/* Copyright 2014 Adobe Systems Incorporated (http://www.adobe.com/). All Rights Reserved.
   This software is licensed as OpenSource, under the Apache License, Version 2.0.
   This license is available at: http://opensource.org/licenses/Apache-2.0. */

/*
 * Abstract font dump.
 */

#include "absfont.h"
#include "dictops.h"
#include "txops.h"
#include "ctutil.h"

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <limits.h>
#include <float.h>

#define ARRAY_LEN(a) (sizeof(a) / sizeof((a)[0]))
#define DUMP_LANG_GROUP (1 << 0)
#define RND(v) ((float)floor((v) + 0.5))

/* Dump string. */
static void dumpString(abfDumpCtx h, char *name, char *ptr) {
    if (ptr == ABF_UNSET_PTR)
        return;

    FPRINTF_S(h->fp, "%-20s", name);

    /* Dump string with carriage return and control character handling */
    fputc('"', h->fp);
    for (;;) {
        int c = *ptr++;
        switch (c) {
            case '\0':
                FPRINTF_S(h->fp, "\"\n");
                return;
            case '\r':
                fputc('\n', h->fp);
                if (*ptr == '\n')
                    ptr++;
                break;
            case '\n':
                fputc('\n', h->fp);
                break;
            default:
                if (iscntrl(c))
                    FPRINTF_S(h->fp, "\\x%02X", c & 0xff);
                else
                    fputc(c, h->fp);
                break;
        }
    }
}

/* Dump integer array. */
static void dumpIntArray(abfDumpCtx h, char *name, long cnt, long *array) {
    int i;
    char *sep;

    if (cnt == ABF_EMPTY_ARRAY)
        return;

    FPRINTF_S(h->fp, "%-20s", name);
    sep = "{";
    for (i = 0; i < cnt; i++) {
        FPRINTF_S(h->fp, "%s%ld", sep, array[i]);
        sep = ",";
    }
    FPRINTF_S(h->fp, "}\n");
}

/* Dump real array. */
static void dumpRealArray(abfDumpCtx h, char *name, long cnt, float *array) {
    int i;
    char *sep;

    if (cnt == ABF_EMPTY_ARRAY)
        return;

    FPRINTF_S(h->fp, "%-20s", name);
    sep = "{";
    for (i = 0; i < cnt; i++) {
        FPRINTF_S(h->fp, "%s%g", sep, array[i]);
        sep = ",";
    }
    FPRINTF_S(h->fp, "}\n");
}

/* Dump FontMatrix. */
static void dumpFontMatrix(abfDumpCtx h, char *name, abfFontMatrix *FontMatrix) {
    if (!abfIsDefaultFontMatrix(FontMatrix)) {
        /* Print values with higher precision than dumpRealArray() provides */
        int i;
        char *sep;
        FPRINTF_S(h->fp, "%-20s", name);
        sep = "{";
        for (i = 0; i < FontMatrix->cnt; i++) {
            FPRINTF_S(h->fp, "%s%.8g", sep, FontMatrix->array[i]);
            sep = ",";
        }
        FPRINTF_S(h->fp, "}\n");
    }
}

/* Dump top dictionary. */
static void dumpTopDict(abfDumpCtx h, abfTopDict *top) {
    char *OrigFontType;
    char *srcFontType;

