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/*--------------------------------------------------------------------
 * TITLE: ANSI C Library
 * AUTHOR: Steve Rhoads (rhoadss@yahoo.com)
 * DATE CREATED: 12/17/05
 * FILENAME: clib.c
 * PROJECT: Plasma CPU core
 * COPYRIGHT: Software placed into the public domain by the author.
 *    Software 'as is' without warranty.  Author liable for nothing.
 * DESCRIPTION:
 *    Subset of the ANSI C library
 *--------------------------------------------------------------------*/
#define NO_ELLIPSIS
#include "plasma.h"
#include "rtos.h"
 
 
char *strcpy(char *dst, const char *src)
{
   int c;
   do
   {
      c = *dst++ = *src++;
   } while(c);
   return dst;
}
 
 
char *strncpy(char *dst, const char *src, int count)
{
   int c=1;
   while(count-- > 0 && c)
      c = *dst++ = *src++;
   *dst = 0;
   return dst;
}
 
 
char *strcat(char *dst, const char *src)
{
   int c;
   while(*dst)
      ++dst;
   do
   {
      c = *dst++ = *src++;
   } while(c);
   return dst;
}
 
 
char *strncat(char *dst, const char *src, int count)
{
   int c=1;
   while(*dst && --count > 0)
      ++dst;
   while(--count > 0 && c)
      c = *dst++ = *src++;
   *dst = 0;
   return dst;
}
 
 
int strcmp(const char *string1, const char *string2)
{
   int diff, c;
   for(;;)
   {
      diff = *string1++ - (c = *string2++);
      if(diff)
         return diff;
      if(c == 0)
         return 0;
   }
}
 
 
int strncmp(const char *string1, const char *string2, int count)
{
   int diff, c;
   while(count-- > 0)
   {
      diff = *string1++ - (c = *string2++);
      if(diff)
         return diff;
      if(c == 0)
         return 0;
   }
   return 0;
}
 
 
char *strstr(const char *string, const char *find)
{
   int i;
   for(;;)
   {
      for(i = 0; string[i] == find[i] && find[i]; ++i) ;
      if(find[i] == 0)
         return (char*)string;
      if(*string++ == 0)
         return NULL;
   }
}
 
 
int strlen(const char *string)
{
   const char *base=string;
   while(*string++) ;
   return string - base - 1;
}
 
 
void *memcpy(void *dst, const void *src, unsigned long bytes)
{
   uint8 *Dst = (uint8*)dst;
   uint8 *Src = (uint8*)src;
   while((int)bytes-- > 0)
      *Dst++ = *Src++;
   return dst;
}
 
 
void *memmove(void *dst, const void *src, unsigned long bytes)
{
   uint8 *Dst = (uint8*)dst;
   uint8 *Src = (uint8*)src;
   if(Dst < Src)
   {
      while((int)bytes-- > 0)
         *Dst++ = *Src++;
   }
   else
   {
      Dst += bytes;
      Src += bytes;
      while((int)bytes-- > 0)
         *--Dst = *--Src;
   }
   return dst;
}
 
 
int memcmp(const void *cs, const void *ct, unsigned long bytes)
{
   uint8 *Dst = (uint8*)cs;
   uint8 *Src = (uint8*)ct;
   int diff;
   while((int)bytes-- > 0)
   {
      diff = *Dst++ - *Src++;
      if(diff)
         return diff;
   }
   return 0;
}
 
 
void *memset(void *dst, int c, unsigned long bytes)
{
   uint8 *Dst = (uint8*)dst;
   while((int)bytes-- > 0)
      *Dst++ = (uint8)c;
   return dst;
}
 
 
int abs(int n)
{
   return n>=0 ? n : -n;
}
 
 
static uint32 Rand1=0x1f2bcda3, Rand2=0xdeafbeef, Rand3=0xc5134306;
int rand(void)
{
   int shift;
   Rand1 += 0x13423123 + Rand2;
   Rand2 += 0x2312fdea + Rand3;
   Rand3 += 0xf2a12de1;
   shift = Rand3 & 31;
   Rand1 = (Rand1 << (32 - shift)) | (Rand1 >> shift);
   Rand3 ^= Rand1;
   shift = (Rand3 >> 8) & 31;
   Rand2 = (Rand2 << (32 - shift)) | (Rand2 >> shift);
   return Rand1;
}
 
