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<h1 id="diagnostics">Diagnostics</h1>
<p><code>#error</code> 와 <code>#warning</code> 지시자를 이용한 메시지는 <code>stderr</code> 로 출력됩니다.</p>
<h3 id="error">#error</h3>
<p>전처리 시에 fatal error 메시지를 출력할 때 사용하는 지시자 입니다.
지시자 이후에 오는 token 들은 메시지를 출력하는데 사용됩니다.
메시지에서 매크로 확장은 발생하지 않고 이어지는 spaces 들은 하나로 출력됩니다.
<code>#error</code> 지시자 위치에서 전처리가 종료되는 것은 아니고 끝까지 실행됩니다.</p>
<blockquote>
<p>전처리기 종료 상태 값으로 <code>1</code> 이 반환되고 이어지는 컴파일 작업은 중단됩니다.</p>
</blockquote>
<pre><code>/usr/include/x86_64-linux-gnu/bits/stdio.h 참조
#ifndef _STDIO_H
# error "Never include <bits/stdio.h> directly; use <stdio.h> instead."
#endif
-------------------------------------------
/usr/include/x86_64-linux-gnu/sys/elf.h 참조
#ifdef __x86_64__
# error This header is unsupported on x86-64.
#else
# warning "This header is obsolete; use <sys/procfs.h> instead."
</code></pre><h3 id="warning">#warning</h3>
<p>전처리 시에 warning 메시지를 출력할 때 사용하는 지시자 입니다.</p>
<blockquote>
<p>전처리기 종료 상태 값은 <code>0</code> 이되고 컴파일 작업은 정상적으로 진행됩니다.</p>
</blockquote>
<pre><code>/usr/include/math.h 참조
#if defined log && defined __GNUC__
# warning A macro called log was already defined when <math.h> was included.
# warning This will cause compilation problems.
#endif
-------------------------------------------------
/usr/include/features.h 참조
#if (defined _BSD_SOURCE || defined _SVID_SOURCE) && !defined _DEFAULT_SOURCE
# warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
# undef _DEFAULT_SOURCE
# define _DEFAULT_SOURCE 1
#endif
</code></pre><p>기본적으로 <a href="https://gcc.gnu.org/onlinedocs/cpp/System-Headers.html" target="_blank">시스템 헤더</a> 에서 발생하는 warning 은 출력되지 않습니다.
아래 첫 번째 예제를 보면 <code><stdio.h></code> 에는 <code>BUFSIZ</code> 매크로가 정의되어 있는데
동일한 매크로를 다른 값으로 정의하였으나 redefined warning 이 발생하지 않고 있습니다.
두 번째와 같이 #define 을 시스템 헤더 아래로 내려야 기존과 같이 warning 이 발생합니다.</p>
<blockquote>
<p>시스템 헤더에서 직접 #warning 지시자에 의한 메시지는 출력됩니다</p>
</blockquote>
<pre><code>$ gcpp > /dev/null
#define BUFSIZ 1234 // 또는 #include "myheader.h"
#include <stdio.h> // stdio.h 에 동일한 BUFSIZ 매크로가 정의되어
// 있지만 redefined warning 이 발생하지 않는다.
BUFSIZ
@
# empty
...........................................................................
$ gcpp > /dev/null
#include <stdio.h> // #define 을 시스템 헤더 아래로 내려야
#define BUFSIZ 1234 // 기존과 같이 warning 이 발생합니다.
BUFSIZ
@
<stdin>:2: warning: "BUFSIZ" redefined
In file included from <stdin>:1:
/usr/include/stdio.h:99: note: this is the location of the previous definition
99 | #define BUFSIZ 8192
|
</code></pre><h1 id="quiz">Quiz</h1>
<p><code>#include <signal.h></code> 할 경우 <code>sigset_t</code> 타입을 사용할 수 있는지 알려면 어떻게 할까요?</p>
<p>cpp 명령의 <code>-dD</code> 옵션을 이용하면 특정 헤더 파일이 #include 됐을 때
정의되는 매크로, 함수, typedef 정보들을 모두 볼 수가 있습니다.
하나의 헤더 파일이 #include 되면 실제로는 연관된 여러 개의 헤더 파일이 #include 되는데
이때 어떤 헤더 파일에 정의가 존재하는지도 알 수 있습니다.</p>
<p>다음을 보면 <code>#include <signal.h></code> 할 경우 <code>sigset_t</code> 타입이 정의되어 사용할 수 있고,
실제 정의가 존재하는 파일은 <code>/bits/types/sigset_t.h</code> 인 것을 알 수 있습니다. </p>
<pre><code class="lang-bash">bash$ cpp <span class="hljs-operator">-d</span>D <<< <span class="hljs-string">'#include <signal.h>'</span> | grep -w -B5 <span class="hljs-string">'sigset_t;'</span>
unsigned long int __val[(<span class="hljs-number">1024</span> / (<span class="hljs-number">8</span> * sizeof (unsigned long int)))];
} __sigset_t;
<span class="hljs-comment"># 5 "/usr/include/x86_64-linux-gnu/bits/types/sigset_t.h" 2 3 4 <---- 실제 정의가</span>
존재하는 파일
typedef __sigset_t sigset_t; <---- sigset_t 타입이 존재한다.
