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<h1>misc.c</h1><div class="fragment"><pre class="fragment">00001 <span class="comment">/* </span>
00002 <span class="comment"> * Copyright (c) 2005, 2006 by KoanLogic s.r.l. - All rights reserved.  </span>
00003 <span class="comment"> */</span>
00004 
00005 <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> rcsid[] =
00006     <span class="stringliteral">"$Id: misc.c,v 1.16 2006/01/09 12:38:38 tat Exp $"</span>;
00007 
00008 <span class="preprocessor">#include "libu_conf.h"</span>
00009 <span class="preprocessor">#include &lt;sys/types.h&gt;</span>
00010 <span class="preprocessor">#include &lt;sys/stat.h&gt;</span>
00011 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
00012 <span class="preprocessor">#include &lt;string.h&gt;</span>
00013 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
00014 <span class="preprocessor">#include &lt;time.h&gt;</span>
00015 <span class="preprocessor">#include &lt;errno.h&gt;</span>
00016 <span class="preprocessor">#include &lt;signal.h&gt;</span>
00017 <span class="preprocessor">#include &lt;ctype.h&gt;</span>
00018 <span class="preprocessor">#include &lt;fcntl.h&gt;</span>
00019 <span class="preprocessor">#include &lt;unistd.h&gt;</span>
00020 <span class="preprocessor">#include &lt;dirent.h&gt;</span>
00021 
00022 <span class="preprocessor">#include &lt;u/misc.h&gt;</span>
00023 <span class="preprocessor">#include &lt;u/carpal.h&gt;</span>
00024 <span class="preprocessor">#include &lt;u/memory.h&gt;</span>
00025 
<a name="l00033"></a><a class="code" href="group__misc.html#ga0">00033</a> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="group__misc.html#ga0">u_isblank</a>(<span class="keywordtype">int</span> c)
00034 {
00035     <span class="keywordflow">return</span> c == <span class="charliteral">' '</span> || c == <span class="charliteral">'\t'</span>;
00036 }
00037 
<a name="l00040"></a><a class="code" href="group__misc.html#ga1">00040</a> <span class="keywordtype">void</span> <a class="code" href="group__misc.html#ga1">u_trim</a>(<span class="keywordtype">char</span> *s)
00041 {
00042     <span class="keywordtype">char</span> *p;
00043 
00044     <span class="keywordflow">if</span>(!s)
00045         <span class="keywordflow">return</span>;
00046 
00047     <span class="comment">/* trim trailing blanks */</span>
00048     p = s + strlen(s) -1;
00049     <span class="keywordflow">while</span>(s &lt; p &amp;&amp; <a class="code" href="group__misc.html#ga0">u_isblank</a>(*p))
00050         --p;
00051     p[1] = 0;
00052 
00053     <span class="comment">/* trim leading blanks */</span>
00054     p = s;
00055     <span class="keywordflow">while</span>(*p &amp;&amp; <a class="code" href="group__misc.html#ga0">u_isblank</a>(*p))
00056         ++p;
00057 
00058     <span class="keywordflow">if</span>(p &gt; s)
00059         memmove(s, p, 1 + strlen(p));
00060 }
00061 
<a name="l00065"></a><a class="code" href="group__misc.html#ga2">00065</a> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="group__misc.html#ga2">u_isblank_str</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *ln)
00066 {
00067     <span class="keywordflow">for</span>(; *ln; ++ln)
00068         <span class="keywordflow">if</span>(!<a class="code" href="group__misc.html#ga0">u_isblank</a>(*ln))
00069             <span class="keywordflow">return</span> 0;
00070     <span class="keywordflow">return</span> 1;
00071 }
00072 
<a name="l00076"></a><a class="code" href="group__misc.html#ga3">00076</a> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="group__misc.html#ga3">u_isnl</a>(<span class="keywordtype">int</span> c)
00077 {
00078     <span class="keywordflow">return</span> c == <span class="charliteral">'\n'</span> || c == <span class="charliteral">'\r'</span>;
00079 }
00080 
<a name="l00084"></a><a class="code" href="group__misc.html#ga4">00084</a> <span class="keywordtype">char</span> *<a class="code" href="group__misc.html#ga4">u_strndup</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *s, size_t len)
00085 {
00086     <span class="keywordtype">char</span> *cp;
00087 
00088     <span class="keywordflow">if</span>((cp = (<span class="keywordtype">char</span>*) <a class="code" href="group__alloc.html#ga0">u_malloc</a>(len + 1)) == NULL)
00089         <span class="keywordflow">return</span> NULL;
00090     memcpy(cp, s, len);
00091     cp[len] = 0;
00092     <span class="keywordflow">return</span> cp;
00093 }
00094 
<a name="l00096"></a><a class="code" href="group__misc.html#ga5">00096</a> <span class="keywordtype">char</span> *<a class="code" href="group__misc.html#ga5">u_strdup</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *s)
00097 {
00098     <span class="keywordflow">return</span> <a class="code" href="group__misc.html#ga4">u_strndup</a>(s, strlen(s));
00099 }
00100 
<a name="l00105"></a><a class="code" href="group__misc.html#ga6">00105</a> <span class="keywordtype">int</span> <a class="code" href="group__misc.html#ga6">u_savepid</a> (<span class="keyword">const</span> <span class="keywordtype">char</span> *pf)
00106 {
00107     FILE *pfp;
00108 
00109     dbg_return_if ((pfp = fopen(pf, <span class="stringliteral">"w"</span>)) == NULL, ~0);
00110 
