This file is indexed.

/usr/include/libqhull/qh-io.htm is in libqhull-dev 2015.2-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
<!-- Do not edit with Front Page, it adds too many spaces -->
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<title>io.c -- input and output operations</title>
</head>

<body>
<!-- Navigation links -->
<p><a name="TOP"><b>Up:</b></a> <a
href="http://www.qhull.org">Home page</a> for Qhull<br>
<b>Up:</b> <a href="../../html/index.htm#TOC">Qhull manual</a>: Table of Contents <br>
<b>Up:</b> <a href="../../html/qh-quick.htm#programs">Programs</a>
&#149; <a href="../../html/qh-quick.htm#options">Options</a>
&#149; <a href="../../html/qh-opto.htm#output">Output</a>
&#149; <a href="../../html/qh-optf.htm#format">Formats</a>
&#149; <a href="../../html/qh-optg.htm#geomview">Geomview</a>
&#149; <a href="../../html/qh-optp.htm#print">Print</a>
&#149; <a href="../../html/qh-optq.htm#qhull">Qhull</a>
&#149; <a href="../../html/qh-optc.htm#prec">Precision</a>
&#149; <a href="../../html/qh-optt.htm#trace">Trace</a>
&#149; <a href="index.htm">Functions</a><br>
<b>Up:</b> <a href="../../html/qh-code.htm#TOC">Qhull code: Table of Contents</a><br>
<b>To:</b> <a href="index.htm">Qhull functions</a>, macros, and data structures<br>
<b>To:</b> <a href="qh-geom.htm">Geom</a> &#149; <a href="qh-globa.htm">Global</a>
&#149; <a href="qh-io.htm#TOC">Io</a> &#149; <a href="qh-mem.htm">Mem</a>
&#149; <a href="qh-merge.htm">Merge</a> &#149; <a href="qh-poly.htm">Poly</a>
&#149; <a href="qh-qhull.htm">Qhull</a> &#149; <a href="qh-set.htm">Set</a>
&#149; <a href="qh-stat.htm">Stat</a> &#149; <a href="qh-user.htm">User</a>
</p>
<hr>

<h2>io.c -- input and output operations</h2>
<blockquote>

<p>Qhull provides a wide range of input
and output options. To organize the code, most output formats use
the same driver: </p>

<pre>
    qh_printbegin( fp, format, facetlist, facets, printall );

    FORALLfacet_( facetlist )
      qh_printafacet( fp, format, facet, printall );

    FOREACHfacet_( facets )
      qh_printafacet( fp, format, facet, printall );

    qh_printend( fp, format );
</pre>

<p>Note the 'printall' flag. It selects whether or not
qh_skipfacet() is tested. </p>

</blockquote>
<p><b>Copyright &copy; 1995-2015 C.B. Barber</b></p>
<hr>
<p><a href="#TOP">&#187;</a> <a href="qh-geom.htm#TOC">Geom</a> <a name="TOC">&#149;</a>
<a href="qh-globa.htm#TOC">Global</a> &#149; <b>Io</b> &#149;
<a href="qh-mem.htm#TOC">Mem</a> &#149; <a href="qh-merge.htm#TOC">Merge</a> &#149;
<a href="qh-poly.htm#TOC">Poly</a> &#149; <a href="qh-qhull.htm#TOC">Qhull</a> &#149;
<a href="qh-set.htm#TOC">Set</a> &#149; <a href="qh-stat.htm#TOC">Stat</a> &#149;
<a href="qh-user.htm#TOC">User</a> </p>

<h3>Index to <a href="io.c">io.c</a> and <a href="io.h">io.h</a></h3>

<ul>
<li><a href="#iconst">io.h constants and types</a> </li>
<li><a href="#ilevel">User level functions</a> </li>
<li><a href="#iprint">Print functions for all output formats</a></li>
<li><a href="#itext">Text output functions</a> </li>
<li><a href="#iutil">Text utility functions</a></li>
<li><a href="#igeom">Geomview output functions</a> </li>
<li><a href="#iview">Geomview utility functions</a></li>
</ul>

<h3><a href="qh-io.htm#TOC">&#187;</a><a name="iconst">io.h constants and types</a></h3>

<ul>
<li><a href="io.h#qh_MAXfirst">qh_MAXfirst</a> maximum length
of first two lines of stdin </li>
<li><a href="io.h#qh_WHITESPACE">qh_WHITESPACE</a> possible
values of white space </li>
<li><a href="io.h#printvridgeT">printvridgeT</a> function to
print results of qh_printvdiagram or qh_eachvoronoi</li>
</ul>

