--- /dev/null
+// stb_sprintf - v1.02 - public domain snprintf() implementation
+// originally by Jeff Roberts / RAD Game Tools, 2015/10/20
+// http://github.com/nothings/stb
+//
+// allowed types: sc uidBboXx p AaGgEef n
+// lengths : h ll j z t I64 I32 I
+//
+// Contributors (bugfixes):
+// github:d26435
+// github:trex78
+
+#ifndef STB_SPRINTF_H_INCLUDE
+#define STB_SPRINTF_H_INCLUDE
+
+/*
+Single file sprintf replacement.
+
+Originally written by Jeff Roberts at RAD Game Tools - 2015/10/20.
+Hereby placed in public domain.
+
+This is a full sprintf replacement that supports everything that
+the C runtime sprintfs support, including float/double, 64-bit integers,
+hex floats, field parameters (%*.*d stuff), length reads backs, etc.
+
+Why would you need this if sprintf already exists? Well, first off,
+it's *much* faster (see below). It's also much smaller than the CRT
+versions code-space-wise. We've also added some simple improvements
+that are super handy (commas in thousands, callbacks at buffer full,
+for example). Finally, the format strings for MSVC and GCC differ
+for 64-bit integers (among other small things), so this lets you use
+the same format strings in cross platform code.
+
+It uses the standard single file trick of being both the header file
+and the source itself. If you just include it normally, you just get
+the header file function definitions. To get the code, you include
+it from a C or C++ file and define STB_SPRINTF_IMPLEMENTATION first.
+
+It only uses va_args macros from the C runtime to do it's work. It
+does cast doubles to S64s and shifts and divides U64s, which does
+drag in CRT code on most platforms.
+
+It compiles to roughly 8K with float support, and 4K without.
+As a comparison, when using MSVC static libs, calling sprintf drags
+in 16K.
+
+API:
+====
+int stbsp_sprintf( char * buf, char const * fmt, ... )
+int stbsp_snprintf( char * buf, int count, char const * fmt, ... )
+ Convert an arg list into a buffer. stbsp_snprintf always returns
+ a zero-terminated string (unlike regular snprintf).
+
+int stbsp_vsprintf( char * buf, char const * fmt, va_list va )
+int stbsp_vsnprintf( char * buf, int count, char const * fmt, va_list va )
+ Convert a va_list arg list into a buffer. stbsp_vsnprintf always returns
+ a zero-terminated string (unlike regular snprintf).
+
+int stbsp_vsprintfcb( STBSP_SPRINTFCB * callback, void * user, char * buf, char const * fmt, va_list va )
+ typedef char * STBSP_SPRINTFCB( char const * buf, void * user, int len );
+ Convert into a buffer, calling back every STB_SPRINTF_MIN chars.
+ Your callback can then copy the chars out, print them or whatever.
+ This function is actually the workhorse for everything else.
+ The buffer you pass in must hold at least STB_SPRINTF_MIN characters.
+ // you return the next buffer to use or 0 to stop converting
+
+void stbsp_set_separators( char comma, char period )
+ Set the comma and period characters to use.
+
+FLOATS/DOUBLES:
+===============
+This code uses a internal float->ascii conversion method that uses
+doubles with error correction (double-doubles, for ~105 bits of
+precision). This conversion is round-trip perfect - that is, an atof
+of the values output here will give you the bit-exact double back.
+
+One difference is that our insignificant digits will be different than
+with MSVC or GCC (but they don't match each other either). We also
+don't attempt to find the minimum length matching float (pre-MSVC15
+doesn't either).
+
+If you don't need float or doubles at all, define STB_SPRINTF_NOFLOAT
+and you'll save 4K of code space.
+
+64-BIT INTS:
+============
+This library also supports 64-bit integers and you can use MSVC style or
+GCC style indicators (%I64d or %lld). It supports the C99 specifiers
+for size_t and ptr_diff_t (%jd %zd) as well.
+
+EXTRAS:
+=======
+Like some GCCs, for integers and floats, you can use a ' (single quote)
+specifier and commas will be inserted on the thousands: "%'d" on 12345
+would print 12,345.
+
+For integers and floats, you can use a "$" specifier and the number
+will be converted to float and then divided to get kilo, mega, giga or
+tera and then printed, so "%$d" 1024 is "1.0 k", "%$.2d" 2536000 is
+"2.42 m", etc.
+
+In addition to octal and hexadecimal conversions, you can print
+integers in binary: "%b" for 256 would print 100.
+
+PERFORMANCE vs MSVC 2008 32-/64-bit (GCC is even slower than MSVC):
+===================================================================
+"%d" across all 32-bit ints (4.8x/4.0x faster than 32-/64-bit MSVC)
+"%24d" across all 32-bit ints (4.5x/4.2x faster)
+"%x" across all 32-bit ints (4.5x/3.8x faster)
+"%08x" across all 32-bit ints (4.3x/3.8x faster)
+"%f" across e-10 to e+10 floats (7.3x/6.0x faster)
+"%e" across e-10 to e+10 floats (8.1x/6.0x faster)
+"%g" across e-10 to e+10 floats (10.0x/7.1x faster)
+"%f" for values near e-300 (7.9x/6.5x faster)
+"%f" for values near e+300 (10.0x/9.1x faster)
+"%e" for values near e-300 (10.1x/7.0x faster)
+"%e" for values near e+300 (9.2x/6.0x faster)
+"%.320f" for values near e-300 (12.6x/11.2x faster)
+"%a" for random values (8.6x/4.3x faster)
+"%I64d" for 64-bits with 32-bit values (4.8x/3.4x faster)
+"%I64d" for 64-bits > 32-bit values (4.9x/5.5x faster)
+"%s%s%s" for 64 char strings (7.1x/7.3x faster)
+"...512 char string..." ( 35.0x/32.5x faster!)
