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chromium / external / gitster / git-htmldocs / c14e6ad9a230ad90c84b7f620d87fbe49a2d0342 / . / technical / api-tree-walking.html
blob: 2ddd698ef73978b825f621a967c809fb62c827c2 [file] [log] [blame]
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
2 "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
3<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
4<head>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]5<meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]6<meta name="generator" content="AsciiDoc 8.6.9" />
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]7<title>tree walking API</title>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]8<style type="text/css">
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]9/* Shared CSS for AsciiDoc xhtml11 and html5 backends */
10
11/* Default font. */
12body {
13 font-family: Georgia,serif;
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16/* Title font. */
17h1, h2, h3, h4, h5, h6,
18div.title, caption.title,
19thead, p.table.header,
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21#author, #revnumber, #revdate, #revremark,
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23 font-family: Arial,Helvetica,sans-serif;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]24}
25
26body {
27 margin: 1em 5% 1em 5%;
28}
29
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]30a {
31 color: blue;
32 text-decoration: underline;
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34a:visited {
35 color: fuchsia;
36}
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]37
38em {
39 font-style: italic;
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]40 color: navy;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]41}
42
43strong {
44 font-weight: bold;
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]45 color: #083194;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]46}
47
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]48h1, h2, h3, h4, h5, h6 {
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]50 margin-top: 1.2em;
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54
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]55h1, h2, h3 {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]56 border-bottom: 2px solid silver;
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]59 padding-top: 0.5em;
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Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]61h3 {
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]67h5 {
68 font-size: 1.0em;
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]70
71div.sectionbody {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]72 margin-left: 0;
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]84ul, ol, li > p {
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]87ul > li { color: #aaa; }
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]89
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]90.monospaced, code, pre {
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]94 padding: 0;
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Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]97pre {
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]100
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]101#author {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]102 color: #527bbd;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]103 font-weight: bold;
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]104 font-size: 1.1em;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]105}
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]106#email {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]107}
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]108#revnumber, #revdate, #revremark {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]109}
110
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]111#footer {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]112 font-size: small;
113 border-top: 2px solid silver;
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]117#footer-text {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]118 float: left;
119 padding-bottom: 0.5em;
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]121#footer-badges {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]122 float: right;
123 padding-bottom: 0.5em;
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125
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]126#preamble {
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]127 margin-top: 1.5em;
128 margin-bottom: 1.5em;
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]130div.imageblock, div.exampleblock, div.verseblock,
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]131div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock,
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Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]133 margin-top: 1.0em;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]134 margin-bottom: 1.5em;
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Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]137 margin-top: 2.0em;
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]141}
142
143div.content { /* Block element content. */
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147/* Block element titles. */
148div.title, caption.title {
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]149 color: #527bbd;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]150 font-weight: bold;
151 text-align: left;
152 margin-top: 1.0em;
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155div.title + * {
156 margin-top: 0;
157}
158
159td div.title:first-child {
160 margin-top: 0.0em;
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162div.content div.title:first-child {
163 margin-top: 0.0em;
164}
165div.content + div.title {
166 margin-top: 0.0em;
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168
169div.sidebarblock > div.content {
170 background: #ffffee;
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]171 border: 1px solid #dddddd;
172 border-left: 4px solid #f0f0f0;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]173 padding: 0.5em;
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175
176div.listingblock > div.content {
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]177 border: 1px solid #dddddd;
178 border-left: 5px solid #f0f0f0;
179 background: #f8f8f8;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]180 padding: 0.5em;
181}
182
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]183div.quoteblock, div.verseblock {
184 padding-left: 1.0em;
185 margin-left: 1.0em;
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]186 margin-right: 10%;
