Initial commitHEAD0.1.0master

1 files changed, 71 insertions, 0 deletions

diff --git a/examples/nolibc.c b/examples/nolibc.c
new file mode 100644
index 0000000..1a68383
--- /dev/null
+++ b/examples/nolibc.c
@@ -0,0 +1,71 @@
+#define assert(X) do { if (!(X)) __asm__("int3"); } while (0)
+
+#define IMXML_SIMD_DEFAULT SCALAR
+#define IMXML_NO_SUPPORT_SINGLE_QUOTES
+#define IMXML_NO_SUPPORT_COMMENTS
+#define IMXML_NO_SUPPORT_CDATA
+#define IMXML_NO_SUPPORT_ENTITIES
+#define IMXML_NO_SUPPORT_NAMESPACES
+#define THREADLOCAL
+#define IMXML_NO_CHECK_BOUNDS
+
+#define IMXML_IMPLEMENTATION
+#include "imxml.h"
+
+// some compilers require memset to be present
+void* memset (void* s, int c, size_t n) {
+    for (size_t i = 0; i < n; ++i) {
+        ((char*)s)[i] = c;
+    }
+    return s;
+}
+
+static void write (ImxmlString s) {
+    long ret;
+    __asm__ volatile(
+        "syscall"
+        : "=a"(ret)
+        : "a"(1), "D"(1), "S"(s.items), "d"(s.count)
+        : "rcx", "r11", "memory"
+    );
+}
+
+void start (void) {
+    static ImxmlCharSequence xml = "<msg from=\"John\" to=\"Jane\">Hello, World!</msg>"IMXML_LIT_PAD;
+
+    XmlParser p = {
+        .head = xml,
+    };
+
+    assert(xml_tag_expect(&p, "msg"));
+    assert(xml_attr_expect(&p, "from"));
+    ImxmlString const from = xml_value(&p);
+    assert(xml_attr_expect(&p, "to"));
+    ImxmlString const to = xml_value(&p);
+
+    XmlContent content = xml_content(&p);
+    assert(content.type == XML_CONTENT_TEXT);
+    ImxmlString const msg = content.data;
+
+    write(from);
+    write(imxml_strlit("->"));
+    write(to);
+    write(imxml_strlit(": "));
+    write(msg);
+    write(imxml_strlit("\n"));
+
+    __asm__ volatile(
+        "syscall\n"
+        :
+        : "a"(60), "D"(0)
+        : "rcx", "r11", "memory"
+    );
+}
+
+void _start (void) {
+    __asm__ volatile (
+        "andq $-16, %rsp\n" // required because the compiler emits aligned stack loads later
+        "call start\n"
+    );
+}
+