    dumpString(h, "version", top->version.ptr);
    dumpString(h, "Notice", top->Notice.ptr);
    dumpString(h, "Copyright", top->Copyright.ptr);
    dumpString(h, "FullName", top->FullName.ptr);
    dumpString(h, "FamilyName", top->FamilyName.ptr);
    dumpString(h, "Weight", top->Weight.ptr);
    if (top->isFixedPitch != cff_DFLT_isFixedPitch)
        FPRINTF_S(h->fp, "isFixedPitch        true\n");
    if (top->ItalicAngle != cff_DFLT_ItalicAngle)
        FPRINTF_S(h->fp, "ItalicAngle         %g\n", top->ItalicAngle);
    if (top->UnderlinePosition != cff_DFLT_UnderlinePosition)
        FPRINTF_S(h->fp, "UnderlinePosition   %g\n", top->UnderlinePosition);
    if (top->UnderlineThickness != cff_DFLT_UnderlineThickness)
        FPRINTF_S(h->fp, "UnderlineThickness  %g\n", top->UnderlineThickness);
    if (top->UniqueID != ABF_UNSET_INT)
        FPRINTF_S(h->fp, "UniqueID            %ld\n", top->UniqueID);
    if (top->FontBBox[0] != 0.0 || top->FontBBox[1] != 0.0 ||
        top->FontBBox[2] != 0.0 || top->FontBBox[3] != 0.0)
        FPRINTF_S(h->fp, "FontBBox            {%g,%g,%g,%g}\n",
                  top->FontBBox[0], top->FontBBox[1],
                  top->FontBBox[2], top->FontBBox[3]);
    if (top->StrokeWidth != cff_DFLT_StrokeWidth)
        FPRINTF_S(h->fp, "StrokeWidth         %g\n", top->StrokeWidth);
    dumpIntArray(h, "XUID", top->XUID.cnt, top->XUID.array);

    /* CFF and Acrobat extensions */
    dumpString(h, "PostScript", top->PostScript.ptr);
    dumpString(h, "BaseFontName", top->BaseFontName.ptr);
    dumpIntArray(h, "BaseFontBlend",
                 top->BaseFontBlend.cnt, top->BaseFontBlend.array);
    if (top->FSType != ABF_UNSET_INT)
        FPRINTF_S(h->fp, "FSType              %ld\n", top->FSType);
    switch (top->OrigFontType) {
        case abfOrigFontTypeType1:
            OrigFontType = "Type1";
            break;
        case abfOrigFontTypeCID:
            OrigFontType = "CID";
            break;
        case abfOrigFontTypeTrueType:
            OrigFontType = "TrueType";
            break;
        case abfOrigFontTypeOCF:
            OrigFontType = "OCF";
            break;
        default:
            OrigFontType = NULL;
            break;
    }
    if (OrigFontType != NULL)
        FPRINTF_S(h->fp, "OrigFontType        %s\n", OrigFontType);
    if (top->WasEmbedded != 0)
        FPRINTF_S(h->fp, "WasEmbedded         true\n");

    /* Synthetic font */
    dumpString(h, "SynBaseFontName", top->SynBaseFontName.ptr);

    /* CID-keyed font extensions */
    dumpFontMatrix(h, "cid.FontMatrix", &top->cid.FontMatrix);
    dumpString(h, "cid.CIDFontName", top->cid.CIDFontName.ptr);
    dumpString(h, "cid.Registry", top->cid.Registry.ptr);
    dumpString(h, "cid.Ordering", top->cid.Ordering.ptr);
    if (top->cid.Supplement != ABF_UNSET_INT)
        FPRINTF_S(h->fp, "cid.Supplement      %ld\n", top->cid.Supplement);
    if (top->cid.CIDFontVersion != cff_DFLT_CIDFontVersion)
        FPRINTF_S(h->fp, "cid.CIDFontVersion  %.03f\n", top->cid.CIDFontVersion);
    if (top->cid.CIDFontRevision != cff_DFLT_CIDFontRevision)
        FPRINTF_S(h->fp, "cid.CIDFontRevision %ld\n", top->cid.CIDFontRevision);
    if (top->cid.CIDCount != cff_DFLT_CIDCount)
        FPRINTF_S(h->fp, "cid.CIDCount        %ld\n", top->cid.CIDCount);
    if (top->cid.UIDBase != ABF_UNSET_INT)
        FPRINTF_S(h->fp, "cid.UIDBase         %ld\n", top->cid.UIDBase);

