54 vis(char *dst, int c, int flag, int nextc)  in vis()  argument
57 		*dst++ = c;  in vis()
59 			*dst++ = '\\';  in vis()
60 		*dst = '\0';  in vis()
61 		return (dst);  in vis()
67 			*dst++ = '\\';  in vis()
68 			*dst++ = 'n';  in vis()
71 			*dst++ = '\\';  in vis()
72 			*dst++ = 'r';  in vis()
75 			*dst++ = '\\';  in vis()
76 			*dst++ = 'b';  in vis()
79 			*dst++ = '\\';  in vis()
80 			*dst++ = 'a';  in vis()
83 			*dst++ = '\\';  in vis()
84 			*dst++ = 'v';  in vis()
87 			*dst++ = '\\';  in vis()
88 			*dst++ = 't';  in vis()
91 			*dst++ = '\\';  in vis()
92 			*dst++ = 'f';  in vis()
95 			*dst++ = '\\';  in vis()
96 			*dst++ = 's';  in vis()
99 			*dst++ = '\\';  in vis()
100 			*dst++ = '0';  in vis()
102 				*dst++ = '0';  in vis()
103 				*dst++ = '0';  in vis()
110 		*dst++ = '\\';  in vis()
111 		*dst++ = ((u_char)c >> 6 & 07) + '0';  in vis()
112 		*dst++ = ((u_char)c >> 3 & 07) + '0';  in vis()
113 		*dst++ = ((u_char)c & 07) + '0';  in vis()
117 		*dst++ = '\\';  in vis()
120 		*dst++ = 'M';  in vis()
123 		*dst++ = '^';  in vis()
125 			*dst++ = '?';  in vis()
127 			*dst++ = c + '@';  in vis()
129 		*dst++ = '-';  in vis()
130 		*dst++ = c;  in vis()
133 	*dst = '\0';  in vis()
134 	return (dst);  in vis()
151 strvis(char *dst, const char *src, int flag)  in strvis()  argument
156 	for (start = dst; (c = *src);)  in strvis()
157 		dst = vis(dst, c, flag, *++src);  in strvis()
158 	*dst = '\0';  in strvis()
159 	return (dst - start);  in strvis()
163 strnvis(char *dst, const char *src, size_t siz, int flag)  in strnvis()  argument
170 	for (start = dst, end = start + siz - 1; (c = *src) && dst < end; ) {  in strnvis()
173 			*dst++ = c;  in strnvis()
176 				if (dst < end)  in strnvis()
177 					*dst++ = '\\';  in strnvis()
179 					dst--;  in strnvis()
187 			if (dst + i <= end) {  in strnvis()
188 				memcpy(dst, tbuf, i);  in strnvis()
189 				dst += i;  in strnvis()
197 		*dst = '\0';  in strnvis()
198 	if (dst + i > end) {  in strnvis()
201 			dst += vis(tbuf, c, flag, *++src) - tbuf;  in strnvis()
203 	return (dst - start);  in strnvis()
207 strvisx(char *dst, const char *src, size_t len, int flag)  in strvisx()  argument
212 	for (start = dst; len > 1; len--) {  in strvisx()
214 		dst = vis(dst, c, flag, *++src);  in strvisx()
217 		dst = vis(dst, *src, flag, '\0');  in strvisx()
218 	*dst = '\0';  in strvisx()
219 	return (dst - start);  in strvisx()