How to use formatError method of td Package

Best Go-testdeep code snippet using td.formatError

scan.go

Source:scan.go

1// Copyright 2012 The Go Authors. All rights reserved.2// Use of this source code is governed by a BSD-style3// license that can be found in the LICENSE file.4package jpeg5import (6	"image"7)8// makeImg allocates and initializes the destination image.9func (d *decoder) makeImg(h0, v0, mxx, myy int) {10	if d.nComp == nGrayComponent {11		m := image.NewGray(image.Rect(0, 0, 8*mxx, 8*myy))12		d.img1 = m.SubImage(image.Rect(0, 0, d.width, d.height)).(*image.Gray)13		return14	}15	var subsampleRatio image.YCbCrSubsampleRatio16	switch {17	case h0 == 1 && v0 == 1:18		subsampleRatio = image.YCbCrSubsampleRatio44419	case h0 == 1 && v0 == 2:20		subsampleRatio = image.YCbCrSubsampleRatio44021	case h0 == 2 && v0 == 1:22		subsampleRatio = image.YCbCrSubsampleRatio42223	case h0 == 2 && v0 == 2:24		subsampleRatio = image.YCbCrSubsampleRatio42025	default:26		panic("unreachable")27	}28	m := image.NewYCbCr(image.Rect(0, 0, 8*h0*mxx, 8*v0*myy), subsampleRatio)29	d.img3 = m.SubImage(image.Rect(0, 0, d.width, d.height)).(*image.YCbCr)30}31// Specified in section B.2.3.32func (d *decoder) processSOS(n int) error {33	if d.nComp == 0 {34		return FormatError("missing SOF marker")35	}36	if n < 6 || 4+2*d.nComp < n || n%2 != 0 {37		return FormatError("SOS has wrong length")38	}39	if err := d.readFull(d.tmp[:n]); err != nil {40		return err41	}42	nComp := int(d.tmp[0])43	if n != 4+2*nComp {44		return FormatError("SOS length inconsistent with number of components")45	}46	var scan [nColorComponent]struct {47		compIndex uint848		td        uint8 // DC table selector.49		ta        uint8 // AC table selector.50	}51	for i := 0; i < nComp; i++ {52		cs := d.tmp[1+2*i] // Component selector.53		compIndex := -154		for j, comp := range d.comp {55			if cs == comp.c {56				compIndex = j57			}58		}59		if compIndex < 0 {60			return FormatError("unknown component selector")61		}62		scan[i].compIndex = uint8(compIndex)63		scan[i].td = d.tmp[2+2*i] >> 464		if scan[i].td > maxTh {65			return FormatError("bad Td value")66		}67		scan[i].ta = d.tmp[2+2*i] & 0x0f68		if scan[i].ta > maxTh {69			return FormatError("bad Ta value")70		}71	}72	// zigStart and zigEnd are the spectral selection bounds.73	// ah and al are the successive approximation high and low values.74	// The spec calls these values Ss, Se, Ah and Al.75	//76	// For progressive JPEGs, these are the two more-or-less independent77	// aspects of progression. Spectral selection progression is when not78	// all of a block's 64 DCT coefficients are transmitted in one pass.79	// For example, three passes could transmit coefficient 0 (the DC80	// component), coefficients 1-5, and coefficients 6-63, in zig-zag81	// order. Successive approximation is when not all of the bits of a82	// band of coefficients are transmitted in one pass. For example,83	// three passes could transmit the 6 most significant bits, followed84	// by the second-least significant bit, followed by the least85	// significant bit.86	//87	// For baseline JPEGs, these parameters are hard-coded to 0/63/0/0.88	zigStart, zigEnd, ah, al := int32(0), int32(blockSize-1), uint32(0), uint32(0)89	if d.progressive {90		zigStart = int32(d.tmp[1+2*nComp])91		zigEnd = int32(d.tmp[2+2*nComp])92		ah = uint32(d.tmp[3+2*nComp] >> 4)93		al = uint32(d.tmp[3+2*nComp] & 0x0f)94		if (zigStart == 0 && zigEnd != 0) || zigStart > zigEnd || blockSize <= zigEnd {95			return FormatError("bad spectral selection bounds")96		}97		if zigStart != 0 && nComp != 1 {98			return FormatError("progressive AC coefficients for more than one component")99		}100		if ah != 0 && ah != al+1 {101			return FormatError("bad successive approximation values")102		}103	}104	// mxx and myy are the number of MCUs (Minimum Coded Units) in the image.105	h0, v0 := d.comp[0].h, d.comp[0].v // The h and v values from the Y components.106	mxx := (d.width + 8*h0 - 1) / (8 * h0)107	myy := (d.height + 8*v0 - 1) / (8 * v0)108	if d.img1 == nil && d.img3 == nil {109		d.makeImg(h0, v0, mxx, myy)110	}111	if d.progressive {112		for i := 0; i < nComp; i++ {113			compIndex := scan[i].compIndex114			if d.progCoeffs[compIndex] == nil {115				d.progCoeffs[compIndex] = make([]block, mxx*myy*d.comp[compIndex].h*d.comp[compIndex].v)116			}117		}118	}119	d.bits = bits{}120	mcu, expectedRST := 0, uint8(rst0Marker)121	var (122		// b is the decoded coefficients, in natural (not zig-zag) order.123		b  block124		dc [nColorComponent]int32125		