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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ColdFire_MCF52221_CodeWarrior/] [sources/] [stdlib.c] - Blame information for rev 866

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Line No. Rev Author Line
1 578 jeremybenn 
/* FILENAME: stdlib.c
2 
 *
3 
 * Functions normally found in a standard C lib.
4 
 *
5 
 * 12/28/2005 - added memcmp and memmove
6 
 *
7 
 * Notes: These functions support ASCII only!!!
8 
 */
9 
 
10 
#include "support_common.h"
11 
#include "stdlib.h"
12 
 
13 
/***********************************************************************/
14 
/*
15 
 * Misc. Defines
16 
 */
17 
#ifdef  FALSE
18 
#undef  FALSE
19 
#endif
20 
#define FALSE   (0)
21 
 
22 
#ifdef  TRUE
23 
#undef  TRUE
24 
#endif
25 
#define TRUE    (1)
26 
 
27 
#ifdef  NULL
28 
#undef  NULL
29 
#endif
30 
#define NULL    (0)
31 
 
32 
#ifdef  ON
33 
#undef  ON
34 
#endif
35 
#define ON      (1)
36 
 
37 
#ifdef  OFF
38 
#undef  OFF
39 
#endif
40 
#define OFF     (0)
41 
 
42 
 
43 
/****************************************************************/
44 
int
45 
isspace (int ch)
46 
{
47 
        if ((ch == ' ') || (ch == '\t'))        /* \n ??? */
48 
                return TRUE;
49 
        else
50 
                return FALSE;
51 
}
52 
 
53 
/****************************************************************/
54 
int
55 
isalnum (int ch)
56 
{
57 
        /* ASCII only */
58 
        if (((ch >= '0') && (ch <= '9')) ||
59 
                ((ch >= 'A') && (ch <= 'Z')) ||
60 
                ((ch >= 'a') && (ch <= 'z')))
61 
                return TRUE;
62 
        else
63 
                return FALSE;
64 
}
65 
 
66 
/****************************************************************/
67 
int
68 
isdigit (int ch)
69 
{
70 
        /* ASCII only */
71 
        if ((ch >= '0') && (ch <= '9'))
72 
                return TRUE;
73 
        else
74 
                return FALSE;
75 
}
76 
 
77 
/****************************************************************/
78 
int
79 
isupper (int ch)
80 
{
81 
        /* ASCII only */
82 
        if ((ch >= 'A') && (ch <= 'Z'))
83 
                return TRUE;
84 
        else
85 
                return FALSE;
86 
}
87 
 
88 
/****************************************************************/
89 
int
90 
strcasecmp (const char *s1, const char *s2)
91 
{
92 
        char    c1, c2;
93 
        int             result = 0;
94 
 
95 
        while (result == 0)
96 
        {
97 
                c1 = *s1++;
98 
                c2 = *s2++;
99 
                if ((c1 >= 'a') && (c1 <= 'z'))
100 
                        c1 = (char)(c1 - ' ');
101 
                if ((c2 >= 'a') && (c2 <= 'z'))
102 
                        c2 = (char)(c2 - ' ');
103 
                if ((result = (c1 - c2)) != 0)
104 
                        break;
105 
                if ((c1 == 0) || (c2 == 0))
106 
                        break;
107 
        }
108 
        return result;
109 
}
110 
 
111 
 
112 
/****************************************************************/
113 
int
114 
stricmp (const char *s1, const char *s2)
115 
{
116 
   return (strcasecmp(s1, s2));
117 
}
118 
 
119 
/****************************************************************/
120 
int
121 
strncasecmp (const char *s1, const char *s2, int n)
122 
{
123 
        char    c1, c2;
124 
        int             k = 0;
125 
        int             result = 0;
126 
 
127 
        while ( k++ < n )
128 
        {
129 
                c1 = *s1++;
130 
                c2 = *s2++;
131 
                if ((c1 >= 'a') && (c1 <= 'z'))
132 
                        c1 = (char)(c1 - ' ');
133 
                if ((c2 >= 'a') && (c2 <= 'z'))
134 
                        c2 = (char)(c2 - ' ');
135 
                if ((result = (c1 - c2)) != 0)
136 
                        break;
137 
                if ((c1 == 0) || (c2 == 0))
138 
                        break;
139 
        }
140 
        return result;
141 
}
142 
 
143 
/****************************************************************/
144 
int
145 
strnicmp (const char *s1, const char *s2, int n)
146 
{
147 
   return (strncasecmp(s1, s2, n));
148 
}
149 
 
150 
/****************************************************************/
151 
uint32
152 
strtoul (char *str, char **ptr, int base)
153 
{
154 
   unsigned long rvalue = 0;
155 
   int neg = 0;
156 
   int c;
157 
 
