3 * - By John Hodge (thePowersGang)
6 * - Kernel-land C Library
9 #include <hal_proc.h> // For MM_*
13 #define RANDOM_SEED 0xACE55052
14 #define RANDOM_A 0x00731ADE
15 #define RANDOM_C 12345
16 #define RANDOM_SPRUCE 0xf12b039
20 unsigned long long strtoull(const char *str, char **end, int base);
21 unsigned long strtoul(const char *str, char **end, int base);
22 signed long long strtoll(const char *str, char **end, int base);
23 signed long strtol(const char *str, char **end, int base);
24 int atoi(const char *string);
25 int ParseInt(const char *string, int *Val);
26 void itoa(char *buf, Uint64 num, int base, int minLength, char pad);
27 int vsnprintf(char *__s, size_t __maxlen, const char *__format, va_list args);
28 int snprintf(char *__s, size_t __n, const char *__format, ...);
29 int sprintf(char *__s, const char *__format, ...);
30 int strucmp(const char *Str1, const char *Str2);
31 char *strchr(const char *__s, int __c);
32 int strpos(const char *Str, char Ch);
33 size_t strlen(const char *__s);
34 char *strcpy(char *__str1, const char *__str2);
35 char *strncpy(char *__str1, const char *__str2, size_t max);
36 char *strcat(char *dest, const char *source);
37 int strcmp(const char *str1, const char *str2);
38 int strncmp(const char *str1, const char *str2, size_t num);
39 char *_strdup(const char *File, int Line, const char *Str);
41 void *memmove(void *__dest, const void *__src, size_t len);
43 int CheckString(char *String);
44 int CheckMem(void *Mem, int NumBytes);
67 EXPORT(_strdup); // Takes File/Line too
75 // - Import userland stroi.c file
77 #include "../../Usermode/Libraries/libc.so_src/strtoi.c"
79 int ParseInt(const char *string, int *Val)
83 const char *orig_string = string;
85 //Log("atoi: (string='%s')", string);
87 // Clear non-numeric characters
88 while( !('0' <= *string && *string <= '9') && *string != '-' ) string++;
89 if( *string == '-' ) {
91 while( !('0' <= *string && *string <= '9') ) string++;
103 if('0' <= *string && *string <= '9') {
105 ret += *string - '0';
107 else if('A' <= *string && *string <= 'F') {
109 ret += *string - 'A' + 10;
111 else if('a' <= *string && *string <= 'f') {
113 ret += *string - 'a' + 10;
121 for( ; '0' <= *string && *string <= '7'; string ++ )
124 ret += *string - '0';
130 for( ; '0' <= *string && *string <= '9'; string++)
133 ret += *string - '0';
136 if( ret == 0 ) return 0;
141 //Log("atoi: RETURN %i", ret);
145 return string - orig_string;
148 static const char cUCDIGITS[] = "0123456789ABCDEF";
150 * \fn void itoa(char *buf, Uint64 num, int base, int minLength, char pad)
151 * \brief Convert an integer into a character string
153 void itoa(char *buf, Uint64 num, int base, int minLength, char pad)
163 if(base > 16 || base < 2) {
169 while(num > base-1) {
170 num = DivMod64U(num, base, &rem); // Shift `num` and get remainder
173 tmpBuf[pos] = cUCDIGITS[ rem ];
176 tmpBuf[pos++] = cUCDIGITS[ num ]; // Last digit of `num`
181 while(minLength-- > 0) buf[i++] = pad;
182 while(pos-- > 0) buf[i++] = tmpBuf[pos]; // Reverse the order of characters
187 * \brief Append a character the the vsnprintf output
189 #define PUTCH(ch) do { \
190 if(pos < __maxlen) { \
191 if(__s) __s[pos] = ch; \
197 #define GETVAL() do {\
198 if(isLongLong) val = va_arg(args, Uint64);\
199 else val = va_arg(args, unsigned int);\
202 * \brief VArg String Number Print Formatted
204 int vsnprintf(char *__s, size_t __maxlen, const char *__format, va_list args)
207 int minSize = 0, precision = -1, len;
208 char tmpBuf[34]; // For Integers
209 const char *p = NULL;
210 int isLongLong = 0, isLong;
216 while((c = *__format++) != 0)
218 // Non control character
219 if(c != '%') { PUTCH(c); continue; }
225 if(c == '%') { PUTCH('%'); continue; }
227 // Pointer - Done first for debugging
229 Uint ptr = va_arg(args, Uint);
230 PUTCH('*'); PUTCH('0'); PUTCH('x');
231 for( len = BITS/4; len -- && ((ptr>>(len*4))&15) == 0; )
238 PUTCH( cUCDIGITS[ (ptr>>(len*4))&15 ] );
245 // - Padding Side Flag
260 if(c == '*') { // Dynamic length
261 minSize = va_arg(args, unsigned int);
264 else if('1' <= c && c <= '9')
267 while('0' <= c && c <= '9')
282 if(c == '*') { // Dynamic length
283 precision = va_arg(args, unsigned int);
286 else if('1' <= c && c <= '9')
289 while('0' <= c && c <= '9')
292 precision += c - '0';
298 // - Default, Long or LongLong?