00111     fprintf(pfp, <span class="stringliteral">"%ld\n"</span>, (<span class="keywordtype">long</span>) getpid());
00112     fclose(pfp);
00113 
00114     <span class="keywordflow">return</span> 0;
00115 }
00116 
<a name="l00122"></a><a class="code" href="group__misc.html#ga7">00122</a> <span class="keywordtype">char</span> *<a class="code" href="group__misc.html#ga7">u_sstrncpy</a> (<span class="keywordtype">char</span> *dst, <span class="keyword">const</span> <span class="keywordtype">char</span> *src, size_t size)
00123 {
00124     dst[size] = <span class="charliteral">'\0'</span>;
00125     <span class="keywordflow">return</span> strncpy(dst, src, size);
00126 }
00127 
<a name="l00131"></a><a class="code" href="group__misc.html#ga8">00131</a> <span class="keywordtype">void</span>* <a class="code" href="group__misc.html#ga8">u_memdup</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *src, size_t size)
00132 {
00133     <span class="keywordtype">void</span> *p;
00134 
00135     p = <a class="code" href="group__alloc.html#ga0">u_malloc</a>(size);
00136     <span class="keywordflow">if</span>(p)
00137         memcpy(p, src, size);
00138     <span class="keywordflow">return</span> p;
00139 }
00140 
<a name="l00153"></a><a class="code" href="group__misc.html#ga9">00153</a> <span class="keywordtype">int</span> <a class="code" href="group__misc.html#ga9">u_tokenize</a> (<span class="keywordtype">char</span> *wlist, <span class="keyword">const</span> <span class="keywordtype">char</span> *delim, <span class="keywordtype">char</span> **tokv, size_t tokv_sz)
00154 {
00155     <span class="keywordtype">char</span> **ap;
00156 
00157     dbg_return_if (wlist == NULL, ~0);
00158     dbg_return_if (delim == NULL, ~0);
00159     dbg_return_if (tokv == NULL, ~0);
00160     dbg_return_if (tokv_sz == 0, ~0);
00161 
00162     ap = tokv;
00163 
00164     <span class="keywordflow">for</span> ( ; (*ap = strsep(&amp;wlist, delim)) != NULL; )
00165     {
00166         <span class="comment">/* skip empty field */</span>
00167         <span class="keywordflow">if</span> (**ap == <span class="charliteral">'\0'</span>)
00168             <span class="keywordflow">continue</span>;
00169 
00170         <span class="comment">/* check bounds */</span>
00171         <span class="keywordflow">if</span> (++ap &gt;= &amp;tokv[tokv_sz - 1])
00172             <span class="keywordflow">break</span>;
00173     }
00174 
00175     <span class="comment">/* put an explicit stopper to tokv */</span>
00176     *ap = NULL;
00177 
00178     <span class="keywordflow">return</span> 0;
00179 }
00180 
<a name="l00192"></a><a class="code" href="group__misc.html#ga10">00192</a> <span class="keywordtype">int</span> <a class="code" href="group__misc.html#ga10">u_snprintf</a>(<span class="keywordtype">char</span> *str, size_t size, <span class="keyword">const</span> <span class="keywordtype">char</span> *fmt, ...)
00193 {
00194     va_list ap;
00195     <span class="keywordtype">int</span> wr;
00196 
00197     va_start(ap, fmt);
00198 
00199     wr = vsnprintf(str, size, fmt, ap);
00200 
00201     va_end(ap);
00202 
00203     dbg_err_if(wr &lt; 0 || wr &gt;= (<span class="keywordtype">int</span>)size);
00204 
00205     <span class="keywordflow">return</span> 0;
00206 err:
00207     <span class="keywordflow">return</span> ~0;
00208 }
00209 
<a name="l00223"></a><a class="code" href="group__misc.html#ga11">00223</a> <span class="keywordtype">int</span> <a class="code" href="group__misc.html#ga11">u_path_snprintf</a>(<span class="keywordtype">char</span> *buf, size_t sz, <span class="keywordtype">char</span> sep, <span class="keyword">const</span> <span class="keywordtype">char</span> *fmt, ...)
00224 {
00225     va_list ap;
00226     <span class="keywordtype">int</span> wr, i, len;
00227 
00228     va_start(ap, fmt);
00229 
00230     wr = vsnprintf(buf, sz, fmt, ap);
00231 
00232     va_end(ap);
00233 
00234     dbg_err_if(wr &lt; 0 || wr &gt;= (<span class="keywordtype">int</span>)sz);
00235 
00236     <span class="comment">/* remove multiple consecutive '/' */</span>
00237     <span class="keywordflow">for</span>(len = i = strlen(buf); i &gt; 0; --i)
00238         <span class="keywordflow">if</span>(buf[i] == sep &amp;&amp; buf[i-1] == sep)
00239             memmove(buf + i, buf + i + 1, len--);
00240 
00241     <span class="keywordflow">return</span> 0;
00242 err:
00243     <span class="keywordflow">return</span> ~0;
00244 }
00245 
00246 <span class="keyword">inline</span> <span class="keywordtype">void</span> u_use_unused_args(<span class="keywordtype">char</span> *dummy, ...)
00247 {
00248     dummy = 0;
00249     <span class="keywordflow">return</span>;
00250 }
00251 
<a name="l00253"></a><a class="code" href="group__misc.html#ga13">00253</a> <span class="keywordtype">int</span> <a class="code" href="group__misc.html#ga13">u_data_is_bin</a> (<span class="keywordtype">char</span> *data, size_t sz)
00254 {
00255     size_t i;
00256 
00257     <span class="keywordflow">for</span> (i = 0; i &lt; sz; i++)
00258     {
00259         <span class="keywordflow">if</span> (!isascii(data[i]))
00260             <span class="keywordflow">return</span> 1;
00261     }
00262 
00263     <span class="keywordflow">return</span> 0;
00264 }
00265 
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