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	fmtdef.h - 9base - revived minimalist port of Plan 9 userland to Unix
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	fmtdef.h (2840B)
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	1 /* Copyright (c) 2002-2006 Lucent Technologies; see LICENSE */
	2
	3 /*
	4 * dofmt -- format to a buffer
	5 * the number of characters formatted is returned,
	6 * or -1 if there was an error.
	7 * if the buffer is ever filled, flush is called.
	8 * it should reset the buffer and return whether formatting should conti…
	9 */
	10
	11 typedef int (Fmts)(Fmt);
	12
	13 typedef struct Quoteinfo Quoteinfo;
	14 struct Quoteinfo
	15 {
	16 int quoted; /* if set, string must be quot…
	17 int nrunesin; /* number of input runes that can be…
	18 int nbytesin; /* number of input bytes that can be…
	19 int nrunesout; /* number of runes that will be gen…
	20 int nbytesout; /* number of bytes that will be gen…
	21 };
	22
	23 /* Edit .+1,/^$/ \|cfn \|grep -v static \| grep __ */
	24 double __Inf(int sign);
	25 double __NaN(void);
	26 int __badfmt(Fmt *f);
	27 int __charfmt(Fmt *f);
	28 int __countfmt(Fmt *f);
	29 int __efgfmt(Fmt *fmt);
	30 int __errfmt(Fmt *f);
	31 int __flagfmt(Fmt *f);
	32 int __fmtFdFlush(Fmt *f);
	33 int __fmtcpy(Fmt f, const void vm, int n, int sz);
	34 void* __fmtdispatch(Fmt f, void fmt, int isrunes);
	35 void * __fmtflush(Fmt f, void t, int len);
	36 void __fmtlock(void);
	37 int __fmtpad(Fmt *f, int n);
	38 double __fmtpow10(int n);
	39 int __fmtrcpy(Fmt f, const void vm, int n);
	40 void __fmtunlock(void);
	41 int __ifmt(Fmt *f);
	42 int __isInf(double d, int sign);
	43 int __isNaN(double d);
	44 int __needsep(int, char*);
	45 int __needsquotes(char s, int quotelenp);
	46 int __percentfmt(Fmt *f);
	47 void __quotesetup(char s, Rune r, int nin, int nout, Quoteinfo…
	48 int __quotestrfmt(int runesin, Fmt *f);
	49 int __rfmtpad(Fmt *f, int n);
	50 int __runefmt(Fmt *f);
	51 int __runeneedsquotes(Rune r, int quotelenp);
	52 int __runesfmt(Fmt *f);
	53 int __strfmt(Fmt *f);
	54
	55 #define FMTCHAR(f, t, s, c)\
	56 do{\
	57 if(t + 1 > (char*)s){\
	58 t = (char*)__fmtflush(f, t, 1);\
	59 if(t != nil)\
	60 s = (char*)f->stop;\
	61 else\
	62 return -1;\
	63 }\
	64 *t++ = c;\
	65 }while(0)
	66
	67 #define FMTRCHAR(f, t, s, c)\
	68 do{\
	69 if(t + 1 > (Rune*)s){\
	70 t = (Rune*)__fmtflush(f, t, sizeof(Rune));\
	71 if(t != nil)\
	72 s = (Rune*)f->stop;\
	73 else\
	74 return -1;\
	75 }\
	76 *t++ = c;\
	77 }while(0)
	78
	79 #define FMTRUNE(f, t, s, r)\
	80 do{\
	81 Rune _rune;\
	82 int _runelen;\
	83 if(t + UTFmax > (char)s && t + (_runelen = runelen(r)) > (char…
	84 t = (char*)__fmtflush(f, t, _runelen);\
	85 if(t != nil)\
	86 s = (char*)f->stop;\
	87 else\
	88 return -1;\
	89 }\
	90 if(r < Runeself)\
	91 *t++ = r;\
	92 else{\
	93 _rune = r;\
	94 t += runetochar(t, &_rune);\
	95 }\
	96 }while(0)
	97
	98 #ifdef va_copy
	99 # define VA_COPY(a,b) va_copy(a,b)
	100 # define VA_END(a) va_end(a)
	101 #else
	102 # define VA_COPY(a,b) (a) = (b)
	103 # define VA_END(a)
	104 #endif
	105