// bx and by are the location of the current (in terms of 8x8 blocks).126		// For example, with 4:2:0 chroma subsampling, the block whose top left127		// pixel co-ordinates are (16, 8) is the third block in the first row:128		// bx is 2 and by is 0, even though the pixel is in the second MCU.129		bx, by     int130		blockCount int131	)132	for my := 0; my < myy; my++ {133		for mx := 0; mx < mxx; mx++ {134			for i := 0; i < nComp; i++ {135				compIndex := scan[i].compIndex136				qt := &d.quant[d.comp[compIndex].tq]137				for j := 0; j < d.comp[compIndex].h*d.comp[compIndex].v; j++ {138					// The blocks are traversed one MCU at a time. For 4:2:0 chroma139					// subsampling, there are four Y 8x8 blocks in every 16x16 MCU.140					//141					// For a baseline 32x16 pixel image, the Y blocks visiting order is:142					//	0 1 4 5143					//	2 3 6 7144					//145					// For progressive images, the interleaved scans (those with nComp > 1)146					// are traversed as above, but non-interleaved scans are traversed left147					// to right, top to bottom:148					//	0 1 2 3149					//	4 5 6 7150					// Only DC scans (zigStart == 0) can be interleaved. AC scans must have151					// only one component.152					//153					// To further complicate matters, for non-interleaved scans, there is no154					// data for any blocks that are inside the image at the MCU level but155					// outside the image at the pixel level. For example, a 24x16 pixel 4:2:0156					// progressive image consists of two 16x16 MCUs. The interleaved scans157					// will process 8 Y blocks:158					//	0 1 4 5159					//	2 3 6 7160					// The non-interleaved scans will process only 6 Y blocks:161					//	0 1 2162					//	3 4 5163					if nComp != 1 {164						bx, by = d.comp[compIndex].h*mx, d.comp[compIndex].v*my165						if h0 == 1 {166							by += j167						} else {168							bx += j % 2169							by += j / 2170						}171					} else {172						q := mxx * d.comp[compIndex].h173						bx = blockCount % q174						by = blockCount / q175						blockCount++176						if bx*8 >= d.width || by*8 >= d.height {177							continue178						}179					}180					// Load the previous partially decoded coefficients, if applicable.181					if d.progressive {182						b = d.progCoeffs[compIndex][by*mxx*d.comp[compIndex].h+bx]183					} else {184						b = block{}185					}186					if ah != 0 {187						if err := d.refine(&b, &d.huff[acTable][scan[i].ta], zigStart, zigEnd, 1<<al); err != nil {188							return err189						}190					} else {191						zig := zigStart192						if zig == 0 {193							zig++194							// Decode the DC coefficient, as specified in section F.2.2.1.195							value, err := d.decodeHuffman(&d.huff[dcTable][scan[i].td])196							if err != nil {197								return err198							}199							if value > 16 {200								return UnsupportedError("excessive DC component")201							}202							dcDelta, err := d.receiveExtend(value)203							if err != nil {204								return err205							}206							dc[compIndex] += dcDelta207							b[0] = dc[compIndex] << al208						}209						if zig <= zigEnd && d.eobRun > 0 {210							d.eobRun--211						} else {212							// Decode the AC coefficients, as specified in section F.2.2.2.213							huff := &d.huff[acTable][scan[i].ta]214							for ; zig <= zigEnd; zig++ {215								value, err := d.decodeHuffman(huff)216								if err != nil {217									return err218								}219								val0 := value >> 4220								val1 := value & 0x0f221								if val1 != 0 {222									zig += int32(val0)223									if zig > zigEnd {224										break225									}226									ac, err := d.receiveExtend(val1)227									if err != nil {228										return err229									}230									b[unzig[zig]] = ac << al231								} else {232									if val0 != 0x0f {233										d.eobRun = uint16(1 << val0)234										if val0 != 0 {235											bits, err := d.decodeBits(int32(val0))236											if err != nil {237												return err238											}239											d.eobRun |= uint16(bits)240										}241										d.eobRun--242										break243									}244									zig += 0x0f245								}246							}247						}248					}249					if d.progressive {250						if zigEnd != blockSize-1 || al != 0 {251							// We haven't completely decoded this 8x8 block. Save the coefficients.252							d.progCoeffs[compIndex][by*mxx*d.comp[compIndex].h+bx] = b253							// At this point, we could execute the rest of the loop body to dequantize and254							// perform the inverse DCT, to save early stages of a progressive image to the255							// *image.YCbCr