+*/
+
+#if defined(__has_feature)
+ #if __has_feature(address_sanitizer)
+ #define STBI__ASAN __attribute__((no_sanitize("address")))
+ #endif
+#endif
+#ifndef STBI__ASAN
+#define STBI__ASAN
+#endif
+
+#ifdef STB_SPRINTF_STATIC
+#define STBSP__PUBLICDEC static
+#define STBSP__PUBLICDEF static STBI__ASAN
+#else
+#ifdef __cplusplus
+#define STBSP__PUBLICDEC extern "C"
+#define STBSP__PUBLICDEF extern "C" STBI__ASAN
+#else
+#define STBSP__PUBLICDEC extern
+#define STBSP__PUBLICDEF STBI__ASAN
+#endif
+#endif
+
+#include <stdarg.h> // for va_list()
+
+#ifndef STB_SPRINTF_MIN
+#define STB_SPRINTF_MIN 512 // how many characters per callback
+#endif
+typedef char * STBSP_SPRINTFCB( char * buf, void * user, int len );
+
+#ifndef STB_SPRINTF_DECORATE
+#define STB_SPRINTF_DECORATE(name) stbsp_##name // define this before including if you want to change the names
+#endif
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsprintf )( char * buf, char const * fmt, va_list va );
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsnprintf )( char * buf, int count, char const * fmt, va_list va );
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( sprintf ) ( char * buf, char const * fmt, ... );
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( snprintf )( char * buf, int count, char const * fmt, ... );
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsprintfcb )( STBSP_SPRINTFCB * callback, void * user, char * buf, char const * fmt, va_list va );
+STBSP__PUBLICDEF void STB_SPRINTF_DECORATE( set_separators )( char comma, char period );
+
+#endif // STB_SPRINTF_H_INCLUDE
+
+#ifdef STB_SPRINTF_IMPLEMENTATION
+
+#include <stdlib.h> // for va_arg()
+
+#define stbsp__uint32 unsigned int
+#define stbsp__int32 signed int
+
+#ifdef _MSC_VER
+#define stbsp__uint64 unsigned __int64
+#define stbsp__int64 signed __int64
+#else
+#define stbsp__uint64 unsigned long long
+#define stbsp__int64 signed long long
+#endif
+#define stbsp__uint16 unsigned short
+
+#ifndef stbsp__uintptr
+#if defined(__ppc64__) || defined(__aarch64__) || defined(_M_X64) || defined(__x86_64__) || defined(__x86_64)
+#define stbsp__uintptr stbsp__uint64
+#else
+#define stbsp__uintptr stbsp__uint32
+#endif
+#endif
+
+#ifndef STB_SPRINTF_MSVC_MODE // used for MSVC2013 and earlier (MSVC2015 matches GCC)
+#if defined(_MSC_VER) && (_MSC_VER<1900)
+#define STB_SPRINTF_MSVC_MODE
+#endif
+#endif
+
+#ifdef STB_SPRINTF_NOUNALIGNED // define this before inclusion to force stbsp_sprintf to always use aligned accesses
+#define STBSP__UNALIGNED(code)
+#else
+#define STBSP__UNALIGNED(code) code
+#endif
+
+#ifndef STB_SPRINTF_NOFLOAT
+// internal float utility functions
+static stbsp__int32 stbsp__real_to_str( char const * * start, stbsp__uint32 * len, char *out, stbsp__int32 * decimal_pos, double value, stbsp__uint32 frac_digits );
+static stbsp__int32 stbsp__real_to_parts( stbsp__int64 * bits, stbsp__int32 * expo, double value );
+#define STBSP__SPECIAL 0x7000
+#endif
+
+static char stbsp__period='.';
+static char stbsp__comma=',';
+static char stbsp__digitpair[201]="00010203040506070809101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899";
+
+STBSP__PUBLICDEF void STB_SPRINTF_DECORATE( set_separators )( char pcomma, char pperiod )
+{
+ stbsp__period=pperiod;
+ stbsp__comma=pcomma;
+}
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsprintfcb )( STBSP_SPRINTFCB * callback, void * user, char * buf, char const * fmt, va_list va )
+{
+ static char hex[]="0123456789abcdefxp";
+ static char hexu[]="0123456789ABCDEFXP";
+ char * bf;
+ char const * f;
+ int tlen = 0;
+
+ bf = buf;
+ f = fmt;
+ for(;;)
+ {
+ stbsp__int32 fw,pr,tz; stbsp__uint32 fl;
+
+ #define STBSP__LEFTJUST 1
+ #define STBSP__LEADINGPLUS 2
+ #define STBSP__LEADINGSPACE 4
+ #define STBSP__LEADING_0X 8
+ #define STBSP__LEADINGZERO 16
+ #define STBSP__INTMAX 32
+ #define STBSP__TRIPLET_COMMA 64
+ #define STBSP__NEGATIVE 128
+ #define STBSP__METRIC_SUFFIX 256
+ #define STBSP__HALFWIDTH 512
+
+ // macros for the callback buffer stuff
+ #define stbsp__chk_cb_bufL(bytes) { int len = (int)(bf-buf); if ((len+(bytes))>=STB_SPRINTF_MIN) { tlen+=len; if (0==(bf=buf=callback(buf,user,len))) goto done; } }
+ #define stbsp__chk_cb_buf(bytes) { if ( callback ) { stbsp__chk_cb_bufL(bytes); } }
+ #define stbsp__flush_cb() { stbsp__chk_cb_bufL(STB_SPRINTF_MIN-1); } //flush if there is even one byte in the buffer
+ #define stbsp__cb_buf_clamp(cl,v) cl = v; if ( callback ) { int lg = STB_SPRINTF_MIN-(int)(bf-buf); if (cl>lg) cl=lg; }
+
+ // fast copy everything up to the next % (or end of string)
+ for(;;)
+ {
+ while (((stbsp__uintptr)f)&3)
+ {
+ schk1: if (f[0]=='%') goto scandd;
+ schk2: if (f[0]==0) goto endfmt;
+ stbsp__chk_cb_buf(1); *bf++=f[0]; ++f;
+ }
+ for(;;)
+ {
+ // Check if the next 4 bytes contain %(0x25) or end of string.
+ // Using the 'hasless' trick:
+ // https://graphics.stanford.edu/~seander/bithacks.html#HasLessInWord
+ stbsp__uint32 v,c;
+ v=*(stbsp__uint32*)f; c=(~v)&0x80808080;
+ if (((v^0x25252525)-0x01010101)&c) goto schk1;
+ if ((v-0x01010101)&c) goto schk2;
+ if (callback) if ((STB_SPRINTF_MIN-(int)(bf-buf))<4) goto schk1;
+ *(stbsp__uint32*)bf=v; bf+=4; f+=4;
+ }
+ } scandd:
+
+ ++f;
+
+ // ok, we have a percent, read the modifiers first
+ fw = 0; pr = -1; fl = 0; tz = 0;
+
+ // flags
+ for(;;)
+ {
+ switch(f[0])
+ {
+ // if we have left justify
+ case '-': fl|=STBSP__LEFTJUST; ++f; continue;
+ // if we have leading plus
+ case '+': fl|=STBSP__LEADINGPLUS; ++f; continue;
+ // if we have leading space
+ case ' ': fl|=STBSP__LEADINGSPACE; ++f; continue;
+ // if we have leading 0x
+ case '#': fl|=STBSP__LEADING_0X; ++f; continue;
+ // if we have thousand commas
+ case '\'': fl|=STBSP__TRIPLET_COMMA; ++f; continue;
+ // if we have kilo marker
+ case '$': fl|=STBSP__METRIC_SUFFIX; ++f; continue;
+ // if we have leading zero
+ case '0': fl|=STBSP__LEADINGZERO; ++f; goto flags_done;
+ default: goto flags_done;
+ }
+ }
+ flags_done:
+
+ // get the field width
+ if ( f[0] == '*' ) {fw = va_arg(va,stbsp__uint32); ++f;} else { while (( f[0] >= '0' ) && ( f[0] <= '9' )) { fw = fw * 10 + f[0] - '0'; f++; } }
+ // get the precision
+ if ( f[0]=='.' ) { ++f; if ( f[0] == '*' ) {pr = va_arg(va,stbsp__uint32); ++f;} else { pr = 0; while (( f[0] >= '0' ) && ( f[0] <= '9' )) { pr = pr * 10 + f[0] - '0'; f++; } } }
+
+ // handle integer size overrides
+ switch(f[0])
+ {
+ // are we halfwidth?
