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Watson id:Watson

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Cè¨€èªž(C++)ãŒå¿…è¦ãªäººã¨å¿…è¦ãªã„äºº - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? Cè¨€èªžãŒå¿…è¦ãªäºº Cè¨€èªžã¯ã€Cã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã‚’æ›¸ãã“ã¨ã¨ã€UNIXã®ã‚ˆã†ãªOSã‚’æ›¸ãã“ã¨ã§ç™ºå±•ã—ã¦ããŸã€‚ Cè¨€èªžã®ä»•æ§˜ã«ã¯ã€POSIX OSï¼ˆUNIX, Linux, mac OSï¼‰ä¸Šã§ä½¿ã†Hostedç’°å¢ƒã¨ã€POSIXOSã‚’ä½¿ã‚ãªã„Freestandingç’°å¢ƒã®ï¼’ç¨®é¡žãŒã‚ã‚‹ã€‚ Cè¨€èªžã¯å¿…è¦ãªã„ã¨ã„ã†äººã®å¤šãã¯ã€Hostedç’°å¢ƒã®ã“ã¨ã—ã‹çŸ¥ã‚‰ãªã„ã‚‰ã—ã„ã€‚ OSã¾ãŸã¯ãƒ‡ãƒã‚¤ã‚¹ãƒ‰ãƒ©ã‚¤ãƒã‚’æ›¸ãã¤ã‚‚ã‚ŠãŒãªã‘ã‚Œã°ã€ã€ŒCè¨€èªžã¯è¦ã‚‰ãªã„ã€ã®ã¯ç†è§£ã§ãã‚‹ã€‚ Cã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã€C++ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã‚’æ›¸ãã¤ã‚‚ã‚Šã®äººã¯ã€Cè¨€èªžã¾ãŸã¯C++ã¯è¦ã‚‹ã€‚ä»–ã®è¨€èªžã®ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã‚‚C
Watson 2025/01/22
c
ãƒªãƒ³ã‚¯
åå‰ä»˜ããƒ«ãƒ¼ãƒ— in æ¨™æº–C - yohhoyã®æ—¥è¨˜
ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžCã®æ¬¡æœŸæ¨™æº–C2yã§ã¯ã€åå‰ä»˜ããƒ«ãƒ¼ãƒ—(Named Loop)æ§‹æ–‡ã¨ã—ã¦breakï¼continueæ–‡ã¸ã®ãƒ©ãƒ™ãƒ«æŒ‡å®šãŒã‚µãƒãƒ¼ãƒˆã•ã‚Œã‚‹ã€‚ // C2y outer: for (int i = 0; i < N; ++i) { for (int j = 0; j < M; ++j) { break; // å†…éƒ¨ãƒ«ãƒ¼ãƒ—è„±å‡º: 1)ã¸ break outer; // å¤–éƒ¨ãƒ«ãƒ¼ãƒ—è„±å‡º: 2)ã¸ } // 1) } // 2) åŒæ§˜ã®æ§‹æ–‡ã¯Java*1, JavaScript*2, Rust*3, Go*4ç‰ã§ã‚‚ã‚µãƒãƒ¼ãƒˆã•ã‚Œã¦ã„ã‚‹ã€‚ é–¢é€£URL N3355 Named loops, v3 https://gcc.gnu.org/pipermail/gcc-patches/2024-October/665061.html *1:https://docs.oracle.com/javas
Watson 2025/01/12
c
ãƒªãƒ³ã‚¯
Writing a simple pool allocator in C
I found out about pool allocators some time ago, and I really liked its simplicity and high performance, so I decided to write my own. This article was initially inspired by Dmitry Soshnikovâ€™s article. Itâ€™s also worth mentioning that this article was discussed in Hacker News. Similarly to malloc, a pool allocator allows the user to allocate memory at run time. The pool allocator, however, is much
Watson 2025/01/09
c

