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