mirror of
https://github.com/h2non/filetype.git
synced 2025-12-24 11:52:08 +08:00
83 lines
2.1 KiB
Go
83 lines
2.1 KiB
Go
package matchers
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var TypeJpeg = NewType("jpg", "image/jpeg")
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var TypePng = NewType("png", "image/png")
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var TypeGif = NewType("gif", "image/gif")
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var TypeWebp = NewType("webp", "image/webp")
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var TypeCR2 = NewType("cr2", "image/x-canon-cr2")
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var TypeTiff = NewType("tif", "image/tiff")
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var TypeBmp = NewType("bmp", "image/bmp")
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var TypeJxr = NewType("jxr", "image/vnd.ms-photo")
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var TypePsd = NewType("psd", "image/vnd.adobe.photoshop")
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var TypeIco = NewType("ico", "image/x-icon")
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var Image = Map{
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TypeJpeg: Jpeg,
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TypePng: Png,
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TypeGif: Gif,
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TypeWebp: Webp,
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TypeCR2: CR2,
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TypeTiff: Tiff,
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TypeBmp: Bmp,
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TypeJxr: Jxr,
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TypePsd: Psd,
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TypeIco: Ico,
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}
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func Jpeg(buf []byte, length int) bool {
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return length > 2 &&
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buf[0] == 0xFF && buf[1] == 0xD8 && buf[2] == 0xFF
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}
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func Png(buf []byte, length int) bool {
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return length > 3 &&
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buf[0] == 0x89 && buf[1] == 0x50 &&
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buf[2] == 0x4E && buf[3] == 0x47
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}
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func Gif(buf []byte, length int) bool {
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return length > 2 &&
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buf[0] == 0x47 && buf[1] == 0x49 && buf[2] == 0x46
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}
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func Webp(buf []byte, length int) bool {
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return length > 11 &&
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buf[8] == 0x57 && buf[9] == 0x45 &&
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buf[10] == 0x42 && buf[11] == 0x50
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}
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func CR2(buf []byte, length int) bool {
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return length > 9 &&
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((buf[0] == 0x49 && buf[1] == 0x49 && buf[2] == 0x2A && buf[3] == 0x0) ||
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(buf[0] == 0x4D && buf[1] == 0x4D && buf[2] == 0x0 && buf[3] == 0x2A)) &&
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buf[8] == 0x43 && buf[9] == 0x52
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}
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func Tiff(buf []byte, length int) bool {
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return length > 3 &&
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(buf[0] == 0x49 && buf[1] == 0x49 && buf[2] == 0x2A && buf[3] == 0x0) ||
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(buf[0] == 0x4D && buf[1] == 0x4D && buf[2] == 0x0 && buf[3] == 0x2A)
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}
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func Bmp(buf []byte, length int) bool {
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return length > 1 &&
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buf[0] == 0x42 && buf[1] == 0x4D
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}
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func Jxr(buf []byte, length int) bool {
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return length > 2 &&
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buf[0] == 0x49 && buf[1] == 0x49 && buf[2] == 0xBC
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}
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func Psd(buf []byte, length int) bool {
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return length > 3 &&
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buf[0] == 0x38 && buf[1] == 0x42 &&
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buf[2] == 0x50 && buf[3] == 0x53
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}
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func Ico(buf []byte, length int) bool {
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return length > 3 &&
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buf[0] == 0x00 && buf[1] == 0x00 &&
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buf[2] == 0x01 && buf[3] == 0x00
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}
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