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  1.  
  2. #include <string>
  3. #include <vector>
  4. #include <iostream>
  5. #include <stdlib.h>
  6. class StringUtilities {
  7. public:
  8. 	typedef std::vector<std::string> Strings;
  9. 	static std::string GetEnvVariable(const std::string& var) {
  10. 		std::string ret;
  11. #ifdef WIN32
  12. 		char *pValue = NULL;
  13. 		size_t len;
  14. 		errno_t err = _dupenv_s(&pValue, &len, var.c_str());
  15. 		if (!pValue || err) {
  16. 			return ret;
  17. 		}
  18. 		ret = pValue;
  19. 		free(pValue);
  20. #else
  21. 		const char* pValue = getenv(var.c_str());
  22. 		if (pValue) {
  23. 			ret = pValue;
  24. 		}
  25. #endif
  26. 		return ret;
  27. 	}
  28. 	static std::string ExpandEnviornmentVariable(const std::string& s) {
  29. 		std::size_t start = s.find("${");
  30. 		std::size_t lastEnd = 0;
  31. 		std::string ret;
  32. 		while (start != std::string::npos) {
  33. 			std::size_t end = s.find("}", start + 2);
  34. 			if (end == std::string::npos) {
  35. 				break;
  36. 			}
  37. 			ret.append(s.substr(lastEnd, start - lastEnd));
  38. 			ret.append(GetEnvVariable(s.substr(start + 2, end - start - 2)));
  39. 			lastEnd = end + 1;
  40. 			start = s.find("${", lastEnd);
  41. 		}
  42. 		ret.append(s.substr(lastEnd));
  43. 		return ret;
  44. 	}
  45. 	static Strings Split(const std::string& str, const std::string& delim, bool bCompress = true) {
  46. 		std::size_t start = 0;
  47. 		std::size_t found = str.find_first_of(delim, start);
  48. 		Strings ret;
  49. 		while (found != std::string::npos) {
  50. 			if (start < found || bCompress == false) {
  51. 				ret.push_back(str.substr(start, found - start));
  52. 			}
  53. 			start = found + 1;
  54. 			found = str.find_first_of(delim, start);
  55. 		}
  56. 		std::string ins(str.begin() + start, str.end());
  57. 		if (start < str.length()) {
  58. 			ret.push_back(str.substr(start));
  59. 		}
  60. 		return ret;
  61. 	}
  62. 	static std::string Replace(const std::string& str, const std::string& from, const std::string to, int occurence = 0, bool every = false) {
  63. 		typedef std::string::size_type(std::string::*pFind)(const std::string& str, std::string::size_type pos) const;
  64. 		pFind find = &std::string::find;
  65. 		std::size_t start = 0;
  66. 		int inc = 1, count = 0;
  67. 		std::string ret = str;
  68. 		if (occurence < 0)
  69. 		{
  70. 			find = &std::string::rfind;
  71. 			start = str.length();
  72. 			inc = -1;
  73. 			occurence *= -1;
  74. 		}
  75. 		std::size_t found = ((ret).*(find))(from, start);
  76. 		while (found != std::string::npos)
  77. 		{
  78. 			count++;
  79. 			if (count == occurence || occurence == 0)
  80. 			{
  81. 				ret.replace(found, from.length(), to);
  82. 				if (occurence != 0 && !every) {
  83. 					return ret;
  84. 				}
  85. 				else if (every) {
  86. 					count = 0;
  87. 					std::cout << "count = " << count << std::endl;
  88. 				}
  89. 			}
  90. 				std::cout << "Replacing count = " << count << " start = " << start << " foudn =" << found << std::endl;
  91. 			start = found + (from.length()*inc);
  92. 			found = ((ret).*(find))(from, start);
  93. 		}
  94. 		return ret;
  95. 	}
  96. };
  97. int main() {
  98. 	StringUtilities::Strings test;
  99. 	std::string str;
  100. 	str = "|Abcd|${test}:blah|||${path}|bbb|sdf|${pathext}|${TEMP}";
  101. 	std::cout << "=======" << str << std::endl;
  102. 	str = StringUtilities::ExpandEnviornmentVariable(str);
  103. 	std::cout << "=======" << str << std::endl;
  104. 	test = StringUtilities::Split(str, ";|");
  105. 	for (StringUtilities::Strings::iterator it = test.begin(); it != test.end(); it++) {
  106. 		std::cout << *it << std::endl;
  107. 	}
  108. 	str = "test";
  109. 	test = StringUtilities::Split(str, ";");
  110. 	std::cout << "=======" << str << std::endl;
  111. 	for (StringUtilities::Strings::iterator it = test.begin(); it != test.end(); it++) {
  112. 		std::cout << *it << std::endl;
  113. 	}
  114. 	str = "";
  115. 	test = StringUtilities::Split(str, ";");
  116. 	std::cout << "=======" << str << std::endl;
  117. 	for (StringUtilities::Strings::iterator it = test.begin(); it != test.end(); it++) {
  118. 		std::cout << *it << std::endl;
  119. 	}
  120. 	str = ":::;;;;;:::::";
  121. 	test = StringUtilities::Split(str, ";");
  122. 	std::cout << "=======" << str << std::endl;
  123. 	for (StringUtilities::Strings::iterator it = test.begin(); it != test.end(); it++) {
  124. 		std::cout << *it << std::endl;
  125. 	}
  126. 	str = "test;;;;";
  127. 	test = StringUtilities::Split(str, ";");
  128. 	std::cout << "=======" <<  str << std::endl;
  129. 	for (StringUtilities::Strings::iterator it = test.begin(); it != test.end(); it++) {
  130. 		std::cout << *it << std::endl;
  131. 	}
  132.  