+ case 'h': fl|=STBSP__HALFWIDTH; ++f; break;
+ // are we 64-bit (unix style)
+ case 'l': ++f; if ( f[0]=='l') { fl|=STBSP__INTMAX; ++f; } break;
+ // are we 64-bit on intmax? (c99)
+ case 'j': fl|=STBSP__INTMAX; ++f; break;
+ // are we 64-bit on size_t or ptrdiff_t? (c99)
+ case 'z': case 't': fl|=((sizeof(char*)==8)?STBSP__INTMAX:0); ++f; break;
+ // are we 64-bit (msft style)
+ case 'I': if ( ( f[1]=='6') && ( f[2]=='4') ) { fl|=STBSP__INTMAX; f+=3; }
+ else if ( ( f[1]=='3') && ( f[2]=='2') ) { f+=3; }
+ else { fl|=((sizeof(void*)==8)?STBSP__INTMAX:0); ++f; } break;
+ default: break;
+ }
+
+ // handle each replacement
+ switch( f[0] )
+ {
+ #define STBSP__NUMSZ 512 // big enough for e308 (with commas) or e-307
+ char num[STBSP__NUMSZ];
+ char lead[8];
+ char tail[8];
+ char *s;
+ char const *h;
+ stbsp__uint32 l,n,cs;
+ stbsp__uint64 n64;
+ #ifndef STB_SPRINTF_NOFLOAT
+ double fv;
+ #endif
+ stbsp__int32 dp; char const * sn;
+
+ case 's':
+ // get the string
+ s = va_arg(va,char*); if (s==0) s = (char*)"null";
+ // get the length
+ sn = s;
+ for(;;)
+ {
+ if ((((stbsp__uintptr)sn)&3)==0) break;
+ lchk:
+ if (sn[0]==0) goto ld;
+ ++sn;
+ }
+ n = 0xffffffff;
+ if (pr>=0) { n=(stbsp__uint32)(sn-s); if (n>=(stbsp__uint32)pr) goto ld; n=((stbsp__uint32)(pr-n))>>2; }
+ while(n)
+ {
+ stbsp__uint32 v=*(stbsp__uint32*)sn;
+ if ((v-0x01010101)&(~v)&0x80808080UL) goto lchk;
+ sn+=4;
+ --n;
+ }
+ goto lchk;
+ ld:
+
+ l = (stbsp__uint32) ( sn - s );
+ // clamp to precision
+ if ( l > (stbsp__uint32)pr ) l = pr;
+ lead[0]=0; tail[0]=0; pr = 0; dp = 0; cs = 0;
+ // copy the string in
+ goto scopy;
+
+ case 'c': // char
+ // get the character
+ s = num + STBSP__NUMSZ -1; *s = (char)va_arg(va,int);
+ l = 1;
+ lead[0]=0; tail[0]=0; pr = 0; dp = 0; cs = 0;
+ goto scopy;
+
+ case 'n': // weird write-bytes specifier
+ { int * d = va_arg(va,int*);
+ *d = tlen + (int)( bf - buf ); }
+ break;
+
+#ifdef STB_SPRINTF_NOFLOAT
+ case 'A': // float
+ case 'a': // hex float
+ case 'G': // float
+ case 'g': // float
+ case 'E': // float
+ case 'e': // float
+ case 'f': // float
+ va_arg(va,double); // eat it
+ s = (char*)"No float";
+ l = 8;
+ lead[0]=0; tail[0]=0; pr = 0; dp = 0; cs = 0;
+ goto scopy;
+#else
+ case 'A': // float
+ h=hexu;
+ goto hexfloat;
+
+ case 'a': // hex float
+ h=hex;
+ hexfloat:
+ fv = va_arg(va,double);
+ if (pr==-1) pr=6; // default is 6
+ // read the double into a string
+ if ( stbsp__real_to_parts( (stbsp__int64*)&n64, &dp, fv ) )
+ fl |= STBSP__NEGATIVE;
+
+ s = num+64;
+
+ // sign
+ lead[0]=0; if (fl&STBSP__NEGATIVE) { lead[0]=1; lead[1]='-'; } else if (fl&STBSP__LEADINGSPACE) { lead[0]=1; lead[1]=' '; } else if (fl&STBSP__LEADINGPLUS) { lead[0]=1; lead[1]='+'; };
+
+ if (dp==-1023) dp=(n64)?-1022:0; else n64|=(((stbsp__uint64)1)<<52);
+ n64<<=(64-56);
+ if (pr<15) n64+=((((stbsp__uint64)8)<<56)>>(pr*4));
+ // add leading chars
+
+ #ifdef STB_SPRINTF_MSVC_MODE
+ *s++='0';*s++='x';
+ #else
+ lead[1+lead[0]]='0'; lead[2+lead[0]]='x'; lead[0]+=2;
+ #endif
+ *s++=h[(n64>>60)&15]; n64<<=4;
+ if ( pr ) *s++=stbsp__period;
+ sn = s;
+
+ // print the bits
+ n = pr; if (n>13) n = 13; if (pr>(stbsp__int32)n) tz=pr-n; pr = 0;
+ while(n--) { *s++=h[(n64>>60)&15]; n64<<=4; }
+
+ // print the expo
+ tail[1]=h[17];
+ if (dp<0) { tail[2]='-'; dp=-dp;} else tail[2]='+';
+ n = (dp>=1000)?6:((dp>=100)?5:((dp>=10)?4:3));
+ tail[0]=(char)n;
+ for(;;) { tail[n]='0'+dp%10; if (n<=3) break; --n; dp/=10; }
+
+ dp = (int)(s-sn);
+ l = (int)(s-(num+64));
+ s = num+64;
+ cs = 1 + (3<<24);
+ goto scopy;
+
+ case 'G': // float
+ h=hexu;
+ goto dosmallfloat;
+
+ case 'g': // float
+ h=hex;
+ dosmallfloat:
+ fv = va_arg(va,double);
+ if (pr==-1) pr=6; else if (pr==0) pr = 1; // default is 6
+ // read the double into a string
+ if ( stbsp__real_to_str( &sn, &l, num, &dp, fv, (pr-1)|0x80000000 ) )
+ fl |= STBSP__NEGATIVE;
+
+ // clamp the precision and delete extra zeros after clamp
+ n = pr;
+ if ( l > (stbsp__uint32)pr ) l = pr; while ((l>1)&&(pr)&&(sn[l-1]=='0')) { --pr; --l; }
+
+ // should we use %e
+ if ((dp<=-4)||(dp>(stbsp__int32)n))
+ {
+ if ( pr > (stbsp__int32)l ) pr = l-1; else if ( pr ) --pr; // when using %e, there is one digit before the decimal
+ goto doexpfromg;
+ }
+ // this is the insane action to get the pr to match %g sematics for %f
+ if(dp>0) { pr=(dp<(stbsp__int32)l)?l-dp:0; } else { pr = -dp+((pr>(stbsp__int32)l)?l:pr); }
+ goto dofloatfromg;
+
+ case 'E': // float
+ h=hexu;
+ goto doexp;
