#include "parser.h"

#define MAXSTACK 8

static OptionList *optionlists[32];
int numoptionlists;
static OptionList internalset;
static OptionList legalset;
int numinternalset;
int numlegalset;
int maxlegalset;
char curopt[1024];
Opt48 oStack[8];
int oStackPtr;

enum {
    ARGFLAG_1 = 1,
    ARGFLAG_2 = 2,
    ARGFLAG_4 = 4,
    ARGFLAG_8 = 8,
    ARGFLAG_10 = 0x10,
    ARGFLAG_20 = 0x20,
    ARGFLAG_40 = 0x40,
    ARGFLAG_80 = 0x80
};

enum {
    ARGSPELLFLAG_1 = 1,
    ARGSPELLFLAG_2 = 2,
    ARGSPELLFLAG_4 = 4,
    ARGSPELLFLAG_8 = 8,
    ARGSPELLFLAG_10 = 0x10,
    ARGSPELLFLAG_20 = 0x20,
    ARGSPELLFLAG_40 = 0x40,
    ARGSPELLFLAG_80 = 0x80
};

enum {
    OPTSPELLFLAG_1 = 1,
    OPTSPELLFLAG_2 = 2,
    OPTSPELLFLAG_4 = 4,
    OPTSPELLFLAG_8 = 8,
    OPTSPELLFLAG_10 = 0x10,
    OPTSPELLFLAG_20 = 0x20,
    OPTSPELLFLAG_40 = 0x40,
    OPTSPELLFLAG_80 = 0x80
};

static void Option_PushList(OptionList *lst) {
    Args_Push(1, lst, 0);
}

static void Option_PushOpt(Option *opt, const char *optname) {
    char *cpy;
    short flags = ARGFLAG_2;
    if (opt && (opt->avail & OTF_STICKY)) {
        if (Utils_CompareOptionString(opt->names, optname, opt->avail & OTF_CASED, OTF_STICKY)) {
            flags |= ARGFLAG_80;
        }
    }
    cpy = xstrdup(optname);
    Args_Push(flags, opt, cpy);
}

static void Option_PopOpt(char *optname) {
    Opt48 *os = Args_Pop(ARGFLAG_2);
    if (optname)
        strcpy(optname, os->e.o.curopt);
    free(os->e.o.curopt);
}

static void Option_PopList(void) {
    Args_Pop(ARGFLAG_1);
}

void Args_InitStack(void) {
    oStackPtr = 0;
}
int Args_StackSize(void) {
    return oStackPtr;
}

void Args_Push(short flags, void *first, void *second) {
    OS_ASSERT(104, oStackPtr<MAXSTACK);
    if (oStackPtr > 0)
    {
        short prev =
                (flags & ARGFLAG_1) ? ARGFLAG_2 :
                (flags & ARGFLAG_2) ? ARGFLAG_1 :
                (flags & ARGFLAG_4) ? ARGFLAG_2 : -1;
        OPTION_ASSERT(oStack[oStackPtr-1].flags & prev);
    }

    oStack[oStackPtr].e.v.first = first;
    oStack[oStackPtr].e.v.second = second;
    oStack[oStackPtr].flags = flags;
    oStackPtr++;
}

Opt48 *Args_Pop(short flags)
{
    OPTION_ASSERT(oStackPtr>0);
    --oStackPtr;
    OPTION_ASSERT(oStack[oStackPtr].flags & flags);
    return &oStack[oStackPtr];
}

void Args_SpellStack(char *buffer, short flags) {
    char *bptr;
    Opt48 *os;
    int sp;
    int level;

    bptr = buffer;
    sp = 0;
    level = 0;
    os = &oStack[sp];

    while (sp < oStackPtr) {
        if (!flags || !(os->flags & ARGFLAG_20)) {
            if (os->flags & ARGFLAG_4) {
                Opt48 *po = os - 1;
                if (!(os[-1].flags & ARGFLAG_40)) {
                    if ((level == 1 || level == 2) && !(po->flags & ARGFLAG_80))
                        *(bptr++) = (flags & ARGSPELLFLAG_20) ? '\n' : ' ';
                    os[-1].flags |= ARGFLAG_40;
                } else if (level == 2) {
                    *(bptr++) = ',';
                } else if (level == 3) {
                    *(bptr++) = '=';
                }
                strcpy(bptr, os->e.param);
                bptr += strlen(bptr);
            } else if (os->flags & ARGFLAG_2) {
                if (level == 1) {
                    *(bptr++) = MAINOPTCHAR[0];
                } else if (level == 2) {
                    Opt48 *po = os - 2;
                    if (!(os[-1].flags & ARGFLAG_40) && !(po->flags & ARGFLAG_80))
                        *(bptr++) = (flags & ARGSPELLFLAG_20) ? '\n' : ' ';
                }

                if (os[-1].flags & ARGFLAG_40) {
                    if (level == 2) {
                        if (flags & ARGSPELLFLAG_20)
                            *(bptr++) = ',';
                        else
                            *(bptr++) = ' ';
                    }
                } else {
                    if (level == 3) {
                        *(bptr++) = '=';
                    }
                }

                os[-1].flags |= ARGFLAG_40;
                strcpy(bptr, os->e.o.curopt);
                bptr += strlen(bptr);
            }

            if (flags & ARGSPELLFLAG_20)
                os->flags |= ARGFLAG_20;
        }

        if (os->flags & ARGFLAG_1)
            level++;

