_plus_file().