buffers (the whole point of progressive encoding), but in Go,256							// the jpeg.Decode function does not return until the entire image is decoded,257							// so we "continue" here to avoid wasted computation.258							continue259						}260					}261					// Dequantize, perform the inverse DCT and store the block to the image.262					for zig := 0; zig < blockSize; zig++ {263						b[unzig[zig]] *= qt[zig]264					}265					idct(&b)266					dst, stride := []byte(nil), 0267					if d.nComp == nGrayComponent {268						dst, stride = d.img1.Pix[8*(by*d.img1.Stride+bx):], d.img1.Stride269					} else {270						switch compIndex {271						case 0:272							dst, stride = d.img3.Y[8*(by*d.img3.YStride+bx):], d.img3.YStride273						case 1:274							dst, stride = d.img3.Cb[8*(by*d.img3.CStride+bx):], d.img3.CStride275						case 2:276							dst, stride = d.img3.Cr[8*(by*d.img3.CStride+bx):], d.img3.CStride277						default:278							return UnsupportedError("too many components")279						}280					}281					// Level shift by +128, clip to [0, 255], and write to dst.282					for y := 0; y < 8; y++ {283						y8 := y * 8284						yStride := y * stride285						for x := 0; x < 8; x++ {286							c := b[y8+x]287							if c < -128 {288								c = 0289							} else if c > 127 {290								c = 255291							} else {292								c += 128293							}294							dst[yStride+x] = uint8(c)295						}296					}297				} // for j298			} // for i299			mcu++300			if d.ri > 0 && mcu%d.ri == 0 && mcu < mxx*myy {301				// A more sophisticated decoder could use RST[0-7] markers to resynchronize from corrupt input,302				// but this one assumes well-formed input, and hence the restart marker follows immediately.303				if err := d.readFull(d.tmp[:2]); err != nil {304					return err305				}306				if d.tmp[0] != 0xff || d.tmp[1] != expectedRST {307					return FormatError("bad RST marker")308				}309				expectedRST++310				if expectedRST == rst7Marker+1 {311					expectedRST = rst0Marker312				}313				// Reset the Huffman decoder.314				d.bits = bits{}315				// Reset the DC components, as per section F.2.1.3.1.316				dc = [nColorComponent]int32{}317				// Reset the progressive decoder state, as per section G.1.2.2.318				d.eobRun = 0319			}320		} // for mx321	} // for my322	return nil323}324// refine decodes a successive approximation refinement block, as specified in325// section G.1.2.326func (d *decoder) refine(b *block, h *huffman, zigStart, zigEnd, delta int32) error {327	// Refining a DC component is trivial.328	if zigStart == 0 {329		if zigEnd != 0 {330			panic("unreachable")331		}332		bit, err := d.decodeBit()333		if err != nil {334			return err335		}336		if bit {337			b[0] |= delta338		}339		return nil340	}341	// Refining AC components is more complicated; see sections G.1.2.2 and G.1.2.3.342	zig := zigStart343	if d.eobRun == 0 {344	loop:345		for ; zig <= zigEnd; zig++ {346			z := int32(0)347			value, err := d.decodeHuffman(h)348			if err != nil {349				return err350			}351			val0 := value >> 4352			val1 := value & 0x0f353			switch val1 {354			case 0:355				if val0 != 0x0f {356					d.eobRun = uint16(1 << val0)357					if val0 != 0 {358						bits, err := d.decodeBits(int32(val0))359						if err != nil {360							return err361						}362						d.eobRun |= uint16(bits)363					}364					break loop365				}366			case 1:367				z = delta368				bit, err := d.decodeBit()369				if err != nil {370					return err371				}372				if !bit {373					z = -z374				}375			default:376				return FormatError("unexpected Huffman code")377			}378			zig, err = d.refineNonZeroes(b, zig, zigEnd, int32(val0), delta)379			if err != nil {380				return err381			}382			if zig > zigEnd {383				return FormatError("too many coefficients")384			}385			if z != 0 {386				b[unzig[zig]] = z387			}388		}389	}390	if d.eobRun > 0 {391		d.eobRun--392		if _, err := d.refineNonZeroes(b, zig, zigEnd, -1, delta); err != nil {393			return err394		}395	}396	return nil397}398// refineNonZeroes refines non-zero entries of b in zig-zag order. If nz >= 0,399// the first nz zero entries are skipped over.400func (d *decoder) refineNonZeroes(b *block, zig, zigEnd, nz, delta int32) (int32, error) {401	for ; zig <= zigEnd; zig++ {402		u := unzig[zig]403		if b[u] == 0 {404			if nz == 0 {405				break406			}407			nz--408			continue409		}410		bit, err := d.decodeBit()411		if err != nil {412			return 0, err413		}414		if !bit {415			continue416		}417		if b[u] >= 0 {418			b[u] += delta419		} else {420			b[u] -= delta421		}422	}423	return zig, nil424}...

