Add calloc

.clangd

@@ -0,0 +1,13 @@
+If:
+  PathMatch: .*\.cpp
+
+CompileFlags:
+  Add: [-std=c++23]
+
+---
+
+If:
+  PathMatch: .*\.c
+
+CompileFlags:
+  Add: [-std=c23]

build/assets/include/stdlib.h

@@ -16,11 +16,12 @@ extern unsigned char __heap_base;
 #define IMPORT(name) __attribute__((import_module("env"), import_name(#name)))
 #define EXPORT(name) __attribute__((export_name(#name)))
 
-void* malloc(size_t);
+void* malloc(size_t size);
-void free(void*);
+void* calloc(size_t n, size_t size);
-void* realloc(void*, size_t);
+void* realloc(void* ptr, size_t size);
+void free(void* ptr);
 
-void* memset(void* d, uint8_t c, size_t n);
+void* memset(void* dest, uint8_t ch, size_t n);
 void* memcpy(void* dest, const void* src, size_t n);
 int memcmp(const void* s1, const void* s2, size_t n);
 

build/assets/lib/stdlib.c

@@ -139,6 +139,20 @@ void* realloc(void* block, size_t size) {
     return ret;
 }
 
+void* calloc(size_t n, size_t size) {
+    const size_t s = n * size;
+    if (s == 0) {
+        return NULL;
+    }
+
+    void* ret = malloc(n * size);
+    if (ret) {
+        memset(ret, 0, n * size);
+    }
+
+    return ret;
+}
+
 void* memset(void* d, uint8_t c, size_t n) {
     uint8_t* p = (uint8_t*)d;
     while (n--) {

compile_flags.txt

@@ -1,5 +1,4 @@
 --target=wasm32
--std=gnu++23
 -fno-builtin
 --no-standard-libraries
 -I