mirror of
https://github.com/golang/go
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doc/go1: syscalls, strconv
R=rsc CC=golang-dev https://golang.org/cl/5472054
This commit is contained in:
Rob Pike
parent
1cb7f85d74
commit
71ccf73a74
120
doc/go1.html
120
doc/go1.html
@ -478,6 +478,9 @@ while <a href="#deleted">others</a> have been deleted outright.
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<th align="left">Old path</th>
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<th align="left">New path</th>
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</tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>asn1</td> <td>encoding/asn1</td></tr>
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<tr><td>csv</td> <td>encoding/csv</td></tr>
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<tr><td>gob</td> <td>encoding/gob</td></tr>
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@ -536,14 +539,33 @@ Gofix will update all imports and package renames for packages that
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remain inside the standard repository. Programs that import packages
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that are no longer in the standard repository will need to be edited
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by hand.
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<font color="red">TODO: should warn about deletions.</font>
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<font color="red">TODO: should also handle packages that move to subrepos.</font>
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<br>
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<font color="red">TODO: gofix should warn about deletions.</font>
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<br>
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<font color="red">TODO: gofix should also handle packages that move to subrepos.</font>
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</p>
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<h3 id="errors">The error type</h3>
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<h3 id="errors">The error type and errors package</h3>
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<h3 id="errno">System call errors</h3>
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<p>
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In Go 1, the
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<a href="http://golang.org/pkg/syscall"><code>syscall</code></a>
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package returns an <code>error</code> for system call errors,
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rather than plain integer <code>errno</code> values.
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On Unix, the implementation is done by a
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<a href="http://golang.org/pkg/syscall/#Errno"><code>syscall.Errno</code></a> type
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that satisfies <code>error</code> and replaces the old <code>os.Errno</code>.
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</p>
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<p>
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<em>Updating</em>:
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Gofix will update almost all code affected by the change.
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Regardless, most code should use the <code>os</code> package
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rather than <code>syscall</code> and so will be unaffected.
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</p>
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<h3 id="time">Time</h3>
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<h3 id="html">The html package</h3>
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@ -552,6 +574,98 @@ by hand.
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<h3 id="strconv">The strconv package</h3>
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<p>
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In Go 1, the
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<a href="http://golang.org/pkg/syscall"><code>strconv</code></a>
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package has been significantly reworked to make it more Go-like and less C-like,
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although <code>Atoi</code> lives on (it's similar to
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<code>int(ParseInt(x, 10, 0))</code>, as does
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<code>Itoa(x)</code> (<code>FormatInt(int64(x), 10)</code>).
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There are also new variants of some of the functions that append to byte slices rather than
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return strings, to allow control over allocation.
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</p>
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<p>
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This table summarizes the renamings; see the
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<a href="/pkg/strconv">package documentation</a>
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for full details.
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</p>
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<table class="codetable" frame="border" summary="strconv renames">
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<colgroup align="left" width="50%"></colgroup>
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<colgroup align="left" width="50%"></colgroup>
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<tr>
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<th align="left">Old call</th>
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<th align="left">New call</th>
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</tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Atob(x)</td> <td>ParseBool(x)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Atof32(x)</td> <td>ParseFloat(x, 32)§</td></tr>
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<tr><td>Atof64(x)</td> <td>ParseFloat(x, 64)</td></tr>
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<tr><td>AtofN(x, n)</td> <td>ParseFloat(x, n)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Atoi(x)</td> <td>Atoi(x)</td></tr>
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<tr><td>Atoi(x)</td> <td>ParseInt(x, 10, 0)§</td></tr>
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<tr><td>Atoi64(x)</td> <td>ParseInt(x, 10, 64)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Atoui(x)</td> <td>ParseUint(x, 10, 0)§</td></tr>
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<tr><td>Atoi64(x)</td> <td>ParseInt(x, 10, 64)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Btoi64(x, b)</td> <td>ParseInt(x, b, 64)</td></tr>
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<tr><td>Btoui64(x, b)</td> <td>ParseUint(x, b, 64)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Btoa(x)</td> <td>FormatBool(x)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Ftoa32(x, f, p)</td> <td>FormatFloat(x, float64(f), p, 32)</td></tr>
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<tr><td>Ftoa64(x, f, p)</td> <td>FormatFloat(x, f, p, 64)</td></tr>
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<tr><td>FtoaN(x, f, p, n)</td> <td>FormatFloat(x, f, p, n)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Itoa(x)</td> <td>Itoa(x)</td></tr>
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<tr><td>Itoa(x)</td> <td>FormatInt(int64(x), 10)</td></tr>
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<tr><td>Itoa64(x)</td> <td>FormatInt(x, 10)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Itob(x, b)</td> <td>FormatInt(int64(x), b)</td></tr>
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<tr><td>Itob64(x, b)</td> <td>FormatInt(x, b)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Uitoa(x)</td> <td>FormatUint(uint64(x), 10)</td></tr>
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<tr><td>Uitoa64(x)</td> <td>FormatUint(x, 10)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Uitob(x, b)</td> <td>FormatUint(uint64(x), b)</td></tr>
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<tr><td>Uitob64(x, b)</td> <td>FormatUint(x, b)</td></tr>
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</table>
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<p>
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<em>Updating</em>:
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Gofix will update almost all code affected by the change.
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<br>
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§ <code>Atoi</code> persists but <code>Atoui</code> and <code>Atof32</code> do not, so
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they may require
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a cast that must be added by hand; gofix will warn about it.