  133. 	str = "|Abcd|${test}:blah|||${test}|bbb|sdf|${test}|${test}";
  134. 	std::cout << "=======" << StringUtilities::Replace(str, "dddd", "") << std::endl;
  135. 	std::cout << "ReplaceALL " << StringUtilities::Replace(str, "${test}", "Sanjay") << std::endl;
  136. 	std::cout << "StringUtilities::Replace 1 " << StringUtilities::Replace(str, "${test}", "Sanjay", 1) << std::endl;
  137. 	std::cout << "StringUtilities::Replace 2 " << StringUtilities::Replace(str, "${test}", "Sanjay", 2) << std::endl;
  138. 	std::cout << "StringUtilities::Replace 3 " << StringUtilities::Replace(str, "${test}", "Sanjay", 3) << std::endl;
  139. 	std::cout << "StringUtilities::Replace 4 " << StringUtilities::Replace(str, "${test}", "Sanjay", 4) << std::endl;
  140. 	std::cout << "StringUtilities::Replace -1 " << StringUtilities::Replace(str, "${test}", "Sanjay", -1) << std::endl;
  141. 	std::cout << "StringUtilities::Replace -2 " << StringUtilities::Replace(str, "${test}", "Sanjay", -2) << std::endl;
  142. 	std::cout << "StringUtilities::Replace -3 " << StringUtilities::Replace(str, "${test}", "Sanjay", -3) << std::endl;
  143. 	std::cout << "StringUtilities::Replace -4 " << StringUtilities::Replace(str, "${test}", "Sanjay", -4) << std::endl;
  144.  
  145. 	std::cout << "StringUtilities::Replace 1 " << StringUtilities::Replace(str, "${test}", "Sanjay", 1, true) << std::endl;
  146. 	std::cout << "StringUtilities::Replace 2 " << StringUtilities::Replace(str, "${test}", "Sanjay", 2, true) << std::endl;
  147. 	std::cout << "StringUtilities::Replace 3 " << StringUtilities::Replace(str, "${test}", "Sanjay", 3, true) << std::endl;
  148. 	std::cout << "StringUtilities::Replace 4 " << StringUtilities::Replace(str, "${test}", "Sanjay", 4, true) << std::endl;
  149. 	std::cout << "StringUtilities::Replace -1 " << StringUtilities::Replace(str, "${test}", "Sanjay", -1, true) << std::endl;
  150. 	std::cout << "StringUtilities::Replace -2 " << StringUtilities::Replace(str, "${test}", "Sanjay", -2, true) << std::endl;
  151. 	std::cout << "StringUtilities::Replace -3 " << StringUtilities::Replace(str, "${test}", "Sanjay", -3, true) << std::endl;
  152. 	std::cout << "StringUtilities::Replace -4 " << StringUtilities::Replace(str, "${test}", "Sanjay", -4, true) << std::endl;
  153. }
  154.  
