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Ignore whitespace Rev 4054 → Rev 4055

/branches/dd/uspace/lib/libc/generic/string.c
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>
 
 
/* Dummy implementation of mem/ functions */
 
void *memset(void *s, int c, size_t n)
{
char *os = s;
while (n--)
*(os++) = c;
return s;
}
 
struct along {
unsigned long n;
} __attribute__ ((packed));
 
static void *unaligned_memcpy(void *dst, const void *src, size_t n)
{
int i, j;
struct along *adst = dst;
const struct along *asrc = src;
 
for (i = 0; i < n / sizeof(unsigned long); i++)
adst[i].n = asrc[i].n;
for (j = 0; j < n % sizeof(unsigned long); j++)
((unsigned char *) (((unsigned long *) dst) + i))[j] = ((unsigned char *) (((unsigned long *) src) + i))[j];
return (char *) src;
}
 
void *memcpy(void *dst, const void *src, size_t n)
{
int i, j;
 
if (((long) dst & (sizeof(long) - 1)) || ((long) src & (sizeof(long) - 1)))
return unaligned_memcpy(dst, src, n);
 
for (i = 0; i < n / sizeof(unsigned long); i++)
((unsigned long *) dst)[i] = ((unsigned long *) src)[i];
for (j = 0; j < n % sizeof(unsigned long); j++)
((unsigned char *) (((unsigned long *) dst) + i))[j] = ((unsigned char *) (((unsigned long *) src) + i))[j];
return (char *) src;
}
 
void *memmove(void *dst, const void *src, size_t n)
{
int i, j;
if (src > dst)
return memcpy(dst, src, n);
 
for (j = (n % sizeof(unsigned long)) - 1; j >= 0; j--)
((unsigned char *) ((unsigned long *) dst))[j] = ((unsigned char *) ((unsigned long *) src))[j];
 
for (i = n / sizeof(unsigned long) - 1; i >=0 ; i--)
((unsigned long *) dst)[i] = ((unsigned long *) src)[i];
return (char *) src;
}
 
/** 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++;
return (a[c] - b[c]);
}
 
int strncmp(const char *a, const char *b, size_t n)
155,10 → 75,22
}
 
/** 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;
while (a[c] && b[c] && (!(tolower(a[c]) - tolower(b[c]))))
c++;
return (tolower(a[c]) - tolower(b[c]));
}
 
/** 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;
}
 
/** 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
 
/** 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
 
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
}
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
}
 
/** 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
 
 
/** 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;
}
 
char * strdup(const char *s1)
{
size_t len = strlen(s1) + 1;
void *ret = malloc(len);
 
if (ret == NULL)
return (char *) NULL;
 
return (char *) memcpy(ret, s1, len);
}
 
char *strtok(char *s, const char *delim)
{
static char *next;
 
return strtok_r(s, delim, &next);
}
 
char *strtok_r(char *s, const char *delim, char **next)
{
char *start, *end;
 
if (s == NULL)
s = *next;
 
/* Skip over leading delimiters. */
while (*s && (strchr(delim, *s) != NULL)) ++s;
start = s;
 
/* Skip over token characters. */
while (*s && (strchr(delim, *s) == NULL)) ++s;
end = s;
*next = (*s ? s + 1 : s);
 
if (start == end) {
return NULL; /* No more tokens. */
}
 
/* Overwrite delimiter with NULL terminator. */
*end = '\0';
return start;
}
 
/** @}
*/