<h3><a href="qh-io.htm#TOC">&#187;</a><a name="ilevel">User level functions</a></h3>

<ul>
<li><a href="io.c#copyfilename">qh_copyfilename</a>
copy filename identified by qh_skipfilename
<li><a href="io.c#eachvoronoi_all">qh_eachvoronoi_all</a>
visit each Voronoi ridge of the Voronoi diagram
<li><a href="io.c#prepare_output">qh_prepare_output</a>
prepare Qhull for output (called by qh_produce_output())
<li><a href="io.c#printhelp_degenerate">qh_printhelp_degenerate</a>
prints descriptive message for precision error </li>
<li><a href="io.c#printhelp_singular">qh_printhelp_singular</a>
print help message for singular data </li>
<li><a href="libqhull.c#printsummary">qh_printsummary</a> print
summary ('s')</li>
<li><a href="io.c#produce_output">qh_produce_output</a>
prints out the result of qhull()</li>
<li><a href="io.c#produce_output">qh_produce_output2</a>
prints out the result of qhull() without calling qh_prepare_output()</li>
<li><a href="io.c#readfeasible">qh_readfeasible</a> read
interior point from remainder and qh fin ('H')</li>
<li><a href="io.c#readpoints">qh_readpoints</a> read input
points </li>
<li><a href="io.c#setfeasible">qh_setfeasible</a> set
interior point from qh feasible_string ('Hn,n,n')</li>
<li><a href="io.c#skipfilename">qh_skipfilename</a>
skip filename in string
</ul>

<h3><a href="qh-io.htm#TOC">&#187;</a><a name="iprint">Print functions for all
output formats</a></h3>

<ul>
<li><a href="io.c#countfacets">qh_countfacets</a> count good
facets for printing and set visitid </li>
<li><a href="io.c#markkeep">qh_markkeep</a> mark good facets
that meet qh.KEEParea ('PAn'), qh.KEEPmerge ('PMn'), and qh.KEEPminArea ('PFn')</li>
<li><a href="io.c#order_vertexneighbors">qh_order_vertexneighbors</a>
order neighbors for a 3-d vertex by adjacency ('i', 'o')</li>
<li><a href="io.c#printafacet">qh_printafacet</a> print facet
in an output format </li>
<li><a href="io.c#printbegin">qh_printbegin</a> print header
for an output format </li>
<li><a href="io.c#printend">qh_printend</a> print trailer for
an output format </li>
<li><a href="user.c#printfacetlist">qh_printfacetlist</a>
print facets in a facetlist</li>
<li><a href="io.c#printfacets">qh_printfacets</a> print
facetlist and/or facet set in an output format </li>
<li><a href="io.c#printneighborhood">qh_printneighborhood</a>
print neighborhood of one or two facets ('Po')</li>
<li><a href="io.c#produce_output">qh_produce_output</a>
print the results of qh_qhull() </li>
<li><a href="io.c#skipfacet">qh_skipfacet</a> True if not
printing this facet ('Pdk:n', 'QVn', 'QGn')</li>
<li><a href="io.c#facetvertices">qh_facetvertices</a> return
vertices in a set of facets ('p')</li>
</ul>