formatError

Using AI Code Generation

1import (2func main() {3	f, err := os.Open("test.txt")4	if err != nil {5		fmt.Println(err)6	}7	fmt.Println(f.Name(), "opened successfully")8}9type error interface {10    Error() string11}12fmt.Println(f.Name(), "opened successfully")13fmt.Println(err)14The Error() method of the *PathError type returns a string in the following format:

formatError

Using AI Code Generation

1import (2func main() {3    _, err := Sqrt(-10)4    if err != nil {5        log.Println(err)6    }7}8import (9func main() {10    _, err := Sqrt(-10)11    if err != nil {12        if err, ok := err.(*Error); ok {13            fmt.Println(err.arg)14            fmt.Println(err.msg)15        } else {16            log.Fatal(err)17        }18    }19}20import (21func main() {22    _, err := Sqrt(-10)23    if err != nil {24        if err, ok := err.(*Error); ok {25            fmt.Println(err.arg)26            fmt.Println(err.msg)27        } else {28            log.Fatal(err)29        }30    }31}32import (33func main() {34    _, err := Sqrt(-10)35    if err != nil {36        if err, ok := err.(*Error); ok {37            fmt.Println(err.arg)38            fmt.Println(err.msg)39        } else {40            log.Fatal(err)41        }42    }43}44import (45func main() {46    _, err := Sqrt(-10)47    if err != nil {48        if err, ok := err.(*Error); ok {49            fmt.Println(err.arg)50            fmt.Println(err.msg)51        } else {52            log.Fatal(err)53        }54    }55}56import (57func main() {58    _, err := Sqrt(-10)59    if err != nil {60        if err, ok := err.(*Error); ok {61            fmt.Println(err.arg)62            fmt.Println(err.msg)63        } else {64            log.Fatal(err)65        }66    }67}

formatError

Using AI Code Generation

1import (2func main() {3	_, err := os.Open("no-file.txt")4	if err != nil {5		fmt.Println("err happened", err)6		fmt.Println("err happened", err.(*os.PathError).Err)7	}8}9import (10func main() {11	_, err := os.Open("no-file.txt")12	if err != nil {13		fmt.Println("err happened", err)14		fmt.Println("err happened", err.(*os.PathError).Err.Error())15	}16}17import (18func main() {19	_, err := os.Open("no-file.txt")20	if err != nil {21		fmt.Println("err happened", err)22		fmt.Println("err happened", err.(*os.PathError).Err.Error())23		fmt.Println("err happened", err.(*os.PathError).Err.Error())24	}25}