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]187 border-left: 5px solid #f0f0f0;
188 color: #888;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]189}
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]190
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]191div.quoteblock > div.attribution {
192 padding-top: 0.5em;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]193 text-align: right;
194}
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]195
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]196div.verseblock > pre.content {
197 font-family: inherit;
198 font-size: inherit;
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]199}
200div.verseblock > div.attribution {
201 padding-top: 0.75em;
202 text-align: left;
203}
204/* DEPRECATED: Pre version 8.2.7 verse style literal block. */
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]205div.verseblock + div.attribution {
206 text-align: left;
207}
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]208
209div.admonitionblock .icon {
210 vertical-align: top;
211 font-size: 1.1em;
212 font-weight: bold;
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214 color: #527bbd;
215 padding-right: 0.5em;
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Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]219 border-left: 3px solid #dddddd;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]220}
221
222div.exampleblock > div.content {
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]223 border-left: 3px solid #dddddd;
224 padding-left: 0.5em;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]225}
226
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]227div.imageblock div.content { padding-left: 0; }
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]228span.image img { border-style: none; vertical-align: text-bottom; }
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]229a.image:visited { color: white; }
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]230
231dl {
232 margin-top: 0.8em;
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235dt {
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]238 font-style: normal;
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]240}
241dd > *:first-child {
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]242 margin-top: 0.1em;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]243}
244
245ul, ol {
246 list-style-position: outside;
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]248ol.arabic {
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]252 list-style-type: lower-alpha;
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Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]254ol.upperalpha {
255 list-style-type: upper-alpha;
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258 list-style-type: lower-roman;
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260ol.upperroman {
261 list-style-type: upper-roman;
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263
264div.compact ul, div.compact ol,
265div.compact p, div.compact p,
266div.compact div, div.compact div {
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]270
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]271tfoot {
272 font-weight: bold;
273}
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]274td > div.verse {
275 white-space: pre;
276}
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]277
278div.hdlist {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]279 margin-top: 0.8em;
280 margin-bottom: 0.8em;
281}
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]282div.hdlist tr {
283 padding-bottom: 15px;
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]284}
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]285dt.hdlist1.strong, td.hdlist1.strong {
286 font-weight: bold;
287}
288td.hdlist1 {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]289 vertical-align: top;
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]290 font-style: normal;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]291 padding-right: 0.8em;
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]292 color: navy;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]293}
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]294td.hdlist2 {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]295 vertical-align: top;
296}
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]297div.hdlist.compact tr {
298 margin: 0;
299 padding-bottom: 0;
300}
301
302.comment {
303 background: yellow;
304}
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]305
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]306.footnote, .footnoteref {
307 font-size: 0.8em;
308}
309
310span.footnote, span.footnoteref {
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312}
313
314#footnotes {
315 margin: 20px 0 20px 0;
316 padding: 7px 0 0 0;
317}
318
319#footnotes div.footnote {
320 margin: 0 0 5px 0;
321}
322
323#footnotes hr {
324 border: none;
325 border-top: 1px solid silver;
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329 width: 20%;
330 min-width: 100px;
331}
332
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]333div.colist td {
334 padding-right: 0.5em;
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336 vertical-align: top;
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338div.colist td img {
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]340}
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]341
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]342@media print {
343 #footer-badges { display: none; }
344}
345
346#toc {
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]347 margin-bottom: 2.5em;
348}
349
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]350#toctitle {
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]351 color: #527bbd;
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]352 font-size: 1.1em;
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354 margin-top: 1.0em;
355 margin-bottom: 0.1em;
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357
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]358div.toclevel0, div.toclevel1, div.toclevel2, div.toclevel3, div.toclevel4 {
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]359 margin-top: 0;
360 margin-bottom: 0;
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366div.toclevel3 {
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372 font-size: 0.9em;
373}
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]374
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]375span.aqua { color: aqua; }
376span.black { color: black; }
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378span.fuchsia { color: fuchsia; }
