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V817. It is more efficient to search fo…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V817. It is more efficient to search for 'X' character rather than a string.

Nov 16 2016

The analyzer detected a function that looks for a character in a string and can be optimized.

Consider the following example of inefficient code:

bool isSharpPresent(const std::string& str)
{
  return str.find("#") != std::string::npos;
}

In this code, it is better to use an overridden version of the 'find()' function that receives a character instead of a string.

Optimized code:

bool isSharpPresent(const std::string& str)
{
  return str.find('#') != std::string::npos;
}

The following example also uses inefficient code that can be optimized:

const char* GetSharpSubStr(const char* str)
{
  return strstr(str, "#");
}

In this code, it is better to use the function 'strchr()' to search for a character instead of a string:

const char* GetSharpSubStr(const char* str)
{
  return strchr(str, '#');
}
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