        ++sp;
        ++os;
    }
}

void Args_AddToToolArgs(anon0_50 *ta) {
    char buffer[4096];
    char *nptr;

    Args_SpellStack(buffer, ARGSPELLFLAG_20);
    nptr = strchr(buffer, '\n');
    if (nptr) {
        *(nptr++) = 0;
        Arg_AddToToolArgs(ta, 2, buffer);
        Arg_AddToToolArgs(ta, 1, 0);
    } else {
        nptr = buffer;
    }
    Arg_AddToToolArgs(ta, 2, nptr);
}

void Options_Init(void) {
    numoptionlists = 0;
    maxlegalset = 0;
    numlegalset = 0;
    numinternalset = 0;

    if (legalset.list)
        free(legalset.list);
    if (internalset.list)
        free(internalset.list);

    legalset.list = 0;
    legalset.flags =
            ((Option_ThisTool() & OTF_TOOL_COMPILER) ? LISTFLAGS_COMPILER : 0) |
                    ((Option_ThisTool() & OTF_TOOL_LINKER) ? LISTFLAGS_LINKER : 0) |
                    ((Option_ThisTool() & OTF_TOOL_DISASSEMBLER) ? LISTFLAGS_DISASSEMBLER : 0);
    internalset.list = 0;
    internalset.flags =
            ((Option_ThisTool() & OTF_TOOL_COMPILER) ? LISTFLAGS_COMPILER : 0) |
                    ((Option_ThisTool() & OTF_TOOL_LINKER) ? LISTFLAGS_LINKER : 0) |
                    ((Option_ThisTool() & OTF_TOOL_DISASSEMBLER) ? LISTFLAGS_DISASSEMBLER : 0);

    Args_InitStack();
}

OptionList *Options_GetOptions(void) {
    return &legalset;
}

void Options_SortOptions(void) {
    int r;

    if (numinternalset > 0) {
        legalset.list = (Option **) xrealloc("options", legalset.list, sizeof(Option *) * (numinternalset + 1));
        for (r = 0; r < numinternalset; r++) {
            if (internalset.list[r]->avail & (OTF_STICKY | OTF_CASED))
                legalset.list[numlegalset++] = internalset.list[r];
        }
        for (r = 0; r < numinternalset; r++) {
            if (!(internalset.list[r]->avail & (OTF_STICKY | OTF_CASED)))
                legalset.list[numlegalset++] = internalset.list[r];
        }
        legalset.list[numlegalset] = 0;

        if (internalset.list)
            free(internalset.list);
        internalset.list = 0;
        numinternalset = 0;
    }
}

static void Options_AddOption(Option *opt) {
    if (numinternalset >= maxlegalset) {
        maxlegalset += 32;
        internalset.list = (Option **) xrealloc("options", internalset.list, sizeof(Option *) * (maxlegalset + 1));
    }

    internalset.list[numinternalset++] = opt;
    internalset.list[numinternalset] = 0;
}

int Options_AddList(OptionList *optlst) {
    Option **ptr;

    if (numoptionlists >= 32)
        CLPFatalError("Too many option lists defined!");

    optionlists[numoptionlists++] = optlst;
    for (ptr = optlst->list; *ptr; ptr++)
        Options_AddOption(*ptr);

    return 1;
}

int Options_AddLists(OptionList **optlst) {
    int ret = 1;
    OptionList **ptr;

    for (ptr = optlst; *ptr; ptr++) {
        ret = Options_AddList(*ptr);
        if (!ret)
            return ret;
    }

    return ret;
}

static void Options_Reset(OptionList *optlst) {
    Option **os;

    os = optlst->list;
    if (os) {
        for (; *os; os++) {
            (*os)->avail &= ~(OTF_INTERNAL_ALREADY_SEEN | OTF_INTERNAL_SEEN_CONFLICTED);
        }
    }
}

static void Option_SpellList(char *buffer, OptionList *conflicts, int flags) {
    Option **scan;
    Boolean first;
    int total;
    char tmp[256];
    Option **next;
    int slflags;