+
+ case 'e': // float
+ h=hex;
+ doexp:
+ fv = va_arg(va,double);
+ if (pr==-1) pr=6; // default is 6
+ // read the double into a string
+ if ( stbsp__real_to_str( &sn, &l, num, &dp, fv, pr|0x80000000 ) )
+ fl |= STBSP__NEGATIVE;
+ doexpfromg:
+ tail[0]=0;
+ lead[0]=0; if (fl&STBSP__NEGATIVE) { lead[0]=1; lead[1]='-'; } else if (fl&STBSP__LEADINGSPACE) { lead[0]=1; lead[1]=' '; } else if (fl&STBSP__LEADINGPLUS) { lead[0]=1; lead[1]='+'; };
+ if ( dp == STBSP__SPECIAL ) { s=(char*)sn; cs=0; pr=0; goto scopy; }
+ s=num+64;
+ // handle leading chars
+ *s++=sn[0];
+
+ if (pr) *s++=stbsp__period;
+
+ // handle after decimal
+ if ((l-1)>(stbsp__uint32)pr) l=pr+1;
+ for(n=1;n<l;n++) *s++=sn[n];
+ // trailing zeros
+ tz = pr-(l-1); pr=0;
+ // dump expo
+ tail[1]=h[0xe];
+ dp -= 1;
+ if (dp<0) { tail[2]='-'; dp=-dp;} else tail[2]='+';
+ #ifdef STB_SPRINTF_MSVC_MODE
+ n = 5;
+ #else
+ n = (dp>=100)?5:4;
+ #endif
+ tail[0]=(char)n;
+ for(;;) { tail[n]='0'+dp%10; if (n<=3) break; --n; dp/=10; }
+ cs = 1 + (3<<24); // how many tens
+ goto flt_lead;
+
+ case 'f': // float
+ fv = va_arg(va,double);
+ doafloat:
+ // do kilos
+ if (fl&STBSP__METRIC_SUFFIX) {while(fl<0x4000000) { if ((fv<1024.0) && (fv>-1024.0)) break; fv/=1024.0; fl+=0x1000000; }}
+ if (pr==-1) pr=6; // default is 6
+ // read the double into a string
+ if ( stbsp__real_to_str( &sn, &l, num, &dp, fv, pr ) )
+ fl |= STBSP__NEGATIVE;
+ dofloatfromg:
+ tail[0]=0;
+ // sign
+ lead[0]=0; if (fl&STBSP__NEGATIVE) { lead[0]=1; lead[1]='-'; } else if (fl&STBSP__LEADINGSPACE) { lead[0]=1; lead[1]=' '; } else if (fl&STBSP__LEADINGPLUS) { lead[0]=1; lead[1]='+'; };
+ if ( dp == STBSP__SPECIAL ) { s=(char*)sn; cs=0; pr=0; goto scopy; }
+ s=num+64;
+
+ // handle the three decimal varieties
+ if (dp<=0)
+ {
+ stbsp__int32 i;
+ // handle 0.000*000xxxx
+ *s++='0'; if (pr) *s++=stbsp__period;
+ n=-dp; if((stbsp__int32)n>pr) n=pr; i=n; while(i) { if ((((stbsp__uintptr)s)&3)==0) break; *s++='0'; --i; } while(i>=4) { *(stbsp__uint32*)s=0x30303030; s+=4; i-=4; } while(i) { *s++='0'; --i; }
+ if ((stbsp__int32)(l+n)>pr) l=pr-n; i=l; while(i) { *s++=*sn++; --i; }
+ tz = pr-(n+l);
+ cs = 1 + (3<<24); // how many tens did we write (for commas below)
+ }
+ else
+ {
+ cs = (fl&STBSP__TRIPLET_COMMA)?((600-(stbsp__uint32)dp)%3):0;
+ if ((stbsp__uint32)dp>=l)
+ {
+ // handle xxxx000*000.0
+ n=0; for(;;) { if ((fl&STBSP__TRIPLET_COMMA) && (++cs==4)) { cs = 0; *s++=stbsp__comma; } else { *s++=sn[n]; ++n; if (n>=l) break; } }
+ if (n<(stbsp__uint32)dp)
+ {
+ n = dp - n;
+ if ((fl&STBSP__TRIPLET_COMMA)==0) { while(n) { if ((((stbsp__uintptr)s)&3)==0) break; *s++='0'; --n; } while(n>=4) { *(stbsp__uint32*)s=0x30303030; s+=4; n-=4; } }
+ while(n) { if ((fl&STBSP__TRIPLET_COMMA) && (++cs==4)) { cs = 0; *s++=stbsp__comma; } else { *s++='0'; --n; } }
+ }
+ cs = (int)(s-(num+64)) + (3<<24); // cs is how many tens
+ if (pr) { *s++=stbsp__period; tz=pr;}
+ }
+ else
+ {
+ // handle xxxxx.xxxx000*000
+ n=0; for(;;) { if ((fl&STBSP__TRIPLET_COMMA) && (++cs==4)) { cs = 0; *s++=stbsp__comma; } else { *s++=sn[n]; ++n; if (n>=(stbsp__uint32)dp) break; } }
+ cs = (int)(s-(num+64)) + (3<<24); // cs is how many tens
+ if (pr) *s++=stbsp__period;
+ if ((l-dp)>(stbsp__uint32)pr) l=pr+dp;
+ while(n<l) { *s++=sn[n]; ++n; }
+ tz = pr-(l-dp);
+ }
+ }
+ pr = 0;
+
+ // handle k,m,g,t
+ if (fl&STBSP__METRIC_SUFFIX) { tail[0]=1; tail[1]=' '; { if (fl>>24) { tail[2]="_kmgt"[fl>>24]; tail[0]=2; } } };
+
+ flt_lead:
+ // get the length that we copied
+ l = (stbsp__uint32) ( s-(num+64) );
+ s=num+64;
+ goto scopy;
+#endif
+
+ case 'B': // upper binary
+ h = hexu;
+ goto binary;
+
+ case 'b': // lower binary
+ h = hex;
+ binary:
+ lead[0]=0;
+ if (fl&STBSP__LEADING_0X) { lead[0]=2;lead[1]='0';lead[2]=h[0xb]; }
+ l=(8<<4)|(1<<8);
+ goto radixnum;
+
+ case 'o': // octal
+ h = hexu;
+ lead[0]=0;
+ if (fl&STBSP__LEADING_0X) { lead[0]=1;lead[1]='0'; }
+ l=(3<<4)|(3<<8);
+ goto radixnum;
+
+ case 'p': // pointer
+ fl |= (sizeof(void*)==8)?STBSP__INTMAX:0;
+ pr = sizeof(void*)*2;
+ fl &= ~STBSP__LEADINGZERO; // 'p' only prints the pointer with zeros
+ // drop through to X
+
+ case 'X': // upper binary
+ h = hexu;
+ goto dohexb;
+
+ case 'x': // lower binary
+ h = hex; dohexb:
+ l=(4<<4)|(4<<8);
+ lead[0]=0;
+ if (fl&STBSP__LEADING_0X) { lead[0]=2;lead[1]='0';lead[2]=h[16]; }
+ radixnum:
+ // get the number
+ if ( fl&STBSP__INTMAX )
+ n64 = va_arg(va,stbsp__uint64);
+ else
+ n64 = va_arg(va,stbsp__uint32);
