Tentatively adding vsscanf to win32 compilation. Untested tho.

1 files changed, 38 insertions, 0 deletions

diff --git a/win32-vsscanf.c b/win32-vsscanf.c
new file mode 100644
index 0000000..2391fb9
--- /dev/null
+++ b/win32-vsscanf.c
@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdarg.h>
+#include <malloc.h>
+#include <string.h>
+
+int vsscanf(const char * buffer, const char * format, va_list args) {
+    size_t count = 0;
+    const char * p = format;
+    char c;
+    while ((c = *p++))
+        if ((c == '%') && ((p[0]) != '*' && (p[0] != '%')))
+            count++;
+
+    const char ** new_stack = (const char **) alloca((count + 2) * sizeof(void *));
+
+    new_stack[0] = buffer;
+    new_stack[1] = format;
+    memcpy(new_stack + 2, args, count * sizeof(const char *));
+
+    int r;
+    void * old_stack;
+
+#ifdef __x86_64__
+#error "Not written yet."
+#else
+    asm (
+        "mov  %%esp, %0\n\t"
+        "mov  %2, %%esp\n\t"
+        "call sscanf\n\t"
+        "mov  %0, %%esp\n\t"
+        "mov  %%eax, %1\n\t"
+        : "=r"(old_stack), "=r"(r)
+        : "r"(new_stack)
+    );
+#endif
+
+    return r;
+}