    scan = conflicts->list;
    first = 1;
    total = 0;
    while (*scan) {
        next = scan + 1;
        if (!((*scan)->avail & (((parseopts.helpFlags & HELPFLAGS_SECRET) ? 0 : OTF_SECRET) | ((parseopts.helpFlags & HELPFLAGS_DEPRECATED) ? 0 : OTF_DEPRECATED) | OTF_SUBSTITUTED)) && (*scan)->names[0]) {
            if (!first)
                buffer += sprintf(buffer, ", ");
            if (first)
                first = 0;

            if (total > 1) {
                while (*next && (((*next)->avail & (((parseopts.helpFlags & HELPFLAGS_SECRET) ? 0 : OTF_SECRET) | ((parseopts.helpFlags & HELPFLAGS_DEPRECATED) ? 0 : OTF_DEPRECATED) | OTF_SUBSTITUTED)) || !(*next)->names[0])) {
                    ++next;
                }

                if (!*next)
                    buffer += sprintf(buffer, "or ");
            }

            slflags = (flags & OPTSPELLFLAG_2) ? SLFLAGS_2 : SLFLAGS_1;
            switch ((*scan)->avail & OTF_SLFLAGS_MASK) {
                case OTF_SLFLAGS_8:
                    slflags |= SLFLAGS_8;
                    break;
                case OTF_SLFLAGS_20:
                    slflags |= SLFLAGS_20;
                    break;
                case OTF_SLFLAGS_10:
                    slflags |= SLFLAGS_10;
                    break;
            }

            Utils_SpellList((*scan)->names, tmp, slflags);
            total++;
            buffer += sprintf(buffer, "%s", tmp);

            if ((*scan)->avail & OTF_HAS_SUB_OPTIONS)
                buffer += sprintf(buffer, " ...");
        }
        scan++;
    }
}

int Option_ForTool(Option *opt, int which) {
    return !which || (opt->avail & which);
}

int Option_ThisTool(void) {
    return (pTool->TYPE == CWDROPINCOMPILERTYPE) ? OTF_TOOL_COMPILER : OTF_TOOL_LINKER;
}

int Option_ForThisTool(Option *opt) {
    return !Option_ForTool(opt, OTF_TOOL_MASK) || Option_ForTool(opt, Option_ThisTool());
}

int Option_AlsoPassedToTool(Option *opt, int which) {
    return Option_ForThisTool(opt) && Option_ForTool(opt, which);
}

int Option_AlsoPassedFromThisTool(Option *opt) {
    return Option_ForThisTool(opt) && Option_ForTool(opt, ~Option_ThisTool() & OTF_TOOL_MASK);
}

static Boolean Option_ContinuesThisLevel(int level, ArgToken *tok) {
    ArgToken *tmp;
    int ret; // not in stabs but i think this exists

    if (level == 1) {
        return (tok->val == ATK_ARG_END) || (tok->val == ATK_OPTION) || (tok->val == ATK_ARG);
    } else if (level == 2) {
        tmp = Arg_UsedToken();
        ret = (tok->val == ATK_COMMA && tmp->val != ATK_OPTION) || (tok->val == ATK_ARG && tmp->val != ATK_ARG_END);
        Arg_UndoToken();
        return ret;
    } else if (level == 3) {
        return (tok->val == ATK_EQUALS) || (tok->val == ATK_ARG);
    } else {
        return 0;
    }
}

static short endingStack[5][3];
static Boolean Option_IsEndingThisLevel(int level, ArgToken *tok) {
    ArgToken *tmp;

    if (!tok)
        return 1;
    if (tok->val == endingStack[level][0])
        return 1;

    if (endingStack[level][1] && tok->val == endingStack[level][1]) {
        tmp = Arg_UsedToken();
        if (tmp && tmp->val == endingStack[level][2]) {
            Arg_UndoToken();
            return 1;
        }
        Arg_UndoToken();
    }

    return 0;
}

static Boolean Option_IsEndingLevel(int level, ArgToken *tok) {
    if (!tok)
        return 1;

    while (level > 0) {
        if (Option_IsEndingThisLevel(level - 1, tok))
            return 1;
        level--;
    }

    return 0;
}

int Option_Parse(Option *opt, int oflags) {
    int ret;
    int pushed;
    int samelevel;
    int subparse;
    int flags;
    char errstr[1024];
    Option **cscan;
    Option **scan;
    int goingtosubparse;
    ArgToken *tok;

    ret = 1;
    pushed = 0;
    samelevel = (opt->avail & OTF_GLOBAL) == (oflags & OFLAGS_1);
    subparse = (oflags & OFLAGS_2) != 0;
    flags = 0;
    if (subparse) flags |= PFLAGS_4;
    if (oflags & OFLAGS_8) flags |= PFLAGS_8;
    if (oflags & OFLAGS_40) flags |= PFLAGS_1;