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</p>
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<h3 id="exp">The package tree exp</h3>
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<h3 id="old">The package tree old</h3>
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120
doc/go1.tmpl
120
doc/go1.tmpl
@ -393,6 +393,9 @@ while <a href="#deleted">others</a> have been deleted outright.
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<th align="left">Old path</th>
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<th align="left">New path</th>
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</tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>asn1</td> <td>encoding/asn1</td></tr>
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<tr><td>csv</td> <td>encoding/csv</td></tr>
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<tr><td>gob</td> <td>encoding/gob</td></tr>
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@ -451,14 +454,33 @@ Gofix will update all imports and package renames for packages that
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remain inside the standard repository. Programs that import packages
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that are no longer in the standard repository will need to be edited
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by hand.
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<font color="red">TODO: should warn about deletions.</font>
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<font color="red">TODO: should also handle packages that move to subrepos.</font>
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<br>
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<font color="red">TODO: gofix should warn about deletions.</font>
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<br>
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<font color="red">TODO: gofix should also handle packages that move to subrepos.</font>
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</p>
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<h3 id="errors">The error type</h3>
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<h3 id="errors">The error type and errors package</h3>
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<h3 id="errno">System call errors</h3>
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<p>
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In Go 1, the
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<a href="http://golang.org/pkg/syscall"><code>syscall</code></a>
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package returns an <code>error</code> for system call errors,
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rather than plain integer <code>errno</code> values.
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On Unix, the implementation is done by a
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<a href="http://golang.org/pkg/syscall/#Errno"><code>syscall.Errno</code></a> type
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that satisfies <code>error</code> and replaces the old <code>os.Errno</code>.
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</p>
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<p>
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<em>Updating</em>:
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Gofix will update almost all code affected by the change.
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Regardless, most code should use the <code>os</code> package
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rather than <code>syscall</code> and so will be unaffected.
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</p>
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<h3 id="time">Time</h3>
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<h3 id="html">The html package</h3>
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@ -467,6 +489,98 @@ by hand.
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<h3 id="strconv">The strconv package</h3>
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<p>
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In Go 1, the
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<a href="http://golang.org/pkg/syscall"><code>strconv</code></a>
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package has been significantly reworked to make it more Go-like and less C-like,
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although <code>Atoi</code> lives on (it's similar to
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<code>int(ParseInt(x, 10, 0))</code>, as does
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<code>Itoa(x)</code> (<code>FormatInt(int64(x), 10)</code>).
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There are also new variants of some of the functions that append to byte slices rather than
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return strings, to allow control over allocation.
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</p>
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<p>
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This table summarizes the renamings; see the
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<a href="/pkg/strconv">package documentation</a>
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for full details.
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</p>
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<table class="codetable" frame="border" summary="strconv renames">
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<colgroup align="left" width="50%"></colgroup>
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<colgroup align="left" width="50%"></colgroup>
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<tr>
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<th align="left">Old call</th>
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<th align="left">New call</th>
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</tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Atob(x)</td> <td>ParseBool(x)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Atof32(x)</td> <td>ParseFloat(x, 32)§</td></tr>
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<tr><td>Atof64(x)</td> <td>ParseFloat(x, 64)</td></tr>
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<tr><td>AtofN(x, n)</td> <td>ParseFloat(x, n)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Atoi(x)</td> <td>Atoi(x)</td></tr>
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<tr><td>Atoi(x)</td> <td>ParseInt(x, 10, 0)§</td></tr>
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<tr><td>Atoi64(x)</td> <td>ParseInt(x, 10, 64)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Atoui(x)</td> <td>ParseUint(x, 10, 0)§</td></tr>
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<tr><td>Atoi64(x)</td> <td>ParseInt(x, 10, 64)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Btoi64(x, b)</td> <td>ParseInt(x, b, 64)</td></tr>
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<tr><td>Btoui64(x, b)</td> <td>ParseUint(x, b, 64)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Btoa(x)</td> <td>FormatBool(x)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Ftoa32(x, f, p)</td> <td>FormatFloat(x, float64(f), p, 32)</td></tr>
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<tr><td>Ftoa64(x, f, p)</td> <td>FormatFloat(x, f, p, 64)</td></tr>
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<tr><td>FtoaN(x, f, p, n)</td> <td>FormatFloat(x, f, p, n)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Itoa(x)</td> <td>Itoa(x)</td></tr>
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<tr><td>Itoa(x)</td> <td>FormatInt(int64(x), 10)</td></tr>
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<tr><td>Itoa64(x)</td> <td>FormatInt(x, 10)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Itob(x, b)</td> <td>FormatInt(int64(x), b)</td></tr>
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<tr><td>Itob64(x, b)</td> <td>FormatInt(x, b)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Uitoa(x)</td> <td>FormatUint(uint64(x), 10)</td></tr>
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<tr><td>Uitoa64(x)</td> <td>FormatUint(x, 10)</td></tr>
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<tr>
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<td colspan="2"><hr></td>
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</tr>
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<tr><td>Uitob(x, b)</td> <td>FormatUint(uint64(x), b)</td></tr>
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<tr><td>Uitob64(x, b)</td> <td>FormatUint(x, b)</td></tr>
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</table>
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<p>
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<em>Updating</em>:
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Gofix will update almost all code affected by the change.
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<br>
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§ <code>Atoi</code> persists but <code>Atoui</code> and <code>Atof32</code> do not, so
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they may require
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a cast that must be added by hand; gofix will warn about it.
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</p>
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<h3 id="exp">The package tree exp</h3>
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<h3 id="old">The package tree old</h3>
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