formatError

Using AI Code Generation

1import (2type td struct {3}4func (t td) formatError() string {5    return t.Time.Format("2006-01-02")6}7func main() {8    t := td{time.Now()}9    fmt.Println(t.formatError())10}11import (12type td struct {13}14func (t td) formatError() string {15    return t.Time.Format("2006-01-02")16}17func main() {18    t := td{time.Now()}19    fmt.Println(t.formatError())20    fmt.Println(t.Time.Format("2006-01-02"))21}

formatError

Using AI Code Generation

1import (2func main() {3	err := formatError("error occurred")4	fmt.Println(err)5}6import (7func main() {8	err := formatError("error occurred")9	fmt.Println(err)10}11import (12func main() {13	err := formatError("error occurred")14	fmt.Println(err)15}

formatError

Using AI Code Generation

1import (2func main() {3	err := td.formatError("this is error")4	fmt.Println(err)5}6import (7func main() {8	err := td.formatError("this is error")9	fmt.Println(err)10}11import (12func main() {13	err := td.formatError("this is error")14	fmt.Println(err)15}16import (17func main() {18	err := td.formatError("this is error")19	fmt.Println(err)20}21import (22func main() {23	err := td.formatError("this is error")24	fmt.Println(err)25}

formatError

Using AI Code Generation

1import (2func main() {3    err := formatError("this is an error")4    fmt.Println(err)5}6func formatError(s string) error {7    return &td{s, time.Now()}8}9import (10func main() {11    err := formatError("this is an error")12    fmt.Println(err)13}14func formatError(s string) error {15    return &td{s, time.Now()}16}17import (18func main() {19    err := formatError("this is an error")20    fmt.Println(err)21}22func formatError(s string) error {23    return &td{s, time.Now()}24}25import (26func main() {27    err := formatError("this is an error")28    fmt.Println(err)29}30func formatError(s string) error {31    return &td{s, time.Now()}32}33import (34func main() {35    err := formatError("this is an error")36    fmt.Println(err)37}38func formatError(s string) error {39    return &td{s, time.Now()}40}41import (42func main() {43    err := formatError("this is an error")44    fmt.Println(err)45}46func formatError(s string) error {47    return &td{s, time.Now()}48}49import (50func main() {51    err := formatError("this is an error")52    fmt.Println(err)53}54func formatError(s string) error {55    return &td{s, time.Now()}56}

formatError

Using AI Code Generation

1import (2func (t td) Error() string {3    return fmt.Sprintf("Error in td")4}5func main() {6    err := formatError(t)7    if err != nil {8        log.Println(err)9    }10}11func formatError(err error) error {12    return fmt.Errorf("formatting error: %w", err)13}14import (15func (t td) Error() string {16    return fmt.Sprintf("Error in td")17}18func main() {19    err := formatError(t)20    if err != nil {21        if errors.Is(err, t) {22            log.Println("Error is of type td")23        } else {24            log.Println("Error is not of type td")25        }26    }27}28func formatError(err error) error {29    return fmt.Errorf("formatting error: %w", err)30}31import (32func (t td) Error() string {33    return fmt.Sprintf("Error in td")34}35func main() {36    err := formatError(t)37    if err != nil {38        if errors.As(err, &t) {39            log.Println("Error is of type td")40        } else {41            log.Println("Error is not of type td")42        }43    }44}45func formatError(err error) error {46    return fmt.Errorf("formatting error: %w", err)47}48import (49func (t td) Error() string {

formatError

Using AI Code Generation

1import (2func main() {3	td := td{407, "Permission Denied"}4	err := td.formatError()5	if err != nil {6		fmt.Println(err)7	}8}9import (10type td struct {11}12func (td *td) formatError() error {13	s := fmt.Sprintf("code: %d, message: %s", td.code, td.message)14	return errors.New(s)15}16import (17func main() {18	td := td{407, "Permission Denied"}19	err := td.formatError()20	if err != nil {21		fmt.Println(err)22	}23}24import (25type td struct {26}27func (td *td) formatError() error {28	s := fmt.Sprintf("code: %d, message: %s", td.code, td.message)29	return errors.New(s)30}31import (32func main() {33	td := td{407, "Permission Denied"}34	err := td.formatError()35	if err != nil {36		fmt.Println(err)37	}38}39import (40type td struct {

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