115 lines
3.1 KiB
PHP
115 lines
3.1 KiB
PHP
<?php
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namespace nur;
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use nur\b\io\IOException;
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use nur\b\io\SharedFile;
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/**
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* Class file: méthodes outils pour gérer les fichiers avec support des
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* exceptions
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*/
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class file {
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/** générer un nom de fichier temporaire avec le préfixe spécifié */
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static function temp(string $prefix, ?string $tmpdir=null): string {
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if ($tmpdir === null) $tmpdir = sys_get_temp_dir();
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return IOException::ensure_not_false(tempnam($tmpdir, $prefix));
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}
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/** copier le fichier $src sur $dest */
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static function copy(string $src, string $dest, bool $overwrite=true): bool {
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if (!$overwrite && file_exists($dest)) {
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throw new IOException("$dest: fichier existant");
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}
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return IOException::ensure_not_false(copy($src, $dest));
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}
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/** obtenir une instance permettant un accès concurrent au fichier spécifié */
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static function with(string $file): SharedFile {
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return new SharedFile($file);
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}
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/**
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* @param resource $context
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* @return resource
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* @throws IOException
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*/
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static function open(string $filename, string $mode, bool $use_include_path=false, $context=null) {
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return IOException::ensure_not_false(fopen($filename, $mode, $use_include_path, $context));
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}
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/**
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* @param resource $stream
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* @throws IOException
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*/
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static function tell($stream): int {
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return IOException::ensure_not_false(ftell($stream));
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}
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/**
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* @param resource $stream
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* @return int la position après avoir déplacé le pointeur
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* @throws IOException
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*/
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static function seek($stream, int $offset, int $whence=SEEK_SET): int {
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$r = fseek($stream, $offset, $whence);
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if ($r == -1) throw IOException::error();
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return self::tell($stream);
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}
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/**
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* @param resource $stream
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* @throws IOException
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*/
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static function read($stream, int $length): string {
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return IOException::ensure_not_false(fread($stream, $length));
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}
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/**
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* @param resource $stream
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* @throws IOException
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*/
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static function fgets($stream, ?int $length=null): string {
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return IOException::ensure_not_false(fgets($stream, $length));
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}
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/**
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* à partir de la position $pos, trouver le premier caractère \n et retourner
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* la position juste après
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*/
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static function find_nl($stream, int $pos): int {
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self::seek($stream, $pos, SEEK_SET);
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while (true) {
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$data = self::read($stream, 512);
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if ($data === "") return $pos + 1;
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$nlpos = strpos($data, "\n");
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if ($nlpos !== false) {
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$pos += $nlpos + 1;
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break;
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} else {
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$pos += strlen($data);
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}
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}
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return $pos;
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}
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/**
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* @param resource $stream
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* @throws IOException
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*/
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static function write($stream, string $data, ?int $length=null): int {
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if ($length === null) $result = fwrite($stream, $data);
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else $result = fwrite($stream, $data, $length);
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return IOException::ensure_not_false($result);
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}
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/**
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* @param resource $stream
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* @throws IOException
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*/
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static function close($stream, bool $throw=false): bool {
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$closed = fclose($stream);
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if ($closed || !$throw) return $closed;
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else throw IOException::error();
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}
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}
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