Remove the need for `rand` in `core:math/big`

core/math/big/helpers.odin

@@ -362,11 +362,11 @@ platform_count_lsb :: #force_inline proc(a: $T) -> (count: int)
 
 count_lsb :: proc { int_count_lsb, platform_count_lsb, }
 
-int_random_digit :: proc(r: ^rnd.Rand = nil) -> (res: DIGIT) {
+int_random_digit :: proc() -> (res: DIGIT) {
 	when _DIGIT_BITS == 60 { // DIGIT = u64
-		return DIGIT(rnd.uint64(r)) & _MASK
+		return DIGIT(rnd.uint64()) & _MASK
 	} else when _DIGIT_BITS == 28 { // DIGIT = u32
-		return DIGIT(rnd.uint32(r)) & _MASK
+		return DIGIT(rnd.uint32()) & _MASK
 	} else {
 		panic("Unsupported DIGIT size.")
 	}
@@ -374,12 +374,12 @@ int_random_digit :: proc(r: ^rnd.Rand = nil) -> (res: DIGIT) {
 	return 0 // We shouldn't get here.
 }
 
-int_random :: proc(dest: ^Int, bits: int, r: ^rnd.Rand = nil, allocator := context.allocator) -> (err: Error) {
+int_random :: proc(dest: ^Int, bits: int, allocator := context.allocator) -> (err: Error) {
 	/*
 		Check that `a` is usable.
 	*/
 	assert_if_nil(dest)
-	return #force_inline internal_int_random(dest, bits, r, allocator)
+	return #force_inline internal_int_random(dest, bits, allocator)
 
 }
 random :: proc { int_random, }

core/math/big/internal.odin

@@ -2817,11 +2817,11 @@ internal_platform_count_lsb :: #force_inline proc(a: $T) -> (count: int)
 
 internal_count_lsb :: proc { internal_int_count_lsb, internal_platform_count_lsb, }
 
-internal_int_random_digit :: proc(r: ^rnd.Rand = nil) -> (res: DIGIT) {
+internal_int_random_digit :: proc() -> (res: DIGIT) {
 	when _DIGIT_BITS == 60 { // DIGIT = u64
-		return DIGIT(rnd.uint64(r)) & _MASK
+		return DIGIT(rnd.uint64()) & _MASK
 	} else when _DIGIT_BITS == 28 { // DIGIT = u32
-		return DIGIT(rnd.uint32(r)) & _MASK
+		return DIGIT(rnd.uint32()) & _MASK
 	} else {
 		panic("Unsupported DIGIT size.")
 	}
@@ -2829,7 +2829,7 @@ internal_int_random_digit :: proc(r: ^rnd.Rand = nil) -> (res: DIGIT) {
 	return 0 // We shouldn't get here.
 }
 
-internal_int_random :: proc(dest: ^Int, bits: int, r: ^rnd.Rand = nil, allocator := context.allocator) -> (err: Error) {
+internal_int_random :: proc(dest: ^Int, bits: int, allocator := context.allocator) -> (err: Error) {
 	context.allocator = allocator
 
 	bits := bits
@@ -2846,7 +2846,7 @@ internal_int_random :: proc(dest: ^Int, bits: int, r: ^rnd.Rand = nil, allocator
 	#force_inline internal_grow(dest, digits) or_return
 
 	for i := 0; i < digits; i += 1 {
-		dest.digit[i] = int_random_digit(r) & _MASK
+		dest.digit[i] = int_random_digit() & _MASK
 	}
 	if bits > 0 {
 		dest.digit[digits - 1] &= ((1 << uint(bits)) - 1)

core/math/big/prime.odin

@@ -12,8 +12,6 @@
 
 package math_big
 
-import rnd "core:math/rand"
-
 /*
 	Determines if an Integer is divisible by one of the _PRIME_TABLE primes.
 	Returns true if it is, false if not. 
@@ -315,7 +313,7 @@ internal_int_prime_miller_rabin :: proc(a, b: ^Int, allocator := context.allocat
 
 	Assumes `a` not to be `nil` and to have been initialized.
 */
-internal_int_is_prime :: proc(a: ^Int, miller_rabin_trials := int(-1), miller_rabin_only := USE_MILLER_RABIN_ONLY, r: ^rnd.Rand = nil, allocator := context.allocator) -> (is_prime: bool, err: Error) {
+internal_int_is_prime :: proc(a: ^Int, miller_rabin_trials := int(-1), miller_rabin_only := USE_MILLER_RABIN_ONLY, allocator := context.allocator) -> (is_prime: bool, err: Error) {
 	context.allocator = allocator
 	miller_rabin_trials := miller_rabin_trials
 
@@ -461,7 +459,7 @@ internal_int_is_prime :: proc(a: ^Int, miller_rabin_trials := int(-1), miller_ra
 		for ix := 0; ix < miller_rabin_trials; ix += 1 {
 
 			// rand() guarantees the first digit to be non-zero
-			internal_random(b, _DIGIT_TYPE_BITS, r) or_return
+			internal_random(b, _DIGIT_TYPE_BITS) or_return
 
 			// Reduce digit before casting because DIGIT might be bigger than
 			// an unsigned int and "mask" on the other side is most probably not.
@@ -1183,7 +1181,7 @@ internal_int_prime_next_prime :: proc(a: ^Int, trials: int, bbs_style: bool, all
 
 	This is possibly the mother of all prime generation functions, muahahahahaha!
 */
-internal_random_prime :: proc(a: ^Int, size_in_bits: int, trials: int, flags := Primality_Flags{}, r: ^rnd.Rand = nil, allocator := context.allocator) -> (err: Error) {
+internal_random_prime :: proc(a: ^Int, size_in_bits: int, trials: int, flags := Primality_Flags{}, allocator := context.allocator) -> (err: Error) {
 	context.allocator = allocator
 	flags  := flags
 	trials := trials

core/math/rand/rand.odin

@@ -6,7 +6,6 @@ package rand
 
 import "base:intrinsics"
 import "base:runtime"
-import "core:crypto"
 import "core:math"
 import "core:mem"