158 
   /* Validate parameters */
159 
   if ((str != NULL) && (base >= 0) && (base <= 36))
160 
   {
161 
      /* Skip leading white spaces */
162 
      while (isspace(*str))
163 
      {
164 
         ++str;
165 
        }
166 
 
167 
        /* Check for notations */
168 
       switch (str[0])
169 
        {
170 
                case '0':
171 
          if (base == 0)
172 
          {
173 
             if ((str[1] == 'x') || (str[1] == 'X'))
174 
                                {
175 
                                        base = 16;
176 
                str += 2;
177 
             }
178 
             else
179 
             {
180 
                base = 8;
181 
                str++;
182 
                                }
183 
                        }
184 
                        break;
185 
 
186 
                case '-':
187 
                        neg = 1;
188 
          str++;
189 
          break;
190 
 
191 
       case '+':
192 
          str++;
193 
                        break;
194 
 
195 
                default:
196 
                        break;
197 
        }
198 
 
199 
        if (base == 0)
200 
                base = 10;
201 
 
202 
      /* Valid "digits" are 0..9, A..Z, a..z */
203 
      while (isalnum(c = *str))
204 
      {
205 
                /* Convert char to num in 0..36 */
206 
         if ((c -= ('a' - 10)) < 10)         /* 'a'..'z' */
207 
         {
208 
            if ((c += ('a' - 'A')) < 10)     /* 'A'..'Z' */
209 
            {
210 
               c += ('A' - '0' - 10);        /* '0'..'9' */
211 
                        }
212 
                }
213 
 
214 
                /* check c against base */
215 
                if (c >= base)
216 
                {
217 
                        break;
218 
                }
219 
 
220 
                if (neg)
221 
                {
222 
                        rvalue = (rvalue * base) - c;
223 
                }
224 
                else
225 
                {
226 
                        rvalue = (rvalue * base) + c;
227 
         }
228 
 
229 
         ++str;
230 
                }
231 
        }
232 
 
233 
   /* Upon exit, 'str' points to the character at which valid info */
234 
   /* STOPS.  No chars including and beyond 'str' are used.        */
235 
 
236 
        if (ptr != NULL)
237 
                        *ptr = str;
238 
 
239 
                return rvalue;
240 
        }
241 
 
242 
/****************************************************************/
243 
int
244 
atoi (const char *str)
245 
{
246 
   char *s = (char *)str;
247 
 
248 
   return ((int)strtoul(s, NULL, 10));
249 
}
250 
 
251 
/****************************************************************/
252 
int
253 
strlen (const char *str)
254 
{
255 
        char *s = (char *)str;
256 
        int len = 0;
257 
 
258 
        if (s == NULL)
259 
                return 0;
260 
 
261 
        while (*s++ != '\0')
262 
                ++len;
263 
 
264 
        return len;
265 
}
266 
 
267 
/****************************************************************/
268 
char *
269 
strcat (char *dest, const char *src)
270 
{
271 
        char *dp;
272 
        char *sp = (char *)src;
273 
 
274 
        if ((dest != NULL) && (src != NULL))
275 
        {
276 
                dp = &dest[strlen(dest)];
277 
 
278 
                while (*sp != '\0')
279 
                {
280 
                        *dp++ = *sp++;
281 
                }
282 
                *dp = '\0';
283 
        }
284 
        return dest;
285 
}
286 
 
287 
/****************************************************************/
288 
char *
289 
strncat (char *dest, const char *src, int n)
290 
{
291 
        char *dp;
292 
        char *sp = (char *)src;
293 
 
294 
        if ((dest != NULL) && (src != NULL) && (n > 0))
295 
        {
296 
                dp = &dest[strlen(dest)];
297 
 
298 
                while ((*sp != '\0') && (n-- > 0))
299 
                {
300 
                        *dp++ = *sp++;
301 
                }
302 
                *dp = '\0';
303 
        }
304 
        return dest;
305 
}
306 
 
307 
/****************************************************************/
308 
char *
309 
strcpy (char *dest, const char *src)
310 
{
311 
        char *dp = (char *)dest;
312 
        char *sp = (char *)src;
313 
 
314 
        if ((dest != NULL) && (src != NULL))
315 
        {
316 
                while (*sp != '\0')
317 
                {
318 
                        *dp++ = *sp++;
319 
                }
320 
                *dp = '\0';
321 
        }
322 
        return dest;
323 
}
324 
 
325 
/****************************************************************/
326 
char *
327 
strncpy (char *dest, const char *src, int n)
328 
{
329 
        char *dp = (char *)dest;
330 
        char *sp = (char *)src;
331 
 
332 
        if ((dest != NULL) && (src != NULL) && (n > 0))
333 
        {
334 
                while ((*sp != '\0') && (n-- > 0))
335 
                {
336 
                        *dp++ = *sp++;
337 
                }
338 
                *dp = '\0';
339 
        }
340 
        return dest;
341 
}
342 
 
