BitVecFromInteger

                bit_len = 4;
    
            *bv = BitVecFromInteger(value, bit_len, BitVecAllocator(bv));
            StrDeinit(&hex_str);
            return StrIterDataAt(&si, StrIterIndex(&si));

                bit_len = 3;
    
            *bv = BitVecFromInteger(value, bit_len, BitVecAllocator(bv));
            StrDeinit(&oct_str);
            return StrIterDataAt(&si, StrIterIndex(&si));

        DefaultAllocator alloc = DefaultAllocatorInit();
    
        WriteFmt("Testing BitVecFromInteger\n");
    
        // Convert from integer

    
        // Test integer to bitvec with 0
        BitVec bv2 = BitVecFromInteger(0, 8, ALLOCATOR_OF(&alloc)); // 8 bits for zero
        result     = result && (BitVecLen(&bv2) == 8);              // Should be 8 bits
        BitVecDeinit(&bv2);

    
        // Test large integer
        BitVec bv3 = BitVecFromInteger(UINT64_MAX, 64, ALLOCATOR_OF(&alloc)); // 64 bits for max value
        result     = result && (BitVecLen(&bv3) == 64);
        BitVecDeinit(&bv3);

                value    &= mask;
    
                BitVec bv        = BitVecFromInteger(value, bits, ALLOCATOR_OF(&alloc));
                u64    recovered = BitVecToInteger(&bv);

    
        // Test large integer conversion (should cap at 64 bits)
        BitVec large_bv = BitVecFromInteger(0xFFFFFFFFFFFFFFFF, 64, ALLOCATOR_OF(&alloc));
        result          = result && (BitVecLen(&large_bv) == 64);

        //   FromBytes({0xD6}, 8)    -> bit[i]=(0xD6>>i)&1        -> "01101011"
        BitVec bv1 = BitVecFromStr("11010110", ALLOCATOR_OF(&alloc));
        BitVec bv2 = BitVecFromInteger(0xD6, 8, ALLOCATOR_OF(&alloc));
        BitVec bv3 = BitVecFromBytes((u8[]) {0xD6}, 8, ALLOCATOR_OF(&alloc));

        StrClear(&output);
    
        BitVec bv2 = BitVecFromInteger(0xABCD, 16, alloc_base);
        StrAppendFmt(&output, "{x}", bv2);
        success = success && (ZstrCompare(StrBegin(&output), "0xabcd") == 0);

        StrClear(&output);
    
        BitVec bv3 = BitVecFromInteger(0755, 10, alloc_base);
        StrAppendFmt(&output, "{o}", bv3);
        success = success && (ZstrCompare(StrBegin(&output), "0o755") == 0);

        StrClear(&output);
    
        BitVec bv_zero = BitVecFromInteger(0, 1, alloc_base);
        StrAppendFmt(&output, "{x}", bv_zero);
        success = success && (ZstrCompare(StrBegin(&output), "0x0") == 0);