 
void srand(unsigned int seed)
{
   Rand1 = seed;
}
 
 
long strtol(const char *s, const char **end, int base)
{
   int i;
   unsigned long ch, value=0, neg=0;
 
   if(s[0] == '-')
   {
      neg = 1;
      ++s;
   }
   if(s[0] == '0' && s[1] == 'x')
   {
      base = 16;
      s += 2;
   }
   for(i = 0; i <= 8; ++i)
   {
      ch = *s++;
      if('0' <= ch && ch <= '9')
         ch -= '0';
      else if('A' <= ch && ch <= 'Z')
         ch = ch - 'A' + 10;
      else if('a' <= ch && ch <= 'z')
         ch = ch - 'a' + 10;
      else
         break;
      value = value * base + ch;
   }
   if(end)
      *end = s - 1;
   if(neg)
      value = -(int)value;
   return value;
}
 
 
int atoi(const char *s)
{
   return strtol(s, NULL, 10);
}
 
 
char *itoa(int num, char *dst, int base)
{
   int digit, negate=0, place;
   char c, text[20];
 
   if(base == 10 && num < 0)
   {
      num = -num;
      negate = 1;
   }
   text[16] = 0;
   for(place = 15; place >= 0; --place)
   {
      if(base == 10)
         digit = num % base;
      else
         digit = (unsigned int)num % (unsigned int)base;
      if(num == 0 && place < 15 && base == 10 && negate)
      {
         c = '-';
         negate = 0;
      }
      else if(digit < 10)
         c = (char)('0' + digit);
      else
         c = (char)('a' + digit - 10);
      text[place] = c;
      num = (unsigned int)num / (unsigned int)base;
      if(num == 0 && negate == 0)
         break;
   }
   strcpy(dst, text + place);
   return dst;
}
 
 
int sprintf(char *s, const char *format,
            int arg0, int arg1, int arg2, int arg3,
            int arg4, int arg5, int arg6, int arg7)
{
   int argv[8];
   int argc=0, width, length;
   char f, text[20];
 
   argv[0] = arg0; argv[1] = arg1; argv[2] = arg2; argv[3] = arg3;
   argv[4] = arg4; argv[5] = arg5; argv[6] = arg6; argv[7] = arg7;
 
   for(;;)
   {
      f = *format++;
      if(f == 0)
         return argc;
      else if(f == '%')
      {
         width = 0;
         f = *format++;
         if(f == 0)
            return argc;
         if('0' <= f && f <= '9')
         {
            width = f - '0';
            f = *format++;
            if(f == 0)
               return argc;
            if('0' <= f && f <= '9')
               width = width * 10 + f - '0';
         }
 
         if(f == 'd')
         {
            memset(s, ' ', width);
            itoa(argv[argc++], text, 10);
            length = (int)strlen(text);
            if(width < length)
               width = length;
            strcpy(s + width - length, text);
         }
         else if(f == 'x' || f == 'f')
         {
            memset(s, '0', width);
            itoa(argv[argc++], text, 16);
            length = (int)strlen(text);
            if(width < length)
               width = length;
            strcpy(s + width - length, text);
         }
         else if(f == 'c')
         {
            *s++ = (char)argv[argc++];
            *s = 0;
         }
         else if(f == 's')
         {
            length = strlen((char*)argv[argc]);
            if(width > length)
            {
               memset(s, ' ', width - length);
               s += width - length;
            }
            strcpy(s, (char*)argv[argc++]);
         }
         s += strlen(s);
      }
      else if(f == '\\')
      {
         f = *format++;
         if(f == 0)
            return argc;
         else if(f == 'n')
            *s++ = '\n';
         else if(f == 'r')
            *s++ = '\r';
         else if(f == 't')
            *s++ = '\t';
      }
      else
      {
         *s++ = f;
      }
      *s = 0;
   }
}
 
