[no subject]

Hence my new proposal:

+ Note #1: when reading a packfile (or a sub-chunk of a packfile), you must
+ make sure you set the right password (including none) before opening it;
+ you can change the password to whatever you want afterwards without
+ affecting the read operation. On the contrary, when writing a packfile (or
+ a sub-chunk of a packfile), you must make sure that the password that was
+ active at the time the packfile (or the sub-chunk respectively) was opened
+ is still active before closing the packfile (or the sub-chunk respectively).
+ This is guaranteed to be true if you didn't call the packfile_password()
+ routine in the meantime.

+ Note #2: as explained above, the password is used for all read/write
+ operations on files, including for several functions of the library that
+ operate on files without explicitly using packfiles, e.g load_bitmap().
+ The unencrypted mode is mandatory in order for those functions to work.
+ Therefore remember to call packfile_password(NULL) before using them
+ if you previously changed the password. As a rule of thumb, always call
+ packfile_password(NULL) when you are done with operations on packfiles.

--
Eric Botcazou
ebotcazou@xxxxxxxxxx

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	name="passwd.c"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
	filename="passwd.c"

#include <allegro.h>

void qwrite(void)
{
    PACKFILE *f;

    f = pack_fopen("testing","w");
    packfile_password("mypassword");
    pack_fputs("(this is a string)", f);
    packfile_password(NULL); /* *** */
    pack_fclose(f);
}

void qread(void)
{
    PACKFILE *f;
    char buf[128];

    f = pack_fopen("testing","r");
    packfile_password("mypassword");
    pack_fgets(buf, 128, f);
    pack_fclose(f);
    printf("%s\n",buf);
}

int main(void)
{
    allegro_init();
    qwrite();
    qread();
    return 0;
}

END_OF_MAIN()

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