malloc
ãƒªãƒ³ã‚¯
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RubyãŒå¥½ããªã®ã«Rubyã‚ˆã‚ŠCã‚„C++ã‚’æ›¸ã„ã¦ã„ã‚‹æ™‚é–“ã®æ–¹ãŒé•·ã„é ˆè—¤ã§ã™ã€‚Cã§æ›¸ã‹ã‚ŒãŸãƒ—ãƒã‚°ãƒ©ãƒ ã®ãƒ‡ãƒãƒƒã‚°ã«ä¾¿åˆ©ãªaddr2lineã‚’ãƒ‡ãƒãƒƒã‚°æƒ…å ±ãŒåˆ†é›¢ã•ã‚ŒãŸãƒ•ã‚¡ã‚¤ãƒ«ã«å¯¾ã—ã¦ä½¿ã†æ–¹æ³•ã‚’èª¬æ˜Žã—ã¾ã™ã€‚ addr2line ã¾ãšã€å‰æçŸ¥è˜ã¨ã—ã¦addr2lineã«ã¤ã„ã¦èª¬æ˜Žã—ã¾ã™ã€‚ã‚ã‚Œï¼Ÿèª¬æ˜Žã™ã‚‹ã‹ã€ã¨æ€ã£ã¦ã¿ãŸã‚‚ã®ã®ã‚ã‚“ã¾ã‚Šè©³ã—ãçŸ¥ã‚‰ãªã„æ°—ãŒã™ã‚‹ãªã€‚ã€‚ã€‚ã¾ãã€ç§ãŒçŸ¥ã£ã¦ã„ã‚‹ç¯„å›²ã§èª¬æ˜Žã—ã¾ã™ã€‚ addr2lineã¯GNU Binutilsã«å«ã¾ã‚Œã¦ã„ã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã®1ã¤ã§ã€ã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’å…ƒã«ã€ãã‚Œã«å¯¾å¿œã™ã‚‹ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã®ä½ç½®ã‚’ç‰¹å®šã™ã‚‹ä¾¿åˆ©ãƒ—ãƒã‚°ãƒ©ãƒ ã§ã™ã€‚ã¨ã„ã£ã¦ã‚‚ã€ã“ã‚Œã§ãƒ”ãƒ³ã¨ãã‚‹äººã¯ã„ãªã„ã§ã—ã‚‡ã†ã€‚ã©ã®ã€Œã‚¢ãƒ‰ãƒ¬ã‚¹ã€ã‚’å…ƒã«ã™ã‚‹ã®ï¼Ÿã¨ã„ã†ã¨ã“ã‚ãŒãƒ”ãƒ³ã¨ã“ãªã„ã¨æ€ã„ã¾ã™ã€‚ å¤šãã®å ´åˆã€addr2lineã«ä¸Žãˆã‚‹ã‚¢ãƒ‰ãƒ¬ã‚¹ã¯glibcã®ãƒãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹ç”¨é–¢æ•°ã§å‡ºåŠ›ã—ãŸãƒãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹å†…ã«å«ã¾ã‚Œã¦ã„ã¾ã™ã€‚ã¨ã„ã†ã‹
Watson 2024/12/26
c

