go-pulse/vendor/github.com/mitchellh/go-wordwrap/wordwrap.go
Péter Szilágyi 289b30715d Godeps, vendor: convert dependency management to trash (#3198)
This commit converts the dependency management from Godeps to the vendor
folder, also switching the tool from godep to trash. Since the upstream tool
lacks a few features proposed via a few PRs, until those PRs are merged in
(if), use github.com/karalabe/trash.

You can update dependencies via trash --update.

All dependencies have been updated to their latest version.

Parts of the build system are reworked to drop old notions of Godeps and
invocation of the go vet command so that it doesn't run against the vendor
folder, as that will just blow up during vetting.

The conversion drops OpenCL (and hence GPU mining support) from ethash and our
codebase. The short reasoning is that there's noone to maintain and having
opencl libs in our deps messes up builds as go install ./... tries to build
them, failing with unsatisfied link errors for the C OpenCL deps.

golang.org/x/net/context is not vendored in. We expect it to be fetched by the
user (i.e. using go get). To keep ci.go builds reproducible the package is
"vendored" in build/_vendor.
2016-10-28 19:05:01 +02:00

74 lines
1.6 KiB
Go

package wordwrap
import (
"bytes"
"unicode"
)
// WrapString wraps the given string within lim width in characters.
//
// Wrapping is currently naive and only happens at white-space. A future
// version of the library will implement smarter wrapping. This means that
// pathological cases can dramatically reach past the limit, such as a very
// long word.
func WrapString(s string, lim uint) string {
// Initialize a buffer with a slightly larger size to account for breaks
init := make([]byte, 0, len(s))
buf := bytes.NewBuffer(init)
var current uint
var wordBuf, spaceBuf bytes.Buffer
for _, char := range s {
if char == '\n' {
if wordBuf.Len() == 0 {
if current+uint(spaceBuf.Len()) > lim {
current = 0
} else {
current += uint(spaceBuf.Len())
spaceBuf.WriteTo(buf)
}
spaceBuf.Reset()
} else {
current += uint(spaceBuf.Len() + wordBuf.Len())
spaceBuf.WriteTo(buf)
spaceBuf.Reset()
wordBuf.WriteTo(buf)
wordBuf.Reset()
}
buf.WriteRune(char)
current = 0
} else if unicode.IsSpace(char) {
if spaceBuf.Len() == 0 || wordBuf.Len() > 0 {
current += uint(spaceBuf.Len() + wordBuf.Len())
spaceBuf.WriteTo(buf)
spaceBuf.Reset()
wordBuf.WriteTo(buf)
wordBuf.Reset()
}
spaceBuf.WriteRune(char)
} else {
wordBuf.WriteRune(char)
if current+uint(spaceBuf.Len()+wordBuf.Len()) > lim && uint(wordBuf.Len()) < lim {
buf.WriteRune('\n')
current = 0
spaceBuf.Reset()
}
}
}
if wordBuf.Len() == 0 {
if current+uint(spaceBuf.Len()) <= lim {
spaceBuf.WriteTo(buf)
}
} else {
spaceBuf.WriteTo(buf)
wordBuf.WriteTo(buf)
}
return buf.String()
}