From 51a788fa9e13ead0c504a1369797f8b49d73634c Mon Sep 17 00:00:00 2001 From: Richard Qin Date: Mon, 5 Jan 2026 01:31:55 +0800 Subject: Important: License changed from MIT to GPL. Rewrote the README based on the actual project. --- stdlib/stb_sprintf.h | 1906 -------------------------------------------------- stdlib/stdio.c | 1127 ----------------------------- stdlib/stdio.h | 100 --- stdlib/string.c | 0 stdlib/string.h | 13 - 5 files changed, 3146 deletions(-) delete mode 100644 stdlib/stb_sprintf.h delete mode 100644 stdlib/stdio.c delete mode 100644 stdlib/stdio.h delete mode 100644 stdlib/string.c delete mode 100644 stdlib/string.h (limited to 'stdlib') diff --git a/stdlib/stb_sprintf.h b/stdlib/stb_sprintf.h deleted file mode 100644 index ca432a6..0000000 --- a/stdlib/stb_sprintf.h +++ /dev/null @@ -1,1906 +0,0 @@ -// stb_sprintf - v1.10 - 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 : hh h ll j z t I64 I32 I -// -// Contributors: -// Fabian "ryg" Giesen (reformatting) -// github:aganm (attribute format) -// -// Contributors (bugfixes): -// github:d26435 -// github:trex78 -// github:account-login -// Jari Komppa (SI suffixes) -// Rohit Nirmal -// Marcin Wojdyr -// Leonard Ritter -// Stefano Zanotti -// Adam Allison -// Arvid Gerstmann -// Markus Kolb -// -// 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(__clang__) - #if defined(__has_feature) && defined(__has_attribute) - #if __has_feature(address_sanitizer) - #if __has_attribute(__no_sanitize__) - #define STBSP__ASAN __attribute__((__no_sanitize__("address"))) - #elif __has_attribute(__no_sanitize_address__) - #define STBSP__ASAN __attribute__((__no_sanitize_address__)) - #elif __has_attribute(__no_address_safety_analysis__) - #define STBSP__ASAN __attribute__((__no_address_safety_analysis__)) - #endif - #endif - #endif -#elif defined(__GNUC__) && (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) - #if defined(__SANITIZE_ADDRESS__) && __SANITIZE_ADDRESS__ - #define STBSP__ASAN __attribute__((__no_sanitize_address__)) - #endif -#endif - -#ifndef STBSP__ASAN -#define STBSP__ASAN -#endif - -#ifdef STB_SPRINTF_STATIC -#define STBSP__PUBLICDEC static -#define STBSP__PUBLICDEF static STBSP__ASAN -#else -#ifdef __cplusplus -#define STBSP__PUBLICDEC extern "C" -#define STBSP__PUBLICDEF extern "C" STBSP__ASAN -#else -#define STBSP__PUBLICDEC extern -#define STBSP__PUBLICDEF STBSP__ASAN -#endif -#endif - -#if defined(__has_attribute) - #if __has_attribute(format) - #define STBSP__ATTRIBUTE_FORMAT(fmt,va) __attribute__((format(printf,fmt,va))) - #endif -#endif - -#ifndef STBSP__ATTRIBUTE_FORMAT -#define STBSP__ATTRIBUTE_FORMAT(fmt,va) -#endif - -#ifdef _MSC_VER -#define STBSP__NOTUSED(v) (void)(v) -#else -#define STBSP__NOTUSED(v) (void)sizeof(v) -#endif - -#include // for va_arg(), va_list() -#include // size_t, ptrdiff_t - -#ifndef STB_SPRINTF_MIN -#define STB_SPRINTF_MIN 512 // how many characters per callback -#endif -typedef char *STBSP_SPRINTFCB(const 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__PUBLICDEC int STB_SPRINTF_DECORATE(vsprintf)(char *buf, char const *fmt, va_list va); -STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(vsnprintf)(char *buf, int count, char const *fmt, va_list va); -STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(sprintf)(char *buf, char const *fmt, ...) STBSP__ATTRIBUTE_FORMAT(2,3); -STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(snprintf)(char *buf, int count, char const *fmt, ...) STBSP__ATTRIBUTE_FORMAT(3,4); - -STBSP__PUBLICDEC int STB_SPRINTF_DECORATE(vsprintfcb)(STBSP_SPRINTFCB *callback, void *user, char *buf, char const *fmt, va_list va); -STBSP__PUBLICDEC void STB_SPRINTF_DECORATE(set_separators)(char comma, char period); - -#endif // STB_SPRINTF_H_INCLUDE - -#ifdef STB_SPRINTF_IMPLEMENTATION - -#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(__powerpc64__) || defined(__aarch64__) || defined(_M_X64) || defined(__x86_64__) || defined(__x86_64) || defined(__s390x__) -#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 struct -{ - short temp; // force next field to be 2-byte aligned - char pair[201]; -} stbsp__digitpair = -{ - 