49 fseeko(FILE *fp, off_t offset, int whence)  in fseeko()  argument
64 	if ((seekfn = fp->_seek) == NULL) {  in fseeko()
73 	FLOCKFILE(fp);  in fseeko()
82 		__sflush(fp);	/* may adjust seek offset on append stream */  in fseeko()
83 		if (fp->_flags & __SOFF)  in fseeko()
84 			curoff = fp->_offset;  in fseeko()
86 			curoff = (*seekfn)(fp->_cookie, (fpos_t)0, SEEK_CUR);  in fseeko()
88 				FUNLOCKFILE(fp);  in fseeko()
92 		if (fp->_flags & __SRD) {  in fseeko()
93 			curoff -= fp->_r;  in fseeko()
94 			if (HASUB(fp))  in fseeko()
95 				curoff -= fp->_ur;  in fseeko()
96 		} else if (fp->_flags & __SWR && fp->_p != NULL)  in fseeko()
97 			curoff += fp->_p - fp->_bf._base;  in fseeko()
111 		FUNLOCKFILE(fp);  in fseeko()
124 	if (fp->_bf._base == NULL)  in fseeko()
125 		__smakebuf(fp);  in fseeko()
126 	if (fp->_flags & (__SWR | __SRW | __SNBF | __SNPT))  in fseeko()
128 	if ((fp->_flags & __SOPT) == 0) {  in fseeko()
130 		    fp->_file < 0 || fstat(fp->_file, &st) ||  in fseeko()
132 			fp->_flags |= __SNPT;  in fseeko()
135 		fp->_blksize = st.st_blksize;  in fseeko()
136 		fp->_flags |= __SOPT;  in fseeko()
146 		if (fstat(fp->_file, &st))  in fseeko()
152 		if (fp->_flags & __SOFF)  in fseeko()
153 			curoff = fp->_offset;  in fseeko()
155 			curoff = (*seekfn)(fp->_cookie, (fpos_t)0, SEEK_CUR);  in fseeko()
159 		curoff -= fp->_r;  in fseeko()
160 		if (HASUB(fp))  in fseeko()
161 			curoff -= fp->_ur;  in fseeko()
170 	if (HASUB(fp)) {  in fseeko()
171 		curoff += fp->_r;	/* kill off ungetc */  in fseeko()
172 		n = fp->_up - fp->_bf._base;  in fseeko()
174 		n += fp->_ur;  in fseeko()
176 		n = fp->_p - fp->_bf._base;  in fseeko()
178 		n += fp->_r;  in fseeko()
187 	if ((fp->_flags & __SMOD) == 0 &&  in fseeko()
191 		fp->_p = fp->_bf._base + o;  in fseeko()
192 		fp->_r = n - o;  in fseeko()
193 		if (HASUB(fp))  in fseeko()
194 			FREEUB(fp);  in fseeko()
195 		fp->_flags &= ~__SEOF;  in fseeko()
196 		FUNLOCKFILE(fp);  in fseeko()
208 	curoff = target & ~(fp->_blksize - 1);  in fseeko()
209 	if ((*seekfn)(fp->_cookie, curoff, SEEK_SET) == POS_ERR)  in fseeko()
211 	fp->_r = 0;  in fseeko()
212 	fp->_p = fp->_bf._base;  in fseeko()
213 	if (HASUB(fp))  in fseeko()
214 		FREEUB(fp);  in fseeko()
215 	fp->_flags &= ~__SEOF;  in fseeko()
218 		if (__srefill(fp) || (size_t)fp->_r < n)  in fseeko()
220 		fp->_p += n;  in fseeko()
221 		fp->_r -= n;  in fseeko()
223 	FUNLOCKFILE(fp);  in fseeko()
231 	if (__sflush(fp) ||  in fseeko()
232 	    (*seekfn)(fp->_cookie, (fpos_t)offset, whence) == POS_ERR) {  in fseeko()
233 		FUNLOCKFILE(fp);  in fseeko()
237 	if (HASUB(fp))  in fseeko()
238 		FREEUB(fp);  in fseeko()
239 	fp->_p = fp->_bf._base;  in fseeko()
240 	fp->_r = 0;  in fseeko()
242 	fp->_flags &= ~__SEOF;  in fseeko()
243 	FUNLOCKFILE(fp);  in fseeko()
254 fseek(FILE *fp, long offset, int whence)  in fseek()  argument
258 	return(fseeko(fp, off, whence));  in fseek()