    /* Supplementary data */
    if (top->sup.flags != 0) {
        char *sep = " (";
        FPRINTF_S(h->fp, "sup.flags           0x%08lx", top->sup.flags);
        if (top->sup.flags & ABF_SYN_FONT) {
            FPRINTF_S(h->fp, "%sABF_SYN_FONT", sep);
            sep = ",";
        }
        if (top->sup.flags & ABF_CID_FONT) {
            FPRINTF_S(h->fp, "%sABF_CID_FONT", sep);
            sep = ",";
        }
        if (sep[0] == ',')
            FPRINTF_S(h->fp, ")");
        FPRINTF_S(h->fp, "\n");
    }
    switch (top->sup.srcFontType) {
        case abfSrcFontTypeType1Name:
            srcFontType = "Type 1 (name-keyed)";
            break;
        case abfSrcFontTypeType1CID:
            srcFontType = "Type 1 (cid-keyed)";
            break;
        case abfSrcFontTypeCFFName:
            srcFontType = "CFF (name-keyed)";
            break;
        case abfSrcFontTypeCFFCID:
            srcFontType = "CFF (cid-keyed)";
            break;
        case abfSrcFontTypeSVGName:
            srcFontType = "SVG (name-keyed)";
            break;
        case abfSrcFontTypeUFOName:
            srcFontType = "UFO (name-keyed)";
            break;
        case abfSrcFontTypeUFOCID:
            srcFontType = "UFO (cid-keyed)";
            break;
        case abfSrcFontTypeTrueType:
            srcFontType = "TrueType";
            break;
        default:
            srcFontType = NULL;
            break;
    }
    if (srcFontType != NULL)
        FPRINTF_S(h->fp, "sup.srcFontType     %s\n", srcFontType);
    if (top->sup.UnitsPerEm != 1000)
        FPRINTF_S(h->fp, "sup.UnitsPerEm      %ld\n", top->sup.UnitsPerEm);
    if (top->sup.nGlyphs != ABF_UNSET_INT)
        FPRINTF_S(h->fp, "sup.nGlyphs         %ld\n", top->sup.nGlyphs);
}

/* Dump Private dictionary. */
static void dumpPrivateDict(abfDumpCtx h, abfPrivateDict *priv) {
    dumpRealArray(h, "BlueValues",
                  priv->BlueValues.cnt, priv->BlueValues.array);
    dumpRealArray(h, "OtherBlues",
                  priv->OtherBlues.cnt, priv->OtherBlues.array);
    dumpRealArray(h, "FamilyBlues",
                  priv->FamilyBlues.cnt, priv->FamilyBlues.array);
    dumpRealArray(h, "FamilyOtherBlues",
                  priv->FamilyOtherBlues.cnt,
                  priv->FamilyOtherBlues.array);
    if (priv->BlueScale != (float)cff_DFLT_BlueScale)
        FPRINTF_S(h->fp, "BlueScale           %g\n", priv->BlueScale);
    if (priv->BlueShift != cff_DFLT_BlueShift)
        FPRINTF_S(h->fp, "BlueShift           %g\n", priv->BlueShift);
    if (priv->BlueFuzz != cff_DFLT_BlueFuzz)
        FPRINTF_S(h->fp, "BlueFuzz            %g\n", priv->BlueFuzz);
    if (priv->StdHW != ABF_UNSET_REAL)
        FPRINTF_S(h->fp, "StdHW               %g\n", priv->StdHW);
    if (priv->StdVW != ABF_UNSET_REAL)
        FPRINTF_S(h->fp, "StdVW               %g\n", priv->StdVW);
    dumpRealArray(h, "StemSnapH",
                  priv->StemSnapH.cnt, priv->StemSnapH.array);
    dumpRealArray(h, "StemSnapV",
                  priv->StemSnapV.cnt, priv->StemSnapV.array);
    if (priv->ForceBold != cff_DFLT_ForceBold)
        FPRINTF_S(h->fp, "ForceBold           true\n");
    if (priv->LanguageGroup != cff_DFLT_LanguageGroup)
        FPRINTF_S(h->fp, "LanguageGroup       %ld\n", priv->LanguageGroup);
    if (priv->ExpansionFactor != (float)cff_DFLT_ExpansionFactor)
        FPRINTF_S(h->fp, "ExpansionFactor     %g\n", priv->ExpansionFactor);
    if (priv->initialRandomSeed != cff_DFLT_initialRandomSeed)
        FPRINTF_S(h->fp, "initialRandomSeed   %g\n", priv->initialRandomSeed);
}