bash$ cpp <span class="hljs-operator">-d</span>D <<< <span class="hljs-string">'#include <signal.h>'</span> | grep -w -B5 <span class="hljs-string">'__sigset_t;'</span>
<span class="hljs-comment">#define _SIGSET_NWORDS (1024 / (8 * sizeof (unsigned long int)))</span>
typedef struct
{
unsigned long int __val[(<span class="hljs-number">1024</span> / (<span class="hljs-number">8</span> * sizeof (unsigned long int)))];
} __sigset_t;
</code></pre>
<p><code>#include <signal.h></code> 할 경우 <code>sigmask</code> 매크로를 사용할 수 있고
실제 정의는 <code>signal.h</code> 파일의 167 번 라인에 존재하는 것을 알 수 있습니다.</p>
<pre><code class="lang-bash">bash$ cpp <span class="hljs-operator">-d</span>D <<< <span class="hljs-string">'#include <signal.h>'</span> | grep -w -B3 <span class="hljs-string">'#define sigmask'</span>
extern void psiginfo (const siginfo_t *__pinfo, const char *__s);
<span class="hljs-comment"># 167 "/usr/include/signal.h" 3 4 <---- signal.h 파일의 167 번 라인</span>
<span class="hljs-comment">#define sigmask(sig) ((int)(1u << ((sig) - 1))) <---- sigmask 매크로가 존재 한다.</span>
</code></pre>
<p>매크로의 경우 확인할 수 있는 또 다른 방법은 다음과 같이 재정의 했을 때
warning 이 발생하면 정의되어 있는 것입니다.
이때도 매크로가 정의되어 있는 헤더 파일과 위치가 함께 표시됩니다.</p>
<pre><code class="lang-bash"><span class="hljs-comment"># signal.h 헤더에 sigmask 매크로가 정의되어 있는지 확인</span>
bash$ cpp <<< $<span class="hljs-string">'#include <signal.h>\n#define sigmask hello'</span> > /dev/null
<stdin>:<span class="hljs-number">2</span>: warning: <span class="hljs-string">"sigmask"</span> redefined
In file included from <stdin>:<span class="hljs-number">1</span>:
/usr/include/signal.h:<span class="hljs-number">167</span>: note: this is the location of the previous definition
<span class="hljs-number">167</span> | <span class="hljs-comment"># define sigmask(sig) ((int)(1u << ((sig) - 1))) <---- 정의되어 있다.</span>
|
<span class="hljs-comment"># 다음과 같이 정의되어 있다고만 나오면 predefined 매크로입니다.</span>
bash$ cpp <<< $<span class="hljs-string">'#include <signal.h>\n#define __INTPTR_TYPE__ hello'</span> > /dev/null
<stdin>:<span class="hljs-number">2</span>: warning: <span class="hljs-string">"__INTPTR_TYPE__"</span> redefined
<built-in>: note: this is the location of the previous definition
bash$ cpp <span class="hljs-operator">-d</span>M /dev/null | grep <span class="hljs-string">'__INTPTR_TYPE__'</span>
<span class="hljs-comment">#define __INTPTR_TYPE__ long int</span>
</code></pre>
<p><code>#include <stdio.h></code> 했을 때 참조되는 모든 헤더 파일을 보려면 <code>-M</code> 옵션을 사용하면 됩니다.</p>
<pre><code class="lang-bash">bash$ cpp -M <<< <span class="hljs-string">"#include <stdio.h>"</span>
-: /usr/include/stdc-predef.h /usr/include/stdio.h \
/usr/include/x86_64-linux-gnu/bits/libc-header-start.h \
/usr/include/features.h /usr/include/x86_64-linux-gnu/sys/cdefs.h \
/usr/include/x86_64-linux-gnu/bits/wordsize.h \
/usr/include/x86_64-linux-gnu/bits/long-double.h \
/usr/include/x86_64-linux-gnu/gnu/stubs.h \
. . .
. . .
</code></pre>
<h1 id="2-">2 .</h1>
<p>다음은 shell 함수를 활용하여 특정 헤더를 #include 했을 때 정의되어 있는
함수, 매크로, typedef, struct, enum 을 출력하는 것입니다.
