94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
// Optional types
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#include <pthread.h>
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#include "bools.h"
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#include "bytes.h"
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#include "datatypes.h"
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#include "integers.h"
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#include "metamethods.h"
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#include "moments.h"
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#include "patterns.h"
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#include "text.h"
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#include "threads.h"
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#include "util.h"
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public PUREFUNC bool is_none(const void *obj, const TypeInfo_t *non_optional_type)
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{
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if (non_optional_type->metamethods.is_none)
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return non_optional_type->metamethods.is_none(obj, non_optional_type);
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return *(bool*)(obj + non_optional_type->size);
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}
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PUREFUNC public uint64_t Optional$hash(const void *obj, const TypeInfo_t *type)
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{
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return is_none(obj, type->OptionalInfo.type) ? 0 : generic_hash(obj, type->OptionalInfo.type);
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}
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PUREFUNC public int32_t Optional$compare(const void *x, const void *y, const TypeInfo_t *type)
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{
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if (x == y) return 0;
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bool x_is_null = is_none(x, type->OptionalInfo.type);
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bool y_is_null = is_none(y, type->OptionalInfo.type);
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if (x_is_null && y_is_null) return 0;
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else if (x_is_null != y_is_null) return (int32_t)y_is_null - (int32_t)x_is_null;
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else return generic_compare(x, y, type->OptionalInfo.type);
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}
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PUREFUNC public bool Optional$equal(const void *x, const void *y, const TypeInfo_t *type)
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{
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if (x == y) return true;
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bool x_is_null = is_none(x, type->OptionalInfo.type);
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bool y_is_null = is_none(y, type->OptionalInfo.type);
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if (x_is_null && y_is_null) return true;
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else if (x_is_null != y_is_null) return false;
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else return generic_equal(x, y, type->OptionalInfo.type);
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}
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public Text_t Optional$as_text(const void *obj, bool colorize, const TypeInfo_t *type)
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{
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if (!obj)
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return Text$concat(generic_as_text(obj, colorize, type->OptionalInfo.type), Text("?"));
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if (is_none(obj, type->OptionalInfo.type))
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return colorize ? Text("\x1b[31mnone\x1b[m") : Text("none");
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return generic_as_text(obj, colorize, type->OptionalInfo.type);
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}
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public void Optional$serialize(const void *obj, FILE *out, Table_t *pointers, const TypeInfo_t *type)
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{
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bool has_value = !is_none(obj, type->OptionalInfo.type);
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fputc((int)has_value, out);
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if (has_value)
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_serialize(obj, out, pointers, type->OptionalInfo.type);
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}
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public void Optional$deserialize(FILE *in, void *outval, Array_t *pointers, const TypeInfo_t *type)
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{
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bool has_value = (bool)fgetc(in);
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const TypeInfo_t *nonnull = type->OptionalInfo.type;
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if (has_value) {
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memset(outval, 0, (size_t)type->size);
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_deserialize(in, outval, pointers, nonnull);
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} else {
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if (nonnull->tag == TextInfo)
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*(Text_t*)outval = (Text_t){.length=-1};
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else if (nonnull->tag == ArrayInfo)
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*(Array_t*)outval = (Array_t){.length=-1};
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else if (nonnull->tag == TableInfo)
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*(Table_t*)outval = (Table_t){.entries={.length=-1}};
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else if (nonnull == &Num$info)
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*(double*)outval = NAN;
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else if (nonnull == &Num32$info)
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*(float*)outval = NAN;
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else if (nonnull->tag == StructInfo || (nonnull->tag == OpaqueInfo && type->size > nonnull->size))
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memset(outval + type->size, -1, (size_t)(type->size - nonnull->size));
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else
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memset(outval, 0, (size_t)type->size);
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}
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}
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// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1
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