a

libc/fmtdef.h

@@ -0,0 +1,85 @@
+/*
+ * dofmt -- format to a buffer
+ * the number of characters formatted is returned,
+ * or -1 if there was an error.
+ * if the buffer is ever filled, flush is called.
+ * it should reset the buffer and return whether formatting should continue.
+ */
+
+typedef int (*Fmts)(Fmt*);
+
+typedef struct Quoteinfo Quoteinfo;
+struct Quoteinfo
+{
+	int	quoted;		/* if set, string must be quoted */
+	int	nrunesin;	/* number of input runes that can be accepted */
+	int	nbytesin;	/* number of input bytes that can be accepted */
+	int	nrunesout;	/* number of runes that will be generated */
+	int	nbytesout;	/* number of bytes that will be generated */
+};
+
+void	*_fmtflush(Fmt*, void*, int);
+void	*_fmtdispatch(Fmt*, void*, int);
+int	_floatfmt(Fmt*, double);
+int	_fmtpad(Fmt*, int);
+int	_rfmtpad(Fmt*, int);
+int	_fmtFdFlush(Fmt*);
+
+int	_efgfmt(Fmt*);
+int	_charfmt(Fmt*);
+int	_countfmt(Fmt*);
+int	_flagfmt(Fmt*);
+int	_percentfmt(Fmt*);
+int	_ifmt(Fmt*);
+int	_runefmt(Fmt*);
+int	_runesfmt(Fmt*);
+int	_strfmt(Fmt*);
+int	_badfmt(Fmt*);
+int	_fmtcpy(Fmt*, void*, int, int);
+int	_fmtrcpy(Fmt*, void*, int n);
+
+void	_fmtlock(void);
+void	_fmtunlock(void);
+
+#define FMTCHAR(f, t, s, c)\
+	do{\
+	if(t + 1 > (char*)s){\
+		t = _fmtflush(f, t, 1);\
+		if(t != nil)\
+			s = f->stop;\
+		else\
+			return -1;\
+	}\
+	*t++ = c;\
+	}while(0)
+
+#define FMTRCHAR(f, t, s, c)\
+	do{\
+	if(t + 1 > (Rune*)s){\
+		t = _fmtflush(f, t, sizeof(Rune));\
+		if(t != nil)\
+			s = f->stop;\
+		else\
+			return -1;\
+	}\
+	*t++ = c;\
+	}while(0)
+
+#define FMTRUNE(f, t, s, r)\
+	do{\
+	Rune _rune;\
+	int _runelen;\
+	if(t + UTFmax > (char*)s && t + (_runelen = runelen(r)) > (char*)s){\
+		t = _fmtflush(f, t, _runelen);\
+		if(t != nil)\
+			s = f->stop;\
+		else\
+			return -1;\
+	}\
+	if(r < Runeself)\
+		*t++ = r;\
+	else{\
+		_rune = r;\
+		t += runetochar(t, &_rune);\
+	}\
+	}while(0)