int ff_lzw_decode(LZWState *p, uint8_t *buf, int len){

    int l, c, code, oc, fc;

    uint8_t *sp;

    struct LZWState *s = (struct LZWState *)p;



    if (s->end_code < 0)

        return 0;



    l = len;

    sp = s->sp;

    oc = s->oc;

    fc = s->fc;



    for (;;) {

        while (sp > s->stack) {

            *buf++ = *(--sp);

            if ((--l) == 0)

                goto the_end;

        }

        c = lzw_get_code(s);

        if (c == s->end_code) {

            s->end_code = -1;

            break;

        } else if (c == s->clear_code) {

            s->cursize = s->codesize + 1;

            s->curmask = mask[s->cursize];

            s->slot = s->newcodes;

            s->top_slot = 1 << s->cursize;

            fc= oc= -1;

        } else {

            code = c;

            if (code >= s->slot) {

                *sp++ = fc;

                code = oc;

            }

            while (code >= s->newcodes) {

                *sp++ = s->suffix[code];

                code = s->prefix[code];

            }

            *sp++ = code;

            if (s->slot < s->top_slot && oc>=0) {

                s->suffix[s->slot] = code;

                s->prefix[s->slot++] = oc;

            }

            fc = code;

            oc = c;

            if (s->slot >= s->top_slot - s->extra_slot) {

                if (s->cursize < LZW_MAXBITS) {

                    s->top_slot <<= 1;

                    s->curmask = mask[++s->cursize];

                }

            }

        }

    }

  the_end:

    s->sp = sp;

    s->oc = oc;

    s->fc = fc;

    return len - l;

}

int ff_lzw_decode(LZWState *p, uint8_t *buf, int len){

    int l, c, code, oc, fc;

    uint8_t *sp;

    struct LZWState *s = (struct LZWState *)p;



    if (s->end_code < 0)

        return 0;



    l = len;

    sp = s->sp;

    oc = s->oc;

    fc = s->fc;



    for (;;) {

        while (sp > s->stack) {

            *buf++ = *(--sp);

            if ((--l) == 0)

                goto the_end;

        }

        c = lzw_get_code(s);

        if (c == s->end_code) {

            s->end_code = -1;

            break;

        } else if (c == s->clear_code) {

            s->cursize = s->codesize + 1;

            s->curmask = mask[s->cursize];

            s->slot = s->newcodes;

            s->top_slot = 1 << s->cursize;

            fc= oc= -1;

        } else {

            code = c;

            if (code >= s->slot) {

                *sp++ = fc;

                code = oc;

            }

            while (code >= s->newcodes) {

                *sp++ = s->suffix[code];

                code = s->prefix[code];

            }

            *sp++ = code;

            if (s->slot < s->top_slot && oc>=0) {

                s->suffix[s->slot] = code;

                s->prefix[s->slot++] = oc;

            }

            fc = code;

            oc = c;

            if (s->slot >= s->top_slot - s->extra_slot) {

                if (s->cursize < LZW_MAXBITS) {

                    s->top_slot <<= 1;

                    s->curmask = mask[++s->cursize];

                }

            }

        }

    }

  the_end:

    s->sp = sp;

    s->oc = oc;

    s->fc = fc;

    return len - l;

}

            s->end_code = -1;             if (code >= s->slot) {
int FUNC_0(LZWState *VAR_0, uint8_t *VAR_1, int VAR_2){

    int VAR_3, VAR_4, VAR_5, VAR_6, VAR_7;

    uint8_t *sp;

    struct LZWState *VAR_8 = (struct LZWState *)VAR_0;



    if (VAR_8->end_code < 0)

        return 0;



    VAR_3 = VAR_2;

    sp = VAR_8->sp;

    VAR_6 = VAR_8->VAR_6;

    VAR_7 = VAR_8->VAR_7;



    for (;;) {

        while (sp > VAR_8->stack) {

            *VAR_1++ = *(--sp);

            if ((--VAR_3) == 0)

                goto the_end;