Success #stdin #stdout 0s 3476KB
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stdin
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Standard input is empty
stdout
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=======|Abcd|${test}:blah|||${path}|bbb|sdf|${pathext}|${TEMP}
=======|Abcd|:blah||||bbb|sdf||
Abcd
:blah
bbb
sdf
=======test
test
=======
=======:::;;;;;:::::
:::
:::::
=======test;;;;
test
=======|Abcd|${test}:blah|||${test}|bbb|sdf|${test}|${test}
Replacing count = 1 start = 0 foudn =6
Replacing count = 2 start = 13 foudn =20
Replacing count = 3 start = 27 foudn =35
Replacing count = 4 start = 42 foudn =42
ReplaceALL |Abcd|Sanjay:blah|||Sanjay|bbb|sdf|Sanjay|Sanjay
StringUtilities::Replace 1 |Abcd|Sanjay:blah|||${test}|bbb|sdf|${test}|${test}
Replacing count = 1 start = 0 foudn =6
StringUtilities::Replace 2 |Abcd|${test}:blah|||Sanjay|bbb|sdf|${test}|${test}
Replacing count = 1 start = 0 foudn =6
Replacing count = 2 start = 13 foudn =21
StringUtilities::Replace 3 |Abcd|${test}:blah|||${test}|bbb|sdf|Sanjay|${test}
Replacing count = 1 start = 0 foudn =6
Replacing count = 2 start = 13 foudn =21
Replacing count = 3 start = 28 foudn =37
StringUtilities::Replace 4 |Abcd|${test}:blah|||${test}|bbb|sdf|${test}|Sanjay
StringUtilities::Replace -1 |Abcd|${test}:blah|||${test}|bbb|sdf|${test}|Sanjay
Replacing count = 1 start = 52 foudn =45
StringUtilities::Replace -2 |Abcd|${test}:blah|||${test}|bbb|sdf|Sanjay|${test}
Replacing count = 1 start = 52 foudn =45
Replacing count = 2 start = 38 foudn =37
StringUtilities::Replace -3 |Abcd|${test}:blah|||Sanjay|bbb|sdf|${test}|${test}
Replacing count = 1 start = 52 foudn =45
Replacing count = 2 start = 38 foudn =37
Replacing count = 3 start = 30 foudn =21
StringUtilities::Replace -4 |Abcd|Sanjay:blah|||${test}|bbb|sdf|${test}|${test}
count = 0
Replacing count = 0 start = 0 foudn =6
count = 0
Replacing count = 0 start = 13 foudn =20
count = 0
Replacing count = 0 start = 27 foudn =35
count = 0
Replacing count = 0 start = 42 foudn =42
StringUtilities::Replace 1 |Abcd|Sanjay:blah|||Sanjay|bbb|sdf|Sanjay|Sanjay
Replacing count = 1 start = 0 foudn =6
count = 0
Replacing count = 0 start = 13 foudn =21
Replacing count = 1 start = 28 foudn =36
count = 0
Replacing count = 0 start = 43 foudn =44
StringUtilities::Replace 2 |Abcd|${test}:blah|||Sanjay|bbb|sdf|${test}|Sanjay
Replacing count = 1 start = 0 foudn =6
Replacing count = 2 start = 13 foudn =21
count = 0
Replacing count = 0 start = 28 foudn =37
Replacing count = 1 start = 44 foudn =44
StringUtilities::Replace 3 |Abcd|${test}:blah|||${test}|bbb|sdf|Sanjay|${test}
Replacing count = 1 start = 0 foudn =6
Replacing count = 2 start = 13 foudn =21
Replacing count = 3 start = 28 foudn =37
count = 0
Replacing count = 0 start = 44 foudn =45
StringUtilities::Replace 4 |Abcd|${test}:blah|||${test}|bbb|sdf|${test}|Sanjay
count = 0
Replacing count = 0 start = 52 foudn =45
count = 0
Replacing count = 0 start = 38 foudn =37
count = 0
Replacing count = 0 start = 30 foudn =21
count = 0
Replacing count = 0 start = 14 foudn =6
StringUtilities::Replace -1 |Abcd|Sanjay:blah|||Sanjay|bbb|sdf|Sanjay|Sanjay
Replacing count = 1 start = 52 foudn =45
count = 0
Replacing count = 0 start = 38 foudn =37
Replacing count = 1 start = 30 foudn =21
count = 0
Replacing count = 0 start = 14 foudn =6
Replacing count = 1 start = 4294967295 foudn =43
count = 0
Replacing count = 0 start = 36 foudn =20
StringUtilities::Replace -2 |Abcd|Sanjay:blah|||Sanjay|bbb|sdf|Sanjay|${test}
Replacing count = 1 start = 52 foudn =45
Replacing count = 2 start = 38 foudn =37
count = 0
Replacing count = 0 start = 30 foudn =21
Replacing count = 1 start = 14 foudn =6
Replacing count = 2 start = 4294967295 foudn =44
count = 0
Replacing count = 0 start = 37 foudn =36
Replacing count = 1 start = 29 foudn =6
Replacing count = 2 start = 4294967295 foudn =43
count = 0
Replacing count = 0 start = 36 foudn =6
Replacing count = 1 start = 4294967295 foudn =42
StringUtilities::Replace -3 |Abcd|Sanjay:blah|||Sanjay|bbb|sdf|Sanjay|${test}
Replacing count = 1 start = 52 foudn =45
Replacing count = 2 start = 38 foudn =37
Replacing count = 3 start = 30 foudn =21
count = 0
Replacing count = 0 start = 14 foudn =6
Replacing count = 1 start = 4294967295 foudn =44
Replacing count = 2 start = 37 foudn =36
Replacing count = 3 start = 29 foudn =20
StringUtilities::Replace -4 |Abcd|Sanjay:blah|||${test}|bbb|sdf|${test}|${test}
https://ideone.com/iM3JMG
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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