From d046c97c1f7d923af215cedf3e54b446afeeed93 Mon Sep 17 00:00:00 2001
From: Sasha Koss <koss@nocorp.me>
Date: Mon, 22 Dec 2025 08:02:06 +0000
Subject: [PATCH 1/2] Make __assert_fail static inline to avoid duplicate
 symbol rust-lld error

---
 crates/language/wasm/include/assert.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/language/wasm/include/assert.h b/crates/language/wasm/include/assert.h
index e981a20e..b1ef2f93 100644
--- a/crates/language/wasm/include/assert.h
+++ b/crates/language/wasm/include/assert.h
@@ -4,7 +4,7 @@
 #ifdef NDEBUG
 #define assert(e) ((void)0)
 #else
-__attribute__((noreturn)) void __assert_fail(const char *assertion, const char *file, unsigned line, const char *function) {
+__attribute__((noreturn)) static inline void __assert_fail(const char *assertion, const char *file, unsigned line, const char *function) {
     __builtin_trap();
 }
 #define assert(expression) \

From 134a7681721a4c2aba2e499630c34dc0cb54f1f8 Mon Sep 17 00:00:00 2001
From: Sasha Koss <koss@nocorp.me>
Date: Mon, 22 Dec 2025 08:53:58 +0000
Subject: [PATCH 2/2] Add missing Wasm shims required by tree-sitter-ruby

---
 crates/language/wasm/include/string.h |  4 ++++
 crates/language/wasm/include/wctype.h |  6 ++++++
 crates/language/wasm/src/string.c     | 18 ++++++++++++++++++
 crates/language/wasm/src/wctype.c     |  9 +++++++++
 lib/binding_rust/build.rs             |  1 +
 5 files changed, 38 insertions(+)
 create mode 100644 crates/language/wasm/src/wctype.c

diff --git a/crates/language/wasm/include/string.h b/crates/language/wasm/include/string.h
index 2d576f08..d9d10ed8 100644
--- a/crates/language/wasm/include/string.h
+++ b/crates/language/wasm/include/string.h
@@ -3,6 +3,8 @@
 
 #include <stdint.h>
 
+void *memchr(const void *src, int c, size_t n);
+
 int memcmp(const void *lhs, const void *rhs, size_t count);
 
 void *memcpy(void *restrict dst, const void *restrict src, size_t size);
@@ -13,4 +15,6 @@ void *memset(void *dst, int value, size_t count);
 
 int strncmp(const char *left, const char *right, size_t n);
 
+char *strchr(const char *str, int c);
+
 #endif // TREE_SITTER_WASM_STRING_H_
diff --git a/crates/language/wasm/include/wctype.h b/crates/language/wasm/include/wctype.h
index 8d1e8c82..11029092 100644
--- a/crates/language/wasm/include/wctype.h
+++ b/crates/language/wasm/include/wctype.h
@@ -1,8 +1,14 @@
 #ifndef TREE_SITTER_WASM_WCTYPE_H_
 #define TREE_SITTER_WASM_WCTYPE_H_
 
+#include <stdbool.h>
+
 typedef int wint_t;
 
+int iswlower(wint_t wch);
+
+int iswupper(wint_t wch);
+
 static inline bool iswalpha(wint_t wch) {
   switch (wch) {
   case L'a':
diff --git a/crates/language/wasm/src/string.c b/crates/language/wasm/src/string.c
index 0fcf4b85..f3992e4a 100644
--- a/crates/language/wasm/src/string.c
+++ b/crates/language/wasm/src/string.c
@@ -1,5 +1,13 @@
 #include <string.h>
 
+// Derived from musl (MIT): https://git.musl-libc.org/cgit/musl/tree/src/string/memchr.c
+void *memchr(const void *src, int c, size_t n) {
+	const unsigned char *s = src;
+	c = (unsigned char)c;
+	for (; n && *s != c; s++, n--);
+	return n ? (void *)s : 0;
+}
+
 int memcmp(const void *lhs, const void *rhs, size_t count) {
   const unsigned char *l = lhs;
   const unsigned char *r = rhs;
@@ -58,3 +66,13 @@ int strncmp(const char *left, const char *right, size_t n) {
   }
   return 0;
 }
+
+char *strchr(const char *str, int c) {
+  while (*str != (char)c) {
+    if (*str == '\0') {
+      return 0;
+    }
+    str++;
+  }
+  return (char *)str;
+}
diff --git a/crates/language/wasm/src/wctype.c b/crates/language/wasm/src/wctype.c
new file mode 100644
index 00000000..34b60e0f
--- /dev/null
+++ b/crates/language/wasm/src/wctype.c
@@ -0,0 +1,9 @@
+#include <wctype.h>
+
+int iswlower(wint_t wch) {
+    return (unsigned)wch - L'a' < 26;
+}
+
+int iswupper(wint_t wch) {
+    return (unsigned)wch - L'A' < 26;
+}
diff --git a/lib/binding_rust/build.rs b/lib/binding_rust/build.rs
index 624001bc..d2485115 100644
--- a/lib/binding_rust/build.rs
+++ b/lib/binding_rust/build.rs
@@ -70,6 +70,7 @@ fn configure_wasm_build(config: &mut cc::Build) {
         wasm_src.join("stdio.c"),
         wasm_src.join("stdlib.c"),
         wasm_src.join("string.c"),
+        wasm_src.join("wctype.c"),
     ]);
 }