343 
/****************************************************************/
344 
int
345 
strcmp (const char *s1, const char *s2)
346 
{
347 
        /* No checks for NULL */
348 
        char *s1p = (char *)s1;
349 
        char *s2p = (char *)s2;
350 
 
351 
        while (*s2p != '\0')
352 
        {
353 
                if (*s1p != *s2p)
354 
                        break;
355 
 
356 
                ++s1p;
357 
                ++s2p;
358 
        }
359 
        return (*s1p - *s2p);
360 
}
361 
 
362 
/****************************************************************/
363 
int
364 
strncmp (const char *s1, const char *s2, int n)
365 
{
366 
        /* No checks for NULL */
367 
        char *s1p = (char *)s1;
368 
        char *s2p = (char *)s2;
369 
 
370 
        if (n <= 0)
371 
                return 0;
372 
 
373 
        while (*s2p != '\0')
374 
        {
375 
                if (*s1p != *s2p)
376 
                        break;
377 
 
378 
                if (--n == 0)
379 
                        break;
380 
 
381 
                ++s1p;
382 
                ++s2p;
383 
        }
384 
        return (*s1p - *s2p);
385 
}
386 
 
387 
/****************************************************************/
388 
char *
389 
strstr(const char *s1, const char *s2)
390 
{
391 
   char *sp = (char *)s1;
392 
   int  len1 = strlen(s1);
393 
   int  len2 = strlen(s2);
394 
 
395 
   while (len1 >= len2)
396 
   {
397 
      if (strncmp(sp, s2, len2) == 0)
398 
      {
399 
         return (sp);
400 
      }
401 
      ++sp;
402 
      --len1;
403 
   }
404 
 
405 
   return (NULL);
406 
}
407 
 
408 
/****************************************************************/
409 
char *
410 
strchr(const char *str, int c)
411 
{
412 
   char *sp = (char *)str;
413 
   char  ch = (char)(c & 0xff);
414 
 
415 
   while (*sp != '\0')
416 
   {
417 
      if (*sp == ch)
418 
      {
419 
         return (sp);
420 
      }
421 
      ++sp;
422 
   }
423 
 
424 
   return (NULL);
425 
}
426 
 
427 
/****************************************************************/
428 
void *
429 
memcpy (void *dest, const void *src, unsigned n)
430 
{
431 
        unsigned char *dbp = (unsigned char *)dest;
432 
        unsigned char *sbp = (unsigned char *)src;
433 
 
434 
        if ((dest != NULL) && (src != NULL) && (n > 0))
435 
        {
436 
      while (n--)
437 
                        *dbp++ = *sbp++;
438 
        }
439 
        return dest;
440 
}
441 
 
442 
/****************************************************************/
443 
void *
444 
memset (void *s, int c, unsigned n)
445 
{
446 
        /* Not optimized, but very portable */
447 
        unsigned char *sp = (unsigned char *)s;
448 
 
449 
        if ((s != NULL) && (n > 0))
450 
        {
451 
                while (n--)
452 
                {
453 
                        *sp++ = (unsigned char)c;
454 
                }
455 
        }
456 
        return s;
457 
}
458 
 
459 
/****************************************************************/
460 
int
461 
memcmp (const void *s1, const void *s2, unsigned n)
462 
{
463 
   unsigned char *s1p, *s2p;
464 
 
465 
   if (s1 && s2 && (n > 0))
466 
   {
467 
      s1p = (unsigned char *)s1;
468 
      s2p = (unsigned char *)s2;
469 
 
470 
      while ((--n >= 0) && (*s1p == *s2p))
471 
      {
472 
         if (*s1p != *s2p)
473 
            return (*s1p - *s2p);
474 
         ++s1p;
475 
         ++s2p;
476 
      }
477 
   }
478 
 
479 
   return (0);
480 
}
481 
 
482 
/****************************************************************/
483 
void *
484 
memmove (void *dest, const void *src, unsigned n)
485 
{
486 
   unsigned char *dbp = (unsigned char *)dest;
487 
   unsigned char *sbp = (unsigned char *)src;
488 
   unsigned char *dend = dbp + n;
489 
   unsigned char *send = sbp + n;
490 
 
491 
   if ((dest != NULL) && (src != NULL) && (n > 0))
492 
   {
493 
      /* see if a memcpy would overwrite source buffer */
494 
      if ((sbp < dbp) && (dbp < send))
495 
      {
496 
         while (n--)
497 
            *(--dend) = *(--send);
498 
      }
499 
      else
500 
      {
501 
         while (n--)
502 
            *dbp++ = *sbp++;
503 
      }
504 
   }
505 
 
506 
   return dest;
507 
}
508 
 
509 
/****************************************************************/

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