1,5 → 1,6 |
/* |
* Copyright (c) 2005 Martin Decky |
* Copyright (c) 2008 Jiri Svoboda |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
33,96 → 34,16 |
*/ |
|
#include <string.h> |
#include <unistd.h> |
#include <stdlib.h> |
#include <limits.h> |
#include <ctype.h> |
#include <limits.h> |
#include <align.h> |
#include <sys/types.h> |
#include <malloc.h> |
|
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/* Dummy implementation of mem/ functions */ |
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void *memset(void *s, int c, size_t n) |
{ |
char *os = s; |
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while (n--) |
*(os++) = c; |
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return s; |
} |
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struct along { |
unsigned long n; |
} __attribute__ ((packed)); |
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static void *unaligned_memcpy(void *dst, const void *src, size_t n) |
{ |
int i, j; |
struct along *adst = dst; |
const struct along *asrc = src; |
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for (i = 0; i < n / sizeof(unsigned long); i++) |
adst[i].n = asrc[i].n; |
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for (j = 0; j < n % sizeof(unsigned long); j++) |
((unsigned char *) (((unsigned long *) dst) + i))[j] = ((unsigned char *) (((unsigned long *) src) + i))[j]; |
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return (char *) src; |
} |
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void *memcpy(void *dst, const void *src, size_t n) |
{ |
int i, j; |
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if (((long) dst & (sizeof(long) - 1)) || ((long) src & (sizeof(long) - 1))) |
return unaligned_memcpy(dst, src, n); |
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for (i = 0; i < n / sizeof(unsigned long); i++) |
((unsigned long *) dst)[i] = ((unsigned long *) src)[i]; |
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for (j = 0; j < n % sizeof(unsigned long); j++) |
((unsigned char *) (((unsigned long *) dst) + i))[j] = ((unsigned char *) (((unsigned long *) src) + i))[j]; |
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return (char *) src; |
} |
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void *memmove(void *dst, const void *src, size_t n) |
{ |
int i, j; |
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if (src > dst) |
return memcpy(dst, src, n); |
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for (j = (n % sizeof(unsigned long)) - 1; j >= 0; j--) |
((unsigned char *) ((unsigned long *) dst))[j] = ((unsigned char *) ((unsigned long *) src))[j]; |
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for (i = n / sizeof(unsigned long) - 1; i >=0 ; i--) |
((unsigned long *) dst)[i] = ((unsigned long *) src)[i]; |
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return (char *) src; |
} |
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/** Compare two memory areas. |
/** Count the number of characters in the string, not including terminating 0. |
* |
* @param s1 Pointer to the first area to compare. |
* @param s2 Pointer to the second area to compare. |
* @param len Size of the first area in bytes. Both areas must have the same |
* length. |
* @return If len is 0, return zero. If the areas match, return zero. |
* Otherwise return non-zero. |
* @param str String. |
* @return Number of characters in string. |
*/ |
int bcmp(const char *s1, const char *s2, size_t len) |
{ |
for (; len && *s1++ == *s2++; len--) |
; |
return len; |
} |
|
/** Count the number of characters in the string, not including terminating 0. |
* @param str string |
* @return number of characters in string. |
*/ |
size_t strlen(const char *str) |
{ |
size_t counter = 0; |
141,7 → 62,6 |
c++; |
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return (a[c] - b[c]); |
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} |
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int strncmp(const char *a, const char *b, size_t n) |
155,10 → 75,22 |
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} |
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/** Return pointer to the first occurence of character c in string |
* @param str scanned string |
* @param c searched character (taken as one byte) |
* @return pointer to the matched character or NULL if it is not found in given string. |
int stricmp(const char *a, const char *b) |
{ |
int c = 0; |
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while (a[c] && b[c] && (!(tolower(a[c]) - tolower(b[c])))) |
c++; |
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return (tolower(a[c]) - tolower(b[c])); |
} |
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/** Return pointer to the first occurence of character c in string. |
* |
* @param str Scanned string. |
* @param c Searched character (taken as one byte). |
* @return Pointer to the matched character or NULL if it is not |
* found in given string. |
*/ |
char *strchr(const char *str, int c) |
{ |
171,10 → 103,12 |
return NULL; |
} |
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/** Return pointer to the last occurence of character c in string |
* @param str scanned string |
* @param c searched character (taken as one byte) |
* @return pointer to the matched character or NULL if it is not found in given string. |
/** Return pointer to the last occurence of character c in string. |
* |
* @param str Scanned string. |
* @param c Searched character (taken as one byte). |
* @return Pointer to the matched character or NULL if it is not |
* found in given string. |
*/ |
char *strrchr(const char *str, int c) |
{ |
191,13 → 125,16 |
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/** Convert string to a number. |
* Core of strtol and strtoul functions. |
