mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-28 05:51:04 +00:00
90 lines
1.7 KiB
C
90 lines
1.7 KiB
C
/* go-int-array-to-string.c -- convert an array of ints to a string in Go.
|
|
|
|
Copyright 2009 The Go Authors. All rights reserved.
|
|
Use of this source code is governed by a BSD-style
|
|
license that can be found in the LICENSE file. */
|
|
|
|
#include "go-assert.h"
|
|
#include "runtime.h"
|
|
#include "arch.h"
|
|
#include "malloc.h"
|
|
|
|
String
|
|
__go_int_array_to_string (const void* p, intgo len)
|
|
{
|
|
const int32 *ints;
|
|
intgo slen;
|
|
intgo i;
|
|
unsigned char *retdata;
|
|
String ret;
|
|
unsigned char *s;
|
|
|
|
ints = (const int32 *) p;
|
|
|
|
slen = 0;
|
|
for (i = 0; i < len; ++i)
|
|
{
|
|
int32 v;
|
|
|
|
v = ints[i];
|
|
|
|
if (v < 0 || v > 0x10ffff)
|
|
v = 0xfffd;
|
|
else if (0xd800 <= v && v <= 0xdfff)
|
|
v = 0xfffd;
|
|
|
|
if (v <= 0x7f)
|
|
slen += 1;
|
|
else if (v <= 0x7ff)
|
|
slen += 2;
|
|
else if (v <= 0xffff)
|
|
slen += 3;
|
|
else
|
|
slen += 4;
|
|
}
|
|
|
|
retdata = runtime_mallocgc ((uintptr) slen, 0, FlagNoScan);
|
|
ret.str = retdata;
|
|
ret.len = slen;
|
|
|
|
s = retdata;
|
|
for (i = 0; i < len; ++i)
|
|
{
|
|
int32 v;
|
|
|
|
v = ints[i];
|
|
|
|
/* If V is out of range for UTF-8, substitute the replacement
|
|
character. */
|
|
if (v < 0 || v > 0x10ffff)
|
|
v = 0xfffd;
|
|
else if (0xd800 <= v && v <= 0xdfff)
|
|
v = 0xfffd;
|
|
|
|
if (v <= 0x7f)
|
|
*s++ = v;
|
|
else if (v <= 0x7ff)
|
|
{
|
|
*s++ = 0xc0 | ((v >> 6) & 0x1f);
|
|
*s++ = 0x80 | (v & 0x3f);
|
|
}
|
|
else if (v <= 0xffff)
|
|
{
|
|
*s++ = 0xe0 | ((v >> 12) & 0xf);
|
|
*s++ = 0x80 | ((v >> 6) & 0x3f);
|
|
*s++ = 0x80 | (v & 0x3f);
|
|
}
|
|
else
|
|
{
|
|
*s++ = 0xf0 | ((v >> 18) & 0x7);
|
|
*s++ = 0x80 | ((v >> 12) & 0x3f);
|
|
*s++ = 0x80 | ((v >> 6) & 0x3f);
|
|
*s++ = 0x80 | (v & 0x3f);
|
|
}
|
|
}
|
|
|
|
__go_assert (s - retdata == slen);
|
|
|
|
return ret;
|
|
}
|