forked from KolibriOS/kolibrios
135 lines
2.0 KiB
C++
Executable File
135 lines
2.0 KiB
C++
Executable File
/*
|
|
some libC function working with memory
|
|
*/
|
|
|
|
static void *memmove(void *dst,const void *src,size_t length)
|
|
{
|
|
void *value;
|
|
|
|
__asm__ __volatile__(
|
|
"movl %%edi,%%eax\n\t"
|
|
"cld\n\t"
|
|
"rep\n\t"
|
|
"movsb"
|
|
:"=D"(value)
|
|
:"c"(length),"S"(src),"D"(dst)
|
|
:"eax");
|
|
|
|
return(value);
|
|
}
|
|
|
|
static size_t strlen(const char *s)
|
|
{
|
|
size_t i;
|
|
|
|
i=0;
|
|
while(*s!='\0')
|
|
{
|
|
i++;
|
|
s++;
|
|
}
|
|
return(i);
|
|
}
|
|
|
|
static char* strchr(const char *string, int c)
|
|
{
|
|
while(*string!='\0')
|
|
{
|
|
if (*string==(char)c) return((char*)string);
|
|
string++;
|
|
}
|
|
return(NULL);
|
|
}
|
|
|
|
static char* strrchr(const char *string, int c)
|
|
{
|
|
char *s;
|
|
int i,j;
|
|
|
|
s=(char*)string;
|
|
while(*s!='\0') {s++;}
|
|
|
|
j=(int)(s-string);
|
|
s--;
|
|
|
|
for(i=0;i<j;i++)
|
|
{
|
|
if (*s==(char)c) return(s);
|
|
s--;
|
|
}
|
|
|
|
return(NULL);
|
|
}
|
|
|
|
static char* strstr(const char *s1,const char *s2)
|
|
{
|
|
char *s;
|
|
int i,j,len1,len2;
|
|
|
|
len2=strlen(s2);
|
|
if (len2==0) return((char*)s1);
|
|
|
|
len1=strlen(s1);
|
|
for(i=0;i<len1-len2+1;i++)
|
|
{
|
|
if (s1[i]==s2[0])
|
|
{
|
|
for(j=0;j<len2;j++)
|
|
{
|
|
if (s1[i+j]!=s2[j]) break;
|
|
}
|
|
if (j==len2) return((char*)(s1+i));
|
|
}
|
|
}
|
|
return(NULL);
|
|
}
|
|
|
|
static int strcmp(const char* string1, const char* string2)
|
|
{
|
|
while (1)
|
|
{
|
|
if (*string1<*string2)
|
|
return -1;
|
|
if (*string1>*string2)
|
|
return 1;
|
|
if (*string1=='\0')
|
|
return 0;
|
|
string1++;
|
|
string2++;
|
|
}
|
|
}
|
|
|
|
static int strncmp(const char* string1, const char* string2, int count)
|
|
{
|
|
while(count>0 && *string1==*string2)
|
|
{
|
|
if (*string1) return 0;
|
|
++string1;
|
|
++string2;
|
|
--count;
|
|
}
|
|
if(count) return (*string1 - *string2);
|
|
return 0;
|
|
}
|
|
|
|
static int sprintf(char *dest,const char *format,...)
|
|
{
|
|
va_list arg;
|
|
va_start (arg, format);
|
|
return format_print(dest,4096, format, arg);
|
|
}
|
|
|
|
static int snprintf(char *dest, size_t size,const char *format,...)
|
|
{
|
|
va_list arg;
|
|
va_start (arg, format);
|
|
return format_print(dest,size, format, arg);
|
|
}
|
|
|
|
static int vsnprintf(char *dest, size_t size,const char *format,va_list ap)
|
|
{
|
|
return format_print(dest,size, format, ap);
|
|
}
|
|
|
|
|