32  * fmt_scaled: Format numbers scaled for human comprehension
35  * "Human-readable" output uses 4 digits max, and puts a unit suffix at
36  * the end.  Makes output compact and easy-to-read esp. on huge disks.
56 /* These three arrays MUST be in sync!  XXX make a struct */
70 #define MAX_DIGITS (SCALE_LENGTH * 3)	/* XXX strlen(sprintf("%lld", -1)? */
72 /* Convert the given input string "scaled" into numeric in "result".
73  * Return 0 on success, -1 and errno set on error.
76 scan_scaled(char *scaled, long long *result)  in scan_scaled()  argument
78 	char *p = scaled;  in scan_scaled()
87 	/* Then at most one leading + or - */  in scan_scaled()
88 	while (*p == '-' || *p == '+') {  in scan_scaled()
89 		if (*p == '-') {  in scan_scaled()
92 				return -1;  in scan_scaled()
94 			sign = -1;  in scan_scaled()
99 				return -1;  in scan_scaled()
116 				return -1;  in scan_scaled()
122 		i = (*p) - '0';			/* whew! finally a digit we can use */  in scan_scaled()
124 			if (fract_digits >= MAX_DIGITS-1)  in scan_scaled()
130 				return -1;  in scan_scaled()
133 			if (i > LLONG_MAX - fpart) {  in scan_scaled()
135 				return -1;  in scan_scaled()
141 				return -1;  in scan_scaled()
145 				return -1;  in scan_scaled()
148 			if (i > LLONG_MAX - whole) {  in scan_scaled()
150 				return -1;  in scan_scaled()
175 				return -1;  in scan_scaled()
183 				return -1;  in scan_scaled()
195 				fract_digits--;  in scan_scaled()
199 				for (i = 0; i < fract_digits -1; i++)  in scan_scaled()
202 			if (sign == -1)  in scan_scaled()
203 				whole -= fpart;  in scan_scaled()
213 	return -1;  in scan_scaled()
216 /* Format the given "number" into human-readable form in "result".
218  * Return 0 on success, -1 and errno set if error.
230 		return -1;  in fmt_scaled()
236 	if (abval / 1024 >= scale_factors[SCALE_LENGTH-1]) {  in fmt_scaled()
238 		return -1;  in fmt_scaled()
248 				fract /= scale_factors[i - 1];  in fmt_scaled()
259 			number--;  in fmt_scaled()
268 	else if (unit == NONE || number >= 100 || number <= -100) {  in fmt_scaled()
273 				number--;  in fmt_scaled()
287  * Copy-and-paste whatever you need from it.
296 		printf("\"%s\" -> %lld\n", cinput, result);  in main()
301 		printf("%lld -> \"%s\"\n", ninput, buf);  in main()