debug
ãƒªãƒ³ã‚¯
Parsing Protobuf at 2+GB/s: How I Learned To Love Tail Calls in C
An exciting feature just landed in the main branch of the Clang compiler. Using the [[clang::musttail]] or __attribute__((musttail)) statement attributes, you can now get guaranteed tail calls in C, C++, and Objective-C. While tail calls are usually associated with a functional programming style, I am interested in them purely for performance reasons. It turns out that in some cases we can use tai
Watson 2024/08/20
c
ãƒªãƒ³ã‚¯
Cè¨€èªžã®çŸ¥ã‚‰ã‚Œã‚¶ãƒ«ãƒ»è¨±ã•ã‚Œã‚¶ãƒ«ä»•æ§˜ - Qiita
ã¯ã˜ã‚ã« ã©ã†ã‚‚ã€y-tetsuã§ã™ã€‚ ã‹ã‚Œã“ã‚ŒCè¨€èªžã«ã¯ã€10å¹´ä»¥ä¸Šæºã‚ã£ã¦ã„ã‚‹ã®ã§ã™ãŒã€æœ€è¿‘ãµã¨å¦ã³ãªãŠã—ã‚’ã—ã¦ã„ã¾ã™ã€‚ ã€ŒCã‚¯ã‚¤ãƒƒã‚¯ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ç¬¬2ç‰ˆã€ã“ã‚Œã‚’å®Œèµ°ã‚ã–ã—ã¦èªã¿å§‹ã‚ã¾ã—ãŸã€‚å…¨816ãƒšãƒ¼ã‚¸ã®è¶…å¤§ä½œï¼ å…ˆã¯é•·ã„ã®ã§ã€æ—¥é ƒã‹ã‚‰ã‹ãŸã‚ã‚‰ã«ç½®ã„ã¦ãŠãã€è¡¨ç´™ã®ç‰›ã•ã‚“(é›Œç‰›)ã¨ç›®ãŒåˆã£ãŸã‚‰é»™ã£ã¦å°‘ã—èªã‚€ã‚ˆã†ã«ã—ã¦ã„ã¾ã™ã€‚ è¨€èªžã®"æ´"ã ã‘ã¯é•·ã„ç†è€…ã§ã™ãŒã€ã“ã®æœ¬ã‚’ã¡ã‚‰ã£ã¨èªã‚“ã ã ã‘ã§ã‚‚ã„ã¾ã ã«çŸ¥ã‚‰ãªã‹ã£ãŸã“ã¨ãŒçµæ§‹æ½œã‚“ã§ã„ã¾ã—ãŸã€‚æ„å¤–ã¨å·±ã®"ç›®"ã£ã¦ã‚¶ãƒ«ã§ã—ãŸã€‚ ãã‚“ãªã“ã‚“ãªã§å¦ã³ãªãŠã—ã®ãŸã‚ã€ä»Šå›žã¯ç†è€…ãŒæ„Ÿã˜ãŸã¾ã¾ã®çŸ¥ã‚‰ã‚Œã‚¶ãƒ«ãã—ã¦è¨±ã•ã‚Œã‚¶ãƒ«ãªCè¨€èªžã®ä»•æ§˜ã«ã¤ã„ã¦ã€å‚™å¿˜éŒ²ã‚’æ®‹ã—ã¾ã™ã€‚ çŸ¥ã‚‰ã‚Œã‚¶ãƒ«ä»•æ§˜ æ¥ãšã‹ã—ãªãŒã‚‰ã€ä»Šã¾ã§å˜ã˜ä¸Šã’ã‚¶ãƒ«ã ã£ãŸã‚·ãƒªãƒ¼ã‚ºã€‚ ãƒ€ã‚¤ã‚°ãƒ©ãƒ• åå‰ã‹ã‚‰ã—ã¦ï¼Ÿï¼Ÿï¼Ÿã ã£ãŸã‚“ã§ã™ãŒã€ã‚ãƒ¼ãƒœãƒ¼ãƒ‰ã«ã‚ˆã£ã¦ã¯å˜åœ¨ã—ãªã„è¨˜å·ã‚’åˆ¥ã®2æ–‡å—ã§è¡¨ã‚ã™ãŸã‚ã®ã‚‚ã®ã ãã†ã§ã™ã€‚ ï¼ï¼Ÿâ€¦ã£
Watson 2024/07/29
c
ãƒªãƒ³ã‚¯
rr: lightweight recording & deterministic debugging
what rr does rr aspires to be your primary C/C++ debugging tool for Linux, replacing â€” well, enhancing â€” gdb. You record a failure once, then debug the recording, deterministically, as many times as you want. The same execution is replayed every time. rr also provides efficient reverse execution under gdb. Set breakpoints and data watchpoints and quickly reverse-execute to where they were hit. rr
Watson 2024/07/23
c