헤더가 포함된 소스코드를 붙여넣기 하여 확장된 결과를 출력해 볼 수도 있습니다.</p>
<pre><code class="lang-bash"><span class="hljs-comment"># stdio.h, math.h 헤더를 #include 했을 때 정의되어 있는 함수를 출력 (함수형 매크로 포함)</span>
<span class="hljs-comment"># 기본적으로 이름 앞에 "_" 가 붙는 것은 제외하는데 포함시키려면 "-a" 옵션을 추가 하면 됩니다.</span>
$ header-function stdio.h math.h
$ header-function <<\@ <span class="hljs-comment"># heredoc 을 사용할 수도 있는데 이때는</span>
<span class="hljs-comment">#include <stdio.h> # #include 지시자가 포함되어야 합니다.</span>
<span class="hljs-comment">#include <math.h></span>
@
<span class="hljs-comment"># header-function 명령의 경우 "-t" 옵션을 추가하면 __attribute__ 도 출력됩니다.</span>
<span class="hljs-comment"># sys/select.h 헤더를 #include 했을 때 'FD_SET(foo, &bar)' 매크로 확장 결과를 출력</span>
$ header-macro sys/select.h <span class="hljs-operator">-e</span> <span class="hljs-string">'FD_SET(foo, &bar)'</span>
((void) (((&bar)->__fds_bits)[((foo) / (<span class="hljs-number">8</span> * (int) sizeof (__fd_mask)))]
|= ((__fd_mask) (<span class="hljs-number">1</span>UL << ((foo) % (<span class="hljs-number">8</span> * (int) sizeof (__fd_mask)))))))
<span class="hljs-comment"># 다음과 같이 하면 server.c 소스파일 전체의 매크로 확장 결과를 볼 수 있습니다.</span>
$ header-macro < server.c
$ cat server.c | header-macro
<span class="hljs-comment"># 다음과 같이 heredoc 을 이용해 코드를 붙여넣기 하여 확장 결과를 볼 수도 있습니다.</span>
$ header-macro <<\@
<span class="hljs-comment">#include <stdio.h> </span>
<span class="hljs-comment">#include <stdlib.h> </span>
<span class="hljs-comment">#include <sys/file.h> </span>
int <span class="hljs-function"><span class="hljs-title">main</span></span>() {
char buf[<span class="hljs-number">20</span>];
FILE *file = fopen(<span class="hljs-string">"tmp.txt"</span>, <span class="hljs-string">"r+"</span>);
flock( fileno(file), LOCK_EX);
<span class="hljs-keyword">for</span> (int i = <span class="hljs-number">1</span>; i <= <span class="hljs-number">100000</span>; i++) {
fseek( file, <span class="hljs-number">0</span>, SEEK_SET);
fgets( buf, sizeof buf, file);
long int num = strtol( buf, NULL, <span class="hljs-number">10</span>) + <span class="hljs-number">1</span>;
fseek( file, <span class="hljs-number">0</span>, SEEK_SET);
fprintf( file, <span class="hljs-string">"%ld\n"</span>, num);
}
flock( fileno(file), LOCK_UN);
}
@
<span class="hljs-comment"># 아무런 헤더를 주지 않으면 predefined macros 가 출력됩니다.</span>
$ header-macro
<span class="hljs-comment"># signal.h 헤더를 #include 했을 때 sigevent_t 타입 정의를 검색 (-s 옵션)</span>
$ header-typedef signal.h <span class="hljs-operator">-s</span> sigevent
$ header-typedef <<\@ <span class="hljs-operator">-s</span> sigevent
<span class="hljs-comment">#include <signal.h></span>
@
<span class="hljs-comment"># header-struct 은 struct 과 union 을 출력합니다.</span>
$ header-struct sys/socket.h
<span class="hljs-comment"># header-dump 는 별도의 필터링 없이 전체 확장 결과를 출력합니다.</span>
$ header-dump stdio.h
<span class="hljs-comment"># header-dump 에서 -l 옵션은 stdio.h 헤더가 참조하는 모든 헤더 목록을 출력합니다.</span>
$ header-dump <span class="hljs-operator">-l</span> stdio.h
<span class="hljs-comment"># 기타 cpp 옵션을 추가하려면 마지막에 '--' 붙이고 추가하면 됩니다.</span>
$ header-dump stdlib.h -- -D_GNU_SOURCE
$ header-struct foo.h <span class="hljs-operator">-s</span> bar -- -I . -I include
$ header-macro -- -I . -I include < foo.c
</code></pre>
<p>함수 사용을 위해선 <code>clang-format</code> 명령이 있어야 합니다.</p>
<pre><code class="lang-bash"><span class="hljs-keyword">function</span> header-<span class="hljs-function"><span class="hljs-title">dump</span></span> ()
{
<span class="hljs-built_in">local</span> hsum opts hlist=<span class="hljs-literal">false</span> clang_format
_header-args <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> || <span class="hljs-built_in">return</span>
<span class="hljs-built_in">eval</span> <span class="hljs-built_in">set</span> -- <span class="hljs-variable">$opts</span>
<span class="hljs-keyword">if</span> <span class="hljs-variable">$hlist</span>; <span class="hljs-keyword">then</span>
cpp -M <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span>
<span class="hljs-keyword">else</span>
cpp -P <span class="hljs-operator">-d</span>D <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span>
<span class="hljs-keyword">fi</span>
}
<span class="hljs-keyword">function</span> _header-<span class="hljs-function"><span class="hljs-title">format</span></span> ()
{
