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author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/libgo/runtime/go-int-to-string.c | |
parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/libgo/runtime/go-int-to-string.c')
-rw-r--r-- | gcc-4.9/libgo/runtime/go-int-to-string.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/gcc-4.9/libgo/runtime/go-int-to-string.c b/gcc-4.9/libgo/runtime/go-int-to-string.c new file mode 100644 index 000000000..d90b1ddfe --- /dev/null +++ b/gcc-4.9/libgo/runtime/go-int-to-string.c @@ -0,0 +1,69 @@ +/* go-int-to-string.c -- convert an integer 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 "runtime.h" +#include "arch.h" +#include "malloc.h" + +String +__go_int_to_string (intgo v) +{ + char buf[4]; + int len; + unsigned char *retdata; + String ret; + + /* A negative value is not valid UTF-8; turn it into the replacement + character. */ + if (v < 0) + v = 0xfffd; + + if (v <= 0x7f) + { + buf[0] = v; + len = 1; + } + else if (v <= 0x7ff) + { + buf[0] = 0xc0 + (v >> 6); + buf[1] = 0x80 + (v & 0x3f); + len = 2; + } + else + { + /* If the value is out of range for UTF-8, turn it into the + "replacement character". */ + if (v > 0x10ffff) + v = 0xfffd; + /* If the value is a surrogate pair, which is invalid in UTF-8, + turn it into the replacement character. */ + if (v >= 0xd800 && v < 0xe000) + v = 0xfffd; + + if (v <= 0xffff) + { + buf[0] = 0xe0 + (v >> 12); + buf[1] = 0x80 + ((v >> 6) & 0x3f); + buf[2] = 0x80 + (v & 0x3f); + len = 3; + } + else + { + buf[0] = 0xf0 + (v >> 18); + buf[1] = 0x80 + ((v >> 12) & 0x3f); + buf[2] = 0x80 + ((v >> 6) & 0x3f); + buf[3] = 0x80 + (v & 0x3f); + len = 4; + } + } + + retdata = runtime_mallocgc (len, 0, FlagNoScan); + __builtin_memcpy (retdata, buf, len); + ret.str = retdata; + ret.len = len; + + return ret; +} |