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RL-RTX RL-FlashFS RL-TCPnet RL-CAN Example Programs Library Reference Data Types
BIT BOOL CAN_ERROR CAN_msg FILE S8 S16 S32 S64 U8 U16 U32 U64 Include Files can_cfg.h can_error.h file_config.h net_config.h rtl.h rtx_can.h rtx_config.h stdio.h Reference _alloc_box _calloc_box _declare_box _declare_box8 _free_box _init_box _init_box8 arp_cache_ip CAN_init CAN_receive CAN_request CAN_rx_object CAN_send CAN_set CAN_start CAN_tx_object cgi_func cgi_process_data cgi_process_var com_getchar com_putchar com_tx_active dhcp_disable fanalyse fcheck fclose fdefrag fdelete feof ferror ffind fflush fformat ffree fgetc fgets finit fopen fprintf fputc fputs fread frename fs_EraseSector fs_get_date fs_get_time fs_Init fs_ProgramPage fs_spi_EraseSector fs_spi_Init fs_spi_ProgramPage fs_spi_ReadData fscanf fseek ftell fwrite get_host_by_name http_get_info http_get_lang http_get_session http_get_var igmp_join igmp_leave init_ethernet init_modem init_serial init_TcpNet int_disable_eth int_enable_eth interrupt_ethernet isr_evt_set isr_mbx_check isr_mbx_receive isr_mbx_send isr_sem_send main_TcpNet mci_init mci_read_config mci_read_sect mci_write_sect modem_dial modem_hangup modem_listen modem_online modem_process modem_run os_dly_wait os_evt_clr os_evt_get os_evt_set os_evt_wait_and os_evt_wait_or os_itv_set os_itv_wait os_mbx_check os_mbx_declare os_mbx_init os_mbx_send os_mbx_wait os_mut_init os_mut_release os_mut_wait os_sem_init os_sem_send os_sem_wait os_sys_init os_sys_init_prio os_sys_init_user os_tmr_call os_tmr_create os_tmr_kill os_tsk_create os_tsk_create_ex os_tsk_create_user os_tsk_create_user_ex os_tsk_delete os_tsk_delete_self os_tsk_pass os_tsk_prio os_tsk_prio_self os_tsk_self poll_ethernet ppp_close ppp_connect ppp_is_up ppp_listen rewind send_frame slip_close slip_connect slip_is_up slip_listen smtp_cbfunc smtp_connect spi_hi_speed spi_init spi_send spi_ss tcp_abort tcp_check_send tcp_close tcp_connect tcp_get_buf tcp_get_socket tcp_get_state tcp_listen tcp_max_dsize tcp_release_socket tcp_reset_window tcp_send tftp_fclose tftp_fopen tftp_fread tftp_fwrite timer_tick tnet_cbfunc tnet_ccmp tnet_get_info tnet_msg_poll tnet_process_cmd tnet_set_delay tsk_lock tsk_unlock udp_close udp_get_buf udp_get_socket udp_mcast_ttl udp_open udp_release_socket udp_send ungetc Library Files Appendixfseek
| Summary |
#include <stdio.h> int fseek ( FILE *stream, /* file stream */ long offset, /* file position offset */ int origin); /* initial offset origin */ | |||||||||
| Description | The fseek function moves the file pointer associated with stream to the location that is offset bytes from origin. The next operation on the stream takes place at this new location. The origin may be one of the following manifest constant values:
The fseek function may reposition the file pointer anywhere in the file or past the end of the file. Attempts to position the file pointer before the beginning of the file causes an error. The fseek function clears the end-of-file indicator. The fseek function is in the RL-FlashFS library. The prototype is defined in stdio.h. Note
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| Return Value | The fseek function returns a value of 0 if successful or a value of EOF if unsuccessful. | |||||||||
| See Also | ftell, rewind | |||||||||
| Example |
#include <rtl.h>
#include <stdio.h>
void tst_fseek (void) {
FILE *fin;
char ch;
fin = fopen ("Test.txt","r");
if (fin == NULL) {
printf ("File not found!\n");
}
else {
// Read the 5th character from file
fseek (fin, 5L, SEEK_SET);
ch = fgetc (fin);
// Read the last character from file
fseek (fin, -1L, SEEK_END);
ch = fgetc (fin);
fclose (fin);
}
}
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