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380span.green { color: green; }
381span.lime { color: lime; }
382span.maroon { color: maroon; }
383span.navy { color: navy; }
384span.olive { color: olive; }
385span.purple { color: purple; }
386span.red { color: red; }
387span.silver { color: silver; }
388span.teal { color: teal; }
389span.white { color: white; }
390span.yellow { color: yellow; }
391
392span.aqua-background { background: aqua; }
393span.black-background { background: black; }
394span.blue-background { background: blue; }
395span.fuchsia-background { background: fuchsia; }
396span.gray-background { background: gray; }
397span.green-background { background: green; }
398span.lime-background { background: lime; }
399span.maroon-background { background: maroon; }
400span.navy-background { background: navy; }
401span.olive-background { background: olive; }
402span.purple-background { background: purple; }
403span.red-background { background: red; }
404span.silver-background { background: silver; }
405span.teal-background { background: teal; }
406span.white-background { background: white; }
407span.yellow-background { background: yellow; }
408
409span.big { font-size: 2em; }
410span.small { font-size: 0.6em; }
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412span.underline { text-decoration: underline; }
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414span.line-through { text-decoration: line-through; }
415
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]416div.unbreakable { page-break-inside: avoid; }
417
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]418
419/*
420 * xhtml11 specific
421 *
422 * */
423
424div.tableblock {
425 margin-top: 1.0em;
426 margin-bottom: 1.5em;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]427}
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]428div.tableblock > table {
429 border: 3px solid #527bbd;
430}
431thead, p.table.header {
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]432 font-weight: bold;
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]433 color: #527bbd;
434}
435p.table {
436 margin-top: 0;
437}
438/* Because the table frame attribute is overriden by CSS in most browsers. */
439div.tableblock > table[frame="void"] {
440 border-style: none;
441}
442div.tableblock > table[frame="hsides"] {
443 border-left-style: none;
444 border-right-style: none;
445}
446div.tableblock > table[frame="vsides"] {
447 border-top-style: none;
448 border-bottom-style: none;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]449}
450
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]451
452/*
453 * html5 specific
454 *
455 * */
456
457table.tableblock {
458 margin-top: 1.0em;
459 margin-bottom: 1.5em;
460}
461thead, p.tableblock.header {
462 font-weight: bold;
463 color: #527bbd;
464}
465p.tableblock {
466 margin-top: 0;
467}
468table.tableblock {
469 border-width: 3px;
470 border-spacing: 0px;
471 border-style: solid;
472 border-color: #527bbd;
473 border-collapse: collapse;
474}
475th.tableblock, td.tableblock {
476 border-width: 1px;
477 padding: 4px;
478 border-style: solid;
479 border-color: #527bbd;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]480}
481
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]482table.tableblock.frame-topbot {
483 border-left-style: hidden;
484 border-right-style: hidden;
485}
486table.tableblock.frame-sides {
487 border-top-style: hidden;
488 border-bottom-style: hidden;
489}
490table.tableblock.frame-none {
491 border-style: hidden;
492}
493
494th.tableblock.halign-left, td.tableblock.halign-left {
495 text-align: left;
496}
497th.tableblock.halign-center, td.tableblock.halign-center {
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500th.tableblock.halign-right, td.tableblock.halign-right {
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]501 text-align: right;
502}
503
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]504th.tableblock.valign-top, td.tableblock.valign-top {
505 vertical-align: top;
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]506}
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]507th.tableblock.valign-middle, td.tableblock.valign-middle {
508 vertical-align: middle;
509}
510th.tableblock.valign-bottom, td.tableblock.valign-bottom {
511 vertical-align: bottom;
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]512}
513
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]514
515/*
516 * manpage specific
517 *
518 * */
519
520body.manpage h1 {
521 padding-top: 0.5em;
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]602 if (!toc) {
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Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]621 var entries = tocEntries(document.getElementById("content"), toclevels);
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Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]705},
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Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]733</head>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]734<body class="article">
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]735<div id="header">
736<h1>tree walking API</h1>
737</div>
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]738<div id="content">
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]739<div id="preamble">
740<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]741<div class="paragraph"><p>The tree walking API is used to traverse and inspect trees.</p></div>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]742</div>
743</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]744<div class="sect1">
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]745<h2 id="_data_structures">Data Structures</h2>
746<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]747<div class="dlist"><dl>
748<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]749<code>struct name_entry</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]750</dt>
751<dd>
752<p>
753 An entry in a tree. Each entry has a sha1 identifier, pathname, and
754 mode.
755</p>
756</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]757<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]758<code>struct tree_desc</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]759</dt>
760<dd>
761<p>
762 A semi-opaque data structure used to maintain the current state of the
763 walk.
764</p>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]765<div class="ulist"><ul>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]766<li>
767<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]768<code>buffer</code> is a pointer into the memory representation of the tree. It always
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]769points at the current entry being visited.