 
int sscanf(const char *s, const char *format,
           int arg0, int arg1, int arg2, int arg3,
           int arg4, int arg5, int arg6, int arg7)
{
   int argv[8];
   int argc=0, length;
   char f;
 
   argv[0] = arg0; argv[1] = arg1; argv[2] = arg2; argv[3] = arg3;
   argv[4] = arg4; argv[5] = arg5; argv[6] = arg6; argv[7] = arg7;
 
   for(;;)
   {
      if(*s == 0)
         return argc;
      f = *format++;
      if(f == 0)
         return argc;
      else if(f == '%')
      {
         while(isspace(*s))
            ++s;
         f = *format++;
         if(f == 0)
            return argc;
         if(f == 'd')
            *(int*)argv[argc++] = strtol(s, &s, 10);
         else if(f == 'x')
            *(int*)argv[argc++] = strtol(s, &s, 16);
         else if(f == 'c')
            *(char*)argv[argc++] = *s++;
         else if(f == 's')
         {
            length = 0;
            while(!isspace(s[length]))
               ++length;
            strncpy((char*)argv[argc++], s, length);
            s += length;
         }
      }
      else
      {
         if(f == '\\')
         {
            f = *format++;
            if(f == 0)
               return argc;
            else if(f == 'n')
               f = '\n';
            else if(f == 'r')
               f = '\r';
            else if(f == 't')
               f = '\t';
         }
         while(*s && *s != f)
            ++s;
         if(*s)
            ++s;
      }
   }
}
 
 
void dump(const unsigned char *data, int length)
{
   int i, index=0, value;
   char string[80];
   memset(string, 0, sizeof(string));
   for(i = 0; i < length; ++i)
   {
      if((i & 15) == 0)
      {
         if(strlen(string))
            printf("%s\n", string);
         printf("%4x ", i);
         memset(string, 0, sizeof(string));
         index = 0;
      }
      value = data[i];
      printf("%2x ", value);
      if(isprint(value))
         string[index] = (char)value;
      else
         string[index] = '.';
      ++index;
   }
   for(; index < 16; ++index)
      printf("   ");
   printf("%s\n", string);
}
 
 
 