c++

debug
ãƒªãƒ³ã‚¯
Cè¨€èªžã®ã‚¢ãƒãƒ¼æ¼”ç®—åã£ã¦ã©ã“ã¾ã§ç¹‹ã’ã‚‰ã‚Œã‚‹ã‚“ã ã‚ã†ã‹ | DevelopersIO
#include<stdio.h> #include<stdlib.h> struct PointerLimit{ struct PointerLimit* next; int value; } typedef PointerLimit; PointerLimit* getTail(PointerLimit* base){ while(base->next != NULL){ base = base->next; } return base; } PointerLimit* add(PointerLimit* base, int value){ PointerLimit* new = (PointerLimit*)malloc(sizeof(PointerLimit)); new->value = value; new->next = NULL; PointerLimit* tail =
Watson 2024/07/05
c
ãƒªãƒ³ã‚¯
Cè¨€èªžã‚’ãƒžã‚¹ã‚¿ãƒ¼ã—ãŸã„äººã¯GCCã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³14ã‚’ä½¿ã„ã¾ã—ã‚‡ã† - pyopyopyo - Linuxã¨ã‹ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã®è¦šãˆæ›¸ã -
Cè¨€èªžï¼ˆC++ã‚’å«ã‚€ï¼‰ã‚’ç¿’å¾—ã—ãŸã„äººï¼Œãƒã‚¤ãƒ³ã‚¿ã‚’å‹‰å¼·ã—ãŸã„äººã¯gcc-14ã‚’ä½¿ã„ã¾ã—ã‚‡ã†ï¼Žé›£ã—ã„ã¨ã“ã‚ã¯ gcc-14 ãŒä¸å¯§ã«è§£èª¬ã—ã¦ãã‚Œã¾ã™ Cè¨€èªžã®é›£ã—ã„ã¨ã“ã‚ ä¾‹ã‚’ç¤ºã—ã¾ã™ï¼ŽCè¨€èªžã§è¨˜è¿°ã•ã‚ŒãŸï¼ŒãŸã£ãŸï¼–è¡Œã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã§ã™ int main() { int buf[10]; buf[10] = 0; return 0; } ã“ã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã«ã¯å•é¡ŒãŒã‚ã‚Šã¾ã™ï¼Žåˆè¦‹ã§ã‚ã‹ã‚‹ã§ã—ã‚‡ã†ã‹ï¼Ÿ : : : å•é¡ŒãŒã‚ã‚‹ã®ã¯ buf[10]=0 ã®éƒ¨åˆ†ã§ã™ï¼ŽCè¨€èªžã§ã‚„ã‚ŠãŒã¡ãªãƒŸã‚¹ã§ã™ãŒï¼Œã“ã‚ŒãŒãƒã‚°ã‚„ã‚»ã‚ãƒ¥ãƒªãƒ†ã‚£ãƒ›ãƒ¼ãƒ«ã®åŽŸå› ã«ãªã‚Šã¾ã™ï¼Ž Cè¨€èªžãŒé›£ã—ã„ç†ç”±ã¯äºŒã¤ã‚ã‚Šã¾ã™ï¼Žã“ã®æ‰‹ã®å•é¡Œã‚’è¦‹é€ƒã—ã‚„ã™ã„ç‚¹ã¨ï¼Œã“ã®æ‰‹ã®å•é¡Œã‚’ç†è§£ã™ã‚‹ã“ã¨ãŒé›£ã—ã„ç‚¹ã®äºŒã¤ã§ã™ gcc 14 ã«è§£èª¬ã—ã¦ã‚‚ã‚‰ã„ã¾ã—ã‚‡ã† ä¸Šè¨˜ã®ï¼–è¡Œã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’gcc14ã‚’ä½¿ã£ã¦ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ã—ã¦ã¿ã¾ã™ ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã®ãƒ•ã‚¡ã‚¤ãƒ«åã¯ test.c ã¨
Watson 2024/06/11
gcc