300 if(c == 'l') // Long is actually the default on x86
310 // - Now get the format code
317 if( isLongLong && val >> 63 ) {
321 else if( !isLongLong && val >> 31 ) {
325 itoa(tmpBuf, val, 10, minSize, pad);
327 case 'u': // Unsigned
329 itoa(tmpBuf, val, 10, minSize, pad);
331 case 'P': // Physical Address
334 if(sizeof(tPAddr) > 4) isLongLong = 1;
336 itoa(tmpBuf, val, 16, minSize, pad);
340 isLongLong = 1; // TODO: Handle non-x86 64-bit archs
342 itoa(tmpBuf, val, 16, minSize, pad);
345 case 'x': // Lower case hex
347 itoa(tmpBuf, val, 16, minSize, pad);
351 itoa(tmpBuf, val, 8, minSize, pad);
355 itoa(tmpBuf, val, 2, minSize, pad);
359 val = va_arg(args, unsigned int);
364 // String - Null Terminated Array
367 Uint16 *p16 = va_arg(args, Uint16*);
369 while( *p16 && precision-- ) {
371 p16 += ReadUTF16(p16, &cp);
372 tmp[WriteUTF8(tmp, cp)] = 0;
373 for(int i = 0; tmp[i] && i<5; i ++)
378 p = va_arg(args, char*); // Get Argument
379 if( !p || !CheckString(p) ) p = "(inval)"; // Avoid #PFs
383 if( !bPadLeft ) while(len++ < minSize) PUTCH(pad);
384 while(*p && precision--) { PUTCH(*p); p++;}
385 if( bPadLeft ) while(len++ < minSize) PUTCH(pad);
388 case 'C': // Non-Null Terminated Character Array
389 p = va_arg(args, char*);
390 if( !CheckMem(p, minSize) ) continue; // No #PFs please
391 if(!p) goto printString;
407 if(__s && pos != __maxlen)
416 int snprintf(char *__s, size_t __n, const char *__format, ...)
421 va_start(args, __format);
422 ret = vsnprintf(__s, __n, __format, args);
430 int sprintf(char *__s, const char *__format, ...)
435 va_start(args, __format);
436 ret = vsnprintf(__s, -1, __format, args);
449 return isalpha(c) || isdigit(c);
453 return isupper(c) || islower(c);
457 return (0 <= c && c < 128);
461 if(c == '\t') return 1;
462 if(c == ' ') return 1;
467 // TODO: Check iscntrl
468 if(c < ' ') return 1;
473 return ('0' <= c && c <= '9');
477 // TODO: Check isgraph
482 return ('a' <= c && c <= 'z');
486 if( ' ' <= c && c <= 0x7F ) return 1;
502 if(c == ' ') return 1;
503 if(c == '\t') return 1;
504 if(c == '\v') return 1;
505 if(c == '\n') return 1;
506 if(c == '\r') return 1;
511 return ('A' <= c && c <= 'Z');
515 return isdigit(c) || ('a' <= c && c <= 'f') || ('A' <= c && c <= 'F');
534 * \fn int strucmp(const char *Str1, const char *Str2)
535 * \brief Compare \a Str1 and \a Str2 case-insensitively
537 int strucmp(const char *Str1, const char *Str2)
539 while(*Str1 && tolower(*Str1) == tolower(*Str2))
541 return tolower(*Str1) - tolower(*Str2);
545 * \brief Locate a byte in a string
547 char *strchr(const char *__s, int __c)
549 for( ; *__s; __s ++ )
551 if( *__s == __c ) return (char*)__s;
556 char *strrchr(const char *__s, int __c)
558 size_t ofs = strlen(__s);
559 while(--ofs && __s[ofs] != __c);
560 if( __s[ofs] == __c )
561 return (char*)__s + ofs;
566 * \fn int strpos(const char *Str, char Ch)
567 * \brief Search a string for an ascii character
569 int strpos(const char *Str, char Ch)
572 for(pos=0;Str[pos];pos++)
574 if(Str[pos] == Ch) return pos;
580 * \fn size_t strlen(const char *__str)
581 * \brief Get the length of string
583 size_t strlen(const char *__str)
586 while(*__str++) ret++;
591 * \brief Copy a string to a new location
593 char *strcpy(char *__str1, const char *__str2)
596 *__str1++ = *__str2++;
597 *__str1 = '\0'; // Terminate String
602 * \brief Copy a string to a new location
603 * \note Copies at most `max` chars
605 char *strncpy(char *__str1, const char *__str2, size_t __max)
607 while(*__str2 && __max-- >= 1)
608 *__str1++ = *__str2++;
610 *__str1 = '\0'; // Terminate String
615 * \brief Append a string to another
617 char *strcat(char *__dest, const char *__src)
622 *__dest++ = *__src++;
628 * \brief Append at most \a n chars to a string from another
629 * \note At most n+1 chars are written (the dest is always zero terminated)
631 char *strncat(char *__dest, const char *__src, size_t n)
634 while(*__src && n-- >= 1)
635 *__dest++ = *__src++;
641 * \fn int strcmp(const char *str1, const char *str2)
642 * \brief Compare two strings return the difference between
643 * the first non-matching characters.