/* Dump font dictionary. */
static void dumpFontDict(abfDumpCtx h, abfFontDict *font) {
    dumpString(h, "FontName", font->FontName.ptr);
    if (font->PaintType != cff_DFLT_PaintType)
        FPRINTF_S(h->fp, "PaintType           %ld\n", font->PaintType);
    dumpFontMatrix(h, "FontMatrix", &font->FontMatrix);
    FPRINTF_S(h->fp, "## Private\n");
    dumpPrivateDict(h, &font->Private);
}

/* Begin font dump by dumping dicts. */
void abfDumpBegFont(abfDumpCtx h, abfTopDict *top) {
    if (h->level < 0 || h->level > 6)
        h->level = 1; /* Set default for invalid levels */

    if (h->level <= 3) {
        long i, j;

        FPRINTF_S(h->fp, "## Filename %s\n",
                  (top->sup.filename == ABF_UNSET_PTR) ? "<unknown>" : top->sup.filename);

        FPRINTF_S(h->fp, "## Top Dict\n");
        dumpTopDict(h, top);
        for (i = 0; i < top->FDArray.cnt; i++) {
            if (h->fdCnt == 0) {
                FPRINTF_S(h->fp, "## FontDict[%ld]\n", i);
                dumpFontDict(h, &top->FDArray.array[i]);
            } else {
                if (h->excludeSubset) {
                    unsigned int match = 0;
                    for (j = 0; j < h->fdCnt; j++) {
                        if (i == h->fdArray[j]) {
                            match = 1;
                            break;
                        }
                    }
                    if (!match) {
                        FPRINTF_S(h->fp, "## FontDict[%ld]\n", i);
                        dumpFontDict(h, &top->FDArray.array[i]);
                    }

                } else {
                    for (j = 0; j < h->fdCnt; j++) {
                        if (i == h->fdArray[j]) {
                            FPRINTF_S(h->fp, "## FontDict[%ld]\n", i);
                            dumpFontDict(h, &top->FDArray.array[i]);
                            break;
                        }
                    }
                }
            }
        }
    }

    if (h->level == 0)
        return;

    {
        long i;
        h->flags = 0;
        for (i = 0; i < top->FDArray.cnt; i++)
            if (top->FDArray.array[i].Private.LanguageGroup == 1) {
                h->flags |= DUMP_LANG_GROUP;
                break;
            }
        h->left = 0;
    }

    /* Print glyph comment */
    if (top->sup.flags & ABF_CID_FONT)
        /* UFO can store names even when CID-keyed */
        if (top->sup.srcFontType == abfSrcFontTypeUFOCID) {
            FPRINTF_S(h->fp, "## glyph[tag] {name,cid,iFD");
        } else {
            FPRINTF_S(h->fp, "## glyph[tag] {cid,iFD");
        } else
        FPRINTF_S(h->fp, "## glyph[tag] {name,encoding");
    if (h->flags & DUMP_LANG_GROUP)
        FPRINTF_S(h->fp, ",LanguageGroup");
    if (h->level == 1 || h->level == 4)
        FPRINTF_S(h->fp, "}\n");
    else
        FPRINTF_S(h->fp, ",path}\n");
}

/* ------------------------------- Glyph Dump ------------------------------ */

/* Dump glyph beginning. */
static int glyphBeg(abfGlyphCallbacks *cb, abfGlyphInfo *info) {
    abfDumpCtx h = (abfDumpCtx)cb->direct_ctx;

    cb->info = info;
    if (h->level == 0)
        return ABF_SKIP_RET;

