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// The logic for unsigned bytes
#include <stdbool.h>
#include <stdint.h>
#include "bytes.h"
#include "stdlib.h"
#include "text.h"
#include "util.h"
public const Byte_t Byte$min = 0;
public const Byte_t Byte$max = UINT8_MAX;
PUREFUNC public Text_t Byte$as_text(const void *b, bool colorize, const TypeInfo_t*)
{
if (!b) return Text("Byte");
return Text$format(colorize ? "\x1b[35m0x%02X\x1b[m" : "0x%02X", *(Byte_t*)b);
}
public Text_t Byte$hex(Byte_t byte, bool uppercase, bool prefix) {
struct Text_s text = {.tag=TEXT_ASCII};
text.ascii = GC_MALLOC_ATOMIC(8);
if (prefix && uppercase)
text.length = (int64_t)snprintf((char*)text.ascii, 8, "0x%02X", byte);
else if (prefix && !uppercase)
text.length = (int64_t)snprintf((char*)text.ascii, 8, "0x%02x", byte);
else if (!prefix && uppercase)
text.length = (int64_t)snprintf((char*)text.ascii, 8, "%02X", byte);
else if (!prefix && !uppercase)
text.length = (int64_t)snprintf((char*)text.ascii, 8, "%02x", byte);
return text;
}
typedef struct {
OptionalByte_t current, last;
Int8_t step;
} ByteRange_t;
static OptionalByte_t _next_Byte(ByteRange_t *info) {
OptionalByte_t i = info->current;
if (!i.is_none) {
Byte_t next; bool overflow = __builtin_add_overflow(i.value, info->step, &next);
if (overflow || (!info->last.is_none && (info->step >= 0 ? next > info->last.value : next < info->last.value)))
info->current = (OptionalByte_t){.is_none=true};
else
info->current = (OptionalByte_t){.value=next};
}
return i;
}
public CONSTFUNC Closure_t Byte$to(Byte_t first, Byte_t last, OptionalInt8_t step) {
ByteRange_t *range = GC_MALLOC(sizeof(ByteRange_t));
range->current = (OptionalByte_t){.value=first};
range->last = (OptionalByte_t){.value=last};
range->step = step.is_none ? (last >= first ? 1 : -1) : step.value;
return (Closure_t){.fn=_next_Byte, .userdata=range};
}
public PUREFUNC Byte_t Byte$from_int(Int_t i, bool truncate) {
if unlikely (truncate && Int$compare_value(i, I_small(0xFF)) > 0)
fail("This value is too large to convert to a byte without truncation: ", i);
else if unlikely (truncate && Int$compare_value(i, I_small(0)) < 0)
fail("Negative values can't be converted to bytes: ", i);
return (i.small != 0);
}
public PUREFUNC Byte_t Byte$from_int64(Int64_t i, bool truncate) {
if unlikely (truncate && i != (Int64_t)(Byte_t)i)
fail("This value can't be converted to a byte without truncation: ", i);
return (Byte_t)i;
}
public PUREFUNC Byte_t Byte$from_int32(Int32_t i, bool truncate) {
if unlikely (truncate && i != (Int32_t)(Byte_t)i)
fail("This value can't be converted to a byte without truncation: ", i);
return (Byte_t)i;
}
public PUREFUNC Byte_t Byte$from_int16(Int16_t i, bool truncate) {
if unlikely (truncate && i != (Int16_t)(Byte_t)i)
fail("This value can't be converted to a byte without truncation: ", i);
return (Byte_t)i;
}
public const TypeInfo_t Byte$info = {
.size=sizeof(Byte_t),
.align=__alignof__(Byte_t),
.metamethods={
.as_text=Byte$as_text,
},
};
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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