sed -En <span class="hljs-operator">-e</span> <span class="hljs-string">'/\a|^#pragma/d'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/^\{$/{ h; :X n; H; /^}/{ g; /}$/{ s/.*/;/p; b}; p; b}; bX}'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'p'</span> | <span class="hljs-built_in">eval</span> <span class="hljs-string">"<span class="hljs-variable">$clang_format</span>"</span>
}
<span class="hljs-keyword">function</span> header-<span class="hljs-function"><span class="hljs-title">function</span></span> ()
{
<span class="hljs-built_in">local</span> hsum opts search all=<span class="hljs-literal">false</span> allm attr=<span class="hljs-literal">false</span> clang_format
_header-args <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> || <span class="hljs-built_in">return</span>
<span class="hljs-built_in">eval</span> <span class="hljs-built_in">set</span> -- <span class="hljs-variable">$opts</span>
<span class="hljs-keyword">if</span> ! <span class="hljs-variable">$all</span>; <span class="hljs-keyword">then</span>
all=<span class="hljs-string">'\b[[:alpha:]]'</span>
allm=<span class="hljs-string">'/^#define _/d;'</span>
<span class="hljs-keyword">else</span>
<span class="hljs-built_in">unset</span> all allm
<span class="hljs-keyword">fi</span>
<span class="hljs-keyword">if</span> ! <span class="hljs-variable">$attr</span>; <span class="hljs-keyword">then</span>
<span class="hljs-built_in">set</span> -- <span class="hljs-string">'-D__attribute__(forRemoving)='</span> <span class="hljs-string">'-D__asm__(forRemoving)='</span> <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span>
attr=
<span class="hljs-keyword">else</span>
attr=<span class="hljs-string">' s/__\(/@/g'</span>
<span class="hljs-keyword">fi</span>
<span class="hljs-built_in">test</span> -n <span class="hljs-string">"<span class="hljs-variable">$search</span>"</span> && search=<span class="hljs-string">'\w*'</span><span class="hljs-variable">$search</span><span class="hljs-string">'\w*'</span> || search=<span class="hljs-string">'\w+'</span>
cpp -P <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span> | _header-format |
sed -En <span class="hljs-operator">-e</span> <span class="hljs-string">'/^(__extension__ |extern )?(typedef|struct|union|enum|extern) [^()]*[;{]$/ {'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/;$/d'</span> <span class="hljs-operator">-e</span> <span class="hljs-string">'/\{$/{ :X n; /^}/b; bX'</span> <span class="hljs-operator">-e</span> <span class="hljs-string">'}}'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/^\{$/{ :Y n; /^};?$/{ s//;/p; b}; bY }'</span> <span class="hljs-operator">-e</span> <span class="hljs-string">'p'</span> |
sed -zE <span class="hljs-string">'s/(\s*;)+/;\n/g'</span> |
sed -En <span class="hljs-operator">-e</span> <span class="hljs-string">'/^$/!H; /;$/ { g; s/\bsizeof\(//g; '</span><span class="hljs-string">"<span class="hljs-variable">$attr</span>"</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/'</span><span class="hljs-string">"<span class="hljs-variable">$all</span>"</span><span class="hljs-string">'\w+\(\s*\w/!bX; /__typeof__\(/bX;'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/'</span><span class="hljs-string">"<span class="hljs-variable">$search</span>"</span><span class="hljs-string">'\(/I{ /\btypedef /!{ g; p }}; :X z; h'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'}'</span> | <span class="hljs-built_in">eval</span> <span class="hljs-string">"<span class="hljs-variable">$clang_format</span>"</span>
<span class="hljs-built_in">echo</span>
cpp <span class="hljs-operator">-d</span>D <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span> |
sed -En <span class="hljs-operator">-e</span> <span class="hljs-string">"<span class="hljs-variable">$allm</span>"</span><span class="hljs-string">' /^#define '</span><span class="hljs-string">"<span class="hljs-variable">$search</span>"</span><span class="hljs-string">'\(/I{ s/$/\n/p }'</span> | <span class="hljs-built_in">eval</span> <span class="hljs-string">"<span class="hljs-variable">$clang_format</span>"</span>
}
<span class="hljs-keyword">function</span> header-<span class="hljs-function"><span class="hljs-title">macro</span></span> ()
{
<span class="hljs-built_in">local</span> hsum opts search expand all=<span class="hljs-literal">false</span> clang_format
_header-args <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> || <span class="hljs-built_in">return</span>