0, - "00010203040506070809101112131415161718192021222324" - "25262728293031323334353637383940414243444546474849" - "50515253545556575859606162636465666768697071727374" - "75767778798081828384858687888990919293949596979899" -}; - -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] = '+'; - } -} - -static STBSP__ASAN stbsp__uint32 stbsp__strlen_limited(char const *s, stbsp__uint32 limit) -{ - char const * sn = s; - - // get up to 4-byte alignment - for (;;) { - if (((stbsp__uintptr)sn & 3) == 0) - break; - - if (!limit || *sn == 0) - return (stbsp__uint32)(sn - s); - - ++sn; - --limit; - } - - // scan over 4 bytes at a time to find terminating 0 - // this will intentionally scan up to 3 bytes past the end of buffers, - // but becase it works 4B aligned, it will never cross page boundaries - // (hence the STBSP__ASAN markup; the over-read here is intentional - // and harmless) - while (limit >= 4) { - stbsp__uint32 v = *(stbsp__uint32 *)sn; - // bit hack to find if there's a 0 byte in there - if ((v - 0x01010101) & (~v) & 0x80808080UL) - break; - - sn += 4; - limit -= 4; - } - - // handle the last few characters to find actual size - while (limit && *sn) { - ++sn; - --limit; - } - - return (stbsp__uint32)(sn - s); -} - -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; - #ifdef STB_SPRINTF_NOUNALIGNED - if(((stbsp__uintptr)bf) & 3) { - bf[0] = f[0]; - bf[1] = f[1]; - bf[2] = f[2]; - bf[3] = f[3]; - } else - #endif - { - *(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; - if (f[0] == 'h') - ++f; // QUARTERWIDTH - break; - // are we 64-bit (unix style) - case 'l': - fl |= ((sizeof(long) == 8) ? STBSP__INTMAX : 0); - ++f; - if (f[0] == 'l') { - fl |= STBSP__INTMAX; - ++f; - } - break; - // are we 64-bit on intmax? (c99) - case 'j': - fl |= (sizeof(size_t) == 8) ? STBSP__INTMAX : 0; - ++f; - break; - // are we 64-bit on size_t or ptrdiff_t? (c99) - case 'z': - fl |= (sizeof(ptrdiff_t) == 8) ? STBSP__INTMAX : 0; - ++f; - break; - case 't': - fl |= (sizeof(ptrdiff_t) == 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, limited to desired precision - // always limit to ~0u chars since our counts are 32b - l = stbsp__strlen_limited(s, (pr >= 0) ? pr : ~0u); - 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; - cs = 0; - STBSP__NOTUSED(dp); - 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 semantics for %f - if (dp > 0) { - pr = (dp < (stbsp__int32)l) ? l - dp : 0; - } else { - pr = -dp + ((pr > (stbsp__int32)l) ? (stbsp__int32) 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 = 0; - 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.pair[(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 volatile *)bf = *(stbsp__uint32 volatile *)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; - int length; - char tmp[STB_SPRINTF_MIN]; -} stbsp__context; - -static char *stbsp__clamp_callback(const char *buf, void *user, int len) -{ - stbsp__context *c = (stbsp__context *)user; - c->length += len; - - if (len > c->count) - len = c->count; - - if (len) { - if (buf != c->buf) { - const char *s, *se; - char *d; - 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 c->tmp; - return (c->count >= STB_SPRINTF_MIN) ? c->buf : c->tmp; // go direct into buffer if you can -} - -static char * stbsp__count_clamp_callback( const char * buf, void * user, int len ) -{ - stbsp__context * c = (stbsp__context*)user; - (void) sizeof(buf); - - c->length += 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; - - if ( (count == 0) && !buf ) - { - c.length = 0; - - STB_SPRINTF_DECORATE( vsprintfcb )( stbsp__count_clamp_callback, &c, c.tmp, fmt, va ); - } - else - { - int l; - - c.buf = buf; - c.count = count; - c.length = 0; - - 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 c.length; -} - -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)((stbsp__uint64) 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)xh; \ - 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)((stbsp__uint64) 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 (((stbsp__uint64) 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.pair[(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. ------------------------------------------------------------------------------- -*/ diff --git