<h3><a href="qh-io.htm#TOC">&#187;</a><a name="itext">Text output functions</a></h3>
<ul>
<li><a href="io.c#eachvoronoi">qh_eachvoronoi</a>
print or visit each Voronoi ridge for an input site of the Voronoi diagram
<li><a href="io.c#printextremes">qh_printextremes</a> print
extreme points by point ID (vertices of convex hull) ('Fx')</li>
<li><a href="io.c#printextremes_2d">qh_printextremes_2d</a> print
2-d extreme points by point ID ('Fx')</li>
<li><a href="io.c#printextremes_d">qh_printextremes_d</a> print
extreme points of input sites for Delaunay triangulations ('Fx')</li>
<li><a href="io.c#printfacet">qh_printfacet</a> print all
fields of a facet ('f')</li>
<li><a href="io.c#printfacet2math">qh_printfacet2math</a> print
2-d Maple or Mathematica output for a facet ('FM' or 'm')</li>
<li><a href="io.c#printfacet3math">qh_printfacet3math</a>
print 3-d Maple or Mathematica facet ('FM' or 'm')</li>
<li><a href="io.c#printfacet3vertex">qh_printfacet3vertex</a>
print vertices for a 3-d facet ('i', 'o')</li>
<li><a href="io.c#printfacetheader">qh_printfacetheader</a>
prints header fields of a facet ('f')</li>
<li><a href="io.c#printfacetNvertex_nonsimplicial">qh_printfacetNvertex_nonsimplicial</a>
print vertices for an N-d non-simplicial facet ('i', 'Ft')</li>
<li><a href="io.c#printfacetNvertex_simplicial">qh_printfacetNvertex_simplicial</a>
print vertices for an N-d simplicial facet ('i', 'o', 'Ft')</li>
<li><a href="io.c#printfacetridges">qh_printfacetridges</a>
prints ridges of a facet ('f')</li>
<li><a href="io.c#printpoints_out">qh_printpoints_out</a> prints
vertices for facets by their point coordinates ('p')</li>
<li><a href="io.c#printridge">qh_printridge</a> print all
fields for a ridge ('f')</li>
<li><a href="io.c#printvdiagram">qh_printvdiagram</a> print
voronoi diagram as Voronoi vertices for each input pair</li>
<li><a href="io.c#printvertex">qh_printvertex</a> print all
fields for a vertex ('f')</li>
<li><a href="io.c#printvertexlist">qh_printvertexlist</a>
print vertices used by a list or set of facets ('f')</li>
<li><a href="io.c#printvertices">qh_printvertices</a> print a
set of vertices ('f')</li>
<li><a href="io.c#printvneighbors">qh_printvneighbors</a>
print vertex neighbors of vertices ('FN')</li>
<li><a href="io.c#printvoronoi">qh_printvoronoi</a> print
voronoi diagram in 'o' or 'G' format</li>
</ul>

<h3><a href="qh-io.htm#TOC">&#187;</a><a name="iutil">Text utility functions</a></h3>
<ul>
<li><a href="io.c#dfacet">dfacet</a> print facet by ID </li>
<li><a href="io.c#dvertex">dvertex</a> print vertex by ID </li>
<li><a href="io.c#compare_facetarea">qh_compare_facetarea</a>
used by qsort() to order facets by area </li>
<li><a href="io.c#compare_facetmerge">qh_compare_facetmerge</a>
used by qsort() to order facets by number of merges </li>
<li><a href="io.c#compare_facetvisit">qh_compare_facetvisit</a>
used by qsort() to order facets by visit ID or ID </li>
<li><a href="io.c#compare_vertexpoint">qh_compare_vertexpoint</a>
used by qsort() to order vertices by point ID </li>
<li><a href="io.c#detvnorm">qh_detvnorm</a> determine normal for Voronoi ridge </li>
<li><a href="io.c#detvridge">qh_detvridge</a> determine Voronoi
ridge for an input site
<li><a href="io.c#detvridge3">qh_detvridge3</a> determine 3-d Voronoi
ridge for an input site
<li><a href="io.c#facet2point">qh_facet2point</a> return two
projected temporary vertices for a 2-d facet ('m', 'G')</li>
<li><a href="io.c#markvoronoi">qh_markvoronoi</a> mark Voronoi
vertices for printing
<li><a href="io.c#printcenter">qh_printcenter</a> print
facet-&gt;center as centrum or Voronoi center ('Ft', 'v p', 'FC', 'f') </li>
<li><a href="io.c#printpoint">qh_printpoint</a>, qh_printpointid, print
coordinates of a point ('p', 'o', 'Fp', 'G', 'f')</li>
<li><a href="io.c#printpoint3">qh_printpoint3</a> prints 2-d,
3-d, or 4-d point as 3-d coordinates ('G')</li>
<li><a href="io.c#printvdiagram2">qh_printvdiagram2</a> print
voronoi diagram for each ridge of each vertex from qh_markvoronoi</li>
<li><a href="io.c#printvnorm">qh_printvnorm</a> print
separating plane of the Voronoi diagram for a pair of input sites</li>
<li><a href="io.c#printvridge">qh_printvridge</a> print
ridge of the Voronoi diagram for a pair of input sites</li>
<li><a href="io.c#projectdim3">qh_projectdim3</a> project 2-d
3-d or 4-d point to a 3-d point ('G')</li>
</ul>

