aboutsummaryrefslogtreecommitdiff
path: root/src/exact_value.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/exact_value.c')
-rw-r--r--src/exact_value.c400
1 files changed, 400 insertions, 0 deletions
diff --git a/src/exact_value.c b/src/exact_value.c
new file mode 100644
index 000000000..313cda694
--- /dev/null
+++ b/src/exact_value.c
@@ -0,0 +1,400 @@
+#include <math.h>
+
+// TODO(bill): Big numbers
+// IMPORTANT TODO(bill): This needs to be completely fixed!!!!!!!!
+
+typedef struct AstNode AstNode;
+
+typedef enum ExactValueKind {
+ ExactValue_Invalid,
+
+ ExactValue_Bool,
+ ExactValue_String,
+ ExactValue_Integer,
+ ExactValue_Float,
+ ExactValue_Pointer,
+ ExactValue_Compound, // TODO(bill): Is this good enough?
+
+ ExactValue_Count,
+} ExactValueKind;
+
+typedef struct ExactValue {
+ ExactValueKind kind;
+ union {
+ bool value_bool;
+ String value_string;
+ i64 value_integer; // NOTE(bill): This must be an integer and not a pointer
+ f64 value_float;
+ i64 value_pointer;
+ AstNode *value_compound;
+ };
+} ExactValue;
+
+HashKey hash_exact_value(ExactValue v) {
+ return hashing_proc(&v, gb_size_of(ExactValue));
+}
+
+
+ExactValue make_exact_value_compound(AstNode *node) {
+ ExactValue result = {ExactValue_Compound};
+ result.value_compound = node;
+ return result;
+}
+
+ExactValue make_exact_value_bool(bool b) {
+ ExactValue result = {ExactValue_Bool};
+ result.value_bool = (b != 0);
+ return result;
+}
+
+ExactValue make_exact_value_string(String string) {
+ // TODO(bill): Allow for numbers with underscores in them
+ ExactValue result = {ExactValue_String};
+ result.value_string = string;
+ return result;
+}
+
+ExactValue make_exact_value_integer_from_string(String string) {
+ // TODO(bill): Allow for numbers with underscores in them
+ ExactValue result = {ExactValue_Integer};
+ i32 base = 10;
+ if (string.text[0] == '0') {
+ switch (string.text[1]) {
+ case 'b': base = 2; break;
+ case 'o': base = 8; break;
+ case 'd': base = 10; break;
+ case 'x': base = 16; break;
+ }
+ }
+
+ result.value_integer = gb_str_to_i64(cast(char *)string.text, NULL, base);
+
+ return result;
+}
+
+ExactValue make_exact_value_integer(i64 i) {
+ ExactValue result = {ExactValue_Integer};
+ result.value_integer = i;
+ return result;
+}
+
+ExactValue make_exact_value_float_from_string(String string) {
+ // TODO(bill): Allow for numbers with underscores in them
+ ExactValue result = {ExactValue_Float};
+ result.value_float = gb_str_to_f64(cast(char *)string.text, NULL);
+ return result;
+}
+
+ExactValue make_exact_value_float(f64 f) {
+ ExactValue result = {ExactValue_Float};
+ result.value_float = f;
+ return result;
+}
+
+ExactValue make_exact_value_pointer(i64 ptr) {
+ ExactValue result = {ExactValue_Pointer};
+ result.value_pointer = ptr;
+ return result;
+}
+
+ExactValue make_exact_value_from_basic_literal(Token token) {
+ switch (token.kind) {
+ case Token_String: return make_exact_value_string(token.string);
+ case Token_Integer: return make_exact_value_integer_from_string(token.string);
+ case Token_Float: return make_exact_value_float_from_string(token.string);
+ case Token_Rune: {
+ Rune r = GB_RUNE_INVALID;
+ gb_utf8_decode(token.string.text, token.string.len, &r);
+ // gb_printf("%.*s rune: %d\n", LIT(token.string), r);
+ return make_exact_value_integer(r);
