zip_set_file_compression.c File Reference

#include "zipint.h"

Go to the source code of this file.

Functions
ZIP_EXTERN int	zip_set_file_compression (zip_t *za, zip_uint64_t idx, zip_int32_t method, zip_uint32_t flags)

Function Documentation

zip_set_file_compression()

ZIP_EXTERN int zip_set_file_compression	(	zip_t *	za,
		zip_uint64_t	idx,
		zip_int32_t	method,
		zip_uint32_t	flags
	)

Definition at line 39 of file zip_set_file_compression.c.

                                                                                              {
    zip_entry_t *e;
    zip_int32_t old_method;
 
    if (idx >= za->nentry) {
        zip_error_set(&za->error, ZIP_ER_INVAL, 0);
        return -1;
    }
 
    if (ZIP_IS_RDONLY(za)) {
        zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
        return -1;
    }
 
    if (!zip_compression_method_supported(method, true)) {
        zip_error_set(&za->error, ZIP_ER_COMPNOTSUPP, 0);
        return -1;
    }
 
    e = za->entry + idx;
 
    old_method = (e->orig == NULL ? ZIP_CM_DEFAULT : e->orig->comp_method);
 
    /* TODO: do we want to recompress if level is set? Only if it's
     * different than what bit flags tell us, but those are not
     * defined for all compression methods, or not directly mappable
     * to levels */
 
    if (method == old_method) {
        if (e->changes) {
            e->changes->changed &= ~ZIP_DIRENT_COMP_METHOD;
            e->changes->compression_level = 0;
            if (e->changes->changed == 0) {
                _zip_dirent_free(e->changes);
                e->changes = NULL;
            }
        }
    }
    else {
        if (e->changes == NULL) {
            if ((e->changes = _zip_dirent_clone(e->orig)) == NULL) {
                zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
                return -1;
            }
        }
 
        e->changes->comp_method = method;
        e->changes->compression_level = (zip_uint16_t)flags;
        e->changes->changed |= ZIP_DIRENT_COMP_METHOD;
    }
 
    return 0;
}

References _zip_dirent_clone(), _zip_dirent_free(), e, zip::entry, zip::error, flags, setup::idx, zip::nentry, NULL, za, ZIP_CM_DEFAULT, zip_compression_method_supported(), ZIP_DIRENT_COMP_METHOD, ZIP_ER_COMPNOTSUPP, ZIP_ER_INVAL, ZIP_ER_MEMORY, ZIP_ER_RDONLY, zip_error_set(), and ZIP_IS_RDONLY.

Referenced by set_file_compression().