1 files changed, 62 insertions, 0 deletions
diff --git a/include/libfmt.h b/include/libfmt.h
new file mode 100644
index 0000000..17effc6
--- /dev/null
+++ b/include/libfmt.h
@@ -0,0 +1,62 @@
+#pragma once
+
+typedef struct fmt·State fmt·State;
+
+struct fmt·State
+{
+    struct{
+        char *beg;
+        char *cur;
+        char *end;
+    } buffer;
+    int (*flush)(fmt·State *);
+    int n;
+    va_list args;
+    rune  verb;
+    ulong flag;
+    int  width;
+    int  prec;
+};
+
+#define iota(x) (1 << (x))
+enum
+{
+    fmt·Width    = iota(0),
+    fmt·Left     = iota(1),
+    fmt·Prec     = iota(2),
+    fmt·Sharp    = iota(3),
+    fmt·Space    = iota(4),
+    fmt·Sign     = iota(5),
+    fmt·Apost    = iota(6),
+    fmt·Zero     = iota(7),
+    fmt·Unsigned = iota(8),
+    fmt·Short    = iota(9),
+    fmt·Long     = iota(10),
+    fmt·Vlong    = iota(11),
+    fmt·Comma    = iota(12),
+    fmt·Byte     = iota(13),
+    fmt·Ldouble  = iota(14),
+    fmt·Flag     = iota(15),
+};
+#undef iota
+
+/* normal printing interface */
+int fmt·print(char *fmt, ...);
+int fmt·fprint(int fd, char *fmt, ...);
+
+int fmt·sprint(char *buf, char *fmt, ...);
+int fmt·nsprint(int len, char *buf, char *fmt, ...);
+int fmt·esprint(char *buf, char *end, char *fmt, ...);
+
+int fmt·vprint(char *fmt, va_list args);
+int fmt·vfprint(int fd, char *fmt, va_list args);
+int fmt·vwrite(char *buf, char *fmt, va_list args);
+int fmt·vnwrite(int len, char *buf, char *fmt, va_list args);
+int fmt·vewrite(char *buf, char *end, char *fmt, va_list args);
+
+/* low-level interface: custom printing verbs */
+int fmt·do(fmt·State *, char *fmt);
+int fmt·put(fmt·State *, char *fmt, ...);
+int fmt·vput(fmt·State *, char *fmt, va_list args);
+int fmt·install(fmt·State *, int (*put)(fmt·State*));
+int fmt·flush(fmt·State *);