<span class="hljs-built_in">eval</span> <span class="hljs-built_in">set</span> -- <span class="hljs-variable">$opts</span>
! <span class="hljs-variable">$all</span> && all=<span class="hljs-string">'/^#define _/d;'</span> || <span class="hljs-built_in">unset</span> all
<span class="hljs-built_in">test</span> -n <span class="hljs-string">"<span class="hljs-variable">$search</span>"</span> && search=<span class="hljs-string">'\w*'</span><span class="hljs-variable">$search</span><span class="hljs-string">'\w*'</span> || search=<span class="hljs-string">'\w+'</span>
<span class="hljs-keyword">if</span> <span class="hljs-built_in">test</span> -n <span class="hljs-string">"<span class="hljs-variable">$hsum</span>"</span>; <span class="hljs-keyword">then</span>
<span class="hljs-keyword">if</span> <span class="hljs-built_in">test</span> -n <span class="hljs-string">"<span class="hljs-variable">$expand</span>"</span> ; <span class="hljs-keyword">then</span>
cpp <span class="hljs-operator">-d</span>I -P <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span>$<span class="hljs-string">'\n'</span><span class="hljs-variable">$expand</span>$<span class="hljs-string">'\n'</span> | sed <span class="hljs-string">'/\a/,/\a/d'</span>
<span class="hljs-keyword">else</span>
cpp <span class="hljs-operator">-d</span>D <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span> |
sed -En <span class="hljs-string">"<span class="hljs-variable">$all</span>"</span><span class="hljs-string">' /^#define '</span><span class="hljs-string">"<span class="hljs-variable">$search</span>"</span><span class="hljs-string">'/Ip'</span> | sort
<span class="hljs-keyword">fi</span>
<span class="hljs-keyword">else</span>
cpp <span class="hljs-operator">-d</span>M <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> /dev/null | sed -En <span class="hljs-string">'/^#define '</span><span class="hljs-string">"<span class="hljs-variable">$search</span>"</span><span class="hljs-string">'/Ip'</span> | sort
<span class="hljs-keyword">fi</span> | <span class="hljs-built_in">eval</span> <span class="hljs-string">"<span class="hljs-variable">$clang_format</span>"</span>
}
<span class="hljs-keyword">function</span> header-<span class="hljs-function"><span class="hljs-title">enum</span></span> ()
{
<span class="hljs-built_in">local</span> hsum opts search clang_format
_header-args <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> || <span class="hljs-built_in">return</span>
<span class="hljs-built_in">eval</span> <span class="hljs-built_in">set</span> -- <span class="hljs-variable">$opts</span>
<span class="hljs-built_in">test</span> -n <span class="hljs-string">"<span class="hljs-variable">$search</span>"</span> && search=<span class="hljs-string">'/'</span><span class="hljs-variable">$search</span><span class="hljs-string">'/I!b;'</span>
cpp -P <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span> | _header-format |
sed -En <span class="hljs-operator">-e</span> <span class="hljs-string">'/^(typedef )?enum .*\{/ { h '</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/;$/ bZ'</span> <span class="hljs-operator">-e</span> <span class="hljs-string">':X n; H; /^}/{ g; bZ }; bX'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">':Z '</span><span class="hljs-string">"<span class="hljs-variable">$search</span>"</span><span class="hljs-string">' s/$/\n/p }'</span>
}
<span class="hljs-keyword">function</span> header-<span class="hljs-function"><span class="hljs-title">typedef</span></span> ()
{
<span class="hljs-built_in">local</span> hsum opts all=<span class="hljs-literal">false</span> all1 all2 search r clang_format
_header-args <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> || <span class="hljs-built_in">return</span>
<span class="hljs-built_in">eval</span> <span class="hljs-built_in">set</span> -- <span class="hljs-variable">$opts</span>
r=<span class="hljs-string">'([][[:alnum:]_]|[ ]*,[ ]*|[*][ ]*)'</span>
<span class="hljs-keyword">if</span> ! <span class="hljs-variable">$all</span>; <span class="hljs-keyword">then</span>
all1=<span class="hljs-string">'/\b[[:alpha:]]'</span><span class="hljs-variable">$r</span>*<span class="hljs-string">';$/!b;'</span>
all2=<span class="hljs-string">'/\b[[:alpha:]]'</span><span class="hljs-variable">$r</span>*<span class="hljs-string">'\)?\(/!b;'</span>
<span class="hljs-keyword">fi</span>
