diff --git a/CMakeLists.txt b/CMakeLists.txt index 8bade911..79c3f8a3 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -335,7 +335,6 @@ set(LOVR_SRC src/lib/map/map.c src/lib/vec/vec.c src/lib/sds/sds.c - src/lib/stb/stb_sprintf.c ) if (LOVR_BUILD_SHARED) diff --git a/src/lib/stb/stb_sprintf.c b/src/lib/stb/stb_sprintf.c deleted file mode 100644 index d60a91ba..00000000 --- a/src/lib/stb/stb_sprintf.c +++ /dev/null @@ -1,2 +0,0 @@ -#define STB_SPRINTF_IMPLEMENTATION -#include "stb_sprintf.h" diff --git a/src/lib/stb/stb_sprintf.h b/src/lib/stb/stb_sprintf.h deleted file mode 100644 index 854aded4..00000000 --- a/src/lib/stb/stb_sprintf.h +++ /dev/null @@ -1,1836 +0,0 @@ -#define STB_SPRINTF_NOFLOAT -#define STB_SPRINTF_DECORATE(name) stb_##name - -// stb_sprintf - v1.05 - 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: -// Fabian "ryg" Giesen (reformatting) -// -// Contributors (bugfixes): -// github:d26435 -// github:trex78 -// Jari Komppa (SI suffixes) -// Rohit Nirmal -// Marcin Wojdyr -// Leonard Ritter -// -// LICENSE: -// -// See end of file for license information. - -#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" 1000 is "1.0 k", "%$.2d" 2536000 is -"2.53 M", etc. For byte values, use two $:s, like "%$$d" to turn -2536000 to "2.42 Mi". If you prefer JEDEC suffixes to SI ones, use three -$:s: "%$$$d" -> "2.42 M". To remove the space between the number and the -suffix, add "_" specifier: "%_$d" -> "2.53M". - -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 // 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 // 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] = - "0001020304050607080910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576" - "7778798081828384858687888990919293949596979899"; - -STBSP__PUBLICDEF void STB_SPRINTF_DECORATE(set_separators)(char pcomma, char pperiod) -{ - stbsp__period = pperiod; - stbsp__comma = pcomma; -} - -#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 -#define STBSP__METRIC_NOSPACE 1024 -#define STBSP__METRIC_1024 2048 -#define STBSP__METRIC_JEDEC 4096 - -static void stbsp__lead_sign(stbsp__uint32 fl, char *sign) -{ - sign[0] = 0; - if (fl & STBSP__NEGATIVE) { - sign[0] = 1; - sign[1] = '-'; - } else if (fl & STBSP__LEADINGSPACE) { - sign[0] = 1; - sign[1] = ' '; - } else if (fl & STBSP__LEADINGPLUS) { - sign[0] = 1; - sign[1] = '+'; - } -} - -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; - - // 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 (none->kilo->kibi->jedec) - case '$': - if (fl & STBSP__METRIC_SUFFIX) { - if (fl & STBSP__METRIC_1024) { - fl |= STBSP__METRIC_JEDEC; - } else { - fl |= STBSP__METRIC_1024; - } - } else { - fl |= STBSP__METRIC_SUFFIX; - } - ++f; - continue; - // if we don't want space between metric suffix and number - case '_': - fl |= STBSP__METRIC_NOSPACE; - ++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': // hex float - case 'a': // hex float - h = (f[0] == 'A') ? hexu : hex; - 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; - - stbsp__lead_sign(fl, lead); - - 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 - case 'g': // float - h = (f[0] == 'G') ? hexu : hex; - 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 - case 'e': // float - h = (f[0] == 'E') ? hexu : hex; - 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; - stbsp__lead_sign(fl, lead); - 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) { - double divisor; - divisor = 1000.0f; - if (fl & STBSP__METRIC_1024) - divisor = 1024.0; - while (fl < 0x4000000) { - if ((fv < divisor) && (fv > -divisor)) - break; - fv /= divisor; - 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; - stbsp__lead_sign(fl, lead); - 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) { - char idx; - idx = 1; - if (fl & STBSP__METRIC_NOSPACE) - idx = 0; - tail[0] = idx; - tail[1] = ' '; - { - if (fl >> 24) { // SI kilo is 'k', JEDEC and SI kibits are 'K'. - if (fl & STBSP__METRIC_1024) - tail[idx + 1] = "_KMGT"[fl >> 24]; - else - tail[idx + 1] = "_kMGT"[fl >> 24]; - idx++; - // If printing kibits and not in jedec, add the 'i'. - if (fl & STBSP__METRIC_1024 && !(fl & STBSP__METRIC_JEDEC)) { - tail[idx + 1] = 'i'; - idx++; - } - tail[0] = idx; - } - } - }; - - flt_lead: - // get the length that we copied - l = (stbsp__uint32)(s - (num + 64)); - s = num + 64; - goto scopy; -#endif - - case 'B': // upper binary - case 'b': // lower binary - h = (f[0] == 'B') ? hexu : hex; - 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 - // fall through - to X - - case 'X': // upper hex - case 'x': // lower hex - h = (f[0] == 'X') ? hexu : hex; - 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) { - do { - s -= 2; - *(stbsp__uint16 *)s = *(stbsp__uint16 *)&stbsp__digitpair[(n % 100) * 2]; - n /= 100; - } while (n); - } - 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; - stbsp__lead_sign(fl, lead); - - // 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 = 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 -} - -static char * stbsp__count_clamp_callback( char * buf, void * user, int len ) -{ - stbsp__context * c = (stbsp__context*)user; - - c->count += len; - return 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) && !buf ) - { - c.count = 0; - - STB_SPRINTF_DECORATE( vsprintfcb )( stbsp__count_clamp_callback, &c, c.tmp, fmt, va ); - l = c.count; - } - else - { - 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 - -/* ------------------------------------------------------------------------------- -This software is available under 2 licenses -- choose whichever you prefer. ------------------------------------------------------------------------------- -ALTERNATIVE A - MIT License -Copyright (c) 2017 Sean Barrett -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. ------------------------------------------------------------------------------- -ALTERNATIVE B - Public Domain (www.unlicense.org) -This is free and unencumbered software released into the public domain. -Anyone is free to copy, modify, publish, use, compile, sell, or distribute this -software, either in source code form or as a compiled binary, for any purpose, -commercial or non-commercial, and by any means. -In jurisdictions that recognize copyright laws, the author or authors of this -software dedicate any and all copyright interest in the software to the public -domain. We make this dedication for the benefit of the public at large and to -the detriment of our heirs and successors. We intend this dedication to be an -overt act of relinquishment in perpetuity of all present and future rights to -this software under copyright law. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ------------------------------------------------------------------------------- -*/