+
+ s = num + STBSP__NUMSZ; dp = 0;
+ // clear tail, and clear leading if value is zero
+ tail[0]=0; if (n64==0) { lead[0]=0; if (pr==0) { l=0; cs = ( ((l>>4)&15)) << 24; goto scopy; } }
+ // convert to string
+ for(;;) { *--s = h[n64&((1<<(l>>8))-1)]; n64>>=(l>>8); if ( ! ( (n64) || ((stbsp__int32) ( (num+STBSP__NUMSZ) - s ) < pr ) ) ) break; if ( fl&STBSP__TRIPLET_COMMA) { ++l; if ((l&15)==((l>>4)&15)) { l&=~15; *--s=stbsp__comma; } } };
+ // get the tens and the comma pos
+ cs = (stbsp__uint32) ( (num+STBSP__NUMSZ) - s ) + ( ( ((l>>4)&15)) << 24 );
+ // get the length that we copied
+ l = (stbsp__uint32) ( (num+STBSP__NUMSZ) - s );
+ // copy it
+ goto scopy;
+
+ case 'u': // unsigned
+ case 'i':
+ case 'd': // integer
+ // get the integer and abs it
+ if ( fl&STBSP__INTMAX )
+ {
+ stbsp__int64 i64 = va_arg(va,stbsp__int64); n64 = (stbsp__uint64)i64; if ((f[0]!='u') && (i64<0)) { n64=(stbsp__uint64)-i64; fl|=STBSP__NEGATIVE; }
+ }
+ else
+ {
+ stbsp__int32 i = va_arg(va,stbsp__int32); n64 = (stbsp__uint32)i; if ((f[0]!='u') && (i<0)) { n64=(stbsp__uint32)-i; fl|=STBSP__NEGATIVE; }
+ }
+
+ #ifndef STB_SPRINTF_NOFLOAT
+ if (fl&STBSP__METRIC_SUFFIX) { if (n64<1024) pr=0; else if (pr==-1) pr=1; fv=(double)(stbsp__int64)n64; goto doafloat; }
+ #endif
+
+ // convert to string
+ s = num+STBSP__NUMSZ; l=0;
+
+ for(;;)
+ {
+ // do in 32-bit chunks (avoid lots of 64-bit divides even with constant denominators)
+ char * o=s-8;
+ if (n64>=100000000) { n = (stbsp__uint32)( n64 % 100000000); n64 /= 100000000; } else {n = (stbsp__uint32)n64; n64 = 0; }
+ if((fl&STBSP__TRIPLET_COMMA)==0) { while(n) { s-=2; *(stbsp__uint16*)s=*(stbsp__uint16*)&stbsp__digitpair[(n%100)*2]; n/=100; } }
+ while (n) { if ( ( fl&STBSP__TRIPLET_COMMA) && (l++==3) ) { l=0; *--s=stbsp__comma; --o; } else { *--s=(char)(n%10)+'0'; n/=10; } }
+ if (n64==0) { if ((s[0]=='0') && (s!=(num+STBSP__NUMSZ))) ++s; break; }
+ while (s!=o) if ( ( fl&STBSP__TRIPLET_COMMA) && (l++==3) ) { l=0; *--s=stbsp__comma; --o; } else { *--s='0'; }
+ }
+
+ tail[0]=0;
+ // sign
+ lead[0]=0; if (fl&STBSP__NEGATIVE) { lead[0]=1; lead[1]='-'; } else if (fl&STBSP__LEADINGSPACE) { lead[0]=1; lead[1]=' '; } else if (fl&STBSP__LEADINGPLUS) { lead[0]=1; lead[1]='+'; };
+
+ // get the length that we copied
+ l = (stbsp__uint32) ( (num+STBSP__NUMSZ) - s ); if ( l == 0 ) { *--s='0'; l = 1; }
+ cs = l + (3<<24);
+ if (pr<0) pr = 0;
+
+ scopy:
+ // get fw=leading/trailing space, pr=leading zeros
+ if (pr<(stbsp__int32)l) pr = l;
+ n = pr + lead[0] + tail[0] + tz;
+ if (fw<(stbsp__int32)n) fw = n;
+ fw -= n;
+ pr -= l;
+
+ // handle right justify and leading zeros
+ if ( (fl&STBSP__LEFTJUST)==0 )
+ {
+ if (fl&STBSP__LEADINGZERO) // if leading zeros, everything is in pr
+ {
+ pr = (fw>pr)?fw:pr;
+ fw = 0;
+ }
+ else
+ {
+ fl &= ~STBSP__TRIPLET_COMMA; // if no leading zeros, then no commas
+ }
+ }
+
+ // copy the spaces and/or zeros
+ if (fw+pr)
+ {
+ stbsp__int32 i; stbsp__uint32 c;
+
+ // copy leading spaces (or when doing %8.4d stuff)
+ if ( (fl&STBSP__LEFTJUST)==0 ) while(fw>0) { stbsp__cb_buf_clamp(i,fw); fw -= i; while(i) { if ((((stbsp__uintptr)bf)&3)==0) break; *bf++=' '; --i; } while(i>=4) { *(stbsp__uint32*)bf=0x20202020; bf+=4; i-=4; } while (i) {*bf++=' '; --i;} stbsp__chk_cb_buf(1); }
+
+ // copy leader
+ sn=lead+1; while(lead[0]) { stbsp__cb_buf_clamp(i,lead[0]); lead[0] -= (char)i; while (i) {*bf++=*sn++; --i;} stbsp__chk_cb_buf(1); }
+
+ // copy leading zeros
+ c = cs >> 24; cs &= 0xffffff;
+ cs = (fl&STBSP__TRIPLET_COMMA)?((stbsp__uint32)(c-((pr+cs)%(c+1)))):0;
+ while(pr>0) { stbsp__cb_buf_clamp(i,pr); pr -= i; if((fl&STBSP__TRIPLET_COMMA)==0) { while(i) { if ((((stbsp__uintptr)bf)&3)==0) break; *bf++='0'; --i; } while(i>=4) { *(stbsp__uint32*)bf=0x30303030; bf+=4; i-=4; } } while (i) { if((fl&STBSP__TRIPLET_COMMA) && (cs++==c)) { cs = 0; *bf++=stbsp__comma; } else *bf++='0'; --i; } stbsp__chk_cb_buf(1); }
+ }
+
+ // copy leader if there is still one
+ sn=lead+1; while(lead[0]) { stbsp__int32 i; stbsp__cb_buf_clamp(i,lead[0]); lead[0] -= (char)i; while (i) {*bf++=*sn++; --i;} stbsp__chk_cb_buf(1); }
+
+ // copy the string
+ n = l; while (n) { stbsp__int32 i; stbsp__cb_buf_clamp(i,n); n-=i; STBSP__UNALIGNED( while(i>=4) { *(stbsp__uint32*)bf=*(stbsp__uint32*)s; bf+=4; s+=4; i-=4; } ) while (i) {*bf++=*s++; --i;} stbsp__chk_cb_buf(1); }
+
+ // copy trailing zeros