<span class="hljs-built_in">test</span> -n <span class="hljs-string">"<span class="hljs-variable">$search</span>"</span> && search=<span class="hljs-variable">$r</span>*<span class="hljs-variable">$search</span><span class="hljs-variable">$r</span>* || search=<span class="hljs-variable">$r</span>*
cpp -P <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span> | _header-format |
sed -En <span class="hljs-operator">-e</span> <span class="hljs-string">'/^(__extension__ )?typedef /{'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/\{$/ { h; :X n; H; /^}/{ g; bZ1 }; bX }'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/;$/ { h; /__attribute__/bZ1; /\(/bZ2; bZ1 }'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'h; :Y n; H; /;$/{ g; /__attribute__/bZ1; bZ2 }; bY'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">':Z1 s/\s*__attribute__.*\)\)//; '</span><span class="hljs-string">"<span class="hljs-variable">$all1</span>"</span><span class="hljs-string">' /'</span><span class="hljs-string">"<span class="hljs-variable">$search</span>"</span><span class="hljs-string">';$/I{ g; s/$/\n/p }; b'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">':Z2 '</span><span class="hljs-string">"<span class="hljs-variable">$all2</span>"</span><span class="hljs-string">' /'</span><span class="hljs-string">"<span class="hljs-variable">$search</span>"</span><span class="hljs-string">'\)?\(/I{ s/$/\n/p }; b'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'}'</span>
}
<span class="hljs-keyword">function</span> header-<span class="hljs-function"><span class="hljs-title">struct</span></span> ()
{
<span class="hljs-built_in">local</span> hsum opts search all=<span class="hljs-literal">false</span> clang_format
_header-args <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> || <span class="hljs-built_in">return</span>
<span class="hljs-built_in">eval</span> <span class="hljs-built_in">set</span> -- <span class="hljs-variable">$opts</span>
! <span class="hljs-variable">$all</span> && all=<span class="hljs-string">'/^(typedef )?(struct|union) [a-zA-Z]/!b;'</span> || <span class="hljs-built_in">unset</span> all
<span class="hljs-built_in">test</span> -n <span class="hljs-string">"<span class="hljs-variable">$search</span>"</span> && search=<span class="hljs-string">'\w*'</span><span class="hljs-variable">$search</span><span class="hljs-string">'\w*'</span> || search=<span class="hljs-string">'\w+'</span>
cpp -P <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span> <<< <span class="hljs-variable">$hsum</span> | _header-format |
sed -En <span class="hljs-operator">-e</span> <span class="hljs-string">'/^(typedef )?(struct|union) .*\{/ {'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'/;$/ bY'</span> <span class="hljs-operator">-e</span> <span class="hljs-string">'h; :X n; H; /^}/{ g; bY }; bX;'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">':Y '</span><span class="hljs-string">"<span class="hljs-variable">$all</span>"</span><span class="hljs-string">' /^(typedef )?(struct|union) '</span><span class="hljs-string">"<span class="hljs-variable">$search</span>"</span><span class="hljs-string">' \{/I{ s/$/\n/p }'</span> \
<span class="hljs-operator">-e</span> <span class="hljs-string">'}'</span>
}
<span class="hljs-keyword">function</span> _header-<span class="hljs-function"><span class="hljs-title">args</span></span> ()
{
<span class="hljs-built_in">local</span> line
clang_format=<span class="hljs-string">'clang-format -style="{ AllowShortFunctionsOnASingleLine: None,
IndentWidth: 4, BraceWrapping: { AfterFunction: true }, BreakBeforeBraces: Custom }"'</span>
<span class="hljs-keyword">if</span> <span class="hljs-built_in">test</span> <span class="hljs-variable">$#</span> <span class="hljs-operator">-gt</span> <span class="hljs-number">0</span>; <span class="hljs-keyword">then</span>
options=$(getopt -o s:e:lat -- <span class="hljs-string">"<span class="hljs-variable">$@</span>"</span>) || <span class="hljs-built_in">return</span>
<span class="hljs-built_in">eval</span> <span class="hljs-built_in">set</span> -- <span class="hljs-variable">$options</span>
<span class="hljs-keyword">while</span> <span class="hljs-literal">true</span>; <span class="hljs-keyword">do</span>
<span class="hljs-keyword">case</span> <span class="hljs-variable">$1</span> <span class="hljs-keyword">in</span>
