Determing file size

You should directly query the OS for the file size.
* stat() or fstat()
* GetFileSize()
* something else ?

However, using stdio
* fopen() in binary mode.
* fseek() to the end.
* ftell() returns the current file pointer position.

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[edited by - Fruny on February 15, 2003 3:21:57 PM]

FILE* hFile = fopen("afile", "r");
long lSize = -1;
if (hFile != 0) {
fseek(hFile, 0, SEEK_END);
lSize = ftell(hFile);
fclose(hFile);
}

quote:

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FILE* hFile = fopen("afile", "r");

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This will cause newlines to be expanded (on windows) to carriage return + newline, incorrectly reporting one extra byte for every newlines in the file.

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quote:

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Original post by darookie
FILE* hFile = fopen("afile", "rb+");//is that correct?
long lSize = -1; //why not 0?
if (hFile != 0) {
fseek(hFile, 0, SEEK_END);
lSize = ftell(hFile);
fclose(hFile);
}

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(i adjusted it, the quote)