c
ãƒªãƒ³ã‚¯
C23ã®æ”¹å–„ç‚¹ï¼šæ–‡å—åˆ—æ¤œç´¢é–¢æ•°ã§ã®constæ€§ã®ç¶æŒ
æ–‡å—åˆ—æ¤œç´¢é–¢æ•°ã¨constæ€§ Cè¨€èªžã«ã¯æ–‡å—åˆ—ç‰ã®æ¤œç´¢é–¢æ•°ãŒã„ãã¤ã‹å®šç¾©ã•ã‚Œã¦ã„ã¾ã™ã€‚ã“ã‚Œã‚‰ã®é–¢æ•°ãŒãƒã‚¤ãƒ³ã‚¿ãƒ¼ã‚’è¿”ã™å ´åˆã€å…ƒã®é…åˆ—ãŒæ›¸ãè¾¼ã¿å¯èƒ½ã§ã‚ã‚Œã°è¿”ã£ã¦ãã‚‹ãƒã‚¤ãƒ³ã‚¿ãƒ¼ã‚‚æ›¸ãè¾¼ã¿å¯èƒ½ã§ã‚ã£ã¦æ¬²ã—ã„ã§ã™ã€‚ã¤ã¾ã‚Šã€æ¬¡ã®ã‚³ãƒ¼ãƒ‰ã¯ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ãŒé€šã£ã¦æ¬²ã—ã„ã§ã™ï¼š #include <stdio.h> #include <string.h> int main(void) { char s[] = "Hello world!"; char *p = strchr(s, 'o'); *p = ' '; // æ¤œç´¢ã—ã¦å¾—ã‚‰ã‚ŒãŸãƒã‚¤ãƒ³ã‚¿ãƒ¼ã«å¯¾ã—ã¦æ›¸ãè¾¼ã‚€ printf("%s\n", s); // => Hell world! }
Watson 2024/04/27
c
ãƒªãƒ³ã‚¯
Cè¨€èªžå‘ã‘ã‚³ãƒ«ãƒ¼ãƒãƒ³éžåŒæœŸ I/O ãƒ©ã‚¤ãƒ–ãƒ©ãƒª neco ã‚’ä½¿ã£ã¦ã¿ãŸã€‚
ã¯ã˜ã‚ã« Cè¨€èªžã§ã‚³ãƒ«ãƒ¼ãƒãƒ³ã‚’æ‰±ã†æ–¹æ³•ã¯è‰²ã€…ã‚ã‚Šã¾ã™ãŒã€å°‚ç”¨ã®å‘½ä»¤ã‚’å°‚ç”¨ã®è¨˜è¿°æ–¹æ³•ã§å®Ÿè£…ã—ãªã‘ã‚Œã°ãªã‚‰ãªã‹ã£ãŸã‚Šãªã©ã€ã‚ã¾ã‚Šã¨ã£ã¤ãã‚„ã™ã„ã‚‚ã®ã§ã¯ã‚ã‚Šã¾ã›ã‚“ã§ã—ãŸã€‚ ä»Šæ—¥ X/Twitter ã®ã‚¿ã‚¤ãƒ ãƒ©ã‚¤ãƒ³ã§è¦‹ä»˜ã‘ãŸ neco ã¯ã¾ã•ã«ãã‚“ãªæ‚©ã¿ã‚’è§£æ¶ˆã§ãã‚‹ç‰©ã§ã—ãŸã€‚ neco ã¨ã¯ neco ã¯ã‚³ãƒ«ãƒ¼ãƒãƒ³ã‚’ä½¿ã£ãŸéžåŒæœŸ I/O ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã§ã™ã€‚ ã‚³ãƒ«ãƒ¼ãƒãƒ³: é–‹å§‹ã€ã‚¹ãƒªãƒ¼ãƒ—ã€ä¸€æ™‚åœæ¢ã€å†é–‹ã€ç§»è²ã€ãŠã‚ˆã³çµåˆã€‚ åŒæœŸ: ãƒãƒ£ãƒãƒ«ã€ã‚¸ã‚§ãƒãƒ¬ãƒ¼ã‚¿ã€ãƒŸãƒ¥ãƒ¼ãƒ†ãƒƒã‚¯ã‚¹ã€æ¡ä»¶å¤‰æ•°ã€ãŠã‚ˆã³å¾…æ©Ÿã‚°ãƒ«ãƒ¼ãƒ—ã€‚ ãƒ‡ãƒƒãƒ‰ãƒ©ã‚¤ãƒ³ã¨ã‚ãƒ£ãƒ³ã‚»ãƒ«ã®ã‚µãƒãƒ¼ãƒˆã€‚ ãƒ•ã‚¡ã‚¤ãƒ«ãƒ‡ã‚£ã‚¹ã‚¯ãƒªãƒ—ã‚¿ã‚’ä½¿ã£ãŸ Posix ãƒ•ãƒ¬ãƒ³ãƒ‰ãƒªãƒ¼ãªã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ãƒ¼ã‚¹ã€‚ ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã€ã‚·ã‚°ãƒŠãƒ«ã€ãƒ©ãƒ³ãƒ€ãƒ ãƒ‡ãƒ¼ã‚¿ã€ã‚¹ãƒˆãƒªãƒ¼ãƒ ã€ãŠã‚ˆã³ãƒãƒƒãƒ•ã‚¡ä»˜ã I/O ã®è¿½åŠ APIã€‚ å…¬æ£ã‹ã¤æ±ºå®šè«–çš„ãªã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒ©ã‚’å‚™ãˆãŸè»½é‡ãƒ©ãƒ³ã‚¿ã‚¤ãƒ ã€‚ é«˜é€Ÿãªãƒ¦ãƒ¼ã‚¶ãƒ¼ã‚¹ãƒšãƒ¼ã‚¹ã®ã‚³ãƒ³ãƒ†ã‚ã‚¹
Watson 2024/04/11
c