a/stdlib/stdio.c b/stdlib/stdio.c deleted file mode 100644 index aa13e25..0000000 --- a/stdlib/stdio.c +++ /dev/null @@ -1,1127 +0,0 @@ -#include "stdio.h" - -/* Include STB Sprintf Implementation */ -#define STB_SPRINTF_IMPLEMENTATION -#include "stb_sprintf.h" - -/* Syscall Implementation */ - -const int64 STDIN_FD = 0; -const int64 STDOUT_FD = 1; -const int64 STDERR_FD = 2; - -#if defined(__x86_64__) - -const int64 SYS_read = 0; -const int64 SYS_write = 1; -const int64 SYS_open = 2; -const int64 SYS_close = 3; -const int64 SYS_lseek = 8; - -int64 write(int64 fd, const char *buf, uint64 count) -{ - int64 ret; - __asm__ volatile("syscall" : "=a"(ret) : "a"(SYS_write), "D"(fd), "S"(buf), "d"(count) : "rcx", "r11", "memory"); - return ret; -} -int64 read(int64 fd, char *buf, uint64 count) -{ - int64 ret; - __asm__ volatile("syscall" : "=a"(ret) : "a"(SYS_read), "D"(fd), "S"(buf), "d"(count) : "rcx", "r11", "memory"); - return ret; -} -int64 open(const char *path, int flags, int mode) -{ - int64 ret; - __asm__ volatile("syscall" : "=a"(ret) : "a"(SYS_open), "D"(path), "S"(flags), "d"(mode) : "rcx", "r11", "memory"); - return ret; -} -int64 close(int64 fd) -{ - int64 ret; - __asm__ volatile("syscall" : "=a"(ret) : "a"(SYS_close), "D"(fd) : "rcx", "r11", "memory"); - return ret; -} -int64 lseek(int64 fd, int64 offset, int whence) -{ - int64 ret; - __asm__ volatile("syscall" : "=a"(ret) : "a"(SYS_lseek), "D"(fd), "S"(offset), "d"(whence) : "rcx", "r11", "memory"); - return ret; -} - -#elif defined(__riscv) - -const int64 SYS_read = 63; -const int64 SYS_write = 64; -const int64 SYS_open = 56; // openat -const int64 SYS_close = 57; -const int64 SYS_lseek = 62; - -int64 write(int64 fd, const char *buf, uint64 count) -{ - register int64 a7 asm("a7") = SYS_write; - register int64 a0 asm("a0") = fd; - register int64 a1 asm("a1") = (int64)buf; - register int64 a2 asm("a2") = count; - __asm__ volatile("ecall" : "+r"(a0) : "r"(a7), "r"(a0), "r"(a1), "r"(a2) : "memory"); - return a0; -} -int64 read(int64 fd, char *buf, uint64 count) -{ - register int64 a7 asm("a7") = SYS_read; - register int64 a0 asm("a0") = fd; - register int64 a1 asm("a1") = (int64)buf; - register int64 a2 asm("a2") = count; - __asm__ volatile("ecall" : "+r"(a0) : "r"(a7), "r"(a0), "r"(a1), "r"(a2) : "memory"); - return a0; -} -int64 open(const char *path, int flags, int mode) -{ - register int64 a7 asm("a7") = SYS_open; - register int64 a0 asm("a0") = -100; // AT_FDCWD - register int64 a1 asm("a1") = (int64)path; - register int64 a2 asm("a2") = flags; - register int64 a3 asm("a3") = mode; - __asm__ volatile("ecall" : "+r"(a0) : "r"(a7), "r"(a0), "r"(a1), "r"(a2), "r"(a3) : "memory"); - return a0; -} -int64 close(int64 fd) -{ - register int64 a7 asm("a7") = SYS_close; - register int64 a0 asm("a0") = fd; - __asm__ volatile("ecall" : "+r"(a0) : "r"(a7), "r"(a0) : "memory"); - return a0; -} -int64 lseek(int64 fd, int64 offset, int whence) -{ - register int64 a7 asm("a7") = SYS_lseek; - register int64 a0 asm("a0") = fd; - register int64 a1 asm("a1") = offset; - register int64 a2 asm("a2") = whence; - __asm__ volatile("ecall" : "+r"(a0) : "r"(a7), "r"(a0), "r"(a1), "r"(a2) : "memory"); - return a0; -} - -#else -#error "Architecture not supported" -#endif - -/* Memory and String Functions */ - -void *memset(void *dst, int c, uint64 n) -{ - char *cdst = (char *)dst; - for (uint64 i = 0; i < n; i++) - cdst[i] = (char)c; - return dst; -} - -void *memmove(void *vdst, const void *vsrc, uint64 n) -{ - char *dst = (char *)vdst; - const char *src = (const char *)vsrc; - if (dst == src) - return vdst; - if (src > dst) - { - while (n--) - *dst++ = *src++; - } - else - { - dst += n; - src += n; - while (n-- > 0) - *--dst = *--src; - } - return vdst; -} - -void *memcpy(void *vdst, const void *vsrc, uint64 n) { return memmove(vdst, vsrc, n); } - -int memcmp(const void *s1, const void *s2, uint64 n) -{ - const unsigned char *p1 = (const unsigned char *)s1; - const unsigned char *p2 = (const unsigned char *)s2; - while (n--) - { - if (*p1 != *p2) - return *p1 - *p2; - p1++; - p2++; - } - return 0; -} - -uint64 strlen(const char *s) -{ - const char *p = s; - while (*p) - p++; - return (uint64)(p - s); -} - -char *strcpy(char *dst, const char *src) -{ - char *os = dst; - while ((*dst++ = *src++) != 0) - ; - return os; -} - -char *strcat(char *dst, const char *src) -{ - char *os = dst; - while (*dst) - dst++; - while ((*dst++ = *src++) != 0) - ; - return os; -} - -int strcmp(const char *p, const char *q) -{ - while (*p && *p == *q) - { - p++; - q++; - } - return (int)((unsigned char)*p - (unsigned char)*q); -} - -static int isspace(int c) -{ - return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; -} - -int64 strtoll(const char *str, char **endptr, int base) -{ - const char *s = str; - int64 acc = 0; - int c; - int neg = 0; - int any = 0; - - while (isspace(*s)) - s++; - if (*s == '-') - { - neg = 1; - s++; - } - else if (*s == '+') - { - s++; - } - - if ((base == 0 || base == 16) && *s == '0' && (s[1] == 'x' || s[1] == 'X')) - { - c = s[2]; - s += 2; - base = 16; - } - else if (base == 0 && *s == '0') - { - base = 8; - } - else if (base == 0) - { - base = 10; - } - - for (;; c = *s++) - { - c = *s; - if (c >= '0' && c <= '9') - c -= '0'; - else if (c >= 'A' && c <= 'Z') - c -= 'A' - 10; - else if (c >= 'a' && c <= 'z') - c -= 'a' - 10; - else - break; - if (c >= base) - break; - if (any < 0 || acc > (0x7FFFFFFFFFFFFFFFLL / base)) - any = -1; - else - { - acc *= base; - acc += c; - any = 1; - } - } - if (endptr != 0) - *endptr = (char *)(any ? s : str); - return (neg ? -acc : acc); -} - -/* Core Formatting Implementation */ - -static int _ul_to_str_invert(char *buf, uint64 val, int base, int uppercase) -{ - int i = 0; - const char *digits = uppercase ? "0123456789ABCDEF" : "0123456789abcdef"; - if (val == 0) - { - buf[i++] = '0'; - return i; - } - while (val != 0) - { - buf[i++] = digits[val % base]; - val /= base; - } - return i; -} - -typedef struct -{ - char *buf; - uint64 limit; - uint64 written; - int fd; -} _OutContext; - -static void _out_char(_OutContext *ctx, char c) -{ - if (ctx->fd != -1) - { - write(ctx->fd, &c, 1); - ctx->written++; - } - else - { - if (ctx->limit > 0 && ctx->written < ctx->limit - 1) - { - ctx->buf[ctx->written] = c; - } - ctx->written++; - } -} - -static int _vprintf_core(_OutContext *ctx, const char *format, va_list ap) -{ - const char *p = format; - char num_buf[32]; - - while (*p) - { - if (*p != '%') - { - _out_char(ctx, *p++); - continue; - } - p++; - - int flag_left = 0, flag_zero = 0, flag_plus = 0, flag_space = 0, flag_hash = 0; - while (1) - { - if (*p == '-') - flag_left = 1; - else if (*p == '0') - flag_zero = 1; - else if (*p == '+') - flag_plus = 1; - else if (*p == ' ') - flag_space = 1; - else if (*p == '#') - flag_hash = 1; - else - break; - p++; - } - - int width = 0; - if (*p == '*') - { - width = va_arg(ap, int); - if (width < 0) - { - flag_left = 1; - width = -width; - } - p++; - } - else - { - while (*p >= '0' && *p <= '9') - { - width = width * 10 + (*p - '0'); - p++; - } - } - - int precision = -1; - if (*p == '.') - { - p++; - if (*p == '*') - { - precision = va_arg(ap, int); - p++; - } - else - { - precision = 0; - while (*p >= '0' && *p <= '9') - { - precision = precision * 10 + (*p - '0'); - p++; - } - } - } - - int len_mod = 0; - if (*p == 'l') - { - len_mod = 1; - p++; - if (*p == 'l') - { - len_mod = 2; - p++; - } - } - else if (*p == 'z') - { - len_mod = 2; - p++; - } - - char spec = *p++; - if (!spec) - break; - - if (spec == 'd' || spec == 'i' || spec == 'u' || spec == 'x' || spec == 'X' || spec == 'p') - { - uint64 val; - int is_signed = (spec == 'd' || spec == 'i'); - int base = (spec == 'x' || spec == 'X' || spec == 'p') ? 16 : 10; - - if (spec == 'p') - val = (uint64)va_arg(ap, void *); - else if (len_mod == 2) - val = is_signed ? (uint64)va_arg(ap, int64) : va_arg(ap, uint64); - else if (len_mod == 1) - val = is_signed ? (uint64)va_arg(ap, long) : (uint64)va_arg(ap, unsigned long); - else - val = is_signed ? (uint64)((int64)va_arg(ap, int)) : (uint64)va_arg(ap, uint32); - - char sign_char = 0; - if (is_signed) - { - int64 sval = (int64)val; - if (sval < 0) - { - sign_char = '-'; - val = (uint64)(-sval); - } - else if (flag_plus) - sign_char = '+'; - else if (flag_space) - sign_char = ' '; - } - - int digit_len = _ul_to_str_invert(num_buf, val, base, (spec == 'X')); - if (precision >= 0) - flag_zero = 0; - int prec_zeros = (precision > digit_len) ? precision - digit_len : 0; - if (precision == 0 && val == 0) - digit_len = 0; - - int prefix_len = sign_char ? 