+ }
+ default:
+ GB_PANIC("Invalid token for basic literal");
+ break;
+ }
+
+ ExactValue result = {ExactValue_Invalid};
+ return result;
+}
+
+ExactValue exact_value_to_integer(ExactValue v) {
+ switch (v.kind) {
+ case ExactValue_Integer:
+ return v;
+ case ExactValue_Float: {
+ i64 i = cast(i64)v.value_float;
+ f64 f = cast(f64)i;
+ if (f == v.value_float) {
+ return make_exact_value_integer(i);
+ }
+ } break;
+
+ case ExactValue_Pointer:
+ return make_exact_value_integer(cast(i64)cast(intptr)v.value_pointer);
+ }
+ ExactValue r = {ExactValue_Invalid};
+ return r;
+}
+
+ExactValue exact_value_to_float(ExactValue v) {
+ switch (v.kind) {
+ case ExactValue_Integer:
+ return make_exact_value_float(cast(i64)v.value_integer);
+ case ExactValue_Float:
+ return v;
+ }
+ ExactValue r = {ExactValue_Invalid};
+ return r;
+}
+
+
+ExactValue exact_unary_operator_value(Token op, ExactValue v, i32 precision) {
+ switch (op.kind) {
+ case Token_Add: {
+ switch (v.kind) {
+ case ExactValue_Invalid:
+ case ExactValue_Integer:
+ case ExactValue_Float:
+ return v;
+ }
+ } break;
+
+ case Token_Sub: {
+ switch (v.kind) {
+ case ExactValue_Invalid:
+ return v;
+ case ExactValue_Integer: {
+ ExactValue i = v;
+ i.value_integer = -i.value_integer;
+ return i;
+ }
+ case ExactValue_Float: {
+ ExactValue i = v;
+ i.value_float = -i.value_float;
+ return i;
+ }
+ }
+ } break;
+
+ case Token_Xor: {
+ i64 i = 0;
+ switch (v.kind) {
+ case ExactValue_Invalid:
+ return v;
+ case ExactValue_Integer:
+ i = v.value_integer;
+ i = ~i;
+ break;
+ default:
+ goto failure;
+ }
+
+ // NOTE(bill): unsigned integers will be negative and will need to be
+ // limited to the types precision
+ if (precision > 0)
+ i &= ~((~0ll)<<precision);
+
+ return make_exact_value_integer(i);
+ } break;
+
+ case Token_Not: {
+ switch (v.kind) {
+ case ExactValue_Invalid: return v;
+ case ExactValue_Bool:
+ return make_exact_value_bool(!v.value_bool);
+ }
+ } break;
+ }
+
+failure:
+ GB_PANIC("Invalid unary operation, %.*s", LIT(token_strings[op.kind]));
+
+ ExactValue error_value = {0};
+ return error_value;
+}
+
+// NOTE(bill): Make sure things are evaluated in correct order
+i32 exact_value_order(ExactValue v) {
+ switch (v.kind) {
+ case ExactValue_Invalid:
+ return 0;
+ case ExactValue_Bool:
+ case ExactValue_String:
+ return 1;
+ case ExactValue_Integer:
+ return 2;
+ case ExactValue_Float:
+ return 3;
+ case ExactValue_Pointer:
+ return 4;
+
+ default:
+ GB_PANIC("How'd you get here? Invalid Value.kind");
+ return -1;
+ }
+}
+
+void match_exact_values(ExactValue *x, ExactValue *y) {
+ if (exact_value_order(*y) < exact_value_order(*x)) {
+ match_exact_values(y, x);
+ return;
+ }
+
+ switch (x->kind) {
+ case ExactValue_Invalid:
+ *y = *x;
+ return;
+
+ case ExactValue_Bool:
+ case ExactValue_String:
+ return;
+
+ case ExactValue_Integer:
+ switch (y->kind) {
+ case ExactValue_Integer:
+ return;
+ case ExactValue_Float:
+ // TODO(bill): Is this good enough?
+ *x = make_exact_value_float(cast(f64)x->value_integer);
+ return;
+ }
+ break;
+
+ case ExactValue_Float:
+ if (y->kind == ExactValue_Float)
+ return;
+ break;
+ }
+
+ compiler_error("How'd you get here? Invalid ExactValueKind");
+}
+
+// TODO(bill): Allow for pointer arithmetic? Or are pointer slices good enough?