library
ãƒªãƒ³ã‚¯
C23ã®æ–°æ©Ÿèƒ½ï¼šé«˜åº¦ãªãƒ“ãƒƒãƒˆæ“ä½œ<stdbit.h>ã®ç´¹ä»‹
#if __STDC_ENDIAN_NATIVE__ == __STDC_ENDIAN_LITTLE__ // ãƒªãƒˆãƒ«ã‚¨ãƒ³ãƒ‡ã‚£ã‚¢ãƒ³ #elif __STDC_ENDIAN_NATIVE__ == __STDC_ENDIAN_BIG__ // ãƒ“ãƒƒã‚°ã‚¨ãƒ³ãƒ‡ã‚£ã‚¢ãƒ³ #else // ãã®ä»– #endif unsigned int stdc_leading_zeros_uc(unsigned char value) [[unsequenced]]; unsigned int stdc_leading_zeros_us(unsigned short value) [[unsequenced]]; unsigned int stdc_leading_zeros_ui(unsigned int value) [[unsequenced]]; unsigned int stdc_leading_zero
Watson 2024/03/31
c
ãƒªãƒ³ã‚¯
Cppcheck - A tool for static C/C++ code analysis
Packages Cppcheck can also be installed from various package managers; however, you might get an outdated version then. Debian: sudo apt-get install cppcheck Fedora: sudo yum install cppcheck Mac: brew install cppcheck Features Unique code analysis that detect various kinds of bugs in your code. Both command line interface and graphical user interface are available. Cppcheck has a strong focus on
Watson 2024/03/11
c++

c
ãƒªãƒ³ã‚¯
VSCode ã§ clangd ã‚’ä½¿ã£ã¦ã€è³¢ã„C++ã‚¤ãƒ³ãƒ†ãƒªã‚»ãƒ³ã‚¹ç’°å¢ƒã‚’æ•´ãˆã‚‹ - Qiita
Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
Watson 2024/02/24
c

vscode
ãƒªãƒ³ã‚¯
Why Is SQLite Coded In C
Note: Sections 2.0 and 3.0 of this article were added in response to comments on Hacker News and Reddit. Since its inception on 2000-05-29, SQLite has been implemented in generic C. C was and continues to be the best language for implementing a software library like SQLite. There are no plans to recode SQLite in any other programming language at this time. The reasons why C is the best language to
Watson 2023/09/21
c
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A Modern C Development Environment
How Bond Home Built In-House Observability & Why They Switched to Memfault | Wed, October 30th - 9AM PT | 12PM ET | RSVP Sometimes, C/C++ projects have a long development cycle. When working on such a project, it can be easy to take our development environment for granted, and forget about the effort invested in its bring-up. The build environment works like magic, the test framework is neatly int
Watson 2023/08/12
c