+ while(tz) { stbsp__int32 i; stbsp__cb_buf_clamp(i,tz); tz -= i; while(i) { if ((((stbsp__uintptr)bf)&3)==0) break; *bf++='0'; --i; } while(i>=4) { *(stbsp__uint32*)bf=0x30303030; bf+=4; i-=4; } while (i) {*bf++='0'; --i;} stbsp__chk_cb_buf(1); }
+
+ // copy tail if there is one
+ sn=tail+1; while(tail[0]) { stbsp__int32 i; stbsp__cb_buf_clamp(i,tail[0]); tail[0] -= (char)i; while (i) {*bf++=*sn++; --i;} stbsp__chk_cb_buf(1); }
+
+ // handle the left justify
+ if (fl&STBSP__LEFTJUST) if (fw>0) { while (fw) { stbsp__int32 i; stbsp__cb_buf_clamp(i,fw); fw-=i; while(i) { if ((((stbsp__uintptr)bf)&3)==0) break; *bf++=' '; --i; } while(i>=4) { *(stbsp__uint32*)bf=0x20202020; bf+=4; i-=4; } while (i--) *bf++=' '; stbsp__chk_cb_buf(1); } }
+ break;
+
+ default: // unknown, just copy code
+ s = num + STBSP__NUMSZ -1; *s = f[0];
+ l = 1;
+ fw=pr=fl=0;
+ lead[0]=0; tail[0]=0; pr = 0; dp = 0; cs = 0;
+ goto scopy;
+ }
+ ++f;
+ }
+ endfmt:
+
+ if (!callback)
+ *bf = 0;
+ else
+ stbsp__flush_cb();
+
+ done:
+ return tlen + (int)(bf-buf);
+}
+
+// cleanup
+#undef STBSP__LEFTJUST
+#undef STBSP__LEADINGPLUS
+#undef STBSP__LEADINGSPACE
+#undef STBSP__LEADING_0X
+#undef STBSP__LEADINGZERO
+#undef STBSP__INTMAX
+#undef STBSP__TRIPLET_COMMA
+#undef STBSP__NEGATIVE
+#undef STBSP__METRIC_SUFFIX
+#undef STBSP__NUMSZ
+#undef stbsp__chk_cb_bufL
+#undef stbsp__chk_cb_buf
+#undef stbsp__flush_cb
+#undef stbsp__cb_buf_clamp
+
+// ============================================================================
+// wrapper functions
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( sprintf )( char * buf, char const * fmt, ... )
+{
+ int result;
+ va_list va;
+ va_start( va, fmt );
+ result = STB_SPRINTF_DECORATE( vsprintfcb )( 0, 0, buf, fmt, va );
+ va_end(va);
+ return result;
+}
+
+typedef struct stbsp__context
+{
+ char * buf;
+ int count;
+ char tmp[ STB_SPRINTF_MIN ];
+} stbsp__context;
+
+static char * stbsp__clamp_callback( char * buf, void * user, int len )
+{
+ stbsp__context * c = (stbsp__context*)user;
+
+ if ( len > c->count ) len = c->count;
+
+ if (len)
+ {
+ if ( buf != c->buf )
+ {
+ char * s, * d, * se;
+ d = c->buf; s = buf; se = buf+len;
+ do{ *d++ = *s++; } while (s<se);
+ }
+ c->buf += len;
+ c->count -= len;
+ }
+
+ if ( c->count <= 0 ) return 0;
+ return ( c->count >= STB_SPRINTF_MIN ) ? c->buf : c->tmp; // go direct into buffer if you can
+}
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsnprintf )( char * buf, int count, char const * fmt, va_list va )
+{
+ stbsp__context c;
+ int l;
+
+ if ( count == 0 )
+ return 0;
+
+ c.buf = buf;
+ c.count = count;
+
+ STB_SPRINTF_DECORATE( vsprintfcb )( stbsp__clamp_callback, &c, stbsp__clamp_callback(0,&c,0), fmt, va );
+
+ // zero-terminate
+ l = (int)( c.buf - buf );
+ if ( l >= count ) // should never be greater, only equal (or less) than count
+ l = count - 1;
+ buf[l] = 0;
+
+ return l;
+}
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( snprintf )( char * buf, int count, char const * fmt, ... )
+{
+ int result;
+ va_list va;
+ va_start( va, fmt );
+
+ result = STB_SPRINTF_DECORATE( vsnprintf )( buf, count, fmt, va );
+ va_end(va);
+
+ return result;
+}
+
+STBSP__PUBLICDEF int STB_SPRINTF_DECORATE( vsprintf )( char * buf, char const * fmt, va_list va )
+{
+ return STB_SPRINTF_DECORATE( vsprintfcb )( 0, 0, buf, fmt, va );
+}
+
+// =======================================================================
+// low level float utility functions
+
+#ifndef STB_SPRINTF_NOFLOAT
+
+// copies d to bits w/ strict aliasing (this compiles to nothing on /Ox)
+#define STBSP__COPYFP(dest,src) { int cn; for(cn=0;cn<8;cn++) ((char*)&dest)[cn]=((char*)&src)[cn]; }
+
+// get float info
+static stbsp__int32 stbsp__real_to_parts( stbsp__int64 * bits, stbsp__int32 * expo, double value )
+{
+ double d;
+ stbsp__int64 b = 0;
+
+ // load value and round at the frac_digits
+ d = value;
+
+ STBSP__COPYFP( b, d );
+
+ *bits = b & ((((stbsp__uint64)1)<<52)-1);
+ *expo = (stbsp__int32) (((b >> 52) & 2047)-1023);
+
+ return (stbsp__int32)(b >> 63);
+}
+
+static double const stbsp__bot[23]={1e+000,1e+001,1e+002,1e+003,1e+004,1e+005,1e+006,1e+007,1e+008,1e+009,1e+010,1e+011,1e+012,1e+013,1e+014,1e+015,1e+016,1e+017,1e+018,1e+019,1e+020,1e+021,1e+022};
+static double const stbsp__negbot[22]={1e-001,1e-002,1e-003,1e-004,1e-005,1e-006,1e-007,1e-008,1e-009,1e-010,1e-011,1e-012,1e-013,1e-014,1e-015,1e-016,1e-017,1e-018,1e-019,1e-020,1e-021,1e-022};