Line No.	Rev	Author	Line
1	138	rhoads	`/*--------------------------------------------------------------------`
2			`* TITLE: ANSI C Library`
3			`* AUTHOR: Steve Rhoads (rhoadss@yahoo.com)`
4			`* DATE CREATED: 12/17/05`
5			`* FILENAME: clib.c`
6			`* PROJECT: Plasma CPU core`
7			`* COPYRIGHT: Software placed into the public domain by the author.`
8			`* Software 'as is' without warranty. Author liable for nothing.`
9			`* DESCRIPTION:`
10			`* Subset of the ANSI C library`
11			`--------------------------------------------------------------------/`
12			`#define NO_ELLIPSIS`
13			`#include "plasma.h"`
14			`#include "rtos.h"`
15
16
17			`char strcpy(char dst, const char *src)`
18			`{`
19			`int c;`
20			`do`
21			`{`
22			`c = dst++ = src++;`
23			`} while(c);`
24			`return dst;`
25			`}`
26
27
28			`char strncpy(char dst, const char *src, int count)`
29			`{`
30			`int c=1;`
31			`while(count-- > 0 && c)`
32			`c = dst++ = src++;`
33			`*dst = 0;`
34			`return dst;`
35			`}`
36
37
38			`char strcat(char dst, const char *src)`
39			`{`
40			`int c;`
41			`while(*dst)`
42			`++dst;`
43			`do`
44			`{`
45			`c = dst++ = src++;`
46			`} while(c);`
47			`return dst;`
48			`}`
49
50
51			`char strncat(char dst, const char *src, int count)`
52			`{`
53			`int c=1;`
54			`while(*dst && --count > 0)`
55			`++dst;`
56			`while(--count > 0 && c)`
57			`c = dst++ = src++;`
58			`*dst = 0;`
59			`return dst;`
60			`}`
61
62
63			`int strcmp(const char string1, const char string2)`
64			`{`
65			`int diff, c;`
66			`for(;;)`
67			`{`
68			`diff = string1++ - (c = string2++);`
69			`if(diff)`
70			`return diff;`
71			`if(c == 0)`
72			`return 0;`
73			`}`
74			`}`
75
76
77			`int strncmp(const char string1, const char string2, int count)`
78			`{`
79			`int diff, c;`
80			`while(count-- > 0)`
81			`{`
82			`diff = string1++ - (c = string2++);`
83			`if(diff)`
84			`return diff;`
85			`if(c == 0)`
86			`return 0;`
87			`}`
88			`return 0;`
89			`}`
90
91
92	149	rhoads	`char strstr(const char string, const char *find)`
93	138	rhoads	`{`
94			`int i;`
95			`for(;;)`
96			`{`
97			`for(i = 0; string[i] == find[i] && find[i]; ++i) ;`
98			`if(find[i] == 0)`
99	149	rhoads	`return (char*)string;`
100	138	rhoads	`if(*string++ == 0)`
101			`return NULL;`
102			`}`
103			`}`
104
105
106			`int strlen(const char *string)`
107			`{`
108			`const char *base=string;`
109			`while(*string++) ;`
110			`return string - base - 1;`
111			`}`
112
113
114			`void memcpy(void dst, const void *src, unsigned long bytes)`
115			`{`
116			`uint8 Dst = (uint8)dst;`
117			`uint8 Src = (uint8)src;`
118			`while((int)bytes-- > 0)`
119			`Dst++ = Src++;`
120			`return dst;`
121			`}`
122
123
124	144	rhoads	`void memmove(void dst, const void *src, unsigned long bytes)`
125			`{`
126			`uint8 Dst = (uint8)dst;`
127			`uint8 Src = (uint8)src;`
128			`if(Dst < Src)`
129			`{`
130			`while((int)bytes-- > 0)`
131			`Dst++ = Src++;`
132			`}`
133			`else`
134			`{`
135			`Dst += bytes;`
136			`Src += bytes;`
137			`while((int)bytes-- > 0)`
138			`--Dst = --Src;`
139			`}`
140			`return dst;`
141			`}`
142
143
144	138	rhoads	`int memcmp(const void cs, const void ct, unsigned long bytes)`
145			`{`
146			`uint8 Dst = (uint8)cs;`
147			`uint8 Src = (uint8)ct;`
148			`int diff;`
149			`while((int)bytes-- > 0)`
150			`{`
151			`diff = Dst++ - Src++;`
152			`if(diff)`
153			`return diff;`
154			`}`
155			`return 0;`
156			`}`
157
158
