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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "evil_macro.h"
#include "evil_string.h"
/*
* bit related functions
*
*/
char *
strndup(const char *str, size_t n)
{
size_t slen = strlen(str);
char *ret;
if (slen > n) slen = n;
ret = malloc (slen + 1);
if (!ret) return NULL;
if (slen > 0) memcpy(ret, str, slen);
ret[slen] = '\0';
return ret;
}
int ffs(int i)
{
int size;
int x;
if (!i) return 1;
/* remove the sign bit */
x = i & -i;
size = sizeof(int) << 3;
for (i = size; i > 0; --i, x <<= 1)
if (x & (1 << (size - 1))) return i;
return x;
}
char *
strrstr (const char *str, const char *substr)
{
char *it;
char *ret = NULL;
while ((it = strstr(str, substr)))
ret = it;
return ret;
}
char *strcasestr(const char *haystack, const char *needle)
{
size_t length_needle;
size_t length_haystack;
size_t i;
if (!haystack || !needle)
return NULL;
length_needle = strlen(needle);
length_haystack = strlen(haystack);
if (length_haystack < length_needle) return NULL;
length_haystack = length_haystack - length_needle + 1;
for (i = 0; i < length_haystack; i++)
{
size_t j;
for (j = 0; j < length_needle; j++)
{
unsigned char c1;
unsigned char c2;
c1 = haystack[i+j];
c2 = needle[j];
if (toupper(c1) != toupper(c2))
goto next;
}
return (char *) haystack + i;
next:
;
}
return NULL;
}
char *
strsep (char **stringp, const char *delim)
{
char *begin, *end;
begin = *stringp;
if (begin == NULL)
return NULL;
/* A frequent case is when the delimiter string contains only one
character. Here we don't need to call the expensive `strpbrk'
function and instead work using `strchr'. */
if (delim[0] == '\0' || delim[1] == '\0')
{
char ch = delim[0];
if (ch == '\0')
end = NULL;
else
{
if (*begin == ch)
end = begin;
else if (*begin == '\0')
end = NULL;
else
end = strchr (begin + 1, ch);
}
}
else
/* Find the end of the token. */
end = strpbrk (begin, delim);
if (end)
{
/* Terminate the token and set *STRINGP past NUL character. */
*end++ = '\0';
*stringp = end;
}
else
/* No more delimiters; this is the last token. */
*stringp = NULL;
return begin;
}
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