<span class="hljs-operator">-s</span>) <span class="hljs-comment"># 검색 옵션</span>
[ <span class="hljs-string">"<span class="hljs-variable">${FUNCNAME[1]}</span>"</span> != <span class="hljs-string">"header-dump"</span> ] && search=<span class="hljs-variable">$2</span>
<span class="hljs-built_in">shift</span> <span class="hljs-number">2</span> ;;
<span class="hljs-operator">-e</span>) <span class="hljs-comment"># header-macro 확장 옵션</span>
[ <span class="hljs-string">"<span class="hljs-variable">${FUNCNAME[1]}</span>"</span> = <span class="hljs-string">"header-macro"</span> ] && expand=<span class="hljs-variable">$2</span>
<span class="hljs-built_in">shift</span> <span class="hljs-number">2</span> ;;
<span class="hljs-operator">-a</span>) <span class="hljs-comment"># underline 이름까지 출력</span>
[ <span class="hljs-string">"<span class="hljs-variable">${FUNCNAME[1]}</span>"</span> != <span class="hljs-string">"header-enum"</span> ] && all=<span class="hljs-literal">true</span>
<span class="hljs-built_in">shift</span> ;;
-t) <span class="hljs-comment"># header-function 에서 __attribute__ 도 출력</span>
[ <span class="hljs-string">"<span class="hljs-variable">${FUNCNAME[1]}</span>"</span> = <span class="hljs-string">"header-function"</span> ] && attr=<span class="hljs-literal">true</span>
<span class="hljs-built_in">shift</span> ;;
<span class="hljs-operator">-l</span>) <span class="hljs-comment"># header-dump 에서 header 목록 출력</span>
[ <span class="hljs-string">"<span class="hljs-variable">${FUNCNAME[1]}</span>"</span> = <span class="hljs-string">"header-dump"</span> ] && hlist=<span class="hljs-literal">true</span>
<span class="hljs-built_in">shift</span> ;;
--)
<span class="hljs-built_in">shift</span>
<span class="hljs-keyword">while</span> [[ <span class="hljs-variable">$1</span> =~ ([<\<span class="hljs-string">"])?([[:alnum:]_/.-]+\.[hc])([\">])? ]]; do
if [ -n "</span><span class="hljs-variable">${BASH_REMATCH[1]}</span><span class="hljs-string">" ]; then
hsum+=$'\n\a\n#include '<span class="hljs-variable">${BASH_REMATCH[1]}</span><span class="hljs-variable">${BASH_REMATCH[2]}</span><span class="hljs-variable">${BASH_REMATCH[3]}</span>$'\n\a\n'
else
hsum+=$'\n\a\n#include <'<span class="hljs-variable">${BASH_REMATCH[2]}</span>$'>\n\a\n'
fi
shift
done
break
esac
done
if [ <span class="hljs-variable">$#</span> -gt 0 ]; then opts=`printf "</span>%q <span class="hljs-string">" "</span><span class="hljs-variable">$@</span><span class="hljs-string">"`; fi
fi
if ! test -t 0; then
while IFS= read -r line; do
if [[ <span class="hljs-variable">$line</span> =~ ^[[:blank:]]*\#[[:blank:]]*include ]]; then
hsum+=$'\n\a\n'<span class="hljs-variable">$line</span>$'\n\a\n'
else
hsum+=<span class="hljs-variable">$line</span>$'\n'
if [[ "</span><span class="hljs-variable">${FUNCNAME[1]}</span><span class="hljs-string">" = "</span>header-macro<span class="hljs-string">" &&
-z <span class="hljs-variable">$expand</span> && ! <span class="hljs-variable">$line</span> =~ ^[[:blank:]]*$|^[[:blank:]]*\# ]]
then expand=$'\n'; fi
fi
done
fi
}
</span></code></pre>
<p>다음은 위에서 작성한 명령들을 사용할때 헤더이름 입력을 위한 자동완성 함수 입니다.<br>glob 문자를 이용한 검색도 가능하고 ( <code>*foo*[tab]</code> ), 검색 후 번호를 이용한 입력도 됩니다 ( <code>15[tab]</code> )</p>
<pre><code class="lang-sh"><span class="hljs-function"><span class="hljs-title">_header_comp_bind</span></span>() { <span class="hljs-built_in">bind</span> <span class="hljs-string">'"\011": complete'</span> ;}
<span class="hljs-function"><span class="hljs-title">_header_comp_search</span></span>()
{
<span class="hljs-built_in">local</span> res count opt
_header_comp_number=<span class="hljs-string">""</span>
words=$( <<< <span class="hljs-variable">$words</span> sort -u )
<span class="hljs-built_in">local</span> IFS=$<span class="hljs-string">'\n'</span>; <span class="hljs-built_in">echo</span>
<span class="hljs-keyword">for</span> v <span class="hljs-keyword">in</span> <span class="hljs-variable">$words</span>; <span class="hljs-keyword">do</span>
<span class="hljs-keyword">if</span> [[ <span class="hljs-variable">$v</span> == <span class="hljs-variable">$cur</span> ]]; <span class="hljs-keyword">then</span>
res+=$<span class="hljs-string">'\e[36m'</span><span class="hljs-string">"<span class="hljs-variable">$v</span>"</span>$<span class="hljs-string">'\e[0m\n'</span>
<span class="hljs-built_in">let</span> count++