    FPRINTF_S(h->fp, "glyph[%hu] {", info->tag);
    if (info->flags & ABF_GLYPH_CID)
        /* Dump CID-keyed glyph. Check for names first since UFO can store name and CID */
        if (info->gname.ptr != NULL) {
            FPRINTF_S(h->fp, "%s,%hu,%u", info->gname.ptr, info->cid, info->iFD);
        } else {
            FPRINTF_S(h->fp, "%hu,%u", info->cid, info->iFD);
        } else {
        /* Dump name-keyed glyph */
        abfEncoding *enc = &info->encoding;
        if (info->gname.ptr == NULL)
            FPRINTF_S(h->fp, "(missing)");
        else
            FPRINTF_S(h->fp, "%s", info->gname.ptr);
        if (enc->code == ABF_GLYPH_UNENC)
            FPRINTF_S(h->fp, ",-");
        else {
            /* Dump encoding */
            char *sep = ",";
            do {
                if (info->flags & ABF_GLYPH_UNICODE) {
                    if (enc->code < 0x10000)
                        FPRINTF_S(h->fp, "%sU+%04lX", sep, enc->code);
                    else
                        FPRINTF_S(h->fp, "%sU+%lX", sep, enc->code);
                } else
                    FPRINTF_S(h->fp, "%s0x%02lX", sep, enc->code);
                sep = "+";
                enc = enc->next;
            } while (enc != NULL);
        }
    }
    if (h->flags & DUMP_LANG_GROUP)
        FPRINTF_S(h->fp, ",%d", (info->flags & ABF_GLYPH_LANG_1) != 0);
    switch (h->level) {
        case 1:
        case 4:
            FPRINTF_S(h->fp, "}\n");
            return ABF_SKIP_RET;
        case 2:
        case 5:
            FPRINTF_S(h->fp, ",");
            break;
        case 3:
        case 6:
            FPRINTF_S(h->fp, ",\n");
            break;
    }
    h->left = 0;

    return ABF_CONT_RET;
}

/* Dump instruction according to dump level. */
static void CTL_CDECL dumpInstr(abfGlyphCallbacks *cb, char *fmt, ...) {
    abfDumpCtx h = (abfDumpCtx)cb->direct_ctx;
    va_list ap;
    va_start(ap, fmt);
    switch (h->level) {
        case 2:
        case 5: {
            int length;
            char buf[128];
            const size_t bufLen = sizeof(buf);
            VSPRINTF_S(buf, bufLen, fmt, ap);
            length = (int)strnlen(buf, bufLen);
            if (length > h->left) {
                char *p;
                /* Find break point */
                for (p = &buf[h->left]; *p != ' '; p--)
                    ;
                FPRINTF_S(h->fp, "%.*s\n", (int)(p - buf), buf);
                FPRINTF_S(h->fp, "%s", p);
                h->left = (int)(79 - (strlen(p) + 1));
            } else {
                FPRINTF_S(h->fp, "%s", buf);
                h->left -= length;
            }
        } break;
        case 3:
        case 6:
            FPRINTF_S(h->fp, " ");
            VFPRINTF_S(h->fp, fmt, ap);
            FPRINTF_S(h->fp, "\n");
            break;
        default:
            break;
    }
    va_end(ap);
}

/* Dump glyph width. */
static void glyphWidth(abfGlyphCallbacks *cb, float hAdv) {
    dumpInstr(cb, " %g width", roundf(hAdv));
}

/* Write real number in ASCII to dst stream. */
#define TX_EPSILON 0.0003
/*In Xcode, FLT_EPSILON is 1.192..x10-7, but the diff between value-roundf(value) can be 3.05x10-5, when the input value is an integer. */
static void writeReal(char *buf, const size_t bufLen, float value) {
    char tmp[50];

    /* if no decimal component, perform a faster to string conversion */
    if ((fabs(value - roundf(value)) < TX_EPSILON) && (value > LONG_MIN) && (value < LONG_MAX))
        SPRINTF_S(tmp, sizeof(tmp), " %ld", (long int)roundf(value));
    else {
        int l;
        float value2 = (float)RND_ON_WRITE(value);  // to avoid getting -0 from 0.0004.
        if ((value2 == 0) && (value < 0))
            value2 = 0;
        SPRINTF_S(tmp, sizeof(tmp), " %.2f", value2);
        l = (int)strlen(tmp) - 1;
        if ((tmp[l] == '0') && (tmp[l - 1] == '0')) {
            tmp[l - 2] = 0;
        }
    }
    STRCAT_S(buf, bufLen, tmp);
}

/* Dump glyph move. */
static void glyphMove(abfGlyphCallbacks *cb, float x0, float y0) {
    char buf[128];
    const size_t bufLen = sizeof(buf);
    buf[0] = 0;
    writeReal(buf, bufLen, x0);
    writeReal(buf, bufLen, y0);
    STRCAT_S(buf, bufLen, " move");
    dumpInstr(cb, "%s", buf);
}

