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String to PChar Conversions

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Long string (AnsiString and UnicodeString) to PChar conversions are not automatic. Some of the differences between strings and PChars can make conversions problematic:

  • Long strings are reference-counted, while PChars are not.
  • Assigning to a string copies the data, while a PChar is a pointer to memory.
  • Long strings are null-terminated and also contain the length of the string and other information, while PChars are simply null-terminated.

Situations in which these differences can cause subtle errors are discussed in the following topics:

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