11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
19  * Utility functions for multibyte-character handling,
49  * For US-ASCII and UTF-8 encodings, we can safely recover from
50  * encoding errors and from non-printable characters.  For any
52  * For state-dependent encodings, recovery is impossible.
53  * For arbitrary encodings, replacement of non-printable
54  * characters would be non-trivial and too fragile.
56  * returns for US-ASCII on various operating systems.
64 	return strcmp(loc, "UTF-8") != 0 &&  in dangerous_locale()
65 	    strcmp(loc, "US-ASCII") != 0 &&		/* OpenBSD */  in dangerous_locale()
66 	    strcmp(loc, "ANSI_X3.4-1968") != 0 &&	/* Linux */  in dangerous_locale()
67 	    strcmp(loc, "ISO8859-1") != 0 &&		/* AIX */  in dangerous_locale()
84 		return -1;  in grow_dst()
85 	*dp = tp + (*dp - *dst);  in grow_dst()
93  * including the terminating '\0', to sz.  Unless wp is NULL,
94  * they limit the number of display columns occupied to *wp.
97  * non-NUL bytes that would have been written if both were unlimited.
98  * If wp is NULL, newline, carriage return, and tab are allowed;
100  * written is returned in *wp.
104 vasnmprintf(char **str, size_t maxsz, int *wp, const char *fmt, va_list ap)  in vasnmprintf()  argument
125 		ret = -1;  in vasnmprintf()
137 	max_width = wp == NULL ? INT_MAX : *wp;  in vasnmprintf()
139 		if ((len = mbtowc(&wc, sp, MB_CUR_MAX)) == -1) {  in vasnmprintf()
142 				ret = -1;  in vasnmprintf()
146 			width = -1;  in vasnmprintf()
147 		} else if (wp == NULL &&  in vasnmprintf()
152 			 * is only returned for wp != NULL.  in vasnmprintf()
155 		} else if ((width = wcwidth(wc)) == -1 &&  in vasnmprintf()
157 			ret = -1;  in vasnmprintf()
164 			if (print && (dp - dst >= (int)maxsz - len ||  in vasnmprintf()
165 			    total_width > max_width - width))  in vasnmprintf()
169 				    &dp, len) == -1) {  in vasnmprintf()
170 					ret = -1;  in vasnmprintf()
186 			if (print && (dp - dst >= (int)maxsz - 4 ||  in vasnmprintf()
187 			    total_width > max_width - 4))  in vasnmprintf()
191 				    &dp, 4) == -1) {  in vasnmprintf()
192 					ret = -1;  in vasnmprintf()
196 				width = tp - dp;  in vasnmprintf()
201 			len--;  in vasnmprintf()
212 	if (wp != NULL)  in vasnmprintf()
213 		*wp = total_width;  in vasnmprintf()
224 		ret = -1;  in vasnmprintf()
228 	if (wp != NULL)  in vasnmprintf()
229 		*wp = 0;  in vasnmprintf()
235 		return -1;  in vasnmprintf()
240 snmprintf(char *str, size_t sz, int *wp, const char *fmt, ...)  in snmprintf()  argument
247 	ret = vasnmprintf(&cp, sz, wp, fmt, ap);  in snmprintf()
258 asmprintf(char **outp, size_t sz, int *wp, const char *fmt, ...)  in asmprintf()  argument
265 	ret = vasnmprintf(outp, sz, wp, fmt, ap);  in asmprintf()
273  * return the number of non-NUL bytes written.
284 		return -1;  in vfmprintf()
287 		ret = -1;  in vfmprintf()
321  *      always prefer to select C.[encoding] if possible, but there's no
342 		 * If we're in a UTF-8 locale then prefer to use  in msetlocale()
343 		 * the C.UTF-8 locale (or equivalent) if it exists.  in msetlocale()
345 		if ((strcasestr(cp, "UTF-8") != NULL ||  in msetlocale()
347 		    (setlocale(LC_CTYPE, "C.UTF-8") != NULL ||  in msetlocale()
348 		    setlocale(LC_CTYPE, "POSIX.UTF-8") != NULL))  in msetlocale()