/* Dump glyph line. */
static void glyphLine(abfGlyphCallbacks *cb, float x1, float y1) {
    char buf[128];
    const size_t bufLen = sizeof(buf);
    buf[0] = 0;
    writeReal(buf, bufLen, x1);
    writeReal(buf, bufLen, y1);
    STRCAT_S(buf, bufLen, " line");
    dumpInstr(cb, "%s", buf);
}

/* Dump glyph curve. */
static void glyphCurve(abfGlyphCallbacks *cb,
                       float x1, float y1,
                       float x2, float y2,
                       float x3, float y3) {
    char buf[128];
    const size_t bufLen = sizeof(buf);
    buf[0] = 0;
    writeReal(buf, bufLen, x1);
    writeReal(buf, bufLen, y1);
    writeReal(buf, bufLen, x2);
    writeReal(buf, bufLen, y2);
    writeReal(buf, bufLen, x3);
    writeReal(buf, bufLen, y3);
    STRCAT_S(buf, bufLen, " curve");
    dumpInstr(cb, "%s", buf);
}

/* Dump glyph stem. */
static void glyphStem(abfGlyphCallbacks *cb,
                      int flags, float edge0, float edge1) {
    char buf[128];
    const size_t bufLen = sizeof(buf);
    buf[0] = 0;

    if (flags & ABF_NEW_HINTS)
        dumpInstr(cb, " newhints");
    if (flags & ABF_NEW_GROUP)
        dumpInstr(cb, " newgroup");
    if (flags & ABF_CNTR_STEM) {
        writeReal(buf, bufLen, edge0);
        writeReal(buf, bufLen, edge1);
        STRCAT_S(buf, bufLen, (flags & ABF_VERT_STEM) ? " vcntr" : " hcntr");
        // dumpInstr(cb, " %.3f %.3f %s", edge0, edge1, (flags & ABF_VERT_STEM)? "vcntr": "hcntr");
    } else if (flags & ABF_STEM3_STEM) {
        writeReal(buf, bufLen, edge0);
        writeReal(buf, bufLen, edge1);
        STRCAT_S(buf, bufLen, (flags & ABF_VERT_STEM) ? " vstem3" : " hstem3");
        // dumpInstr(cb, " %.3f %.3f %s", edge0, edge1, (flags & ABF_VERT_STEM)? "vstem3": "hstem3");
    } else {
        float width = RND(edge1 - edge0);
        if (width == ABF_EDGE_HINT_LO) {
            writeReal(buf, bufLen, edge1);
            STRCAT_S(buf, bufLen, (flags & ABF_VERT_STEM) ? " leftedge" : " bottomedge");
            // dumpInstr(cb, " %.3f %s", edge1, (flags & ABF_VERT_STEM)? "leftedge": "bottomedge");
        } else if (width == ABF_EDGE_HINT_HI) {
            writeReal(buf, bufLen, edge0);
            STRCAT_S(buf, bufLen, (flags & ABF_VERT_STEM) ? " rightedge" : " topedge");
            // dumpInstr(cb, " %.3f %s", edge0, (flags & ABF_VERT_STEM)? "rightedge": "topedge");
        } else {
            writeReal(buf, bufLen, edge0);
            writeReal(buf, bufLen, edge1);
            STRCAT_S(buf, bufLen, (flags & ABF_VERT_STEM) ? " vstem" : " hstem");
            // dumpInstr(cb, " %.3f %.3f %s", edge0, edge1, (flags & ABF_VERT_STEM)? "vstem": "hstem");
        }
    }
    dumpInstr(cb, "%s", buf);
}

/* Dump glyph flex. */
static void glyphFlex(abfGlyphCallbacks *cb, float depth,
                      float x1, float y1,
                      float x2, float y2,
                      float x3, float y3,
                      float x4, float y4,
                      float x5, float y5,
                      float x6, float y6) {
    char buf[256];
    const size_t bufLen = sizeof(buf);
    buf[0] = 0;

    writeReal(buf, bufLen, x1);
    writeReal(buf, bufLen, y1);
    writeReal(buf, bufLen, x2);
    writeReal(buf, bufLen, y2);
    writeReal(buf, bufLen, x3);
    writeReal(buf, bufLen, y3);
    writeReal(buf, bufLen, x4);
    writeReal(buf, bufLen, y4);
    writeReal(buf, bufLen, x5);
    writeReal(buf, bufLen, y5);
    writeReal(buf, bufLen, x6);
    writeReal(buf, bufLen, y6);
    writeReal(buf, bufLen, depth);
    STRCAT_S(buf, bufLen, " flex");
    dumpInstr(cb, "%s", buf);
}

