a1c965da1e
Sixty-five headers sat side by side in include/, so `#include "irq.h"` said nothing about where irq.h was or what it belonged to, and errno.h, stat.h and fcntl.h at the top shadowed the system's for any host tool built with -I./include. They are in folders now -- arch/ core/ fs/ dev/ gfx/ net/ uapi/ (and ldls/ for the Linux driver layer) -- and every include names the folder, as Linux's do: "core/proc.h". Done mechanically and checked the hard way: the kernel built from this tree disassembles identically to the one built from the tree before it. The full image boots, and userland is the same set of programs. Paths in docs and comments follow; docs/guides/layout.md has a table of what is where, and tools/fix-includes.py rewrites old-style includes from the folders in the tree, for code written before this. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4
125 lines
2 KiB
C
125 lines
2 KiB
C
#include "core/types.h"
|
|
#include "arch/x86.h"
|
|
|
|
void*
|
|
memset(void *dst, int c, uint64 n)
|
|
{
|
|
uint64 c64;
|
|
|
|
if ((addr_t)dst % 8 == 0 && n % 8 == 0) {
|
|
c &= 0xFF;
|
|
c64 = (uint64)c;
|
|
c64 = (c64 << 56) | (c64 << 48) | (c64 << 40) | (c64 << 32) |
|
|
(c64 << 24) | (c64 << 16) | (c64 << 8) | c64;
|
|
stosq(dst, c64, n / 8);
|
|
} else {
|
|
stosb(dst, c, n);
|
|
}
|
|
return dst;
|
|
}
|
|
|
|
int
|
|
memcmp(const void *v1, const void *v2, uint n)
|
|
{
|
|
const uchar *s1, *s2;
|
|
|
|
s1 = v1;
|
|
s2 = v2;
|
|
while(n-- > 0){
|
|
if(*s1 != *s2)
|
|
return *s1 - *s2;
|
|
s1++, s2++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void*
|
|
memmove(void *dst, const void *src, uint n)
|
|
{
|
|
const char *s;
|
|
char *d;
|
|
|
|
s = src;
|
|
d = dst;
|
|
if(s < d && s + n > d){
|
|
s += n;
|
|
d += n;
|
|
while(n-- > 0)
|
|
*--d = *--s;
|
|
} else
|
|
while(n-- > 0)
|
|
*d++ = *s++;
|
|
|
|
return dst;
|
|
}
|
|
|
|
void*
|
|
memcpy(void *dst, const void *src, uint n)
|
|
{
|
|
return memmove(dst, src, n);
|
|
}
|
|
|
|
int
|
|
strncmp(const char *p, const char *q, uint n)
|
|
{
|
|
while(n > 0 && *p && *p == *q)
|
|
n--, p++, q++;
|
|
if(n == 0)
|
|
return 0;
|
|
return (uchar)*p - (uchar)*q;
|
|
}
|
|
|
|
// Added when lwIP's DNS resolver started needing it: with LWIP_HAVE_LOOPIF on,
|
|
// dns.c short-circuits the name "localhost" with a strcmp. The kernel had only
|
|
// strncmp until then, deliberately -- see the note in kernel/net/lwip/shim/
|
|
// string.h about not growing that shim into a libc.
|
|
int
|
|
strcmp(const char *p, const char *q)
|
|
{
|
|
while(*p && *p == *q)
|
|
p++, q++;
|
|
return (uchar)*p - (uchar)*q;
|
|
}
|
|
|
|
char*
|
|
strncpy(char *s, const char *t, int n)
|
|
{
|
|
char *os = s;
|
|
while(n-- > 0 && (*s++ = *t++) != 0)
|
|
;
|
|
while(n-- > 0)
|
|
*s++ = 0;
|
|
return os;
|
|
}
|
|
|
|
char*
|
|
safestrcpy(char *s, const char *t, int n)
|
|
{
|
|
char *os = s;
|
|
if(n <= 0)
|
|
return os;
|
|
while(--n > 0 && (*s++ = *t++) != 0)
|
|
;
|
|
*s = 0;
|
|
return os;
|
|
}
|
|
|
|
int
|
|
strlen(const char *s)
|
|
{
|
|
int n;
|
|
|
|
for(n = 0; s[n]; n++)
|
|
;
|
|
return n;
|
|
}
|
|
|
|
int
|
|
strnlen(const char *s, int max)
|
|
{
|
|
int n;
|
|
for(n = 0; n < max && s[n]; n++)
|
|
;
|
|
return n;
|
|
}
|