_header_comp_number+=<span class="hljs-string">"<span class="hljs-variable">$count</span> <span class="hljs-variable">$v</span>"</span>$<span class="hljs-string">'\n'</span>
<span class="hljs-keyword">fi</span>
<span class="hljs-keyword">done</span>
(( count >= LINES )) && opt=<span class="hljs-string">"+Gg"</span>
less -FRSXiN <span class="hljs-variable">$opt</span> <<< <span class="hljs-variable">${res%$'\n'}</span>
<span class="hljs-built_in">bind</span> -x <span class="hljs-string">'"\011": _header_comp_bind'</span>
}
<span class="hljs-function"><span class="hljs-title">_header_comp</span></span>()
{
<span class="hljs-built_in">local</span> IFS=$<span class="hljs-string">' \t\n'</span> cmd=<span class="hljs-variable">$1</span> cur=<span class="hljs-variable">${COMP_WORDS[COMP_CWORD]}</span> words <span class="hljs-built_in">dirs</span> i
COMP_LINE=<span class="hljs-variable">${COMP_LINE:0:$COMP_POINT}</span>
[[ <span class="hljs-variable">${COMP_LINE: -1}</span> = <span class="hljs-string">" "</span> ]] && cur=<span class="hljs-string">""</span>
<span class="hljs-keyword">for</span> (( i = <span class="hljs-number">1</span>; i < <span class="hljs-variable">${#COMP_WORDS[@]}</span>; i++ )); <span class="hljs-keyword">do</span>
[[ <span class="hljs-variable">${COMP_WORDS[i]}</span> == <span class="hljs-string">"--"</span> ]] && <span class="hljs-built_in">break</span>
<span class="hljs-keyword">done</span>
<span class="hljs-keyword">if</span> (( i < <span class="hljs-variable">${#COMP_WORDS[@]}</span> )); <span class="hljs-keyword">then</span>
<span class="hljs-keyword">for</span> (( i = i + <span class="hljs-number">1</span>; i < <span class="hljs-variable">${#COMP_WORDS[@]}</span>; i++ )); <span class="hljs-keyword">do</span>
<span class="hljs-keyword">if</span> [[ <span class="hljs-variable">${COMP_WORDS[i]}</span> == -I ]]; <span class="hljs-keyword">then</span>
[[ <span class="hljs-operator">-d</span> <span class="hljs-variable">${COMP_WORDS[++i]}</span> ]] && <span class="hljs-built_in">dirs</span>+=<span class="hljs-variable">${COMP_WORDS[i]}</span>$<span class="hljs-string">'\n'</span>
<span class="hljs-keyword">elif</span> [[ <span class="hljs-variable">${COMP_WORDS[i]}</span> == -I* ]]; <span class="hljs-keyword">then</span>
[[ <span class="hljs-operator">-d</span> <span class="hljs-variable">${COMP_WORDS[i]#-I}</span> ]] && <span class="hljs-built_in">dirs</span>+=<span class="hljs-variable">${COMP_WORDS[i]#-I}</span>$<span class="hljs-string">'\n'</span>
<span class="hljs-keyword">fi</span>
<span class="hljs-keyword">done</span>
<span class="hljs-keyword">fi</span>
<span class="hljs-built_in">dirs</span>+=$(
<span class="hljs-keyword">if</span> [[ <span class="hljs-variable">$cmd</span> == *k ]]; <span class="hljs-keyword">then</span>
<span class="hljs-built_in">declare</span> <span class="hljs-operator">-f</span> _header-kernel | sed -En <span class="hljs-string">'s/ (-I[ ]*[^ ]+)/\n\1/g; T; :X /^-I/{ s/^-I[ ]*//; P}; s/.*\n?//M1; /[[:alpha:]]/bX'</span>
<span class="hljs-keyword">else</span>
gcc -E -xc -Wp,-v /dev/null |& sed -En <span class="hljs-string">'/#include <...> search/,/End of search/{ //d; p }'</span>
<span class="hljs-keyword">fi</span>
)
words=$( <<< <span class="hljs-variable">$dirs</span> xargs -i sh -c <span class="hljs-string">'cd {} && find -name "*.h" -printf "%P\n"'</span> )
<span class="hljs-keyword">if</span> [[ <span class="hljs-variable">$cur</span> == +([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]) ]]; <span class="hljs-keyword">then</span>
words=$( <<< <span class="hljs-variable">$_header_comp_number</span> awk <span class="hljs-string">'$1 == '</span><span class="hljs-string">"<span class="hljs-variable">$cur</span>"</span><span class="hljs-string">' { print $2; exit }'</span> )
COMPREPLY=( <span class="hljs-string">"<span class="hljs-variable">$words</span>"</span> )
<span class="hljs-keyword">elif</span> [[ <span class="hljs-variable">$cur</span> == *[[*?]* ]]; <span class="hljs-keyword">then</span>
_header_comp_search
<span class="hljs-keyword">else</span>
COMPREPLY=($(compgen -W <span class="hljs-string">"<span class="hljs-variable">$words</span>"</span> -- <span class="hljs-string">"<span class="hljs-variable">$cur</span>"</span>))
<span class="hljs-keyword">fi</span>
}
complete -F _header_comp header-{macro,<span class="hljs-keyword">function</span>,struct,typedef,enum,dump}{,k}