    if (curopt[0]) {
        pushed = 1;
        Option_PushOpt(opt, curopt);
    }

    if (samelevel) {
        if (!(flags & PFLAGS_1)) {
            if ((opt->avail & OTF_INTERNAL_ALREADY_SEEN) && (opt->avail & OTF_ONLY_ONCE)) {
                Option_Warning(CLPStr30_OptionShouldNotBeSpecifiedMultipleTimes);
            } else if (opt->avail & OTF_HAS_CONFLICTS) {
                cscan = opt->conflicts->list;
                while (*cscan && (*cscan == opt || !((*cscan)->avail & OTF_INTERNAL_ALREADY_SEEN))) {
                    ++cscan;
                }

                if (*cscan && *cscan != opt) {
                    (*cscan)->avail &= ~OTF_INTERNAL_ALREADY_SEEN;
                    Option_SpellList(errstr, opt->conflicts, oflags);
                    if (opt->conflicts->help)
                        Option_Warning(CLPStr32_OptionOverridesEffectWithHelp, (*cscan)->names, errstr, opt->conflicts->help);
                    else
                        Option_Warning(CLPStr31_OptionOverridesEffect, (*cscan)->names, errstr);
                }
            }
        }

        if (Option_ThisTool() == OTF_TOOL_COMPILER && Option_ForTool(opt, OTF_TOOL_LINKER | OTF_TOOL_DISASSEMBLER)) {
            flags |= PFLAGS_2;
            if (!Option_ForThisTool(opt))
                flags |= PFLAGS_1;
            if (!subparse)
                Arg_AddToToolArgs(&linkargs, ATK_ARG_END, 0);
            Args_AddToToolArgs(&linkargs);
        }

        if (!(flags & PFLAGS_1)) {
            if (opt->avail & OTF_OBSOLETE) {
                if (opt->help)
                    Option_Error(CLPStr22_OptionObsoleteWithHelp, opt->help);
                else
                    Option_Error(CLPStr21_OptionObsolete);
                flags |= PFLAGS_1;
            }

            if (opt->avail & OTF_IGNORED) {
                if (!(opt->avail & (OTF_WARNING | OTF_MEANINGLESS))) {
                    if (opt->help)
                        Option_Warning(CLPStr27_OptionIgnoredWithText, opt->help);
                    else
                        Option_Warning(CLPStr26_OptionIgnored);
                }
                flags |= PFLAGS_1;
            } else if (opt->avail & OTF_SUBSTITUTED) {
                Option_Warning(CLPStr23_OptionXSubstitutedWithX, curopt, opt->help);
            } else if (opt->avail & OTF_DEPRECATED) {
                if (opt->help)
                    Option_Warning(CLPStr25_OptionDeprecatedWithHelp, opt->help);
                else
                    Option_Warning(CLPStr24_OptionDeprecated);
            }

            if (opt->avail & OTF_WARNING)
                Option_Warning(CLPStr28_WarningText, opt->help);
            if (opt->avail & OTF_MEANINGLESS)
                Option_Warning(CLPStr29_OptionHasNoEffect);
        }

        opt->avail |= OTF_INTERNAL_ALREADY_SEEN;
        if (opt->avail & OTF_HAS_CONFLICTS) {
            scan = opt->conflicts->list;
            opt->avail |= OTF_INTERNAL_SEEN_CONFLICTED;
            while (*scan) {
                (*scan)->avail |= OTF_INTERNAL_SEEN_CONFLICTED;
                scan++;
            }
        }
    } else {
        flags |= PFLAGS_1;
    }

    goingtosubparse = opt->avail & OTF_HAS_SUB_OPTIONS;
    if (opt->param) {
        ret = Params_Parse(opt->param, flags | (goingtosubparse ? PFLAGS_20 : 0));
    } else {
        tok = Arg_PeekToken();
        if (tok && tok->val == ATK_EQUALS)
            Arg_UsedToken();
    }

    if (ret && goingtosubparse) {
        ret = ret && Options_Parse(
                opt->sub,
                (oflags & ~OFLAGS_4)
                | OFLAGS_2
                    | ((flags & PFLAGS_1) ? OFLAGS_40 : 0)
                      | (subparse ? OFLAGS_10 : 0)
                      | ((opt->avail & OTF_SUB_OPTIONS_OPTIONAL) ? OFLAGS_4 : 0)
        );
    }

    if (pushed)
        Option_PopOpt(curopt);

    if (Option_ThisTool() == OTF_TOOL_COMPILER && !subparse)
        Arg_AddToToolArgs(&linkargs, ATK_ARG_END, 0);

    return ret;
}

static int Option_MatchString(char *list, char *str, int flags, int *result) {
    int str_len;
    char cpy[64];

    if (result)
        *result = 0;

