1 /* FILENAME: stdlib.c
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3 * Functions normally found in a standard C lib.
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5 * 12/28/2005 - added memcmp and memmove
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7 * Notes: These functions support ASCII only!!!
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10 //#include "m51cn128evb.h"
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17 /****************************************************************/
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21 if ((ch == ' ') || (ch == '\t')) /* \n ??? */
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27 /****************************************************************/
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32 if (((ch >= '0') && (ch <= '9')) ||
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33 ((ch >= 'A') && (ch <= 'Z')) ||
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34 ((ch >= 'a') && (ch <= 'z')))
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40 /****************************************************************/
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45 if ((ch >= '0') && (ch <= '9'))
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51 /****************************************************************/
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56 if ((ch >= 'A') && (ch <= 'Z'))
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62 /****************************************************************/
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64 strcasecmp (const char *s1, const char *s2)
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73 if ((c1 >= 'a') && (c1 <= 'z'))
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74 c1 = (char)(c1 - ' ');
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75 if ((c2 >= 'a') && (c2 <= 'z'))
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76 c2 = (char)(c2 - ' ');
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77 if ((result = (c1 - c2)) != 0)
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79 if ((c1 == 0) || (c2 == 0))
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86 /****************************************************************/
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88 stricmp (const char *s1, const char *s2)
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90 return (strcasecmp(s1, s2));
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93 /****************************************************************/
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95 strncasecmp (const char *s1, const char *s2, int n)
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105 if ((c1 >= 'a') && (c1 <= 'z'))
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106 c1 = (char)(c1 - ' ');
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107 if ((c2 >= 'a') && (c2 <= 'z'))
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108 c2 = (char)(c2 - ' ');
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109 if ((result = (c1 - c2)) != 0)
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111 if ((c1 == 0) || (c2 == 0))
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117 /****************************************************************/
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119 strnicmp (const char *s1, const char *s2, int n)
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121 return (strncasecmp(s1, s2, n));
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124 /****************************************************************/
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126 strtoul (char *str, char **ptr, int base)
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128 unsigned long rvalue = 0;
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132 /* Validate parameters */
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133 if ((str != NULL) && (base >= 0) && (base <= 36))
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135 /* Skip leading white spaces */
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136 while (isspace(*str))
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141 /* Check for notations */
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147 if ((str[1] == 'x') || (str[1] == 'X'))
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176 /* Valid "digits" are 0..9, A..Z, a..z */
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177 while (isalnum(c = *str))
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179 /* Convert char to num in 0..36 */
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180 if ((c -= ('a' - 10)) < 10) /* 'a'..'z' */
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182 if ((c += ('a' - 'A')) < 10) /* 'A'..'Z' */
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184 c += ('A' - '0' - 10); /* '0'..'9' */
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188 /* check c against base */
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196 rvalue = (rvalue * base) - c;
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200 rvalue = (rvalue * base) + c;
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207 /* Upon exit, 'str' points to the character at which valid info */
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208 /* STOPS. No chars including and beyond 'str' are used. */
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216 /****************************************************************/
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218 atoi (const char *str)
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220 char *s = (char *)str;
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222 return ((int)strtoul(s, NULL, 10));
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225 /****************************************************************/
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227 strlen (const char *str)
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229 char *s = (char *)str;
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235 while (*s++ != '\0')
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241 /****************************************************************/
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243 strcat (char *dest, const char *src)
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246 char *sp = (char *)src;
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248 if ((dest != NULL) && (src != NULL))
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250 dp = &dest[strlen(dest)];
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252 while (*sp != '\0')
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261 /****************************************************************/
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263 strncat (char *dest, const char *src, int n)
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266 char *sp = (char *)src;
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268 if ((dest != NULL) && (src != NULL) && (n > 0))
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270 dp = &dest[strlen(dest)];
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272 while ((*sp != '\0') && (n-- > 0))
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281 /****************************************************************/
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283 strcpy (char *dest, const char *src)
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285 char *dp = (char *)dest;
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286 char *sp = (char *)src;
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288 if ((dest != NULL) && (src != NULL))
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290 while (*sp != '\0')
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299 /****************************************************************/
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301 strncpy (char *dest, const char *src, int n)
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303 char *dp = (char *)dest;
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304 char *sp = (char *)src;
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306 if ((dest != NULL) && (src != NULL) && (n > 0))
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308 while ((*sp != '\0') && (n-- > 0))
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317 /****************************************************************/
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319 strcmp (const char *s1, const char *s2)
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321 /* No checks for NULL */
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322 char *s1p = (char *)s1;
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323 char *s2p = (char *)s2;
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325 while (*s2p != '\0')
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333 return (*s1p - *s2p);
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336 /****************************************************************/
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338 strncmp (const char *s1, const char *s2, int n)
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340 /* No checks for NULL */
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341 char *s1p = (char *)s1;
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342 char *s2p = (char *)s2;
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347 while (*s2p != '\0')
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358 return (*s1p - *s2p);
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361 /****************************************************************/
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363 strstr(const char *s1, const char *s2)
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365 char *sp = (char *)s1;
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366 int len1 = strlen(s1);
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367 int len2 = strlen(s2);
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369 while (len1 >= len2)
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371 if (strncmp(sp, s2, len2) == 0)
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382 /****************************************************************/
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384 strchr(const char *str, int c)
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386 char *sp = (char *)str;
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387 char ch = (char)(c & 0xff);
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389 while (*sp != '\0')
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401 /****************************************************************/
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403 memcpy (void *dest, const void *src, unsigned n)
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405 unsigned char *dbp = (unsigned char *)dest;
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406 unsigned char *sbp = (unsigned char *)src;
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408 if ((dest != NULL) && (src != NULL) && (n > 0))
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416 /****************************************************************/
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418 memset (void *s, int c, unsigned n)
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420 /* Not optimized, but very portable */
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421 unsigned char *sp = (unsigned char *)s;
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423 if ((s != NULL) && (n > 0))
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427 *sp++ = (unsigned char)c;
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433 /****************************************************************/
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435 memcmp (const void *s1, const void *s2, unsigned n)
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437 unsigned char *s1p, *s2p;
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439 if (s1 && s2 && (n > 0))
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441 s1p = (unsigned char *)s1;
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442 s2p = (unsigned char *)s2;
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444 while ((--n >= 0) && (*s1p == *s2p))
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447 return (*s1p - *s2p);
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456 /****************************************************************/
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458 memmove (void *dest, const void *src, unsigned n)
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460 unsigned char *dbp = (unsigned char *)dest;
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461 unsigned char *sbp = (unsigned char *)src;
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462 unsigned char *dend = dbp + n;
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463 unsigned char *send = sbp + n;
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465 if ((dest != NULL) && (src != NULL) && (n > 0))
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467 /* see if a memcpy would overwrite source buffer */
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468 if ((sbp < dbp) && (dbp < send))
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471 *(--dend) = *(--send);
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483 /****************************************************************/
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486 strrchr(const char *s, int c)
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488 const char *last = NULL;
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490 return strchr(s, c);
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491 while ((s = strchr(s, c)) != NULL) {
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495 return (char *) last;
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