+static double const stbsp__negboterr[22]={-5.551115123125783e-018,-2.0816681711721684e-019,-2.0816681711721686e-020,-4.7921736023859299e-021,-8.1803053914031305e-022,4.5251888174113741e-023,4.5251888174113739e-024,-2.0922560830128471e-025,-6.2281591457779853e-026,-3.6432197315497743e-027,6.0503030718060191e-028,2.0113352370744385e-029,-3.0373745563400371e-030,1.1806906454401013e-032,-7.7705399876661076e-032,2.0902213275965398e-033,-7.1542424054621921e-034,-7.1542424054621926e-035,2.4754073164739869e-036,5.4846728545790429e-037,9.2462547772103625e-038,-4.8596774326570872e-039};
+static double const stbsp__top[13]={1e+023,1e+046,1e+069,1e+092,1e+115,1e+138,1e+161,1e+184,1e+207,1e+230,1e+253,1e+276,1e+299};
+static double const stbsp__negtop[13]={1e-023,1e-046,1e-069,1e-092,1e-115,1e-138,1e-161,1e-184,1e-207,1e-230,1e-253,1e-276,1e-299};
+static double const stbsp__toperr[13]={8388608,6.8601809640529717e+028,-7.253143638152921e+052,-4.3377296974619174e+075,-1.5559416129466825e+098,-3.2841562489204913e+121,-3.7745893248228135e+144,-1.7356668416969134e+167,-3.8893577551088374e+190,-9.9566444326005119e+213,6.3641293062232429e+236,-5.2069140800249813e+259,-5.2504760255204387e+282};
+static double const stbsp__negtoperr[13]={3.9565301985100693e-040,-2.299904345391321e-063,3.6506201437945798e-086,1.1875228833981544e-109,-5.0644902316928607e-132,-6.7156837247865426e-155,-2.812077463003139e-178,-5.7778912386589953e-201,7.4997100559334532e-224,-4.6439668915134491e-247,-6.3691100762962136e-270,-9.436808465446358e-293,8.0970921678014997e-317};
+
+#if defined(_MSC_VER) && (_MSC_VER<=1200)
+static stbsp__uint64 const stbsp__powten[20]={1,10,100,1000, 10000,100000,1000000,10000000, 100000000,1000000000,10000000000,100000000000, 1000000000000,10000000000000,100000000000000,1000000000000000, 10000000000000000,100000000000000000,1000000000000000000,10000000000000000000U };
+#define stbsp__tento19th ((stbsp__uint64)1000000000000000000)
+#else
+static stbsp__uint64 const stbsp__powten[20]={1,10,100,1000, 10000,100000,1000000,10000000, 100000000,1000000000,10000000000ULL,100000000000ULL, 1000000000000ULL,10000000000000ULL,100000000000000ULL,1000000000000000ULL, 10000000000000000ULL,100000000000000000ULL,1000000000000000000ULL,10000000000000000000ULL };
+#define stbsp__tento19th (1000000000000000000ULL)
+#endif
+
+#define stbsp__ddmulthi(oh,ol,xh,yh) \
+{ \
+ double ahi=0,alo,bhi=0,blo; \
+ stbsp__int64 bt; \
+ oh = xh * yh; \
+ STBSP__COPYFP(bt,xh); bt&=((~(stbsp__uint64)0)<<27); STBSP__COPYFP(ahi,bt); alo = xh-ahi; \
+ STBSP__COPYFP(bt,yh); bt&=((~(stbsp__uint64)0)<<27); STBSP__COPYFP(bhi,bt); blo = yh-bhi; \
+ ol = ((ahi*bhi-oh)+ahi*blo+alo*bhi)+alo*blo; \
+}
+
+#define stbsp__ddtoS64(ob,xh,xl) \
+{ \
+ double ahi=0,alo,vh,t;\
+ ob = (stbsp__int64)ph;\
+ vh=(double)ob;\
+ ahi = ( xh - vh );\
+ t = ( ahi - xh );\
+ alo = (xh-(ahi-t))-(vh+t);\
+ ob += (stbsp__int64)(ahi+alo+xl);\
+}
+
+
+#define stbsp__ddrenorm(oh,ol) { double s; s=oh+ol; ol=ol-(s-oh); oh=s; }
+
+#define stbsp__ddmultlo(oh,ol,xh,xl,yh,yl) \
+ ol = ol + ( xh*yl + xl*yh ); \
+
+#define stbsp__ddmultlos(oh,ol,xh,yl) \
+ ol = ol + ( xh*yl ); \
+
+static void stbsp__raise_to_power10( double *ohi, double *olo, double d, stbsp__int32 power ) // power can be -323 to +350
+{
+ double ph, pl;
+ if ((power>=0) && (power<=22))
+ {
+ stbsp__ddmulthi(ph,pl,d,stbsp__bot[power]);
+ }
+ else
+ {
+ stbsp__int32 e,et,eb;
+ double p2h,p2l;
+
+ e=power; if (power<0) e=-e;
+ et = (e*0x2c9)>>14;/* %23 */ if (et>13) et=13; eb = e-(et*23);
+
+ ph = d; pl = 0.0;
+ if (power<0)
+ {
+ if (eb) { --eb; stbsp__ddmulthi(ph,pl,d,stbsp__negbot[eb]); stbsp__ddmultlos(ph,pl,d,stbsp__negboterr[eb]); }
+ if (et)
+ {
+ stbsp__ddrenorm(ph,pl);
+ --et; stbsp__ddmulthi(p2h,p2l,ph,stbsp__negtop[et]); stbsp__ddmultlo(p2h,p2l,ph,pl,stbsp__negtop[et],stbsp__negtoperr[et]); ph=p2h;pl=p2l;
+ }
+ }
+ else
+ {
+ if (eb)
+ {
+ e = eb; if (eb>22) eb=22; e -= eb;
+ stbsp__ddmulthi(ph,pl,d,stbsp__bot[eb]);
+ if ( e ) { stbsp__ddrenorm(ph,pl); stbsp__ddmulthi(p2h,p2l,ph,stbsp__bot[e]); stbsp__ddmultlos(p2h,p2l,stbsp__bot[e],pl); ph=p2h;pl=p2l; }
+ }
+ if (et)
+ {
+ stbsp__ddrenorm(ph,pl);
+ --et; stbsp__ddmulthi(p2h,p2l,ph,stbsp__top[et]); stbsp__ddmultlo(p2h,p2l,ph,pl,stbsp__top[et],stbsp__toperr[et]); ph=p2h;pl=p2l;
+ }
+ }
+ }
+ stbsp__ddrenorm(ph,pl);
+ *ohi = ph; *olo = pl;
+}
+
+// given a float value, returns the significant bits in bits, and the position of the
+// decimal point in decimal_pos. +/-INF and NAN are specified by special values
+// returned in the decimal_pos parameter.