645 int strcmp(const char *str1, const char *str2)
647 while(*str1 && *str1 == *str2)
649 return *str1 - *str2;
653 * \fn int strncmp(const char *Str1, const char *Str2, size_t num)
654 * \brief Compare strings \a Str1 and \a Str2 to a maximum of \a num characters
656 int strncmp(const char *Str1, const char *Str2, size_t num)
658 if(num == 0) return 0; // TODO: Check what should officially happen here
659 while(--num && *Str1 && *Str1 == *Str2)
666 * \fn char *strdup(const char *Str)
667 * \brief Duplicates a string
669 char *strdup(const char *Str)
672 ret = malloc(strlen(Str)+1);
673 if( !ret ) return NULL;
680 * \fn char *_strdup(const char *File, int Line, const char *Str)
681 * \brief Duplicates a string
683 char *_strdup(const char *File, int Line, const char *Str)
686 ret = Heap_Allocate(File, Line, strlen(Str)+1);
687 if( !ret ) return NULL;
695 * \brief Pseudo random number generator
700 static Uint state = RANDOM_SEED;
702 // Get the next state value
703 giRandomState = (RANDOM_A*state + RANDOM_C);
704 // Check if it has changed, and if it hasn't, change it
705 if(state == old) state += RANDOM_SPRUCE;
708 // http://en.wikipedia.org/wiki/Xorshift
710 static Uint32 x = 123456789;
711 static Uint32 y = 362436069;
712 static Uint32 z = 521288629;
713 static Uint32 w = 88675123;
718 return w = w ^ (w >> 19) ^ t ^ (t >> 8);
722 void *memmove(void *__dest, const void *__src, size_t len)
725 const char *src = __src;
728 if( len == 0 || dest == src )
731 if( (tVAddr)dest > (tVAddr)src + len )
732 return memcpy(dest, src, len);
733 if( (tVAddr)dest + len < (tVAddr)src )
734 return memcpy(dest, src, len);
736 // NOTE: Assumes memcpy works forward
737 if( (tVAddr)dest < (tVAddr)src )
738 return memcpy(dest, src, len);
742 if( (tVAddr)dest < (tVAddr)src )
743 block_size = (tVAddr)src - (tVAddr)dest;
745 block_size = (tVAddr)dest - (tVAddr)src;
749 while(len >= block_size)
751 memcpy(dest, src, block_size);
756 memcpy(dest, src, len);
759 for( int i = len; i--; )
768 // NOTE: Strictly not libc, but lib.c is used by userland code too and hence these two
771 * \name Memory Validation
775 * \brief Checks if a string resides fully in valid memory
777 int CheckString(const char *String)
782 addr = (tVAddr)String;
784 if( !MM_GetPhysAddr( (void*)addr ) )
788 bUser = MM_IsUser( addr );
790 while( *(char*)addr )
792 if( (addr & (PAGE_SIZE-1)) == 0 )
794 if(bUser && !MM_IsUser(addr) )
796 if(!bUser && !MM_GetPhysAddr((void*)addr) )
805 * \brief Check if a sized memory region is valid memory
806 * \return Boolean success
808 int CheckMem(const void *Mem, int NumBytes)
810 return MM_IsValidBuffer( (tVAddr)Mem, NumBytes );