summaryrefslogtreecommitdiff
path: root/devdocs/c/variadic.html
diff options
context:
space:
mode:
authorCraig Jennings <c@cjennings.net>2025-08-14 22:58:58 -0500
committerCraig Jennings <c@cjennings.net>2025-08-14 22:58:58 -0500
commit82ba818ff456bcd6d56a06226e3f27e98fbb55c3 (patch)
tree158cfc17b2f644a10f063cb546752cfaae12c97f /devdocs/c/variadic.html
parent9278ddd4ea1a8b1a4c1edaa8894516e3f48d245b (diff)
downloaddotemacs-82ba818ff456bcd6d56a06226e3f27e98fbb55c3.tar.gz
dotemacs-82ba818ff456bcd6d56a06226e3f27e98fbb55c3.zip
removing all downloaded devdocs files
Diffstat (limited to 'devdocs/c/variadic.html')
-rw-r--r--devdocs/c/variadic.html62
1 files changed, 0 insertions, 62 deletions
diff --git a/devdocs/c/variadic.html b/devdocs/c/variadic.html
deleted file mode 100644
index a824c453..00000000
--- a/devdocs/c/variadic.html
+++ /dev/null
@@ -1,62 +0,0 @@
- <h1 id="firstHeading" class="firstHeading">Variadic functions</h1> <p>Variadic functions are functions (e.g. <code><a href="io/fprintf" title="c/io/fprintf">printf</a></code>) which take a variable number of arguments.</p>
-<p>The declaration of a variadic function uses an ellipsis as the last parameter, e.g. <code><span class="kw4">int</span> <a href="http://en.cppreference.com/w/c/io/fprintf"><span class="kw851">printf</span></a><span class="br0">(</span><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> format, ...<span class="br0">)</span><span class="sy4">;</span></code>. See <a href="language/variadic" title="c/language/variadic">variadic arguments</a> for additional detail on the syntax and automatic argument conversions.</p>
-<p>Accessing the variadic arguments from the function body uses the following library facilities:</p>
-<table class="t-dsc-begin"> <tr> <td colspan="2"> <h5 id="Macros"> Macros </h5> </td>
-</tr> <tr class="t-dsc-header"> <th colspan="2"> Defined in header <code>&lt;stdarg.h&gt;</code> </th>
-</tr> <tr class="t-dsc"> <td> <div><a href="variadic/va_start" title="c/variadic/va start"> <span class="t-lines"><span>va_start</span></span></a></div> </td> <td> enables access to variadic function arguments <br> <span class="t-mark">(function macro)</span> </td>
-</tr> <tr class="t-dsc"> <td> <div><a href="variadic/va_arg" title="c/variadic/va arg"> <span class="t-lines"><span>va_arg</span></span></a></div> </td> <td> accesses the next variadic function argument <br> <span class="t-mark">(function macro)</span> </td>
-</tr> <tr class="t-dsc"> <td> <div><a href="variadic/va_copy" title="c/variadic/va copy"> <span class="t-lines"><span>va_copy</span></span></a></div>
-<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div> </td> <td> makes a copy of the variadic function arguments <br> <span class="t-mark">(function macro)</span> </td>
-</tr> <tr class="t-dsc"> <td> <div><a href="variadic/va_end" title="c/variadic/va end"> <span class="t-lines"><span>va_end</span></span></a></div> </td> <td> ends traversal of the variadic function arguments <br> <span class="t-mark">(function macro)</span> </td>
-</tr> <tr> <td colspan="2"> <h5 id="Type"> Type </h5> </td>
-</tr> <tr class="t-dsc"> <td> <div><a href="variadic/va_list" title="c/variadic/va list"> <span class="t-lines"><span>va_list</span></span></a></div> </td> <td> holds the information needed by va_start, va_arg, va_end, and va_copy <br> <span class="t-mark">(typedef)</span> </td>
-</tr> </table> <h3 id="Example"> Example</h3> <div class="t-example">
-<p>Print values of different types.</p>
-<div class="c source-c"><pre data-language="c">#include &lt;stdio.h&gt;
-#include &lt;stdarg.h&gt;
-
-void simple_printf(const char* fmt, ...)
-{
- va_list args;
- va_start(args, fmt);
-
- while (*fmt != '\0') {
- if (*fmt == 'd') {
- int i = va_arg(args, int);
- printf("%d\n", i);
- } else if (*fmt == 'c') {
- // A 'char' variable will be promoted to 'int'
- // A character literal in C is already 'int' by itself
- int c = va_arg(args, int);
- printf("%c\n", c);
- } else if (*fmt == 'f') {
- double d = va_arg(args, double);
- printf("%f\n", d);
- }
- ++fmt;
- }
-
- va_end(args);
-}
-
-int main(void)
-{
- simple_printf("dcff", 3, 'a', 1.999, 42.5);
-}</pre></div> <p>Output:</p>
-<div class="text source-text"><pre data-language="c">3
-a
-1.999000
-42.50000</pre></div> </div> <h3 id="References"> References</h3> <ul>
-<li> C11 standard (ISO/IEC 9899:2011): </li>
-<ul><li> 7.16 Variable arguments &lt;stdarg.h&gt; (p: 269-272) </li></ul>
-<li> C99 standard (ISO/IEC 9899:1999): </li>
-<ul><li> 7.15 Variable arguments &lt;stdarg.h&gt; (p: 249-252) </li></ul>
-<li> C89/C90 standard (ISO/IEC 9899:1990): </li>
-<ul><li> 4.8 VARIABLE ARGUMENTS &lt;stdarg.h&gt; </li></ul>
-</ul> <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/utility/variadic" title="cpp/utility/variadic">C++ documentation</a></span> for <span class=""><span>Variadic functions</span></span> </td>
-</tr> </table> <div class="_attribution">
- <p class="_attribution-p">
- &copy; cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br>
- <a href="https://en.cppreference.com/w/c/variadic" class="_attribution-link">https://en.cppreference.com/w/c/variadic</a>
- </p>
-</div>