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[2020-01-21 22:04 UTC] flip101 at gmail dot com
Description: ------------ On example #5 in https://www.php.net/manual/en/ffi.examples-basic.php it says "work with it like with a regular PHP array". But when i assign values directly $a = [1, 2, 3, 4]; The type seems to change from `FFI\CData` to PHP `array`. It would be useful to have an array copy method so a copy loop (which seems?? the only way for the moment) doesn't need to be done in php itself. Although pack() could be used as well, but is that the best way? PatchesPull RequestsHistoryAllCommentsChangesGit/SVN commits
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Last updated: Thu Nov 21 22:01:28 2024 UTC |
I wrote this piece of code, not saying it's the best. But perhaps some of the logic here is better implemented in C. function arrayCreate(string $type, array $source) { $size = count($source); if ('char' === $type) { $format = 'c'; $bytes_multiplier = 1; } elseif ('unsigned char' === $type) { $format = 'C'; $bytes_multiplier = 1; } elseif ('short' === $type) { $format = 's'; $bytes_multiplier = 2; } elseif ('unsigned short' === $type) { $format = 'S'; $bytes_multiplier = 2; } elseif ('int' === $type) { $format = 'i'; $bytes_multiplier = 4; // assumption: https://stackoverflow.com/a/11438838/1833322 } elseif ('unsigned int' === $type) { $format = 'I'; $bytes_multiplier = 4; } elseif ('long' === $type) { $format = 'l'; $bytes_multiplier = 4; } elseif ('unsigned long' === $type) { $format = 'L'; $bytes_multiplier = 4; } elseif ('long long' === $type) { $format = 'q'; $bytes_multiplier = 8; } elseif ('unsigned long long' === $type) { $format = 'Q'; $bytes_multiplier = 8; } elseif ('float' === $type) { $format = 'f'; $bytes_multiplier = 4; } elseif ('double' === $type) { $format = 'd'; $bytes_multiplier = 8; } else { throw new \InvalidArgumentException('type'); } $first_type = gettype(reset($source)); if (! array_reduce($source, function($c, $i) use ($first_type) { return $c && gettype($i) === $first_type; }, true)) { throw new \InvalidArgumentException('source'); } $array = FFI::new($type . '[' . $size . ']'); FFI::memcpy($array, pack($format . '*', ...$source), $size * $bytes_multiplier); return $array; }