Fix erroneous assertions

Since PHP strings are binary safe (i.e. they may contain NUL bytes), we must not assume that strlen()/wcslen() actually return the length of the string. Only if the given in_len is zero, it is safe to assert this.

Author: cmb69

win32/codepage.c

@@ -63,7 +63,7 @@ __forceinline static wchar_t *php_win32_cp_to_w_int(const char* in, size_t in_le
 }
 
 assert(ret ? tmp_len == ret_len : 1);
-assert(ret ? wcslen(ret) == ret_len - 1 : 1);
+assert(ret && !in_len ? wcslen(ret) == ret_len - 1 : 1);
 
 ret[ret_len-1] = L'\0';
 
@@ -97,7 +97,10 @@ PW32CP wchar_t *php_win32_cp_conv_ascii_to_w(const char* in, size_t in_len, size
 {/*{{{*/
 wchar_t *ret = NULL;
 const char *idx = in, *end;
-
+#if PHP_DEBUG
+size_t save_in_len = in_len;
+#endif
+ 
 assert(in && in_len ? in[in_len] == '\0' : 1);
 
 if (!in) {
@@ -154,7 +157,7 @@ PW32CP wchar_t *php_win32_cp_conv_ascii_to_w(const char* in, size_t in_len, size
 } while (i < in_len);
 ret[in_len] = L'\0';
 
-assert(ret ? wcslen(ret) == in_len : 1);
+assert(ret && !save_in_len ? wcslen(ret) == in_len : 1);
 
 if (PHP_WIN32_CP_IGNORE_LEN_P != out_len) {
 *out_len = in_len;
@@ -202,7 +205,7 @@ __forceinline static char *php_win32_cp_from_w_int(const wchar_t* in, size_t in_
 }
 
 assert(target ? r == target_len : 1);
-assert(target ? strlen(target) == target_len - 1 : 1);
+assert(target && !in_len ? strlen(target) == target_len - 1 : 1);
 
 target[target_len-1] = '\0';