From 03849b83b473f8fbc9c3aac34aa3da5c2e6b9ea3 Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Sun, 23 Jun 2024 00:58:46 -0700
Subject: [PATCH] add eatUntil

---
 intrusive_parser.zig | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/intrusive_parser.zig b/intrusive_parser.zig
index 81c72c65eabd614ee9ec070bb66fc9119a59d228..7d69a3acad8de491eee555c804398273622a7aeb 100644
--- a/intrusive_parser.zig
+++ b/intrusive_parser.zig
@@ -116,6 +116,23 @@ pub const Parser = struct {
         return amt;
     }
 
+    pub fn eatUntil(p: *Parser, test_c: u8) !?struct { usize, usize } {
+        const start = p.idx;
+        var len: usize = 0;
+        while (true) {
+            try p.peekAmt(1) orelse return null;
+            const amt = std.mem.indexOfScalar(u8, p.slice(), test_c) orelse {
+                const left = p.avail();
+                len += left;
+                p.idx += left;
+                continue;
+            };
+            len += amt;
+            p.idx += amt;
+            return .{ start, len };
+        }
+    }
+
     // tag(u8) + len(u32) + bytes(N)
     pub fn addStr(p: *Parser, alloc: std.mem.Allocator, str: string) !usize {
         const adapter: AdapterStr = .{ .p = p };
@@ -193,5 +210,9 @@ pub fn Mixin(comptime T: type) type {
         pub fn trimByte(pp: *T, test_c: u8) !usize {
             return pp.parser.trimByte(test_c);
         }
+
+        pub fn eatUntil(pp: *T, test_c: u8) !usize {
+            return pp.parser.eatUntil(test_c);
+        }
     };
 }
-- 
2.54.0