From 6f7e035c5107b7672056ec0300c911e4386ea388 Mon Sep 17 00:00:00 2001
From: Vincent Rischmann
Date: Wed, 30 Dec 2020 15:23:37 +0100
Subject: add Error, DetailedError

---
 sqlite.zig | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'sqlite.zig')

diff --git a/sqlite.zig b/sqlite.zig
index 4a65461..fd0877d 100644
--- a/sqlite.zig
+++ b/sqlite.zig
@@ -42,10 +42,38 @@ pub const InitOptions = struct {
     threading_mode: ThreadingMode = .Serialized,
 };
 
+pub const Error = error{};
+
+/// DetailedError contains a SQLite error code and error message.
+pub const DetailedError = struct {
+    code: usize,
+    message: []const u8,
+};
+
 fn isThreadSafe() bool {
     return c.sqlite3_threadsafe() > 0;
 }
 
+fn getDetailedErrorFromResultCode(code: c_int) DetailedError {
+    return .{
+        .code = @intCast(usize, code),
+        .message = blk: {
+            const msg = c.sqlite3_errstr(code);
+            break :blk mem.spanZ(msg);
+        },
+    };
+}
+
+fn getLastDetailedErrorFromDb(db: *c.sqlite3) DetailedError {
+    return .{
+        .code = @intCast(usize, c.sqlite3_extended_errcode(db)),
+        .message = blk: {
+            const msg = c.sqlite3_errmsg(db);
+            break :blk mem.spanZ(msg);
+        },
+    };
+}
+
 /// Db is a wrapper around a SQLite database, providing high-level functions for executing queries.
 /// A Db can be opened with a file database or a in-memory database:
 ///
@@ -127,6 +155,11 @@ pub const Db = struct {
         _ = c.sqlite3_close(self.db);
     }
 
+    // getDetailedError returns the detailed error for the last API call if it failed.
+    pub fn getDetailedError(self: *Self) DetailedError {
+        return getLastDetailedErrorFromDb(self.db);
+    }
+
     /// pragma is a convenience function to use the PRAGMA statement.
     ///
     /// Here is how to set a pragma value:
-- 
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