        }

        VAR_4 = lzw_get_code(VAR_8);

        if (VAR_4 == VAR_8->end_code) {

            VAR_8->end_code = -1;

            break;

        } else if (VAR_4 == VAR_8->clear_code) {

            VAR_8->cursize = VAR_8->codesize + 1;

            VAR_8->curmask = mask[VAR_8->cursize];

            VAR_8->slot = VAR_8->newcodes;

            VAR_8->top_slot = 1 << VAR_8->cursize;

            VAR_7= VAR_6= -1;

        } else {

            VAR_5 = VAR_4;

            if (VAR_5 >= VAR_8->slot) {

                *sp++ = VAR_7;

                VAR_5 = VAR_6;

            }

            while (VAR_5 >= VAR_8->newcodes) {

                *sp++ = VAR_8->suffix[VAR_5];

                VAR_5 = VAR_8->prefix[VAR_5];

            }

            *sp++ = VAR_5;

            if (VAR_8->slot < VAR_8->top_slot && VAR_6>=0) {

                VAR_8->suffix[VAR_8->slot] = VAR_5;

                VAR_8->prefix[VAR_8->slot++] = VAR_6;

            }

            VAR_7 = VAR_5;

            VAR_6 = VAR_4;

            if (VAR_8->slot >= VAR_8->top_slot - VAR_8->extra_slot) {

                if (VAR_8->cursize < LZW_MAXBITS) {

                    VAR_8->top_slot <<= 1;

                    VAR_8->curmask = mask[++VAR_8->cursize];

                }

            }

        }

    }

  the_end:

    VAR_8->sp = sp;

    VAR_8->VAR_6 = VAR_6;

    VAR_8->VAR_7 = VAR_7;

    return VAR_2 - VAR_3;

}

int FUNC_0(LZWState *VAR_0, uint8_t *VAR_1, int VAR_2){ int VAR_3, VAR_4, VAR_5, VAR_6, VAR_7; uint8_t *sp; struct LZWState *VAR_8 = (struct LZWState *)VAR_0; if (VAR_8->end_code < 0)
return 0; VAR_3 = VAR_2; sp = VAR_8->sp; VAR_6 = VAR_8->VAR_6; VAR_7 = VAR_8->VAR_7; for (;;) { while (sp > VAR_8->stack) { *VAR_1++ = *(--sp); if ((--VAR_3) == 0)
goto the_end; } VAR_4 = lzw_get_code(VAR_8); if (VAR_4 == VAR_8->end_code) { VAR_8->end_code = -1; break; } else if (VAR_4 == VAR_8->clear_code) { VAR_8->cursize = VAR_8->codesize + 1; VAR_8->curmask = mask[VAR_8->cursize]; VAR_8->slot = VAR_8->newcodes; VAR_8->top_slot = 1 << VAR_8->cursize; VAR_7= VAR_6= -1; } else { VAR_5 = VAR_4; if (VAR_5 >= VAR_8->slot) { *sp++ = VAR_7; VAR_5 = VAR_6; } while (VAR_5 >= VAR_8->newcodes) { *sp++ = VAR_8->suffix[VAR_5]; VAR_5 = VAR_8->prefix[VAR_5]; } *sp++ = VAR_5; if (VAR_8->slot < VAR_8->top_slot && VAR_6>=0) { VAR_8->suffix[VAR_8->slot] = VAR_5; VAR_8->prefix[VAR_8->slot++] = VAR_6; } VAR_7 = VAR_5; VAR_6 = VAR_4; if (VAR_8->slot >= VAR_8->top_slot - VAR_8->extra_slot) { if (VAR_8->cursize < LZW_MAXBITS) { VAR_8->top_slot <<= 1; VAR_8->curmask = mask[++VAR_8->cursize]; } } } } the_end:
VAR_8->sp = sp; VAR_8->VAR_6 = VAR_6; VAR_8->VAR_7 = VAR_7; return VAR_2 - VAR_3; }