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]770</p>
771</li>
772<li>
773<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]774<code>size</code> counts the number of bytes left in the <code>buffer</code>.
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]775</p>
776</li>
777<li>
778<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]779<code>entry</code> points to the current entry being visited.
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]780</p>
781</li>
Junio C Hamano4604fe52008-09-19 06:37:10[diff] [blame]782</ul></div>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]783</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]784<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]785<code>struct traverse_info</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]786</dt>
787<dd>
788<p>
789 A structure used to maintain the state of a traversal.
790</p>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]791<div class="ulist"><ul>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]792<li>
793<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]794<code>prev</code> points to the traverse_info which was used to descend into the
795current tree. If this is the top-level tree <code>prev</code> will point to
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]796a dummy traverse_info.
797</p>
798</li>
799<li>
800<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]801<code>name</code> is the entry for the current tree (if the tree is a subtree).
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]802</p>
803</li>
804<li>
805<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]806<code>pathlen</code> is the length of the full path for the current tree.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]807</p>
808</li>
809<li>
810<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]811<code>conflicts</code> can be used by callbacks to maintain directory-file conflicts.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]812</p>
813</li>
814<li>
815<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]816<code>fn</code> is a callback called for each entry in the tree. See Traversing for more
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]817information.
818</p>
819</li>
820<li>
821<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]822<code>data</code> can be anything the <code>fn</code> callback would want to use.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]823</p>
824</li>
Junio C Hamano53ba6d02010-08-22 07:25:12[diff] [blame]825<li>
826<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]827<code>show_all_errors</code> tells whether to stop at the first error or not.
Junio C Hamano53ba6d02010-08-22 07:25:12[diff] [blame]828</p>
829</li>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]830</ul></div>
831</dd>
832</dl></div>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]833</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]834</div>
835<div class="sect1">
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]836<h2 id="_initializing">Initializing</h2>
837<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]838<div class="dlist"><dl>
839<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]840<code>init_tree_desc</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]841</dt>
842<dd>
843<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]844 Initialize a <code>tree_desc</code> and decode its first entry. The buffer and
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]845 size parameters are assumed to be the same as the buffer and size
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]846 members of <code>struct tree</code>.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]847</p>
848</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]849<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]850<code>fill_tree_descriptor</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]851</dt>
852<dd>
853<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]854 Initialize a <code>tree_desc</code> and decode its first entry given the sha1 of
855 a tree. Returns the <code>buffer</code> member if the sha1 is a valid tree
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]856 identifier and NULL otherwise.
857</p>
858</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]859<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]860<code>setup_traverse_info</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]861</dt>
862<dd>
863<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]864 Initialize a <code>traverse_info</code> given the pathname of the tree to start
865 traversing from. The <code>base</code> argument is assumed to be the <code>path</code>
866 member of the <code>name_entry</code> being recursed into unless the tree is a
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]867 top-level tree in which case the empty string ("") is used.
868</p>
869</dd>
870</dl></div>
871</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]872</div>
873<div class="sect1">
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]874<h2 id="_walking">Walking</h2>
875<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]876<div class="dlist"><dl>
877<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]878<code>tree_entry</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]879</dt>
880<dd>
881<p>
882 Visit the next entry in a tree. Returns 1 when there are more entries
883 left to visit and 0 when all entries have been visited. This is
884 commonly used in the test of a while loop.
885</p>
886</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]887<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]888<code>tree_entry_len</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]889</dt>
890<dd>
891<p>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]892 Calculate the length of a tree entry&#8217;s pathname. This utilizes the
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]893 memory structure of a tree entry to avoid the overhead of using a
894 generic strlen().
895</p>
896</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]897<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]898<code>update_tree_entry</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]899</dt>
900<dd>
901<p>
902 Walk to the next entry in a tree. This is commonly used in conjunction
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]903 with <code>tree_entry_extract</code> to inspect the current entry.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]904</p>
905</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]906<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]907<code>tree_entry_extract</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]908</dt>
909<dd>
910<p>
911 Decode the entry currently being visited (the one pointed to by
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]912 <code>tree_desc's</code> <code>entry</code> member) and return the sha1 of the entry. The
913 <code>pathp</code> and <code>modep</code> arguments are set to the entry&#8217;s pathname and mode
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]914 respectively.