1 : 0; - char *prefix_str = NULL; - if (spec == 'p' || (flag_hash && val != 0 && (spec == 'x' || spec == 'X'))) - { - prefix_str = (spec == 'X') ? "0X" : "0x"; - prefix_len += 2; - } - - int padding = (width > prefix_len + prec_zeros + digit_len) ? width - (prefix_len + prec_zeros + digit_len) : 0; - - if (!flag_left && !flag_zero) - for (int i = 0; i < padding; i++) - _out_char(ctx, ' '); - if (sign_char) - _out_char(ctx, sign_char); - if (prefix_str) - { - _out_char(ctx, prefix_str[0]); - _out_char(ctx, prefix_str[1]); - } - int total_zeros = prec_zeros + ((flag_zero && !flag_left) ? padding : 0); - for (int i = 0; i < total_zeros; i++) - _out_char(ctx, '0'); - for (int i = digit_len - 1; i >= 0; i--) - _out_char(ctx, num_buf[i]); - if (flag_left) - for (int i = 0; i < padding; i++) - _out_char(ctx, ' '); - } - else if (spec == 'f' || spec == 'F' || spec == 'e' || spec == 'E' || spec == 'g' || spec == 'G') - { - char fmt_tmp[32]; - int f_idx = 0; - fmt_tmp[f_idx++] = '%'; - if (flag_left) - fmt_tmp[f_idx++] = '-'; - if (flag_zero) - fmt_tmp[f_idx++] = '0'; - if (flag_plus) - fmt_tmp[f_idx++] = '+'; - if (flag_space) - fmt_tmp[f_idx++] = ' '; - if (flag_hash) - fmt_tmp[f_idx++] = '#'; - if (width > 0) - f_idx += sprintf(&fmt_tmp[f_idx], "%d", width); - if (precision >= 0) - f_idx += sprintf(&fmt_tmp[f_idx], ".%d", precision); - fmt_tmp[f_idx++] = spec; - fmt_tmp[f_idx] = '\0'; - double f_val = va_arg(ap, double); - char f_buf[128]; - stbsp_snprintf(f_buf, sizeof(f_buf), fmt_tmp, f_val); - for (int i = 0; f_buf[i] != '\0'; i++) - _out_char(ctx, f_buf[i]); - } - else if (spec == 's') - { - const char *s = va_arg(ap, char *); - if (!s) - s = "(null)"; - int len = 0; - const char *tmp = s; - while (*tmp && (precision < 0 || len < precision)) - { - tmp++; - len++; - } - int padding = (width > len) ? width - len : 0; - if (!flag_left) - for (int i = 0; i < padding; i++) - _out_char(ctx, ' '); - for (int i = 0; i < len; i++) - _out_char(ctx, s[i]); - if (flag_left) - for (int i = 0; i < padding; i++) - _out_char(ctx, ' '); - } - else if (spec == 'c') - { - char c = (char)va_arg(ap, int); - int padding = (width > 1) ? width - 1 : 0; - if (!flag_left) - for (int i = 0; i < padding; i++) - _out_char(ctx, ' '); - _out_char(ctx, c); - if (flag_left) - for (int i = 0; i < padding; i++) - _out_char(ctx, ' '); - } - else - { - _out_char(ctx, '%'); - if (spec != '%') - _out_char(ctx, spec); - } - } - return (int)ctx->written; -} - -int vsnprintf(char *str, uint64 size, const char *format, va_list ap) -{ - _OutContext ctx; - ctx.buf = str; - ctx.limit = size; - ctx.written = 0; - ctx.fd = -1; - _vprintf_core(&ctx, format, ap); - if (size > 0) - { - if (ctx.written < size) - str[ctx.written] = '\0'; - else - str[size - 1] = '\0'; - } - return (int)ctx.written; -} -int snprintf(char *str, uint64 size, const char *format, ...) -{ - va_list ap; - va_start(ap, format); - int ret = vsnprintf(str, size, format, ap); - va_end(ap); - return ret; -} -int sprintf(char *str, const char *format, ...) -{ - va_list ap; - va_start(ap, format); - int ret = vsnprintf(str, (uint64)-1, format, ap); - va_end(ap); - return ret; -} -int printf(const char *format, ...) -{ - va_list ap; - va_start(ap, format); - _OutContext ctx; - ctx.buf = NULL; - ctx.limit = 0; - ctx.written = 0; - ctx.fd = STDOUT_FD; - _vprintf_core(&ctx, format, ap); - va_end(ap); - return (int)ctx.written; -} - -/* Core Function Implementation */ - -typedef struct -{ - const char *buf; - int fd; - uint64 pos; - int ungotten; -} _InContext; - -static int _in_char(_InContext *ctx) -{ - if (ctx->ungotten >= 0) - { - int c = ctx->ungotten; - ctx->ungotten = -1; - return c; - } - if (ctx->fd == -1) - { - if (ctx->buf[ctx->pos] == '\0') - return -1; - return (unsigned char)ctx->buf[ctx->pos++]; - } - char c; - if (read(ctx->fd, &c, 1) == 1) - return (unsigned char)c; - return -1; -} - -static void _unget_char(_InContext *ctx, int c) -{ - if (c != -1) - ctx->ungotten = c; -} -static void _skip_space(_InContext *ctx) -{ - int c; - while ((c = _in_char(ctx)) != -1) - { - if (!isspace(c)) - { - _unget_char(ctx, c); - break; - } - } -} - -static double _simple_strtod(const char *str, char **endptr) -{ - double val = 0.0; - int sign = 1; - if (*str == '-') - { - sign = -1; - str++; - } - else if (*str == '+') - str++; - while (*str >= '0' && *str <= '9') - { - val = val * 10.0 + (*str - '0'); - str++; - } - if (*str == '.') - { - str++; - double div = 10.0; - while (*str >= '0' && *str <= '9') - { - val += (*str - '0') / div; - div *= 10.0; - str++; - } - } - if (*str == 'e' || *str == 'E') - { - str++; - int esign = 1; - if (*str == '-') - { - esign = -1; - str++; - } - else if (*str == '+') - str++; - int eval = 0; - while (*str >= '0' && *str <= '9') - { - eval = eval * 10 + (*str - '0'); - str++; - } - double p = 1.0; - while (eval--) - p *= 10.0; - if (esign == 1) - val *= p; - else - val /= p; - } - if (endptr) - *endptr = (char *)str; - return sign * val; -} - -static int _vscanf_core(_InContext *ctx, const char *format, va_list ap) -{ - int assigned = 0; - const char *p = format; - while (*p) - { - if (isspace(*p)) - { - _skip_space(ctx); - while (isspace(*p)) - p++; - continue; - } - if (*p != '%') - { - _skip_space(ctx); - int c = _in_char(ctx); - if (c != *p) - { - _unget_char(ctx, c); - return assigned; - } - p++; - continue; - } - p++; - int suppress = 0; - if (*p == '*') - { - suppress = 1; - p++; - } - int width = -1; - while (*p >= '0' && *p <= '9') - { - if (width == -1) - width = 0; - width = width * 10 + (*p - '0'); - p++; - } - int len_mod = 0; - if (*p == 'l') - { - len_mod = 1; - p++; - if (*p == 'l') - { - len_mod = 2; - p++; - } - } - else if (*p == 'h') - { - p++; - if (*p == 'h') - p++; - } - char spec = *p++; - if (!spec) - break; - - if (spec == 'd' || spec == 'i' || spec == 'u' || spec == 'x') - { - _skip_space(ctx); - char num_buf[64]; - int i = 0, c = _in_char(ctx); - if (c == '-' || c == '+') - { - num_buf[i++] = (char)c; - c = _in_char(ctx); - } - int base = (spec == 'x') ? 16 : (spec == 'i' ? 0 : 10); - while (c != -1 && i < 63) - { - int digit = (c >= '0' && c <= '9'); - int hex = (base == 16 || base == 0) && ((c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')); - int x = (c == 'x' || c == 'X'); - if (base == 0 && i == 1 && num_buf[0] == '0' && x) - base = 16; - if (width > 0 && i >= width) - break; - if (digit || hex || x) - { - num_buf[i++] = (char)c; - c = _in_char(ctx); - } - else - break; - } - num_buf[i] = '\0'; - _unget_char(ctx, c); - if (i == 0) - return assigned; - if (!suppress) - { - int64 val = strtoll(num_buf, NULL, base); - if (len_mod == 2) - *va_arg(ap, int64 *) = val; - else if (len_mod == 1) - *va_arg(ap, long *) = (long)val; - else - *va_arg(ap, int *) = (int)val; - assigned++; - } - } - else if (spec == 'f' || spec == 'F' || spec == 'e' || spec == 'E' || spec == 'g' || spec == 'G') - { - _skip_space(ctx); - char num_buf[64]; - int i = 0, c = _in_char(ctx); - if (c == '-' || c == '+') - { - num_buf[i++] = (char)c; - c = _in_char(ctx); - } - while (c != -1 && i < 63) - { - if ((c >= '0' && c <= '9') || c == '.' || c == 'e' || c == 'E' || c == '+' || c == '-') - { - num_buf[i++] = (char)c; - c = _in_char(ctx); - } - else - break; - } - num_buf[i] = '\0'; - _unget_char(ctx, c); - if (i == 0) - return assigned; - if (!suppress) - { - double val = _simple_strtod(num_buf, NULL); - if (len_mod == 1) - *va_arg(ap, double *) = val; - else - *va_arg(ap, float *) = (float)val; - assigned++; - } - } - else if (spec == 's') - { - _skip_space(ctx); - char *buf = suppress ? NULL : va_arg(ap, char *); - int i = 0, c = _in_char(ctx); - while (c != -1 && !isspace(c)) - { - if (width > 0 && i >= width) - break; - if (!suppress) - buf[i] = (char)c; - i++; - c = _in_char(ctx); - } - if (!suppress) - buf[i] = '\0'; - _unget_char(ctx, c); - if (i > 0 && !suppress) - assigned++; - } - else if (spec == 'c') - { - int count = (width > 0) ? width : 1; - char *buf = suppress ? NULL : va_arg(ap, char *); - for (int i = 0; i < count; i++) - { - int c = _in_char(ctx); - if (c == -1) - return assigned; - if (!suppress) - buf[i] = (char)c; - } - if (!suppress) - assigned++; - } - } - return