| 1 | #include "mycpp/gc_mops.h"
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| 2 |
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| 3 | #include <errno.h>
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| 4 | #include <inttypes.h> // PRIo64, PRIx64
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| 5 | #include <math.h> // isnan(), isinf()
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| 6 | #include <stdio.h>
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| 7 |
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| 8 | #include "mycpp/gc_alloc.h"
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| 9 | #include "mycpp/gc_builtins.h" // StringToInt64
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| 10 | #include "mycpp/gc_str.h"
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| 11 |
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| 12 | namespace mops {
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| 13 |
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| 14 | const BigInt ZERO = BigInt{0};
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| 15 | const BigInt ONE = BigInt{1};
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| 16 | const BigInt MINUS_ONE = BigInt{-1};
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| 17 | const BigInt MINUS_TWO = BigInt{-2}; // for printf
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| 18 |
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| 19 | static const int kInt64BufSize = 32; // more than twice as big as kIntBufSize
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| 20 |
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| 21 | // Note: Could also use OverAllocatedStr, but most strings are small?
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| 22 |
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| 23 | // Similar to str(int i) in gc_builtins.cc
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| 24 |
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| 25 | BigStr* ToStr(BigInt b) {
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| 26 | char buf[kInt64BufSize];
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| 27 | int len = snprintf(buf, kInt64BufSize, "%" PRId64, b);
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| 28 | return ::StrFromC(buf, len);
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| 29 | }
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| 30 |
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| 31 | BigStr* ToOctal(BigInt b) {
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| 32 | char buf[kInt64BufSize];
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| 33 | int len = snprintf(buf, kInt64BufSize, "%" PRIo64, b);
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| 34 | return ::StrFromC(buf, len);
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| 35 | }
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| 36 |
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| 37 | BigStr* ToHexUpper(BigInt b) {
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| 38 | char buf[kInt64BufSize];
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| 39 | int len = snprintf(buf, kInt64BufSize, "%" PRIX64, b);
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| 40 | return ::StrFromC(buf, len);
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| 41 | }
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| 42 |
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| 43 | BigStr* ToHexLower(BigInt b) {
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| 44 | char buf[kInt64BufSize];
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| 45 | int len = snprintf(buf, kInt64BufSize, "%" PRIx64, b);
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| 46 | return ::StrFromC(buf, len);
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| 47 | }
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| 48 |
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| 49 | // Copied from gc_builtins - to_int()
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| 50 | BigInt FromStr(BigStr* s, int base) {
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| 51 | int64_t i;
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| 52 | if (StringToInt64(s->data_, len(s), base, &i)) {
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| 53 | return i;
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| 54 | } else {
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| 55 | throw Alloc<ValueError>();
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| 56 | }
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| 57 | }
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| 58 |
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| 59 | Tuple2<bool, BigInt> FromFloat(double f) {
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| 60 | if (isnan(f) || isinf(f)) {
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| 61 | return Tuple2<bool, BigInt>(false, MINUS_ONE);
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| 62 | }
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| 63 | return Tuple2<bool, BigInt>(true, static_cast<BigInt>(f));
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| 64 | }
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| 65 |
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| 66 | } // namespace mops
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