lib/roken/vis.c

153 do_hvis(char *dst, int c, int flag, int nextc, const char *extra)
156 		*dst++ = '%';
157 		*dst++ = xtoa(((unsigned int)c >> 4) & 0xf);
158 		*dst++ = xtoa((unsigned int)c & 0xf);
160 		dst = do_svis(dst, c, flag, nextc, extra);
162 	return dst;
167  * dst:	      Pointer to the destination buffer
175 do_svis(char *dst, int c, int flag, int nextc, const char *extra)
181 		*dst++ = c;
182 		return dst;
187 			*dst++ = '\\'; *dst++ = 'n';
188 			return dst;
190 			*dst++ = '\\'; *dst++ = 'r';
191 			return dst;
193 			*dst++ = '\\'; *dst++ = 'b';
194 			return dst;
196 			*dst++ = '\\'; *dst++ = 'a';
197 			return dst;
199 			*dst++ = '\\'; *dst++ = 'v';
200 			return dst;
202 			*dst++ = '\\'; *dst++ = 't';
203 			return dst;
205 			*dst++ = '\\'; *dst++ = 'f';
206 			return dst;
208 			*dst++ = '\\'; *dst++ = 's';
209 			return dst;
211 			*dst++ = '\\'; *dst++ = '0';
213 				*dst++ = '0';
214 				*dst++ = '0';
216 			return dst;
219 				*dst++ = '\\'; *dst++ = c;
220 				return dst;
225 		*dst++ = '\\';
226 		*dst++ = (u_char)(((unsigned int)(u_char)c >> 6) & 03) + '0';
227 		*dst++ = (u_char)(((unsigned int)(u_char)c >> 3) & 07) + '0';
228 		*dst++ = (u_char)(			 c       & 07) + '0';
230 		if ((flag & VIS_NOSLASH) == 0) *dst++ = '\\';
232 			c &= 0177; *dst++ = 'M';
235 			*dst++ = '^';
237 				*dst++ = '?';
239 				*dst++ = c + '@';
241 			*dst++ = '-'; *dst++ = c;
244 	return dst;
253 rk_svis(char *dst, int c, int flag, int nextc, const char *extra)
257 	_DIAGASSERT(dst != NULL);
261 		*dst = '\0';		/* can't create nextra, return "" */
262 		return dst;
265 		dst = do_hvis(dst, c, flag, nextc, nextra);
267 		dst = do_svis(dst, c, flag, nextc, nextra);
269 	*dst = '\0';
270 	return dst;
275  * strsvis, strsvisx - visually encode characters from src into dst
283  *	expansion.  The length of dst, not including the trailing NULL,
286  *	Strsvisx encodes exactly len bytes from src into dst.
291 rk_strsvis(char *dst, const char *csrc, int flag, const char *extra)
298 	_DIAGASSERT(dst != NULL);
303 		*dst = '\0';		/* can't create nextra, return "" */
307 		for (start = dst; (c = *src++) != '\0'; /* empty */)
308 			dst = do_hvis(dst, c, flag, *src, nextra);
310 		for (start = dst; (c = *src++) != '\0'; /* empty */)
311 			dst = do_svis(dst, c, flag, *src, nextra);
314 	*dst = '\0';
315 	return (dst - start);
320 rk_strsvisx(char *dst, const char *csrc, size_t len, int flag, const char *extra)
327 	_DIAGASSERT(dst != NULL);
332 		*dst = '\0';		/* can't create nextra, return "" */
337 		for (start = dst; len > 0; len--) {
339 			dst = do_hvis(dst, c, flag, len ? *src : '\0', nextra);
342 		for (start = dst; len > 0; len--) {
344 			dst = do_svis(dst, c, flag, len ? *src : '\0', nextra);
348 	*dst = '\0';
349 	return (dst - start);
358 rk_vis(char *dst, int c, int flag, int nextc)
363 	_DIAGASSERT(dst != NULL);
367 		*dst = '\0';		/* can't create extra, return "" */
368 		return dst;
371 		dst = do_hvis(dst, uc, flag, nextc, extra);
373 		dst = do_svis(dst, uc, flag, nextc, extra);
375 	*dst = '\0';
376 	return dst;
381  * strvis, strvisx - visually encode characters from src into dst
384  *	expansion.  The length of dst, not including the trailing NULL,
387  *	Strvisx encodes exactly len bytes from src into dst.
391 rk_strvis(char *dst, const char *src, int flag)
398 		*dst = '\0';		/* can't create extra, return "" */
401 	rv = strsvis(dst, src, flag, extra);
408 rk_strvisx(char *dst, const char *src, size_t len, int flag)
415 		*dst = '\0';		/* can't create extra, return "" */
418 	rv = strsvisx(dst, src, len, flag, extra);