assigned; -} - -int sscanf(const char *str, const char *format, ...) -{ - va_list ap; - va_start(ap, format); - _InContext ctx; - ctx.buf = str; - ctx.fd = -1; - ctx.pos = 0; - ctx.ungotten = -1; - int ret = _vscanf_core(&ctx, format, ap); - va_end(ap); - return ret; -} -int scanf(const char *format, ...) -{ - va_list ap; - va_start(ap, format); - _InContext ctx; - ctx.buf = NULL; - ctx.fd = STDIN_FD; - ctx.pos = 0; - ctx.ungotten = -1; - int ret = _vscanf_core(&ctx, format, ap); - va_end(ap); - return ret; -} - -/* FILE Stream Implementation */ - -#define O_RDONLY 00 -#define O_WRONLY 01 -#define O_RDWR 02 -#define O_CREAT 0100 -#define O_TRUNC 01000 -#define O_APPEND 02000 - -#define MAX_FILES 8 -static FILE _file_pool[MAX_FILES]; -static FILE _stdin = {.fd = 0, .used = 1}; -static FILE _stdout = {.fd = 1, .used = 1}; -static FILE _stderr = {.fd = 2, .used = 1}; - -FILE *stdin = &_stdin; -FILE *stdout = &_stdout; -FILE *stderr = &_stderr; - -FILE *fopen(const char *filename, const char *mode) -{ - int flags = 0; - if (strcmp(mode, "r") == 0) - flags = O_RDONLY; - else if (strcmp(mode, "w") == 0) - flags = O_WRONLY | O_CREAT | O_TRUNC; - else if (strcmp(mode, "a") == 0) - flags = O_WRONLY | O_CREAT | O_APPEND; - else if (strcmp(mode, "r+") == 0) - flags = O_RDWR; - else - return NULL; - - FILE *f = NULL; - for (int i = 0; i < MAX_FILES; i++) - if (!_file_pool[i].used) - { - f = &_file_pool[i]; - break; - } - if (!f) - return NULL; - - int64 fd = open(filename, flags, 0666); - if (fd < 0) - return NULL; - f->fd = (int)fd; - f->flags = flags; - f->error = 0; - f->eof = 0; - f->used = 1; - return f; -} - -int fclose(FILE *stream) -{ - if (!stream || !stream->used) - return -1; - if (stream == stdin || stream == stdout || stream == stderr) - return 0; - close(stream->fd); - stream->used = 0; - stream->fd = -1; - return 0; -} - -int fflush(FILE *stream) { return 0; } - -int fprintf(FILE *stream, const char *format, ...) -{ - if (!stream) - return -1; - va_list ap; - va_start(ap, format); - _OutContext ctx; - ctx.buf = NULL; - ctx.limit = 0; - ctx.written = 0; - ctx.fd = stream->fd; - _vprintf_core(&ctx, format, ap); - va_end(ap); - return (int)ctx.written; -} - -int fscanf(FILE *stream, const char *format, ...) -{ - if (!stream) - return -1; - va_list ap; - va_start(ap, format); - _InContext ctx; - ctx.buf = NULL; - ctx.fd = stream->fd; - ctx.pos = 0; - ctx.ungotten = -1; - int ret = _vscanf_core(&ctx, format, ap); - va_end(ap); - return ret; -} - -int fputc(int c, FILE *stream) -{ - if (!stream) - return -1; - char ch = (char)c; - write(stream->fd, &ch, 1); - return c; -} - -int fputs(const char *s, FILE *stream) -{ - if (!stream) - return -1; - write(stream->fd, s, strlen(s)); - return 0; -} - -int fgetc(FILE *stream) -{ - if (!stream) - return -1; - char c; - if (read(stream->fd, &c, 1) == 1) - return (unsigned char)c; - stream->eof = 1; - return -1; -} - -char *fgets(char *str, int n, FILE *stream) -{ - if (!stream || !stream->used || n <= 0) - return NULL; - int i = 0, c; - while (i < n - 1) - { - c = fgetc(stream); - if (c == -1) - { - if (i == 0) - return NULL; - break; - } - str[i++] = (char)c; - if (c == '\n') - break; - } - str[i] = '\0'; - return str; -} - -uint64 fread(void *ptr, uint64 size, uint64 nmemb, FILE *stream) -{ - if (!stream || !stream->used || !ptr || size == 0 || nmemb == 0) - return 0; - uint64 total = size * nmemb, read_bytes = 0; - char *p = (char *)ptr; - while (read_bytes < total) - { - int64 ret = read(stream->fd, p + read_bytes, total - read_bytes); - if (ret > 0) - read_bytes += ret; - else if (ret == 0) - { - stream->eof = 1; - break; - } - else - { - stream->error = 1; - break; - } - } - return read_bytes / size; -} - -uint64 fwrite(const void *ptr, uint64 size, uint64 nmemb, FILE *stream) -{ - if (!stream || !stream->used || !ptr || size == 0 || nmemb == 0) - return 0; - uint64 total = size * nmemb, written = 0; - const char *p = (const char *)ptr; - while (written < total) - { - int64 ret = write(stream->fd, p + written, total - written); - if (ret > 0) - written += ret; - else - { - stream->error = 1; - break; - } - } - return written / size; -} - -int fseek(FILE *stream, long offset, int