Open C/C++: 使用正则表达式的缓慢问题

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文章信息

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兼容于

平台: S60 3rd Edition (initial release), FP1, FP2

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文章

翻译:

翻译自: Archived:Compiling some regular expressions is slow using Open C/C++ on S60 3rd Edition devices (Known Issue)

由 hoolee

最后由 hamishwillee 在 13 Aug 2012 编辑

• 详细描述

当使用regex.h的regcomp方法编译某个正则表达式时会出现慢的情况：

  regex_t preg;
  char* str = "192.168.1.123";
  char* pattern = "([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})";
 
  int rc;
  size_t nmatch = 5;
  regmatch_t pmatch[5];
 
  //the next line will take 30-60 seconds to evaluate 
  if (0 != (rc = regcomp(&preg, pattern, REG_EXTENDED ))) 
  {
  printf("Regular expression compiling failed");
  int c = getchar();
  return false;
  }

解决方案 最新版本的Open C/C++插件修正了这一问题