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Add internal_int_(pack, unpack).

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This commit is contained in:
Jeroen van Rijn
2021-09-06 12:57:48 +02:00
parent 7db0c50e63
commit de5d897b5c
4 changed files with 141 additions and 19 deletions
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core/math/big/helpers.odin
+7 -7
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@@ -495,7 +495,7 @@ int_to_bytes_little :: proc(a: ^Int, buf: []u8, signed := false, allocator := co
if signed {
buf[l - 1] = 1 if a.sign == .Negative else 0;
}
for offset := 0; offset < size_in_bits; offset += 8 {
#no_bounds_check for offset := 0; offset < size_in_bits; offset += 8 {
bits, _ := internal_int_bitfield_extract(a, offset, 8);
buf[i] = u8(bits & 255); i += 1;
}
@@ -519,7 +519,7 @@ int_to_bytes_big :: proc(a: ^Int, buf: []u8, signed := false, allocator := conte
if signed {
buf[0] = 1 if a.sign == .Negative else 0;
}
for offset := 0; offset < size_in_bits; offset += 8 {
#no_bounds_check for offset := 0; offset < size_in_bits; offset += 8 {
bits, _ := internal_int_bitfield_extract(a, offset, 8);
buf[i] = u8(bits & 255); i -= 1;
}
@@ -546,7 +546,7 @@ int_to_bytes_little_python :: proc(a: ^Int, buf: []u8, signed := false, allocato
size_in_bits := internal_count_bits(t);
i := 0;
for offset := 0; offset < size_in_bits; offset += 8 {
#no_bounds_check for offset := 0; offset < size_in_bits; offset += 8 {
bits, _ := internal_int_bitfield_extract(t, offset, 8);
buf[i] = 255 - u8(bits & 255); i += 1;
}
@@ -554,7 +554,7 @@ int_to_bytes_little_python :: proc(a: ^Int, buf: []u8, signed := false, allocato
} else {
size_in_bits := internal_count_bits(a);
i := 0;
for offset := 0; offset < size_in_bits; offset += 8 {
#no_bounds_check for offset := 0; offset < size_in_bits; offset += 8 {
bits, _ := internal_int_bitfield_extract(a, offset, 8);
buf[i] = u8(bits & 255); i += 1;
}
@@ -583,7 +583,7 @@ int_to_bytes_big_python :: proc(a: ^Int, buf: []u8, signed := false, allocator :
size_in_bits := internal_count_bits(t);
i := l - 1;
for offset := 0; offset < size_in_bits; offset += 8 {
#no_bounds_check for offset := 0; offset < size_in_bits; offset += 8 {
bits, _ := internal_int_bitfield_extract(t, offset, 8);
buf[i] = 255 - u8(bits & 255); i -= 1;
}
@@ -620,7 +620,7 @@ int_from_bytes_big :: proc(a: ^Int, buf: []u8, signed := false, allocator := con
buf = buf[1:];
}
for v in buf {
#no_bounds_check for v in buf {
internal_shl(a, a, 8) or_return;
a.digit[0] |= DIGIT(v);
}
@@ -657,7 +657,7 @@ int_from_bytes_big_python :: proc(a: ^Int, buf: []u8, signed := false, allocator
buf = buf[1:];
}
for v in buf {
#no_bounds_check for v in buf {
internal_shl(a, a, 8) or_return;
if signed && sign == .Negative {
a.digit[0] |= DIGIT(255 - v);