+// frac_digits is absolute normally, but if you want from first significant digits (got %g and %e), or in 0x80000000
+static stbsp__int32 stbsp__real_to_str( char const * * start, stbsp__uint32 * len, char *out, stbsp__int32 * decimal_pos, double value, stbsp__uint32 frac_digits )
+{
+ double d;
+ stbsp__int64 bits = 0;
+ stbsp__int32 expo, e, ng, tens;
+
+ d = value;
+ STBSP__COPYFP(bits,d);
+ expo = (stbsp__int32) ((bits >> 52) & 2047);
+ ng = (stbsp__int32)(bits >> 63);
+ if (ng) d=-d;
+
+ if ( expo == 2047 ) // is nan or inf?
+ {
+ *start = (bits&((((stbsp__uint64)1)<<52)-1)) ? "NaN" : "Inf";
+ *decimal_pos = STBSP__SPECIAL;
+ *len = 3;
+ return ng;
+ }
+
+ if ( expo == 0 ) // is zero or denormal
+ {
+ if ((bits<<1)==0) // do zero
+ {
+ *decimal_pos = 1;
+ *start = out;
+ out[0] = '0'; *len = 1;
+ return ng;
+ }
+ // find the right expo for denormals
+ {
+ stbsp__int64 v = ((stbsp__uint64)1)<<51;
+ while ((bits&v)==0) { --expo; v >>= 1; }
+ }
+ }
+
+ // find the decimal exponent as well as the decimal bits of the value
+ {
+ double ph,pl;
+
+ // log10 estimate - very specifically tweaked to hit or undershoot by no more than 1 of log10 of all expos 1..2046
+ tens=expo-1023; tens = (tens<0)?((tens*617)/2048):(((tens*1233)/4096)+1);
+
+ // move the significant bits into position and stick them into an int
+ stbsp__raise_to_power10( &ph, &pl, d, 18-tens );
+
+ // get full as much precision from double-double as possible
+ stbsp__ddtoS64( bits, ph,pl );
+
+ // check if we undershot
+ if ( ((stbsp__uint64)bits) >= stbsp__tento19th ) ++tens;
+ }
+
+ // now do the rounding in integer land
+ frac_digits = ( frac_digits & 0x80000000 ) ? ( (frac_digits&0x7ffffff) + 1 ) : ( tens + frac_digits );
+ if ( ( frac_digits < 24 ) )
+ {
+ stbsp__uint32 dg = 1; if ((stbsp__uint64)bits >= stbsp__powten[9] ) dg=10; while( (stbsp__uint64)bits >= stbsp__powten[dg] ) { ++dg; if (dg==20) goto noround; }
+ if ( frac_digits < dg )
+ {
+ stbsp__uint64 r;
+ // add 0.5 at the right position and round
+ e = dg - frac_digits;
+ if ( (stbsp__uint32)e >= 24 ) goto noround;
+ r = stbsp__powten[e];
+ bits = bits + (r/2);
+ if ( (stbsp__uint64)bits >= stbsp__powten[dg] ) ++tens;
+ bits /= r;
+ }
+ noround:;
+ }
+
+ // kill long trailing runs of zeros
+ if ( bits )
+ {
+ stbsp__uint32 n;
+ for(;;) { if ( bits<=0xffffffff ) break; if (bits%1000) goto donez; bits/=1000; }
+ n = (stbsp__uint32)bits;
+ while ((n%1000)==0) n/=1000;
+ bits=n;
+ donez:;
+ }
+
+ // convert to string
+ out += 64;
+ e = 0;
+ for(;;)
+ {
+ stbsp__uint32 n;
+ char * o = out-8;
+ // do the conversion in chunks of U32s (avoid most 64-bit divides, worth it, constant denomiators be damned)
+ if (bits>=100000000) { n = (stbsp__uint32)( bits % 100000000); bits /= 100000000; } else {n = (stbsp__uint32)bits; bits = 0; }
+ while(n) { out-=2; *(stbsp__uint16*)out=*(stbsp__uint16*)&stbsp__digitpair[(n%100)*2]; n/=100; e+=2; }
+ if (bits==0) { if ((e) && (out[0]=='0')) { ++out; --e; } break; }
+ while( out!=o ) { *--out ='0'; ++e; }
+ }
+
+ *decimal_pos = tens;
+ *start = out;
+ *len = e;
+ return ng;
+}
+
+#undef stbsp__ddmulthi
+#undef stbsp__ddrenorm
+#undef stbsp__ddmultlo
+#undef stbsp__ddmultlos
+#undef STBSP__SPECIAL
+#undef STBSP__COPYFP
+
+#endif // STB_SPRINTF_NOFLOAT
+
+// clean up
+#undef stbsp__uint16
+#undef stbsp__uint32
+#undef stbsp__int32
+#undef stbsp__uint64
+#undef stbsp__int64
+#undef STBSP__UNALIGNED
+
+#endif // STB_SPRINTF_IMPLEMENTATION
projects / henge / apc.git / blobdiff