159			`void memset(void dst, int c, unsigned long bytes)`
160			`{`
161			`uint8 Dst = (uint8)dst;`
162			`while((int)bytes-- > 0)`
163			`*Dst++ = (uint8)c;`
164			`return dst;`
165			`}`
166
167
168			`int abs(int n)`
169			`{`
170			`return n>=0 ? n : -n;`
171			`}`
172
173
174			`static uint32 Rand1=0x1f2bcda3, Rand2=0xdeafbeef, Rand3=0xc5134306;`
175	149	rhoads	`int rand(void)`
176	138	rhoads	`{`
177			`int shift;`
178			`Rand1 += 0x13423123 + Rand2;`
179			`Rand2 += 0x2312fdea + Rand3;`
180			`Rand3 += 0xf2a12de1;`
181			`shift = Rand3 & 31;`
182			`Rand1 = (Rand1 << (32 - shift)) \| (Rand1 >> shift);`
183			`Rand3 ^= Rand1;`
184			`shift = (Rand3 >> 8) & 31;`
185			`Rand2 = (Rand2 << (32 - shift)) \| (Rand2 >> shift);`
186			`return Rand1;`
187			`}`
188
189
190			`void srand(unsigned int seed)`
191			`{`
192			`Rand1 = seed;`
193			`}`
194
195
196			`long strtol(const char s, const char *end, int base)`
197			`{`
198			`int i;`
199			`unsigned long ch, value=0, neg=0;`
200
201			`if(s[0] == '-')`
202			`{`
203			`neg = 1;`
204			`++s;`
205			`}`
206			`if(s[0] == '0' && s[1] == 'x')`
207			`{`
208			`base = 16;`
209			`s += 2;`
210			`}`
211			`for(i = 0; i <= 8; ++i)`
212			`{`
213			`ch = *s++;`
214			`if('0' <= ch && ch <= '9')`
215			`ch -= '0';`
216			`else if('A' <= ch && ch <= 'Z')`
217			`ch = ch - 'A' + 10;`
218			`else if('a' <= ch && ch <= 'z')`
219			`ch = ch - 'a' + 10;`
220			`else`
221			`break;`
222			`value = value * base + ch;`
223			`}`
224			`if(end)`
225			`*end = s - 1;`
226			`if(neg)`
227			`value = -(int)value;`
228			`return value;`
229			`}`
230
231
232			`int atoi(const char *s)`
233			`{`
234			`return strtol(s, NULL, 10);`
235			`}`
236
237
238	149	rhoads	`char itoa(int num, char dst, int base)`
239	138	rhoads	`{`
240	149	rhoads	`int digit, negate=0, place;`
241			`char c, text[20];`
242	138	rhoads
243			`if(base == 10 && num < 0)`
244			`{`
245			`num = -num;`
246			`negate = 1;`
247			`}`
248	149	rhoads	`text[16] = 0;`
249			`for(place = 15; place >= 0; --place)`
250	138	rhoads	`{`
251			`if(base == 10)`
252			`digit = num % base;`
253			`else`
254			`digit = (unsigned int)num % (unsigned int)base;`
255	149	rhoads	`if(num == 0 && place < 15 && base == 10 && negate)`
256	138	rhoads	`{`
257	149	rhoads	`c = '-';`
258	138	rhoads	`negate = 0;`
259			`}`
260			`else if(digit < 10)`
261			`c = (char)('0' + digit);`
262			`else`
263			`c = (char)('a' + digit - 10);`
264	149	rhoads	`text[place] = c;`
265			`num = (unsigned int)num / (unsigned int)base;`
266			`if(num == 0 && negate == 0)`
267			`break;`
268	138	rhoads	`}`
269	149	rhoads	`strcpy(dst, text + place);`
270			`return dst;`
271	138	rhoads	`}`
272
273
274			`int sprintf(char s, const char format,`
275			`int arg0, int arg1, int arg2, int arg3,`
276			`int arg4, int arg5, int arg6, int arg7)`
277			`{`
278			`int argv[8];`
279			`int argc=0, width, length;`
280	149	rhoads	`char f, text[20];`
281	138	rhoads
282			`argv[0] = arg0; argv[1] = arg1; argv[2] = arg2; argv[3] = arg3;`
283			`argv[4] = arg4; argv[5] = arg5; argv[6] = arg6; argv[7] = arg7;`
284
285			`for(;;)`
286			`{`
287			`f = *format++;`
288			`if(f == 0)`
289			`return argc;`
290			`else if(f == '%')`
291			`{`
292			`width = 0;`
293			`f = *format++;`
294			`if(f == 0)`
295			`return argc;`
296			`if('0' <= f && f <= '9')`
297			`{`
298			`width = f - '0';`
299			`f = *format++;`
300			`if(f == 0)`
301			`return argc;`
302			`if('0' <= f && f <= '9')`
303			`width = width * 10 + f - '0';`