915</p>
916</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]917<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]918<code>get_tree_entry</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]919</dt>
920<dd>
921<p>
922 Find an entry in a tree given a pathname and the sha1 of a tree to
923 search. Returns 0 if the entry is found and -1 otherwise. The third
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]924 and fourth parameters are set to the entry&#8217;s sha1 and mode
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]925 respectively.
926</p>
927</dd>
928</dl></div>
929</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]930</div>
931<div class="sect1">
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]932<h2 id="_traversing">Traversing</h2>
933<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]934<div class="dlist"><dl>
935<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]936<code>traverse_trees</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]937</dt>
938<dd>
939<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]940 Traverse <code>n</code> number of trees in parallel. The <code>fn</code> callback member of
941 <code>traverse_info</code> is called once for each tree entry.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]942</p>
943</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]944<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]945<code>traverse_callback_t</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]946</dt>
947<dd>
948<p>
949 The arguments passed to the traverse callback are as follows:
950</p>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]951<div class="ulist"><ul>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]952<li>
953<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]954<code>n</code> counts the number of trees being traversed.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]955</p>
956</li>
957<li>
958<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]959<code>mask</code> has its nth bit set if something exists in the nth entry.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]960</p>
961</li>
962<li>
963<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]964<code>dirmask</code> has its nth bit set if the nth tree&#8217;s entry is a directory.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]965</p>
966</li>
967<li>
968<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]969<code>entry</code> is an array of size <code>n</code> where the nth entry is from the nth tree.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]970</p>
971</li>
972<li>
973<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]974<code>info</code> maintains the state of the traversal.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]975</p>
976</li>
977</ul></div>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]978<div class="paragraph"><p>Returning a negative value will terminate the traversal. Otherwise the
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]979return value is treated as an update mask. If the nth bit is set the nth tree
980will be updated and if the bit is not set the nth tree entry will be the
981same in the next callback invocation.</p></div>
982</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]983<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]984<code>make_traverse_path</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]985</dt>
986<dd>
987<p>
988 Generate the full pathname of a tree entry based from the root of the
989 traversal. For example, if the traversal has recursed into another
990 tree named "bar" the pathname of an entry "baz" in the "bar"
991 tree would be "bar/baz".
992</p>
993</dd>
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]994<dt class="hdlist1">
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]995<code>traverse_path_len</code>
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]996</dt>
997<dd>
998<p>
Junio C Hamanoc14e6ad2014-10-31 20:25:53[diff] [blame^]999 Calculate the length of a pathname returned by <code>make_traverse_path</code>.
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]1000 This utilizes the memory structure of a tree entry to avoid the
1001 overhead of using a generic strlen().
1002</p>
1003</dd>
1004</dl></div>
1005</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]1006</div>
1007<div class="sect1">
Junio C Hamanofd9274d2009-08-05 21:21:39[diff] [blame]1008<h2 id="_authors">Authors</h2>
1009<div class="sectionbody">
Junio C Hamano103b5722011-01-31 05:03:45[diff] [blame]1010<div class="paragraph"><p>Written by Junio C Hamano &lt;<a href="mailto:gitster@pobox.com">gitster@pobox.com</a>&gt; and Linus Torvalds
1011&lt;<a href="mailto:torvalds@linux-foundation.org">torvalds@linux-foundation.org</a>&gt;</p></div>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]1012</div>
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]1013</div>
Junio C Hamano9d971152012-12-19 00:43:11[diff] [blame]1014</div>
Junio C Hamano7bd050f2011-09-22 06:32:22[diff] [blame]1015<div id="footnotes"><hr /></div>
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]1016<div id="footer">
1017<div id="footer-text">
Junio C Hamano683a8612013-08-23 20:50:09[diff] [blame]1018Last updated 2013-08-20 08:40:27 PDT
Junio C Hamano3dac5042007-12-15 08:40:54[diff] [blame]1019</div>
1020</div>
1021</body>
1022</html>