bin/dd/conv.c

11  * Redistribution and use in source and binary forms, with or without
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
69 		for (inp = in.dbp - (cnt = in.dbrcnt); cnt--; ++inp)
73 	out.dbp = in.dbp;
74 	out.dbcnt = in.dbcnt;
76 	if (in.dbcnt >= out.dbsz) {
85 		in.dbp = out.dbp;
86 		in.dbcnt = out.dbcnt;
94 	/* Just update the count, everything is already in the buffer. */
95 	if (in.dbcnt)
96 		out.dbcnt = in.dbcnt;
101 /* These can not be called, but just in case...  */
113  * max in buffer:  MAX(ibs, cbsz)
126 	 * Record truncation can cross block boundaries.  If currently in a
132 		for (inp = in.db, cnt = in.dbrcnt;
135 			in.dbcnt = 0;
136 			in.dbp = in.db;
141 		in.dbcnt = cnt - 1;
142 		in.dbp = inp + cnt - 1;
149 	for (inp = in.dbp - in.dbcnt, outp = out.dbp; in.dbcnt;) {
150 		maxlen = MIN(cbsz, in.dbcnt);
163 		if (ch != '\n' && in.dbcnt < cbsz) {
164 			(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
169 		in.dbcnt -= cnt;
171 			--in.dbcnt;
181 			if (!in.dbcnt || *inp != '\n')
185 			for (; in.dbcnt && *inp++ != '\n'; --in.dbcnt);
186 			if (!in.dbcnt)
189 				--in.dbcnt;
198 	in.dbp = in.db + in.dbcnt;
209 	 * translation.  The bottom line is that anything left in the input
210 	 * buffer is a truncated record.  Anything left in the output buffer
213 	if (in.dbcnt) {
215 		(void)memmove(out.dbp, in.dbp - in.dbcnt, in.dbcnt);
216 		(void)memset(out.dbp + in.dbcnt,
217 		    ctab ? ctab[' '] : ' ', cbsz - in.dbcnt);
226  * max in buffer:  MAX(ibs, cbsz) + cbsz
238 		for (cnt = in.dbrcnt, inp = in.dbp - 1; cnt--; inp--)
245 	for (inp = in.db; in.dbcnt >= cbsz; inp += cbsz, in.dbcnt -= cbsz) {
258 	if (in.dbcnt)
259 		(void)memmove(in.db, in.dbp - in.dbcnt, in.dbcnt);
260 	in.dbp = in.db + in.dbcnt;
269 	if (in.dbcnt) {
270 		warnx("%s: short input record", in.name);
271 		for (t = in.db + in.dbcnt - 1; t >= in.db && *t == ' '; --t);
272 		if (t >= in.db) {
273 			cnt = t - in.db + 1;
274 			(void)memmove(out.dbp, in.db, cnt);