48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
#include <stdio.h>
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#include "util.h"
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#define B_IN_KiB 1024ull
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#define B_IN_MiB B_IN_KiB * 1024
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#define B_IN_GiB B_IN_MiB * 1024
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#define B_IN_TiB B_IN_GiB * 1024
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#define B_IN_KB 1000ull
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#define B_IN_MB B_IN_KB * 1000
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#define B_IN_GB B_IN_MB * 1000
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#define B_IN_TB B_IN_GB * 1000
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int util_byte2human(long int bytes, int binary, int precision, char* out, size_t out_len) {
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#define S_CONV(t) ((binary) ? (B_IN_##t##iB) : (B_IN_##t##B))
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#define S_LESS(t) (bytes < S_CONV(t))
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#define S_SUFFIX(t) ((binary) ? (t "iB") : (t "B"))
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if (!out)
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return -1;
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int written;
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if (S_LESS(K))
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written = snprintf(out, out_len, "%ld B", bytes);
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else if (S_LESS(M))
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written = snprintf(out, out_len, "%.*f %s", (precision == -1) ? 0 : precision, bytes / (double)(S_CONV(K)), S_SUFFIX("K"));
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else if (S_LESS(G))
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written = snprintf(out, out_len, "%.*f %s", (precision == -1) ? 1 : precision, bytes / (double)(S_CONV(M)), S_SUFFIX("M"));
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else if (S_LESS(T))
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written = snprintf(out, out_len, "%.*f %s", (precision == -1) ? 2 : precision, bytes / (double)(S_CONV(G)), S_SUFFIX("G"));
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else
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written = snprintf(out, out_len, "%.*f %s", (precision == -1) ? 3 : precision, bytes / (double)(S_CONV(T)), S_SUFFIX("T"));
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return (written >= out_len) ? -1 : written;
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#undef S_SUFFIX
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#undef S_LESS
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#undef S_CONV
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}
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void util_byte2hex(const unsigned char* bytes, int bytes_len, int uppercase, char* out) {
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const char* hex = (uppercase) ? "0123456789ABCDEF" : "0123456789abcdef";
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for (int i = 0; i < bytes_len; i++) {
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*out++ = hex[bytes[i] >> 4];
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*out++ = hex[bytes[i] & 0xF];
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}
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*out = '\0';
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}
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