whence) -{ - if (!stream || !stream->used) - return -1; - stream->eof = 0; - if (lseek(stream->fd, offset, whence) < 0) - { - stream->error = 1; - return -1; - } - return 0; -} -long ftell(FILE *stream) -{ - if (!stream || !stream->used) - return -1L; - int64 ret = lseek(stream->fd, 0, SEEK_CUR); - if (ret < 0) - { - stream->error = 1; - return -1L; - } - return (long)ret; -} -void rewind(FILE *stream) -{ - if (stream) - { - fseek(stream, 0, SEEK_SET); - stream->error = 0; - } -} - -int feof(FILE *stream) { return (stream && stream->used) ? stream->eof : 1; } -int ferror(FILE *stream) { return (stream && stream->used) ? stream->error : 1; } -void clearerr(FILE *stream) -{ - if (stream && stream->used) - { - stream->error = 0; - stream->eof = 0; - } -} \ No newline at end of file diff --git a/stdlib/stdio.h b/stdlib/stdio.h deleted file mode 100644 index 1fd66b7..0000000 --- a/stdlib/stdio.h +++ /dev/null @@ -1,100 +0,0 @@ -/* Standard I/O Library for Lume OS */ - -#ifndef _STDIO_H -#define _STDIO_H - -#include - -/*Type Definition (Adjusted According to Architecture)*/ -#ifndef NULL -#define NULL ((void *)0) -#endif - -/*Macro definition*/ -#define EOF (-1) - -#define SEEK_SET 0 -#define SEEK_CUR 1 -#define SEEK_END 2 - -/* Basic integer types */ -typedef unsigned int uint; -typedef unsigned short ushort; -typedef unsigned char uchar; - -typedef unsigned char uint8; -typedef unsigned short uint16; -typedef unsigned int uint32; -typedef unsigned long long uint64; - -typedef char int8; -typedef short int16; -typedef int int32; -typedef long long int64; -typedef long long intptr_t; - -/* FILE structure */ -typedef struct -{ - int fd; // File descriptor - int flags; // Status flag - int error; // Error flag - int eof; // EOF flag - int used; // Static pool occupancy flag -} FILE; - -/* standard stream object */ -extern FILE *stdin; -extern FILE *stdout; -extern FILE *stderr; - -/* Function Declaration */ - -/* File Operations */ -FILE *fopen(const char *filename, const char *mode); -int fclose(FILE *stream); -int fflush(FILE *stream); // Not implement - -/* Formatted input and output */ -int printf(const char *format, ...); -int scanf(const char *format, ...); -int sprintf(char *str, const char *format, ...); -int snprintf(char *str, uint64 size, const char *format, ...); -int vsnprintf(char *str, uint64 size, const char *format, va_list ap); -int sscanf(const char *str, const char *format, ...); - -int fprintf(FILE *stream, const char *format, ...); -int fscanf(FILE *stream, const char *format, ...); - -/* Character/String Read and Write */ -int fputc(int c, FILE *stream); -int fputs(const char *s, FILE *stream); -int fgetc(FILE *stream); -char *fgets(char *str, int n, FILE *stream); - -/* Common Macros/Wrapper Functions */ -#define getchar() fgetc(stdin) -#define putchar(c) fputc((c), stdout) - -/* Binary read and write */ -uint64 fread(void *ptr, uint64 size, uint64 nmemb, FILE *stream); -uint64 fwrite(const void *ptr, uint64 size, uint64 nmemb, FILE *stream); - -/* File location */ -int fseek(FILE *stream, long offset, int whence); -long ftell(FILE *stream); -void rewind(FILE *stream); - -/* Status Inquiry */ -int feof(FILE *stream); -int ferror(FILE *stream); -void clearerr(FILE *stream); - -/* Low-level system call */ -int64 open(const char *path, int flags, int mode); -int64 close(int64 fd); -int64 read(int64 fd, char *buf, uint64 count); -int64 write(int64 fd, const char *buf, uint64 count); -int64 lseek(int64 fd, int64 offset, int whence); - -#endif /* _STDIO_H */ \ No newline at end of file diff --git a/stdlib/string.c b/stdlib/string.c deleted file mode 100644 index e69de29..0000000 diff --git a/stdlib/string.h b/stdlib/string.h deleted file mode 100644 index aa87489..0000000 --- a/stdlib/string.h +++ /dev/null @@ -1,13 +0,0 @@ -#pragma once -#include "common/types.h" - - -void *memset(void *dst, int c, uint n); -int memcmp(const void *v1, const void *v2, uint n); -void *memmove(void *dst, const void *src, uint n); -void *memcpy(void *dst, const void *src, uint n); - - -void strcpy(char *dst, const char *src); -int strlen(const char *s); -int strcmp(const char *s1, const char *s2); \ No newline at end of file -- cgit v1.2.3