304			`}`
305
306			`if(f == 'd')`
307	149	rhoads	`{`
308			`memset(s, ' ', width);`
309			`itoa(argv[argc++], text, 10);`
310			`length = (int)strlen(text);`
311			`if(width < length)`
312			`width = length;`
313			`strcpy(s + width - length, text);`
314			`}`
315	138	rhoads	`else if(f == 'x' \|\| f == 'f')`
316	149	rhoads	`{`
317			`memset(s, '0', width);`
318			`itoa(argv[argc++], text, 16);`
319			`length = (int)strlen(text);`
320			`if(width < length)`
321			`width = length;`
322			`strcpy(s + width - length, text);`
323			`}`
324	138	rhoads	`else if(f == 'c')`
325			`{`
326			`*s++ = (char)argv[argc++];`
327			`*s = 0;`
328			`}`
329			`else if(f == 's')`
330			`{`
331			`length = strlen((char*)argv[argc]);`
332			`if(width > length)`
333			`{`
334			`memset(s, ' ', width - length);`
335			`s += width - length;`
336			`}`
337			`strcpy(s, (char*)argv[argc++]);`
338			`}`
339			`s += strlen(s);`
340			`}`
341			`else if(f == '\\')`
342			`{`
343			`f = *format++;`
344			`if(f == 0)`
345			`return argc;`
346			`else if(f == 'n')`
347			`*s++ = '\n';`
348			`else if(f == 'r')`
349			`*s++ = '\r';`
350			`else if(f == 't')`
351			`*s++ = '\t';`
352			`}`
353			`else`
354			`{`
355			`*s++ = f;`
356			`}`
357			`*s = 0;`
358			`}`
359			`}`
360
361
362			`int sscanf(const char s, const char format,`
363			`int arg0, int arg1, int arg2, int arg3,`
364			`int arg4, int arg5, int arg6, int arg7)`
365			`{`
366			`int argv[8];`
367			`int argc=0, length;`
368			`char f;`
369
370			`argv[0] = arg0; argv[1] = arg1; argv[2] = arg2; argv[3] = arg3;`
371			`argv[4] = arg4; argv[5] = arg5; argv[6] = arg6; argv[7] = arg7;`
372
373			`for(;;)`
374			`{`
375			`if(*s == 0)`
376			`return argc;`
377			`f = *format++;`
378			`if(f == 0)`
379			`return argc;`
380			`else if(f == '%')`
381			`{`
382			`while(isspace(*s))`
383			`++s;`
384			`f = *format++;`
385			`if(f == 0)`
386			`return argc;`
387			`if(f == 'd')`
388			`(int)argv[argc++] = strtol(s, &s, 10);`
389			`else if(f == 'x')`
390			`(int)argv[argc++] = strtol(s, &s, 16);`
391			`else if(f == 'c')`
392			`(char)argv[argc++] = *s++;`
393			`else if(f == 's')`
394			`{`
395			`length = 0;`
396			`while(!isspace(s[length]))`
397			`++length;`
398			`strncpy((char*)argv[argc++], s, length);`
399			`s += length;`
400			`}`
401			`}`
402			`else`
403			`{`
404			`if(f == '\\')`
405			`{`
406			`f = *format++;`
407			`if(f == 0)`
408			`return argc;`
409			`else if(f == 'n')`
410			`f = '\n';`
411			`else if(f == 'r')`
412			`f = '\r';`
413			`else if(f == 't')`
414			`f = '\t';`
415			`}`
416			`while(s && s != f)`
417			`++s;`
418			`if(*s)`
419			`++s;`
420			`}`
421			`}`
422			`}`
423
424	149	rhoads
425			`void dump(const unsigned char *data, int length)`
426			`{`
427			`int i, index=0, value;`
428			`char string[80];`
429			`memset(string, 0, sizeof(string));`
430			`for(i = 0; i < length; ++i)`
431			`{`
432			`if((i & 15) == 0)`
433			`{`
434			`if(strlen(string))`
435			`printf("%s\n", string);`
436			`printf("%4x ", i);`
437			`memset(string, 0, sizeof(string));`
438			`index = 0;`
439			`}`
440			`value = data[i];`
441			`printf("%2x ", value);`
442			`if(isprint(value))`
443			`string[index] = (char)value;`
444			`else`
445			`string[index] = '.';`
446			`++index;`
447			`}`
448			`for(; index < 16; ++index)`
449			`printf(" ");`
450			`printf("%s\n", string);`
451			`}`
452
453
454

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