c++
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Inferã§Linuxã‚«ãƒ¼ãƒãƒ«ã®ãƒ¡ãƒ¢ãƒªé–¢é€£ã‚¨ãƒ©ãƒ¼ã‚’æ¤œå‡ºã—ã¦ã¿ã‚‹ - VA Linux ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãƒ–ãƒã‚°
1. é™çš„ã‚³ãƒ¼ãƒ‰è§£æž 2. Infer 3. èª¿æŸ»ç’°å¢ƒ 4. Inferã®ãƒ“ãƒ«ãƒ‰ 5. Inferã§è§£æžã§ãã‚‹ã‚ˆã†ã«Linuxã‚«ãƒ¼ãƒãƒ«ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã«å°‘ã—ä¿®æ£ã‚’åŠ ãˆã‚‹ 6. Linuxã‚«ãƒ¼ãƒãƒ«ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã‚’Inferã§æ¤œè¨¼ 7. è§£æžçµæžœã«å¯¾ã™ã‚‹ç²¾æŸ»ã®ä¸€ä¾‹ 7.1. çœŸã®ãƒã‚°ã®ä¾‹ 7.2. ãƒ•ã‚©ãƒ¼ãƒ«ã‚¹ãƒã‚¸ãƒ†ã‚£ãƒ–ã®ä¾‹ 7.3. çœŸã®ãƒã‚°ã‹åˆ¤æ–ã«å›°ã‚‹ã‚‚ã®ã®ä¾‹ 8. çµè«–ã¨ã“ã‚Œã‹ã‚‰ åŸ·ç†è€… : å²¡éƒ¨ ç©¶ 1. é™çš„ã‚³ãƒ¼ãƒ‰è§£æž æ™®æ®µã®é–‹ç™ºã§å“è³ªå‘ä¸Šã•ã›ã‚‹ãŸã‚ã«ã©ã®ã‚ˆã†ãªæ‰‹æ³•ã‚’æŽ¡ç”¨ã•ã‚Œã¦ã„ã‚‹ã§ã—ã‚‡ã†ã‹ã€‚ãŠãã‚‰ããƒ¦ãƒ‹ãƒƒãƒˆãƒ†ã‚¹ãƒˆã‚„çµåˆãƒ†ã‚¹ãƒˆã‚’ä»£è¡¨ã™ã‚‹ãƒ†ã‚¹ãƒˆã‚’ä½¿ã£ã¦ã„ã‚‹ã®ã§ã¯ãªã„ã§ã—ã‚‡ã†ã‹ã€‚ ã“ã®ãƒ†ã‚¹ãƒˆæ‰‹æ³•ã¯ç¾å®Ÿçš„ã§ã™ãŒã–ã£ã¨æŒ™ã’ã‚‹ã ã‘ã§ã‚‚ä»¥ä¸‹ã®èª²é¡ŒãŒã‚ã‚Šã¾ã™: å…¥åŠ›ã¨å‡ºåŠ›ã‚’ãƒ†ã‚¹ãƒˆã‚±ãƒ¼ã‚¹ã¨å‘¼ã°ã‚Œã‚‹ä¾‹ã¨ã—ã¦ä¸Žãˆã‚‹ã®ã§å…¨ã¦ã®å ´åˆã‚’ç¶²ç¾…ã™ã‚‹ã“ã¨ã¯ä¸å¯èƒ½ ãƒ†ã‚¹ãƒˆã®ç¶²ç¾…çŽ‡ã‚’ä¸Šã’ã‚‹ã«ã¯ãƒ¦ãƒ‹ãƒƒãƒˆãƒ†ã‚¹ãƒˆã®ã‚ˆã†ãªå°ã•ã„å˜ä½ã§
Watson 2023/08/07
linux

c
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strlen() ã®æ·±æ·µ - Qiita
ã‚ã‚‰ã¾ã— strlen() ã¨ã„ã†é–¢æ•°ãŒã‚ã‚‹ã€‚å¾¡å˜çŸ¥ã®é€šã‚Šã€æ–‡å—åˆ—ã®é•·ã•ã‚’ç®—å‡ºã™ã‚‹æ¨™æº– C ãƒ©ã‚¤ãƒ–ãƒ©ãƒªã®é–¢æ•°ã ã€‚ ã‚„ã£ã¦ã‚‹ã“ã¨ã¯å˜ç´”ã§ã€ä¾‹ãˆã°ä»¥ä¸‹ã®ã‚ˆã†ã«å®Ÿè£…ã§ãã‚‹ã€‚ size_t strlen_simple(const char* str) { const char* p = str; while (*p) ++p; return size_t(p - str); } '\0' ãŒè¦‹ã¤ã‹ã‚‹ã¾ã§ãƒã‚¤ãƒ³ã‚¿ã‚’é€²ã‚ã€åˆæœŸä½ç½®ã¨ã®å·®åˆ†ã‚’è¿”ã™ã ã‘ã ã€‚ã“ã‚Œã§æ©Ÿèƒ½çš„ã«ã¯ std::strlen() ã¨åŒç‰ã§ã‚ã‚‹ã€‚ ã§ã¯ã€é€Ÿåº¦çš„ã«ã¯ã©ã†ã ã‚ã†ï¼Ÿé©å½“ã«ãƒ™ãƒ³ãƒãƒžãƒ¼ã‚¯ã‚’æ›¸ã„ã¦ MSVC 2022 ã§ã‚³ãƒ³ãƒ‘ã‚¤ãƒ«ï¼†å®Ÿè¡Œã™ã‚‹ã¨ã“ã†ãªã£ãŸã€‚
Watson 2023/08/07
c++

c

simd
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Workarounds for C11 _Generic
Watson 2023/07/31
c
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How to make smaller C and C++ binaries
Watson 2023/05/08
c
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