zip_file_set_comment.c File Reference

#include <stdlib.h>
#include "zipint.h"

Go to the source code of this file.

Functions
ZIP_EXTERN int	zip_file_set_comment (zip_t *za, zip_uint64_t idx, const char *comment, zip_uint16_t len, zip_flags_t flags)

Function Documentation

zip_file_set_comment()

ZIP_EXTERN int zip_file_set_comment	(	zip_t *	za,
		zip_uint64_t	idx,
		const char *	comment,
		zip_uint16_t	len,
		zip_flags_t	flags
	)

Definition at line 41 of file zip_file_set_comment.c.

                                                                                                            {
    zip_entry_t *e;
    zip_string_t *cstr;
    int changed;
 
    if (_zip_get_dirent(za, idx, 0, NULL) == NULL)
        return -1;
 
    if (ZIP_IS_RDONLY(za)) {
        zip_error_set(&za->error, ZIP_ER_RDONLY, 0);
        return -1;
    }
 
    if (len > 0 && comment == NULL) {
        zip_error_set(&za->error, ZIP_ER_INVAL, 0);
        return -1;
    }
 
    if (len > 0) {
        if ((cstr = _zip_string_new((const zip_uint8_t *)comment, len, flags, &za->error)) == NULL)
            return -1;
        if ((flags & ZIP_FL_ENCODING_ALL) == ZIP_FL_ENC_GUESS && _zip_guess_encoding(cstr, ZIP_ENCODING_UNKNOWN) == ZIP_ENCODING_UTF8_GUESSED)
            cstr->encoding = ZIP_ENCODING_UTF8_KNOWN;
    }
    else
        cstr = NULL;
 
    e = za->entry + idx;
 
    if (e->changes) {
        _zip_string_free(e->changes->comment);
        e->changes->comment = NULL;
        e->changes->changed &= ~ZIP_DIRENT_COMMENT;
    }
 
    if (e->orig && e->orig->comment)
        changed = !_zip_string_equal(e->orig->comment, cstr);
    else
        changed = (cstr != NULL);
 
    if (changed) {
        if (e->changes == NULL) {
            if ((e->changes = _zip_dirent_clone(e->orig)) == NULL) {
                zip_error_set(&za->error, ZIP_ER_MEMORY, 0);
                _zip_string_free(cstr);
                return -1;
            }
        }
        e->changes->comment = cstr;
        e->changes->changed |= ZIP_DIRENT_COMMENT;
    }
    else {
        _zip_string_free(cstr);
        if (e->changes && e->changes->changed == 0) {
            _zip_dirent_free(e->changes);
            e->changes = NULL;
        }
    }
 
    return 0;
}

References _zip_dirent_clone(), _zip_dirent_free(), _zip_get_dirent(), _zip_guess_encoding(), _zip_string_equal(), _zip_string_free(), _zip_string_new(), e, zip_string::encoding, zip::entry, zip::error, flags, setup::idx, len, NULL, za, ZIP_DIRENT_COMMENT, ZIP_ENCODING_UNKNOWN, ZIP_ENCODING_UTF8_GUESSED, ZIP_ENCODING_UTF8_KNOWN, ZIP_ER_INVAL, ZIP_ER_MEMORY, ZIP_ER_RDONLY, zip_error_set(), ZIP_FL_ENC_GUESS, ZIP_FL_ENCODING_ALL, and ZIP_IS_RDONLY.

Referenced by set_file_comment(), and zip_set_file_comment().