/* Copyright (C) 2001-2023 Artifex Software, Inc.

   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or

   implied.

   This software is distributed under license and may not be copied,

   modified or distributed except as expressly authorized under the terms

   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact

   Artifex Software, Inc.,  39 Mesa Street, Suite 108A, San Francisco,

   CA 94129, USA, for further information.

*/

/* Utilities for getting parameters out of dictionaries. */

#include "memory_.h"

#include "string_.h"    /* for strlen */

#include "ghost.h"

#include "ierrors.h"

#include "gsmatrix.h"   /* for dict_matrix_param */

#include "gsuid.h"

#include "dstack.h"             /* for systemdict */

#include "idict.h"

#include "iddict.h"

#include "idparam.h"    /* interface definition */

#include "ilevel.h"

#include "imemory.h"    /* for iutil.h */

#include "iname.h"

#include "iutil.h"

#include "oper.h"   /* for check_proc */

#include "store.h"    /* for making empty proc */

/* Get a Boolean parameter from a dictionary. */

/* Return 0 if found, 1 if defaulted, <0 if wrong type. */

int

dict_bool_param(const ref * pdict, const char *kstr,

                bool defaultval, bool * pvalue)

{

    ref *pdval;

    if (pdict == 0 || dict_find_string(pdict, kstr, &pdval) <= 0) {

        *pvalue = defaultval;

        return 1;

    }

    if (!r_has_type(pdval, t_boolean))

        return_error(gs_error_typecheck);

    *pvalue = pdval->value.boolval;

    return 0;

}

/* Get an integer or null parameter from a dictionary. */

/* Return 0 if found, 1 if defaulted, <0 if invalid. */

/* If the parameter is null, return 2 without setting *pvalue. */

/* Note that the default value may be out of range, in which case */

/* a missing value will return gs_error_undefined rather than 1. */

int

dict_int_null_param(const ref * pdict, const char *kstr, int minval,

                    int maxval, int defaultval, int *pvalue)

{

    ref *pdval;

    int code, ival;

    if (pdict == 0 || dict_find_string(pdict, kstr, &pdval) <= 0) {

        ival = defaultval;

        code = 1;

    } else {

        switch (r_type(pdval)) {

            case t_integer:

                if (pdval->value.intval < minval || pdval->value.intval > maxval)

                    return_error(gs_error_rangecheck);

                ival = pdval->value.intval;

                break;

            case t_real:

                /* Allow an integral real, because Fontographer */

                /* (which violates the Adobe specs in other ways */

                /* as well) sometimes generates output that */

                /* needs this. */

                if (pdval->value.realval < minval || pdval->value.realval > maxval)

                    return_error(gs_error_rangecheck);

                ival = (long)pdval->value.realval;

                if (ival != pdval->value.realval)

                    return_error(gs_error_rangecheck);

                break;

            case t_null:

                return 2;

            default:

                return_error(gs_error_typecheck);

        }

        code = 0;

    }

    if (ival < minval || ival > maxval) {

        if (code == 1)

            return_error(gs_error_undefined);

        else

            return_error(gs_error_rangecheck);

    }

    *pvalue = (int)ival;

    return code;

}

/* Get an integer parameter from a dictionary. */

/* Return like dict_int_null_param, but return gs_error_typecheck for null. */

int

dict_int_param(const ref * pdict, const char *kstr, int minval, int maxval,

               int defaultval, int *pvalue)

{

    int code = dict_int_null_param(pdict, kstr, minval, maxval,

                                   defaultval, pvalue);

    return (code == 2 ? gs_note_error(gs_error_typecheck) : code);

}

/* Get an unsigned integer parameter from a dictionary. */

/* Return 0 if found, 1 if defaulted, <0 if invalid. */

/* Note that the default value may be out of range, in which case */

/* a missing value will return gs_error_undefined rather than 1. */

int

dict_uint_param(const ref * pdict, const char *kstr,

                uint minval, uint maxval, uint defaultval, uint * pvalue)

{

    ref *pdval;

    int code;

    uint ival;

    if (pdict == 0 || dict_find_string(pdict, kstr, &pdval) <= 0) {

        ival = defaultval;

        code = 1;

    } else {

        check_type_only(*pdval, t_integer);

        if (pdval->value.intval != (uint) pdval->value.intval)

            return_error(gs_error_rangecheck);

        ival = (uint) pdval->value.intval;

        code = 0;

    }

    if (ival < minval || ival > maxval) {

        if (code == 1)

            return_error(gs_error_undefined);

        else

            return_error(gs_error_rangecheck);

    }

    *pvalue = ival;

    return code;

