Our website uses cookies to enhance your browsing experience.
Contents
As defined by the C standard, calling the 'fsetpos' function with an argument obtained not by the 'fgetpos' function leads to undefined behavior.
Consider the following example:
int foo()
{
FILE * pFile;
fpos_t position;
pFile = fopen("file.txt", "w");
memset(&position, 0, sizeof(position));
fputs("That is a sample", pFile);
fsetpos(pFile, &position);
fputs("This", pFile);
fclose(pFile);
return 0;
}Because the value of the 'position' variable was obtained not by the 'fgetpos' function, further program execution may fail.
Fixed code:
int foo()
{
FILE * pFile;
fpos_t position;
pFile = fopen("file.txt", "w");
fgetpos(pFile, &position);
fputs("That is a sample", pFile);
fsetpos(pFile, &position);
fputs("This", pFile);
fclose(pFile);
return 0;
}This diagnostic is classified as:
|
Was this page helpful?
Your message has been sent. We will email you at
If you do not see the email in your inbox, please check if it is filtered to one of the following folders:
Take
a chance!