    if (!list[0] && !str[0])
        return 1;

    while (*list) {
        if (Utils_CompareOptionString(list, str, flags & OTF_CASED, 0))
            return 1;

        switch (flags & OTF_SLFLAGS_MASK) {
            case OTF_SLFLAGS_8:
                if (my_tolower(str[0]) == 'n' && my_tolower(str[1]) == 'o' && Utils_CompareOptionString(list, str + 2, flags & OTF_CASED, 0)) {
                    if (result)
                        *result |= 0x100000;
                    return 1;
                }
                break;
            case OTF_SLFLAGS_20:
                if (my_tolower(str[0]) == 'n' && my_tolower(str[1]) == 'o' && str[2] == '-' && Utils_CompareOptionString(list, str + 3, flags & OTF_CASED, 0)) {
                    if (result)
                        *result |= 0x400000;
                    return 1;
                }
                break;
            case OTF_SLFLAGS_10:
                str_len = strlen(str);
                if (str[str_len - 1] == '-') {
                    strcpy(cpy, str);
                    cpy[str_len - 1] = 0;
                    if (Utils_CompareOptionString(list, cpy, flags & OTF_CASED, 0)) {
                        if (result)
                            *result |= 0x200000;
                        return 1;
                    }
                }
                break;
        }

        while (*list && *list != '|')
            ++list;

        if (*list)
            ++list;
        if (*list == '|')
            ++list;
    }

    return 0;
}

static Option *Option_Lookup(OptionList *search, int unk, int *flags) {
    Option **os;
    Option *stickyopt;
    int stickyflags;
    Boolean matched;
    char *names;

    os = search->list;
    stickyopt = 0;
    stickyflags = *flags;

    if (os) {
        while (*os) {
            names = (*os)->names;
            if (((*os)->avail & OTF_STICKY) == OTF_STICKY) {
                while (*names && *names != '|')
                    ++names;
                if (*names)
                    ++names;
                if (*names == '|')
                    ++names;
            }

            matched = Option_MatchString(names, curopt, (*os)->avail & (OTF_SLFLAGS_MASK | OTF_CASED), flags) && (*names || names == (*os)->names);
            if (matched) {
                if (!stickyopt || (*os)->names[0] == curopt[0] || strlen(curopt) > 1)
                    return *os;
            }

            if ((*os)->avail & OTF_STICKY) {
                matched = Utils_CompareOptionString((*os)->names, curopt, (*os)->avail & OTF_CASED, 2);
                if (matched)
                    stickyflags |= OTF_STICKY;
            } else {
                matched = 0;
            }

            if (matched)
                stickyopt = *os;

            ++os;
        }
    }

    *flags = stickyflags;
    return stickyopt;
}

static int Options_DoParse(OptionList *search, int flags) {
    // search: r26 *n
    // flags: r28 *n
    int haderrors; // r30 *n
    int parsedany; // r23 *n
    int failed; // r24 *n
    int matchflags; // stack 0x38
    int subparse; // r20 *n
    ArgToken *starttok; // r0 (actually r19 i think?)
    int mystery_r31; // figure out what var this actually is
    ArgToken *tok; // r25 *n
    ArgToken *opttok; // r27 *n
    ArgToken *token_r18; // r18 MAYBE????
    Option *opt; // r16 *n
    Boolean isOpt; // r0
    char *lptr; // r17 *n
    char *optname; // r16 *n

    // 915
    haderrors = 0;
    // 917
    failed = 0;
    // 918
    matchflags = 0;
    // 920
    subparse = (flags & OFLAGS_2) != 0;
    // 921
    mystery_r31 = subparse && (flags & OFLAGS_10);
    // 925
    opttok = 0;
    // 929
    mystery_r31 = (subparse == 0) ? 1 : (mystery_r31 == 0) ? 2 : 3;

    starttok = Arg_PeekToken(); // i think this is starttok
    while ((token_r18 = Arg_PeekToken())) {
        parsedany = 0;
        isOpt = ((mystery_r31 == 1) && (token_r18->val == ATK_OPTION)) || ((mystery_r31 == 2) && (token_r18->val == ATK_ARG) && (token_r18->text[0] || search->flags & LISTFLAGS_4)) || ((mystery_r31 == 3) && (token_r18->val == ATK_EQUALS));
        // 950 17CFD4
        if ((mystery_r31 == 3) && isOpt) {
            token_r18 = Arg_UsedToken();
            isOpt = token_r18 && (token_r18->val == ATK_ARG);
            flags &= ~OFLAGS_4;
        }
        // 957 17D00C
        if (isOpt) {
            // 959
            opt = 0;
            // 960
            Arg_GetTokenText(token_r18, curopt, sizeof(curopt), 0);
            // 963
            if (curopt[0]) {
                opt = Option_Lookup(search, 0x700000, &matchflags);
                if (opt) {
                    opttok = token_r18;
                    if (!(matchflags & 2)) {
                        // 972
                        if (token_r18->val == ATK_OPTION)
                            Arg_UsedToken();
                        token_r18 = Arg_UsedToken();
                    } else {
                        lptr = opt->names;
                        optname = token_r18->text;
                        while (*lptr && *lptr != '|')
                            ++lptr;
                        token_r18 = Arg_UsedToken();

