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fmtdef.h

/*
 * The authors of this software are Rob Pike and Ken Thompson.
 *              Copyright (c) 2002 by Lucent Technologies.
 * Permission to use, copy, modify, and distribute this software for any
 * purpose without fee is hereby granted, provided that this entire notice
 * is included in all copies of any software which is or includes a copy
 * or modification of this software and in all copies of the supporting
 * documentation for such software.
 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
 */

/*
 * 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 */
};

/* Edit .+1,/^$/ |cfn |grep -v static | grep __ */
double       __Inf(int sign);
double       __NaN(void);
int          __badfmt(Fmt *f);
int          __charfmt(Fmt *f);
int          __countfmt(Fmt *f);
int          __efgfmt(Fmt *fmt);
int          __errfmt(Fmt *f);
int          __flagfmt(Fmt *f);
int          __fmtFdFlush(Fmt *f);
int          __fmtcpy(Fmt *f, const void *vm, int n, int sz);
void*        __fmtdispatch(Fmt *f, void *fmt, int isrunes);
void *       __fmtflush(Fmt *f, void *t, int len);
void         __fmtlock(void);
int          __fmtpad(Fmt *f, int n);
double       __fmtpow10(int n);
int          __fmtrcpy(Fmt *f, const void *vm, int n);
void         __fmtunlock(void);
int          __ifmt(Fmt *f);
int          __isInf(double d, int sign);
int          __isNaN(double d);
int          __needsquotes(char *s, int *quotelenp);
int          __percentfmt(Fmt *f);
void         __quotesetup(char *s, Rune *r, int nin, int nout, Quoteinfo *q, int sharp, int runesout);
int          __quotestrfmt(int runesin, Fmt *f);
int          __rfmtpad(Fmt *f, int n);
int          __runefmt(Fmt *f);
int          __runeneedsquotes(Rune *r, int *quotelenp);
int          __runesfmt(Fmt *f);
int          __strfmt(Fmt *f);

#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)

#ifdef va_copy
#     define VA_COPY(a,b) va_copy(a,b)
#     define VA_END(a) va_end(a)
#else
#     define VA_COPY(a,b) (a) = (b)
#     define VA_END(a)
#endif


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