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use llvm_sys::core::{LLVMIsAConstantArray, LLVMIsAConstantDataArray, LLVMIsConstantString, LLVMGetAsString};
use llvm_sys::prelude::LLVMValueRef;
use std::ffi::CStr;
use std::fmt::{self, Display};
use crate::types::ArrayType;
use crate::values::traits::{AnyValue, AsValueRef};
use crate::values::{InstructionValue, Value};
/// An `ArrayValue` is a block of contiguous constants or variables.
#[derive(PartialEq, Eq, Clone, Copy, Hash)]
pub struct ArrayValue<'ctx> {
array_value: Value<'ctx>,
}
impl<'ctx> ArrayValue<'ctx> {
pub(crate) unsafe fn new(value: LLVMValueRef) -> Self {
assert!(!value.is_null());
ArrayValue {
array_value: Value::new(value),
}
}
/// Get name of the `ArrayValue`. If the value is a constant, this will
/// return an empty string.
pub fn get_name(&self) -> &CStr {
self.array_value.get_name()
}
/// Set name of the `ArrayValue`.
pub fn set_name(&self, name: &str) {
self.array_value.set_name(name)
}
/// Gets the type of this `ArrayValue`.
pub fn get_type(self) -> ArrayType<'ctx> {
unsafe { ArrayType::new(self.array_value.get_type()) }
}
/// Determines whether or not this value is null.
pub fn is_null(self) -> bool {
self.array_value.is_null()
}
/// Determines whether or not this value is undefined.
pub fn is_undef(self) -> bool {
self.array_value.is_undef()
}
/// Prints this `ArrayValue` to standard error.
pub fn print_to_stderr(self) {
self.array_value.print_to_stderr()
}
/// Attempt to convert this `ArrayValue` to an `InstructionValue`, if possible.
pub fn as_instruction(self) -> Option<InstructionValue<'ctx>> {
self.array_value.as_instruction()
}
/// Replaces all uses of this value with another value of the same type.
/// If used incorrectly this may result in invalid IR.
pub fn replace_all_uses_with(self, other: ArrayValue<'ctx>) {
self.array_value.replace_all_uses_with(other.as_value_ref())
}
/// Determines whether or not an `ArrayValue` is a constant.
///
/// # Example
///
/// ```no_run
/// use inkwell::context::Context;
///
/// let context = Context::create();
/// let i64_type = context.i64_type();
/// let i64_val = i64_type.const_int(23, false);
/// let array_val = i64_type.const_array(&[i64_val]);
///
/// assert!(array_val.is_const());
/// ```
pub fn is_const(self) -> bool {
self.array_value.is_const()
}
/// Determines whether or not an `ArrayValue` represents a constant array of `i8`s.
///
/// # Example
///
/// ```no_run
/// use inkwell::context::Context;
///
/// let context = Context::create();
/// let string = context.const_string(b"my_string", false);
///
/// assert!(string.is_const_string());
/// ```
// SubTypes: Impl only for ArrayValue<IntValue<i8>>
pub fn is_const_string(self) -> bool {
unsafe { LLVMIsConstantString(self.as_value_ref()) == 1 }
}
/// Obtain the string from the ArrayValue
/// if the value points to a constant string.
///
/// # Example
///
/// ```no_run
/// use inkwell::context::Context;
/// use std::ffi::CStr;
///
/// let context = Context::create();
/// let string = context.const_string(b"hello!", true);
///
/// let result = CStr::from_bytes_with_nul(b"hello!\0").unwrap();
/// assert_eq!(string.get_string_constant(), Some(result));
/// ```
// SubTypes: Impl only for ArrayValue<IntValue<i8>>
pub fn get_string_constant(&self) -> Option<&CStr> {
let mut len = 0;
let ptr = unsafe { LLVMGetAsString(self.as_value_ref(), &mut len) };
if ptr.is_null() {
None
} else {
unsafe { Some(CStr::from_ptr(ptr)) }
}
}
/// Determines whether or not an `ArrayValue` is a constant data array.
pub fn is_const_data_array(self) -> bool {
unsafe { !LLVMIsAConstantDataArray(self.as_value_ref()).is_null() }
}
}
unsafe impl AsValueRef for ArrayValue<'_> {
fn as_value_ref(&self) -> LLVMValueRef {
self.array_value.value
}
}
impl Display for ArrayValue<'_> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.print_to_string())
}
}
impl fmt::Debug for ArrayValue<'_> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let llvm_value = self.print_to_string();
let llvm_type = self.get_type();
let name = self.get_name();
let is_const = self.is_const();
let is_null = self.is_null();
let is_const_array = unsafe { !LLVMIsAConstantArray(self.as_value_ref()).is_null() };
let is_const_data_array = self.is_const_data_array();
f.debug_struct("ArrayValue")
.field("name", &name)
.field("address", &self.as_value_ref())
.field("is_const", &is_const)
.field("is_const_array", &is_const_array)
.field("is_const_data_array", &is_const_data_array)
.field("is_null", &is_null)
.field("llvm_value", &llvm_value)
.field("llvm_type", &llvm_type)
.finish()
}
}