                        if (!subparse)
                            strcpy(token_r18->text, optname + (lptr - opt->names));

                        curopt[(lptr - opt->names)] = 0;

                        if (!token_r18->text || !token_r18->text[0]) {
                            Option_PushOpt(0, curopt);
                            Option_ParamError(CLPStr34_ArgumentsExpected, curopt);
                            Option_PopOpt(0);
                            return 0;
                        }
                    }
                }
            }

            // 1006
            if (!opt) {
                // 1009
                if (search->flags & LISTFLAGS_4) {
                    char saveopt[1024]; // stack 0xBC
                    strcpy(saveopt, curopt);
                    curopt[0] = 0;
                    opt = Option_Lookup(search, 0, &matchflags);
                    strcpy(curopt, token_r18->text);

                    // 1019
                    if (opt) {
                        if (opt->names[0])
                            token_r18 = Arg_UsedToken();
                        if (token_r18->val == ATK_EQUALS)
                            Arg_UsedToken();
                        haderrors = Option_Parse(opt, flags) == 0;
                        parsedany = 1;
                        if (haderrors)
                            failed = 1;
                        opt = 0;
                    } else {
                        CLPFatalError("Missing default for variable list");
                        return 0;
                    }
                    // 1041
                    strcpy(curopt, saveopt);
                } else if (!opt) {
                    // 1059
                    curopt[0] = 0;
                    // 1061
                    if (mystery_r31 > 1) {
                        if ((flags & OFLAGS_4) && token_r18 == starttok)
                            return haderrors == 0;
                        // 1072
                        if (search->flags & LISTFLAGS_ALLOW_UNKNOWNS) {
                            if (!(flags & OFLAGS_1)) {
                                Option_SpellList(curparam, search, flags);
                                Option_Warning(CLPStr20_UnknownOptionX_ExpectedOneOfX, token_r18->text, curparam);
                            }
                            Arg_UsedToken();
                            parsedany = 1;
                        } else {
                            // 1090
                            Option_SpellList(curparam, search, flags);
                            Option_Error(CLPStr20_UnknownOptionX_ExpectedOneOfX, token_r18->text, curparam);
                            failed = 1;
                            haderrors++;
                        }
                    } else {
                        // 1099
                        if ((search->flags & LISTFLAGS_ALLOW_UNKNOWNS) || parseopts.ignoreUnknown) {
                            // 1101
                            if (!(flags & OFLAGS_1))
                                Option_Warning(CLPStr19_UnknownOptionX, token_r18->text);
                            Arg_UsedToken();
                            Arg_GetToken();
                            parsedany = 1;
                        } else {
                            // 1115
                            Option_Error(CLPStr19_UnknownOptionX, token_r18->text);
                            failed = 1;
                            haderrors++;
                        }
                    }
                }
            }

            // 1126 - after_if_1006
            if (!haderrors && !failed && opt) {
                flags &= ~OFLAGS_8;
                if (matchflags & 0x700000)
                    flags |= OFLAGS_8;
                haderrors = Option_Parse(opt, flags) == 0;
                if (haderrors)
                    failed = 1;
                parsedany++;
            } // else: goto 1229
        } else if ((mystery_r31 == 1) && (token_r18->val == ATK_ARG)) {
            // 1142
            opttok = 0;
            curopt[0] = 0;
            opt = Option_Lookup(search, 0, &matchflags);
            strcpy(curopt, token_r18->text);
            if (!opt) {
                Option_Warning(CLPStr33_NoDefaultHandlerSetUpForX_Ignoring, curopt);
                failed = 1;
            } else {
                if (!(flags & OFLAGS_1)) {
                    haderrors = Option_Parse(opt, flags) == 0;
                } else {
                    parseopts.possibleFiles++;
                    haderrors = 0;
                }
                parsedany++;
                if (haderrors)
                    failed = 1;
                else
                    Arg_UsedToken();
            }
        } else if ((mystery_r31 > 1) && Option_IsEndingLevel(mystery_r31, token_r18)) {
            // 1193
            Option *opt;
            char saveopt[64]; // stack 0x7C
            strcpy(saveopt, curopt);
            if (!(search->flags & LISTFLAGS_4)) {
                curopt[0] = 0;
                opt = Option_Lookup(search, 0, &matchflags); // probably wrong result reg
            } else {
                opt = 0; // probably wrong reg
            }
            // 1203
            if (!opt) {
                // 1205
                if (!(flags & OFLAGS_4)) {
                    Option_Error(CLPStr34_ArgumentsExpected, saveopt);
                    failed = 1;
                    haderrors++;
                } else {
                    strcpy(curopt, saveopt);
                    break;
                }
            } else {
                // 1219
                haderrors = Option_Parse(opt, flags) == 0;
                parsedany = 1;
                if (haderrors)
                    failed = 1;
            }
            // 1224
            strcpy(curopt, saveopt);
        }