* @param nptr pointer to string |
* @param endptr if not NULL, function stores here pointer to the first invalid character |
* @param base zero or number between 2 and 36 inclusive |
* @param sgn its set to 1 if minus found |
* @return result of conversion. |
* |
* @param nptr Pointer to string. |
* @param endptr If not NULL, function stores here pointer to the first |
* invalid character. |
* @param base Zero or number between 2 and 36 inclusive. |
* @param sgn It's set to 1 if minus found. |
* @return Result of conversion. |
*/ |
static unsigned long _strtoul(const char *nptr, char **endptr, int base, char *sgn) |
static unsigned long |
_strtoul(const char *nptr, char **endptr, int base, char *sgn) |
{ |
unsigned char c; |
unsigned long result = 0; |
219,7 → 156,8 |
/* FIXME: set errno to EINVAL */ |
return 0; |
} |
if ((base == 16) && (*str == '0') && ((str[1] == 'x') || (str[1] == 'X'))) { |
if ((base == 16) && (*str == '0') && ((str[1] == 'x') || |
(str[1] == 'X'))) { |
str += 2; |
} |
} else { |
238,7 → 176,8 |
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while (*str) { |
c = *str; |
c = (c >= 'a' ? c - 'a' + 10 : (c >= 'A' ? c - 'A' + 10 : (c <= '9' ? c - '0' : 0xff))); |
c = (c >= 'a' ? c - 'a' + 10 : (c >= 'A' ? c - 'A' + 10 : |
(c <= '9' ? c - '0' : 0xff))); |
if (c > base) { |
break; |
} |
257,7 → 196,10 |
} |
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if (str == tmpptr) { |
/* no number was found => first invalid character is the first character of the string */ |
/* |
* No number was found => first invalid character is the first |
* character of the string. |
*/ |
/* FIXME: set errno to EINVAL */ |
str = nptr; |
result = 0; |
275,14 → 217,17 |
} |
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/** Convert initial part of string to long int according to given base. |
* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-'). |
* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one. |
* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8). |
* Otherwise the base 0 is taken as decimal. |
* @param nptr pointer to string |
* @param endptr if not NULL, function stores here pointer to the first invalid character |
* @param base zero or number between 2 and 36 inclusive |
* @return result of conversion. |
* The number may begin with an arbitrary number of whitespaces followed by |
* optional sign (`+' or `-'). If the base is 0 or 16, the prefix `0x' may be |
* inserted and the number will be taken as hexadecimal one. If the base is 0 |
* and the number begin with a zero, number will be taken as octal one (as with |
* base 8). Otherwise the base 0 is taken as decimal. |
* |
* @param nptr Pointer to string. |
* @param endptr If not NULL, function stores here pointer to the first |
* invalid character. |
* @param base Zero or number between 2 and 36 inclusive. |
* @return Result of conversion. |
*/ |
long int strtol(const char *nptr, char **endptr, int base) |
{ |
305,14 → 250,17 |
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/** Convert initial part of string to unsigned long according to given base. |
* The number may begin with an arbitrary number of whitespaces followed by optional sign (`+' or `-'). |
* If the base is 0 or 16, the prefix `0x' may be inserted and the number will be taken as hexadecimal one. |
* If the base is 0 and the number begin with a zero, number will be taken as octal one (as with base 8). |
* Otherwise the base 0 is taken as decimal. |
* @param nptr pointer to string |
* @param endptr if not NULL, function stores here pointer to the first invalid character |
* @param base zero or number between 2 and 36 inclusive |
* @return result of conversion. |
* The number may begin with an arbitrary number of whitespaces followed by |
* optional sign (`+' or `-'). If the base is 0 or 16, the prefix `0x' may be |
* inserted and the number will be taken as hexadecimal one. If the base is 0 |
* and the number begin with a zero, number will be taken as octal one (as with |
* base 8). Otherwise the base 0 is taken as decimal. |
* |
* @param nptr Pointer to string. |
* @param endptr If not NULL, function stores here pointer to the first |
* invalid character |
* @param base Zero or number between 2 and 36 inclusive. |
* @return Result of conversion. |
*/ |
unsigned long strtoul(const char *nptr, char **endptr, int base) |
{ |
353,5 → 301,48 |
return orig; |
} |
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char * strdup(const char *s1) |
{ |
size_t len = strlen(s1) + 1; |
void *ret = malloc(len); |
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if (ret == NULL) |
return (char *) NULL; |
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return (char *) memcpy(ret, s1, len); |
} |
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char *strtok(char *s, const char *delim) |
{ |
static char *next; |
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return strtok_r(s, delim, &next); |
} |
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char *strtok_r(char *s, const char *delim, char **next) |
{ |
char *start, *end; |
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if (s == NULL) |
s = *next; |
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/* Skip over leading delimiters. */ |
while (*s && (strchr(delim, *s) != NULL)) ++s; |
start = s; |
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/* Skip over token characters. */ |
while (*s && (strchr(delim, *s) == NULL)) ++s; |
end = s; |
*next = (*s ? s + 1 : s); |
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if (start == end) { |
return NULL; /* No more tokens. */ |
} |
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/* Overwrite delimiter with NULL terminator. */ |
*end = '\0'; |
return start; |
} |
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/** @} |
*/ |