#include "../fio.h"
-/*
- * Cheesy number->string conversion, complete with carry rounding error.
+#define ARRAY_LENGTH(arr) sizeof(arr) / sizeof((arr)[0])
+
+/**
+ * num2str() - Cheesy number->string conversion, complete with carry rounding error.
+ * @num: quantity (e.g., number of blocks, bytes or bits)
+ * @maxlen: max number of digits in the output string (not counting prefix and units)
+ * @base: multiplier for num (e.g., if num represents Ki, use 1024)
+ * @pow2: select unit prefix - 0=power-of-10 decimal SI, nonzero=power-of-2 binary IEC
+ * @units: select units - N2S_* macros defined in fio.h
+ * @returns a malloc'd buffer containing "number[<unit prefix>][<units>]"
*/
-char *num2str(unsigned long num, int maxlen, int base, int pow2, int unit_base)
+char *num2str(uint64_t num, int maxlen, int base, int pow2, int units)
{
- const char *postfix[] = { "", "K", "M", "G", "P", "E" };
- const char *byte_postfix[] = { "", "B", "bit" };
+ const char *sistr[] = { "", "k", "M", "G", "T", "P" };
+ const char *iecstr[] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
+ const char **unitprefix;
+ const char *unitstr[] = { "", "/s", "B", "bit", "B/s", "bit/s" };
const unsigned int thousand[] = { 1000, 1024 };
unsigned int modulo, decimals;
- int byte_post_index = 0, post_index, carry = 0;
+ int unit_index = 0, post_index, carry = 0;
char tmp[32];
char *buf;
+ compiletime_assert(sizeof(sistr) == sizeof(iecstr), "unit prefix arrays must be identical sizes");
+
buf = malloc(128);
+ if (!buf)
+ return NULL;
+
+ if (pow2)
+ unitprefix = iecstr;
+ else
+ unitprefix = sistr;
for (post_index = 0; base > 1; post_index++)
base /= thousand[!!pow2];
- switch (unit_base) {
- case 1:
- byte_post_index = 2;
+ switch (units) {
+ case N2S_PERSEC:
+ unit_index = 1;
+ break;
+ case N2S_BYTE:
+ unit_index = 2;
+ break;
+ case N2S_BIT:
+ unit_index = 3;
num *= 8;
break;
- case 8:
- byte_post_index = 1;
+ case N2S_BYTEPERSEC:
+ unit_index = 4;
+ break;
+ case N2S_BITPERSEC:
+ unit_index = 5;
+ num *= 8;
break;
}
modulo = -1U;
- while (post_index < sizeof(postfix)) {
- sprintf(tmp, "%lu", num);
+ while (post_index < sizeof(sistr)) {
+ sprintf(tmp, "%llu", (unsigned long long) num);
if (strlen(tmp) <= maxlen)
break;
if (modulo == -1U) {
done:
- sprintf(buf, "%lu%s%s", num, postfix[post_index],
- byte_postfix[byte_post_index]);
+ if (post_index >= ARRAY_LENGTH(sistr))
+ post_index = 0;
+
+ sprintf(buf, "%llu%s%s", (unsigned long long) num,
+ unitprefix[post_index], unitstr[unit_index]);
return buf;
}
- sprintf(tmp, "%lu", num);
+ sprintf(tmp, "%llu", (unsigned long long) num);
decimals = maxlen - strlen(tmp);
if (decimals <= 1) {
if (carry)
modulo = (modulo + 9) / 10;
} while (1);
- sprintf(buf, "%lu.%u%s%s", num, modulo, postfix[post_index],
- byte_postfix[byte_post_index]);
+ sprintf(buf, "%llu.%u%s%s", (unsigned long long) num, modulo,
+ unitprefix[post_index], unitstr[unit_index]);
return buf;
}