        // 1229 after_if_1126
        // This is where tok comes into play.
        tok = Arg_PeekToken();
        // 1231
        if (!failed) {
            if (tok && (tok->val == ATK_ARG) && (matchflags & 2)) {
                // 1235
                ArgToken *prev; // r16
                char sticky[64]; // stack 0x3C
                prev = Arg_UndoToken();
                tok = Arg_UsedToken();
                if (tok->text[0] && prev == opttok) {
                    if (opttok) {
                        strcpy(sticky, opttok->text);
                        sticky[strlen(tok->text)] = 0;
                        Option_PushOpt(0, sticky);
                        Param_Error(CLPStr36_UnexpectedAdditionalArgumentX, Arg_GetTokenName(tok));
                        Option_PopOpt(0);
                    } else {
                        CLPReportError(CLPStr36_UnexpectedAdditionalArgumentX, Arg_GetTokenName(tok));
                    }
                    // 1251
                    haderrors++;
                    // goes to 1323
                } else {
                    // 1256
                    if (!tok->text[0])
                        tok = Arg_UsedToken();
                    // 1257
                    if (flags & OFLAGS_1)
                        parseopts.possibleFiles++;
                    // goes to 1323
                }
            } else {
                // 1267
                if (Option_IsEndingThisLevel(mystery_r31 - 1, tok))
                    break;
                if (Option_IsEndingThisLevel(mystery_r31 + 1, tok)) {
                    // 1276
                    ArgToken *prev = tok; // r16
                    tok = Arg_UsedToken();
                    // 1278
                    if ((mystery_r31 != 1) || (tok->val != ATK_OPTION)) {
                        // 1280
                        if (opttok) {
                            Option_PushOpt(0, opttok->text);
                            if (tok->val == ATK_ARG)
                                Param_Error(CLPStr36_UnexpectedAdditionalArgumentX, Arg_GetTokenName(tok));
                            else
                                Param_Error(CLPStr35_TokenXNotExpected, Arg_GetTokenName(prev));
                            Option_PopOpt(opttok->text);
                        } else if (tok->val == ATK_ARG) {
                            // 1292
                            CLPReportError(CLPStr36_UnexpectedAdditionalArgumentX, Arg_GetTokenName(tok));
                        } else {
                            // 1294
                            CLPReportError(CLPStr35_TokenXNotExpected, Arg_GetTokenName(prev));
                        }
                        haderrors++;
                        failed++;
                    }
                    // goto 1323
                } else if ((mystery_r31 < 2) && Option_IsEndingThisLevel(mystery_r31 + 2, tok)) {
                    // 1303
                    if (opttok) {
                        Option_PushOpt(0, opttok->text);
                        if (tok->val == ATK_ARG)
                            Param_Error(CLPStr36_UnexpectedAdditionalArgumentX, Arg_GetTokenName(tok));
                        else
                            Param_Error(CLPStr35_TokenXNotExpected, Arg_GetTokenName(tok));
                        Option_PopOpt(opttok->text);
                    } else if (tok->val == ATK_ARG) {
                        CLPReportError(CLPStr36_UnexpectedAdditionalArgumentX, Arg_GetTokenName(tok));
                    } else {
                        CLPReportError(CLPStr35_TokenXNotExpected, Arg_GetTokenName(tok));
                    }
                    haderrors++;
                    failed++;
                }
            }
        } // else: 1323

        if (haderrors || failed) {
            while (!Option_IsEndingLevel(mystery_r31, tok))
                tok = Arg_GetToken();
            if (!tok)
                tok = Arg_UndoToken();
            OS_ASSERT(1335, tok);
        }

        if (!parsedany || haderrors)
            break;

        if (Option_IsEndingThisLevel(mystery_r31, tok))
            Arg_UsedToken();
        else if (!Option_ContinuesThisLevel(mystery_r31, tok))
            break;
    }

    return haderrors == 0;
}

int Options_Parse(OptionList *options, int flags) {
    // options: r30
    // flags: r31
    int ret; // r31
    char savecuropt[64]; // stack 0x3C

