generally, the library itself exports a symbol capable of freeing allocated memory...
can you find any reference to a delete function in this lib ? 2011/6/1 Malcolm Poole <malc...@lingua-z.co.uk>: > Working from the instructions in CinFreepascal.pdf ( > ftp://ftp.freepascal.org/pub/fpc/docs-pdf/CinFreePascal.pdf ) I have written > an interface library to the C++ library libtesseract ( > http://code.google.com/p/tesseract-ocr ). > > Everything appears to work well but I am unsure about how to free memory > which has been reserved by a libtesseract function and returned as a result. > The original documentation states that "The calling function must delete [] > after use", but the application crashes with an Access Violation if I try to > free the memory with Dispose or Freemem. I can confirm that the array of > Integer pointed to by the result of tesseract_AllWordConfidences contains > valid data. > > I would be grateful for any help. > > - Malcolm > > ------------- > > Freepascal declaration and code snippet: > function tesseract_AllWordConfidences( APIHandle: TTesseract ): PInteger; > stdcall; external LIBTESSINTF; > > var > conf: PInteger; > FTesseract: TTesseract; > begin > ... > conf := tesseract_AllWordConfidences(FTesseract); > ... > end; > > ==== > > C function, and documentation from C++ baseapi.h > > /** > * Returns all word confidences (between 0 and 100) in an array, terminated > * by -1. The calling function must delete [] after use. > * The number of confidences should correspond to the number of space- > * delimited words in GetUTF8Text. > */ > extern int* EXPORTCALL tesseract_AllWordConfidences(tessHandle APIHandle){ > return APIHandle->AllWordConfidences(); > } > > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-pascal > _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal