refactor: switch export database from markdown to JSON parsing

Add serde/serde_json for structured parsing of the export database,
replacing the hand-rolled markdown table parser with type-safe JSON
deserialization.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Cargo.lock

@@ -194,6 +194,12 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6cb138bb79a146c1bd460005623e142ef0181e3d0219cb493e02f7d08a35695"
 
+[[package]]
+name = "itoa"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
+
 [[package]]
 name = "libc"
 version = "0.2.183"
@@ -206,6 +212,12 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b29dffab797218e12e4df08ef5d15ab9efca2504038b1b32b9b32fc844b39c9"
 
+[[package]]
+name = "memchr"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
+
 [[package]]
 name = "once_cell_polyfill"
 version = "1.70.2"
@@ -230,6 +242,49 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "serde"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_core"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d385c7d4ca58e59fc732af25c3983b67ac852c1a25000afe1175de458b67ad"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d540f220d3187173da220f885ab66608367b6574e925011a9353e4badda91d79"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.149"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
+dependencies = [
+ "itoa",
+ "memchr",
+ "serde",
+ "serde_core",
+ "zmij",
+]
+
 [[package]]
 name = "strsim"
 version = "0.11.1"
@@ -288,10 +343,18 @@ dependencies = [
 
 [[package]]
 name = "xex2tractor"
-version = "0.8.0"
+version = "0.8.1"
 dependencies = [
  "aes",
  "cbc",
  "clap",
  "lzxd",
+ "serde",
+ "serde_json",
 ]
+
+[[package]]
+name = "zmij"
+version = "1.0.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "xex2tractor"
-version = "0.8.0"
+version = "0.8.1"
 edition = "2024"
 description = "A tool for extracting and inspecting Xbox 360 XEX2 executable files"
 license = "MIT"
@@ -10,3 +10,5 @@ aes = "0.8.4"
 cbc = "0.1.2"
 clap = { version = "4.6.0", features = ["derive"] }
 lzxd = "0.2.6"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"

src/exports.rs

@@ -1,13 +1,15 @@
 /// Xbox 360 system export database.
 ///
-/// Parses the embedded `doc/xbox360_exports.md` at first access and provides
+/// Parses the embedded `doc/xbox360_exports.json` at first access and provides
 /// ordinal-to-name lookups for xboxkrnl.exe, xam.xex, and xbdm.xex.
 use std::collections::HashMap;
 use std::sync::OnceLock;
 
+use serde::Deserialize;
+
 static EXPORT_DB: OnceLock<ExportDatabase> = OnceLock::new();
 
-const EXPORTS_MD: &str = include_str!("../doc/xbox360_exports.md");
+const EXPORTS_JSON: &str = include_str!("../doc/xbox360_exports.json");
 
 /// Information about a single Xbox 360 system export.
 #[derive(Debug, Clone)]
@@ -46,77 +48,52 @@ pub fn lookup(library: &str, ordinal: u16) -> Option<&'static ExportInfo> {
 }
 
 fn get_db() -> &'static ExportDatabase {
-    EXPORT_DB.get_or_init(|| parse_exports_md(EXPORTS_MD))
+    EXPORT_DB.get_or_init(|| parse_exports_json(EXPORTS_JSON))
 }
 
-/// Parses the markdown export database into a lookup structure.
+#[derive(Deserialize)]
-///
+struct JsonRoot {
-/// Expected format per module section:
+    modules: HashMap<String, JsonModule>,
-/// ```text
+}
-/// ## module_name (filename.exe)
+
-/// ...
+#[derive(Deserialize)]
-/// | 0xNNN | FunctionName | function | status | ... |
+struct JsonModule {
-/// ```
+    file: String,
-fn parse_exports_md(md: &str) -> ExportDatabase {
+    exports: Vec<JsonExport>,
+}
+
+#[derive(Deserialize)]
+struct JsonExport {
+    ordinal: u32,
+    name: String,
+    #[serde(rename = "type")]
+    export_type: String,
+}
+
+fn parse_exports_json(json: &str) -> ExportDatabase {
+    let root: JsonRoot = serde_json::from_str(json).expect("invalid exports JSON");
     let mut modules: HashMap<String, HashMap<u16, ExportInfo>> = HashMap::new();
-    let mut current_file: Option<String> = None;
 
-    for line in md.lines() {
+    for module in root.modules.values() {
-        // Detect section headers: "## xboxkrnl (xboxkrnl.exe)"
+        let file_key = module.file.to_ascii_lowercase();
-        if let Some(rest) = line.strip_prefix("## ") {
+        let entries = modules.entry(file_key).or_default();
-            if let (Some(paren_start), Some(paren_end)) =
+
-                (rest.find('('), rest.find(')'))
+        for export in &module.exports {
-            {
+            let ordinal = export.ordinal as u16;
-                let filename = rest[paren_start + 1..paren_end].trim().to_ascii_lowercase();
+            entries.insert(
-                current_file = Some(filename);
+                ordinal,
-            } else {
+                ExportInfo {
-                current_file = None;
+                    ordinal,
-            }
+                    name: export.name.clone(),
-            continue;
+                    is_function: export.export_type == "function",
+                },
+            );
         }
-
-        // Parse table rows: "| 0xNNN | Name | function/variable | ... |"
-        let Some(ref file) = current_file else {
-            continue;
-        };
-        if !line.starts_with("| 0x") {
-            continue;
-        }
-
-        let cols: Vec<&str> = line.split('|').collect();
-        // cols[0] is empty (before first |), cols[1] = ordinal, cols[2] = name, cols[3] = type
-        if cols.len() < 4 {
-            continue;
-        }
-
-        let ordinal_str = cols[1].trim();
-        let name = cols[2].trim();
-        let type_str = cols[3].trim();
-
-        let Some(ordinal) = parse_hex_ordinal(ordinal_str) else {
-            continue;
-        };
-
-        let entry = ExportInfo {
-            ordinal,
-            name: name.to_string(),
-            is_function: type_str == "function",
-        };
-
-        modules
-            .entry(file.clone())
-            .or_default()
-            .insert(ordinal, entry);
     }
 
     ExportDatabase { modules }
 }
 
-fn parse_hex_ordinal(s: &str) -> Option<u16> {
-    let hex = s.strip_prefix("0x").or_else(|| s.strip_prefix("0X"))?;
-    u16::from_str_radix(hex, 16).ok()
-}
-
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -182,13 +159,4 @@ mod tests {
     fn test_lookup_unknown_library() {
         assert!(lookup("nonexistent.dll", 0x001).is_none());
     }
-
-    #[test]
-    fn test_parse_hex_ordinal() {
-        assert_eq!(parse_hex_ordinal("0x001"), Some(1));
-        assert_eq!(parse_hex_ordinal("0x3A3"), Some(0x3A3));
-        assert_eq!(parse_hex_ordinal("0xFFFF"), Some(0xFFFF));
-        assert_eq!(parse_hex_ordinal("invalid"), None);
-        assert_eq!(parse_hex_ordinal(""), None);
-    }
 }