    Options_Reset(options);
    Option_PushList(options);

    if (!(flags & 2)) {
        ret = Options_DoParse(options, flags);
        if (Option_ThisTool() == OTF_TOOL_COMPILER)
            Arg_AddToToolArgs(&linkargs, 1, 0);
    } else {
        strcpy(savecuropt, curopt);
        ret = Options_DoParse(options, flags);
        strcpy(curopt, savecuropt);
    }

    Option_PopList();
    return ret;
}

int Option_ParseDefaultOption(OptionList *options) {
    // options: r31
    int ret; // r31
    Option *dopt; // r0
    int matchflags; // 0x3C

    Options_Reset(options);
    Option_PushList(options);

    strcpy(curopt, "defaultoptions");
    dopt = Option_Lookup(options, 0, &matchflags);
    if (!dopt) {
        CLPFatalError("Default options not defined");
        ret = 1;
    } else {
        ret = Option_Parse(dopt, 0);
    }

    Option_PopList();
    return ret;
}

void Option_ParamError(short id, va_list ap) {
    char buf[4096];

    CLPGetErrorString(id, buf);
    sprintf(&buf[strlen(buf)], "\nwhile parsing option '");
    Args_SpellStack(&buf[strlen(buf)], 0);
    sprintf(&buf[strlen(buf)], "'");
    CLPReportError_V(buf, ap);
}

void Option_ParamWarning(short id, va_list ap) {
    char buf[1024];

    CLPGetErrorString(id, buf);
    sprintf(&buf[strlen(buf)], "\nwhile parsing option '");
    Args_SpellStack(&buf[strlen(buf)], 0);
    sprintf(&buf[strlen(buf)], "'");
    CLPReportWarning_V(buf, ap);
}

void Option_OptionError(short id, va_list ap) {
    char buf[1024];

    CLPGetErrorString(id, buf);
    if (Args_StackSize() >= 2) {
        sprintf(&buf[strlen(buf)], "\nwhile parsing option '");
        Args_SpellStack(&buf[strlen(buf)], 0);
        sprintf(&buf[strlen(buf)], "'");
    }
    CLPReportError_V(buf, ap);
}

void Option_OptionWarning(short id, va_list ap) {
    char buf[1024];

    CLPGetErrorString(id, buf);
    if (Args_StackSize() >= 2) {
        sprintf(&buf[strlen(buf)], "\nwhile parsing option '");
        Args_SpellStack(&buf[strlen(buf)], 0);
        sprintf(&buf[strlen(buf)], "'");
    }
    CLPReportWarning_V(buf, ap);
}

void Option_Error(short id, ...) {
    va_list va;
    va_start(va, id);
    Option_OptionError(id, va);
    va_end(va);
}

void Option_Warning(short id, ...) {
    va_list va;
    va_start(va, id);
    Option_OptionWarning(id, va);
    va_end(va);
}

int Options_Help(const char *keyword) {
    // keyword: r31
    int scan; // r26
    OptionList *lst; // r25

    Help_Init();

    if (parseopts.helpFlags & HELPFLAGS_USAGE) {
        ShowVersion(1);
        Help_Line('=');
        Help_Usage();
    } else {
        ShowVersion(1);
        for (scan = 0; scan < numoptionlists; scan++) {
            if ((lst = optionlists[scan])) {
                if (parseopts.helpFlags & HELPFLAGS_8000) {
                    if (keyword && keyword[0] && lst->help && strstr(lst->help, keyword))
                        Help_Options(lst, 0, "");
                } else {
                    Help_Options(lst, 0, keyword);
                }
            }
        }
    }

    Help_Term();
    return 1;
}

int Option_Help(const char *opt) {
    // opt: r31
    Option *find; // r29
    int matchflags; // stack 0x3C
    int ret; // r29

    find = 0;
    Option_PushList(Options_GetOptions());
    Option_PushOpt(0, "help");
    if (opt[0] == MAINOPTCHAR[0])
        strcpy(curopt, opt + 1);
    else
        strcpy(curopt, opt);

    if (!curopt[1])
        find = Option_Lookup(Options_GetOptions(), 0x700002, &matchflags);
    if (!find)
        find = Option_Lookup(Options_GetOptions(), 0x700000, &matchflags);

    if (find) {
        Help_Init();
        if (!Help_Option(Options_GetOptions(), find, 0, ""))
            CLPReportWarning(CLPStr38_NoHelpAvailableForOptionX, opt);
        Help_Term();
        ret = 1;
    } else {
        Option_Error(CLPStr19_UnknownOptionX, opt);
        ret = 0;
    }

    Option_PopOpt(curopt);
    Option_PopList();
    return ret;
}

int Options_DisplayHelp(void) {
    if (parseopts.helpFlags & HELPFLAGS_1)
        return Option_Help(parseopts.helpKey);
    else
        return Options_Help(parseopts.helpKey);
}