add some display logic into arch

2 files changed, 116 insertions, 0 deletions

diff --git a/src/display.rs b/src/display.rs
new file mode 100644
index 0000000..7dcdfb5
--- /dev/null
+++ b/src/display.rs
@@ -0,0 +1,115 @@
+pub enum NumberStyleHint {
+    Signed,
+    HexSigned,
+    SignedWithSign,
+    HexSignedWithSign,
+    SignedWithSignSplit,
+    HexSignedWithSignSplit,
+    Unsigned,
+    HexUnsigned,
+    UnsignedWithSign,
+    HexUnsignedWithSign
+}
+
+pub fn format_number_i32(i: i32, hint: NumberStyleHint) -> String {
+    match hint {
+        NumberStyleHint::Signed => {
+            format!("{}", i)
+        },
+        NumberStyleHint::HexSigned => {
+            if i == std::i32::MIN {
+                format!("-0x7fffffff")
+            } else if i < 0 {
+                format!("-{:#x}", -i)
+            } else {
+                format!("{:#x}", i)
+            }
+        },
+        NumberStyleHint::Unsigned => {
+            format!("{}", i as u32)
+        },
+        NumberStyleHint::HexUnsigned => {
+            format!("{:#x}", i as u32)
+        },
+        NumberStyleHint::SignedWithSignSplit => {
+            if i == std::i32::MIN {
+                format!("- 2147483647")
+            } else if i < 0 {
+                format!("- {}", -i)
+            } else {
+                format!("+ {}", i)
+            }
+        }
+        NumberStyleHint::HexSignedWithSignSplit => {
+            if i == std::i32::MIN {
+                format!("- 0x7fffffff")
+            } else if i < 0 {
+                format!("- {:#x}", -i)
+            } else {
+                format!("+ {:#x}", i)
+            }
+        },
+        NumberStyleHint::HexSignedWithSign => {
+            if i == std::i32::MIN {
+                format!("-0x7fffffff")
+            } else if i < 0 {
+                format!("-{:#x}", -i)
+            } else {
+                format!("+{:#x}", i)
+            }
+        },
+        NumberStyleHint::SignedWithSign => {
+            format!("{:+}", i)
+        }
+        NumberStyleHint::HexUnsignedWithSign => {
+            format!("{:+#x}", i as u32)
+        },
+        NumberStyleHint::UnsignedWithSign => {
+            format!("{:+}", i as u32)
+        }
+    }
+}
+
+pub fn signed_i8_hex(imm: i8) -> String {
+    let (sign, imm) = if imm == std::i8::MIN {
+        (false, imm)
+    } else if imm < 0 {
+        (true, -imm)
+    } else {
+        (false, imm)
+    };
+    format!("{}{:#x}", sign, imm)
+}
+
+pub fn signed_i16_hex(imm: i16) -> String {
+    let (sign, imm) = if imm == std::i16::MIN {
+        (false, imm)
+    } else if imm < 0 {
+        (true, -imm)
+    } else {
+        (false, imm)
+    };
+    format!("{}{:#x}", sign, imm)
+}
+
+pub fn signed_i32_hex(imm: i32) -> String {
+    let (sign, imm) = if imm == std::i32::MIN {
+        (false, imm)
+    } else if imm < 0 {
+        (true, -imm)
+    } else {
+        (false, imm)
+    };
+    format!("{}{:#x}", sign, imm)
+}
+
+pub fn signed_i64_hex(imm: i64) -> String {
+    let (sign, imm) = if imm == std::i64::MIN {
+        (false, imm)
+    } else if imm < 0 {
+        (true, -imm)
+    } else {
+        (false, imm)
+    };
+    format!("{}{:#x}", sign, imm)
+}
diff --git a/src/lib.rs b/src/lib.rs
index f11c9d5..35944a6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -14,6 +14,7 @@ use num_traits::{Bounded, WrappingAdd, WrappingSub, CheckedAdd, CheckedSub};
 
 use termion::color;
 
+pub mod display;
                                                              // This is pretty wonk..
 pub trait AddressDisplay {
     fn stringy(&self) -> String;