path: root/cmd/cmd_seek.c

#include "buf.h"
#include "core.h"

#include "libcmd/cmd.h"
#include "libcmd/cmd_parse.h"

extern file_t *g_file;
extern Buf *g_buf;
extern int g_flags;

int if_decimal(char *s, int sz)
{
	int i=0;
	while (i<sz)
	{
		//printf("%d\n",i);
		if (!isdigit(s[i]))
			return 0;
		i++;
	}
	return 1;
}

int if_hex(char *s, int sz)
{
	int i=0;
	while (i<sz)
	{
		//printf("%d\n",i);
		if (!isxdigit(s[i]))
			return 0;
		i++;
	}
	return 1;
}

int c_seek(  cmd_arg_t *arg  )
{
	int fret;
	int argc = arg->argc;
	char **argv = arg->argv;
	int *type = arg->type;
	int checktype;
	off_t offset;
	int off_type = 0; //-1 seek down, 0 set pos, +1 seek up

	if (argc != 1)
	{
		printf("One argument needed\n");
		return -1;
	}

	if (g_file->fd == 0)
	{
		printf("File descriptor not set\n");
		return -1;
	}

	switch( argv[0][0] )
	{
	case '+':
		off_type = 1;
		break;
	case '-':
		off_type = -1;
		break;
	default:
		off_type = 0;
	}

	//printf("Type %d\n",type[0]);
	checktype = type[0];
	if (checktype == CMDT_WORD)
	{
		if (if_decimal(argv[0]+1,strlen(argv[0])-1))
		{
			checktype = CMDT_INT;
		} else if (if_hex(argv[0]+3,strlen(argv[0])-3))
		{
			checktype = CMDT_HEX;
		}
	}


	//check argument type and convert to offset
	if (checktype == CMDT_INT)
	{
		if (off_type != 0)
		{
			offset = atoi( argv[0] ); //!fix that to strtol at least
		} else 
		{
			offset = atoi( argv[0] );
		}
	} else if (checktype == CMDT_HEX)
	{
		if (off_type != 0)
		{
			offset = strtol( argv[0], NULL, 16);
		} else 
		{
			offset = strtol( argv[0]+3, NULL, 16);
		}
	} else
	{
		//unsupported argument do nothing
		return 0;
	}
	

	if (off_type == 0)
	{
		//g_file offset maybe wrong
		//printf("seekp\n");
		fret = file_seekp( g_file, offset );
	} else
	{
		//printf("seek\n");
		fret = file_seek( g_file, offset );
	}
	if ( fret < 0 )
	{
		printf("Cannot seek postion to %zd\n", offset);
		return -1;
	}

	return 0;
}

int h_seek( cmd_arg_t *arg )
{
	printf("[POS] - move to differnt file offset");
	return 0;
}