+ExactValue exact_binary_operator_value(Token op, ExactValue x, ExactValue y) {
+ match_exact_values(&x, &y);
+
+ switch (x.kind) {
+ case ExactValue_Invalid:
+ return x;
+
+ case ExactValue_Bool:
+ switch (op.kind) {
+ case Token_CmpAnd: return make_exact_value_bool(x.value_bool && y.value_bool);
+ case Token_CmpOr: return make_exact_value_bool(x.value_bool || y.value_bool);
+ case Token_And: return make_exact_value_bool(x.value_bool & y.value_bool);
+ case Token_Or: return make_exact_value_bool(x.value_bool | y.value_bool);
+ default: goto error;
+ }
+ break;
+
+ case ExactValue_Integer: {
+ i64 a = x.value_integer;
+ i64 b = y.value_integer;
+ i64 c = 0;
+ switch (op.kind) {
+ case Token_Add: c = a + b; break;
+ case Token_Sub: c = a - b; break;
+ case Token_Mul: c = a * b; break;
+ case Token_Quo: return make_exact_value_float(fmod(cast(f64)a, cast(f64)b));
+ case Token_QuoEq: c = a / b; break; // NOTE(bill): Integer division
+ case Token_Mod: c = a % b; break;
+ case Token_And: c = a & b; break;
+ case Token_Or: c = a | b; break;
+ case Token_Xor: c = a ^ b; break;
+ case Token_AndNot: c = a&(~b); break;
+ case Token_Shl: c = a << b; break;
+ case Token_Shr: c = a >> b; break;
+ default: goto error;
+ }
+ return make_exact_value_integer(c);
+ } break;
+
+ case ExactValue_Float: {
+ f64 a = x.value_float;
+ f64 b = y.value_float;
+ switch (op.kind) {
+ case Token_Add: return make_exact_value_float(a + b);
+ case Token_Sub: return make_exact_value_float(a - b);
+ case Token_Mul: return make_exact_value_float(a * b);
+ case Token_Quo: return make_exact_value_float(a / b);
+ default: goto error;
+ }
+ } break;
+ }
+
+error:
+ ExactValue error_value = {0};
+ // gb_printf_err("Invalid binary operation: %s\n", token_kind_to_string(op.kind));
+ return error_value;
+}
+
+gb_inline ExactValue exact_value_add(ExactValue x, ExactValue y) { Token op = {Token_Add}; return exact_binary_operator_value(op, x, y); }
+gb_inline ExactValue exact_value_sub(ExactValue x, ExactValue y) { Token op = {Token_Sub}; return exact_binary_operator_value(op, x, y); }
+gb_inline ExactValue exact_value_mul(ExactValue x, ExactValue y) { Token op = {Token_Mul}; return exact_binary_operator_value(op, x, y); }
+gb_inline ExactValue exact_value_quo(ExactValue x, ExactValue y) { Token op = {Token_Quo}; return exact_binary_operator_value(op, x, y); }
+gb_inline ExactValue exact_value_shift(Token op, ExactValue x, ExactValue y) { return exact_binary_operator_value(op, x, y); }
+
+
+i32 cmp_f64(f64 a, f64 b) {
+ return (a > b) - (a < b);
+}
+
+bool compare_exact_values(Token op, ExactValue x, ExactValue y) {
+ match_exact_values(&x, &y);
+
+ switch (x.kind) {
+ case ExactValue_Invalid:
+ return false;
+
+ case ExactValue_Bool:
+ switch (op.kind) {
+ case Token_CmpEq: return x.value_bool == y.value_bool;
+ case Token_NotEq: return x.value_bool != y.value_bool;
+ }
+ break;
+
+ case ExactValue_Integer: {
+ i64 a = x.value_integer;
+ i64 b = y.value_integer;
+ switch (op.kind) {
+ case Token_CmpEq: return a == b;
+ case Token_NotEq: return a != b;
+ case Token_Lt: return a < b;
+ case Token_LtEq: return a <= b;
+ case Token_Gt: return a > b;
+ case Token_GtEq: return a >= b;
+ }
+ } break;
+
+ case ExactValue_Float: {
+ f64 a = x.value_float;
+ f64 b = y.value_float;
+ switch (op.kind) {
+ case Token_CmpEq: return cmp_f64(a, b) == 0;
+ case Token_NotEq: return cmp_f64(a, b) != 0;
+ case Token_Lt: return cmp_f64(a, b) < 0;
+ case Token_LtEq: return cmp_f64(a, b) <= 0;
+ case Token_Gt: return cmp_f64(a, b) > 0;
+ case Token_GtEq: return cmp_f64(a, b) >= 0;
+ }
+ } break;
+
+ case ExactValue_String: {
+ String a = x.value_string;
+ String b = y.value_string;
+ isize len = gb_min(a.len, b.len);
+ // TODO(bill): gb_memcompare is used because the strings are UTF-8
+ switch (op.kind) {
+ case Token_CmpEq: return gb_memcompare(a.text, b.text, len) == 0;
+ case Token_NotEq: return gb_memcompare(a.text, b.text, len) != 0;
+ case Token_Lt: return gb_memcompare(a.text, b.text, len) < 0;
+ case Token_LtEq: return gb_memcompare(a.text, b.text, len) <= 0;
+ case Token_Gt: return gb_memcompare(a.text, b.text, len) > 0;
+ case Token_GtEq: return gb_memcompare(a.text, b.text, len) >= 0;
+ }
+ } break;
+ }
+
+ GB_PANIC("Invalid comparison");
+ return false;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2026-02-15 05:06:19 +0000