<h3><a href="qh-io.htm#TOC">&#187;</a><a name="igeom">Geomview output functions</a></h3>
<ul>
<li><a href="io.c#printfacet2geom">qh_printfacet2geom</a>
print facet as a 2-d VECT object </li>
<li><a href="io.c#printfacet2geom_points">qh_printfacet2geom_points</a>
print points as a 2-d VECT object with offset </li>
<li><a href="io.c#printfacet3geom_nonsimplicial">qh_printfacet3geom_nonsimplicial</a>
print Geomview OFF for a 3-d nonsimplicial facet. </li>
<li><a href="io.c#printfacet3geom_points">qh_printfacet3geom_points</a>
prints a 3-d facet as OFF Geomview object. </li>
<li><a href="io.c#printfacet3geom_simplicial">qh_printfacet3geom_simplicial</a>
print Geomview OFF for a 3-d simplicial facet. </li>
<li><a href="io.c#printfacet4geom_nonsimplicial">qh_printfacet4geom_nonsimplicial</a>
print Geomview 4OFF file for a 4d nonsimplicial facet </li>
<li><a href="io.c#printfacet4geom_simplicial">qh_printfacet4geom_simplicial</a>
print Geomview 4OFF file for a 4d simplicial facet </li>
<li><a href="io.c#printhyperplaneintersection">qh_printhyperplaneintersection</a>
print hyperplane intersection as OFF or 4OFF </li>
<li><a href="io.c#printvoronoi">qh_printvoronoi</a> print
voronoi diagram in 'o' or 'G' format</li>
</ul>
<h3><a href="qh-io.htm#TOC">&#187;</a><a name="iview">Geomview utility functions</a></h3>
<ul>
<li><a href="io.c#geomplanes">qh_geomplanes</a>
    return outer and inner planes for Geomview</li>
<li><a href="io.c#printcentrum">qh_printcentrum</a> print
centrum for a facet in OOGL format </li>
<li><a href="io.c#printend4geom">qh_printend4geom</a> helper
function for qh_printbegin/printend </li>
<li><a href="io.c#printhyperplaneintersection">qh_printhyperplaneintersection</a>
print Geomview OFF or 4OFF for the intersection of two
hyperplanes in 3-d or 4-d </li>
<li><a href="io.c#printline3geom">qh_printline3geom</a> prints a
line as a VECT </li>
<li><a href="io.c#printpointvect">qh_printpointvect</a>
prints a 2-d or 3-d point as 3-d VECT's </li>
<li><a href="io.c#printpointvect2">qh_printpointvect2</a>
prints a 2-d or 3-d point as 2 3-d VECT's </li>
<li><a href="io.c#printspheres">qh_printspheres</a> prints 3-d
vertices as OFF spheres </li>
</ul>
<p>
<p><!-- Navigation links --> </p>
<hr>
<p><b>Up:</b>
<a href="http://www.qhull.org">Home page for
Qhull</a> <br>
<b>Up:</b> <a href="../../html/index.htm#TOC">Qhull manual: Table of Contents</a> <br>
<b>Up:</b> <a href="../../html/qh-quick.htm#programs">Programs</a>
&#149; <a href="../../html/qh-quick.htm#options">Options</a>
&#149; <a href="../../html/qh-opto.htm#output">Output</a>
&#149; <a href="../../html/qh-optf.htm#format">Formats</a>
&#149; <a href="../../html/qh-optg.htm#geomview">Geomview</a>
&#149; <a href="../../html/qh-optp.htm#print">Print</a>
&#149; <a href="../../html/qh-optq.htm#qhull">Qhull</a>
&#149; <a href="../../html/qh-optc.htm#prec">Precision</a>
&#149; <a href="../../html/qh-optt.htm#trace">Trace</a>
&#149; <a href="index.htm">Functions</a><br>
<b>Up:</b> <a href="../../html/qh-code.htm#TOC">Qhull code: Table of Contents</a> <br>
<b>To:</b> <a href="index.htm">Qhull functions</a>, macros, and data structures<br>
<b>To:</b> <a href="qh-geom.htm">Geom</a> &#149;
<a href="qh-globa.htm">Global</a> &#149; <a href="qh-io.htm">Io</a>
&#149; <a href="qh-mem.htm">Mem</a> &#149; <a href="qh-merge.htm">Merge</a>
&#149; <a href="qh-poly.htm">Poly</a> &#149; <a href="qh-qhull.htm#TOC">Qhull</a>
&#149; <a href="qh-set.htm">Set</a> &#149; <a href="qh-stat.htm">Stat</a>
&#149; <a href="qh-user.htm">User</a><br>
</p>
<p><!-- GC common information --> </p>
<hr>
<p><a href="http://www.geom.uiuc.edu/"><img
src="../../html/qh--geom.gif" align="middle" width="40" height="40"></a><i>The
Geometry Center Home Page </i></p>
<p>Comments to: <a href=mailto:qhull@qhull.org>qhull@qhull.org</a>
</a><br>
Created: May 2, 1997 --- <!-- hhmts start --> Last modified: see top <!-- hhmts end --> </p>
</body>
</html>