/* Dump glyph general operator. */
static void glyphGenop(abfGlyphCallbacks *cb,
                       int cnt, float *args, int op) {
    static char *opnames[] =
        {
            "reserved0",
            "hstem",
            "reserved2",
            "vstem",
            "vmoveto",
            "rlineto",
            "hlineto",
            "vlineto",
            "rrcurveto",
            "reserved9",
            "callsubr",
            "return",
            "escape",
            "reserved13",
            "endchar",
            "vsindex",
            "blend",
            "reserved17",
            "hstemhm",
            "hintmask",
            "cntrmask",
            "rmoveto",
            "hmoveto",
            "vstemhm",
            "rcurveline",
            "rlinecurve",
            "vvcurveto",
            "hhcurveto",
            "shortint",
            "callgsubr",
            "vhcurveto",
            "hvcurveto",
        };
    static char *escopnames[] =
        {
            "dotsection",
            "reservedESC1",
            "reservedESC2",
            "and",
            "or",
            "not",
            "reservedESC6",
            "reservedESC7",
            "reservedESC8",
            "abs",
            "add",
            "sub",
            "div",
            "reservedESC13",
            "neg",
            "eq",
            "reservedESC16",
            "reservedESC17",
            "drop",
            "reservedESC19",
            "put",
            "get",
            "ifelse",
            "random",
            "mul",
            "reservedESC25",
            "sqrt",
            "dup",
            "exch",
            "index",
            "roll",
            "reservedESC31",
            "reservedESC32",
            "cntroff", /* Reserved but used as cntroff by implementation */
            "hflex",
            "flex",
            "hflex1",
            "flex1",
            "cntron",
        };
    int hi = op >> 8 & 0xff;
    int lo = op & 0xff;
    char buf[80];
    const size_t bufLen = sizeof(buf);
    char *p = buf;

    /* Format args */
    size_t remainingBufLength = bufLen;
    while (cnt--) {
        size_t usedPrintLength;
        SPRINTF_S(p, remainingBufLength, " %g", *args++);
        usedPrintLength = strnlen(p, remainingBufLength);
        p += usedPrintLength;
        remainingBufLength -= usedPrintLength;
    }

    /* Format operator */
    if (hi) {
        if (hi != tx_escape)
            SPRINTF_S(p, remainingBufLength, " invalid");
        else if (lo >= (int)ARRAY_LEN(escopnames))
            SPRINTF_S(p, remainingBufLength, " reservedESC%d", lo);
        else
            SPRINTF_S(p, remainingBufLength, " %s", escopnames[lo]);
    } else if (lo >= (int)ARRAY_LEN(opnames))
        SPRINTF_S(p, remainingBufLength, " reserved%d", lo);
    else
        SPRINTF_S(p, remainingBufLength, " %s", opnames[lo]);

    dumpInstr(cb, buf);
}

/* Dump glyph seac. */
static void glyphSeac(abfGlyphCallbacks *cb,
                      float adx, float ady, int bchar, int achar) {
    dumpInstr(cb, " %g %g %d %d seac", adx, ady, bchar, achar);
}

/* Dump glyph end. */
static void glyphEnd(abfGlyphCallbacks *cb) {
    abfDumpCtx h = (abfDumpCtx)cb->direct_ctx;

    dumpInstr(cb, " endchar}");
    switch (h->level) {
        case 2:
        case 5:
            FPRINTF_S(h->fp, "\n");
            break;
    }
}

/* Dump glyph callbacks */
const abfGlyphCallbacks abfGlyphDumpCallbacks =
    {
        NULL,
        NULL,
        NULL,
        glyphBeg,
        glyphWidth,
        glyphMove,
        glyphLine,
        glyphCurve,
        glyphStem,
        glyphFlex,
        glyphGenop,
        glyphSeac,
        glyphEnd,
};