}

/* Get a float parameter from a dictionary. */

/* Return 0 if found, 1 if defaulted, <0 if wrong type. */

int

dict_float_param(const ref * pdict, const char *kstr,

                 double defaultval, float *pvalue)

{

    ref *pdval;

    if (pdict == 0 || dict_find_string(pdict, kstr, &pdval) <= 0) {

        *pvalue = defaultval;

        return 1;

    }

    switch (r_type(pdval)) {

        case t_integer:

            *pvalue = (float)pdval->value.intval;

            return 0;

        case t_real:

            *pvalue = pdval->value.realval;

            return 0;

    }

    return_error(gs_error_typecheck);

}

/* Get an integer array from a dictionary. */

/* See idparam.h for specification. */

int

dict_int_array_check_param(const gs_memory_t *mem, const ref * pdict,

   const char *kstr, uint len, int *ivec, int under_error, int over_error)

{

    ref pa, *pdval;

    uint size;

    int i, code;

    if (pdict == 0 || dict_find_string(pdict, kstr, &pdval) <= 0)

        return 0;

    if (!r_is_array(pdval))

        return_error(gs_error_typecheck);

    size = r_size(pdval);

    if (size > len)

        return_error(over_error);

    for (i = 0; i < size; i++) {

        code = array_get(mem, pdval, i, &pa);

        if (code < 0)

            return code;

        /* See dict_int_param above for why we allow reals here. */

        switch (r_type(&pa)) {

            case t_integer:

                if (pa.value.intval != (int)pa.value.intval)

                    return_error(gs_error_rangecheck);

                ivec[i] = (int)pa.value.intval;

                break;

            case t_real:

                if (pa.value.realval < min_int ||

                    pa.value.realval > max_int ||

                    pa.value.realval != (int)pa.value.realval

                    )

                    return_error(gs_error_rangecheck);

                ivec[i] = (int)pa.value.realval;

                break;

            default:

                return_error(gs_error_typecheck);

        }

    }

    return (size == len || under_error >= 0 ? size :

            gs_note_error(under_error));

}

int

dict_int_array_param(const gs_memory_t *mem, const ref * pdict,

   const char *kstr, uint maxlen, int *ivec)

{

    return dict_int_array_check_param(mem, pdict, kstr, maxlen, ivec,

                                      0, gs_error_limitcheck);

}

int

dict_ints_param(const gs_memory_t *mem, const ref * pdict,

   const char *kstr, uint len, int *ivec)

{

    return dict_int_array_check_param(mem, pdict, kstr, len, ivec,

                                      gs_error_rangecheck, gs_error_rangecheck);

}

/* Get a float array from a dictionary. */

/* Return the element count if OK, <0 if invalid. */

/* If the parameter is missing, then if defaultvec is NULL, return 0; */

/* if defaultvec is not NULL, copy it into fvec (maxlen elements) */

/* and return maxlen. */

int

dict_float_array_check_param(const gs_memory_t *mem,

                             const ref * pdict, const char *kstr,

                             uint len, float *fvec, const float *defaultvec,

                             int under_error, int over_error)

{

    ref *pdval;

    uint size;

    int code;

    if (pdict == 0 || dict_find_string(pdict, kstr, &pdval) <= 0) {

        if (defaultvec == NULL)

            return 0;

        memcpy(fvec, defaultvec, len * sizeof(float));

        return len;

    }

    if (!r_is_array(pdval))

        return_error(gs_error_typecheck);

    size = r_size(pdval);

    if (size > len)

        return_error(over_error);

    code = process_float_array(mem, pdval, size, fvec);

    return (code < 0 ? code :

            size == len || under_error >= 0 ? size :

            gs_note_error(under_error));

}

int

dict_float_array_param(const gs_memory_t *mem,

                       const ref * pdict, const char *kstr,

                       uint maxlen, float *fvec, const float *defaultvec)

{

    return dict_float_array_check_param(mem ,pdict, kstr, maxlen, fvec,

                                        defaultvec, 0, gs_error_limitcheck);

}

int

dict_floats_param(const gs_memory_t *mem,

                  const ref * pdict, const char *kstr,

                  uint maxlen, float *fvec, const float *defaultvec)

{

    return dict_float_array_check_param(mem, pdict, kstr, maxlen,

                                        fvec, defaultvec,

                                        gs_error_rangecheck, gs_error_rangecheck);

}

/* Do dict_floats_param() and store [/key any] array in $error.errorinfo

 * on failure. The key must be a permanently allocated C string.

 */

int

dict_floats_param_errorinfo(i_ctx_t *i_ctx_p,

                  const ref * pdict, const char *kstr,

                  uint maxlen, float *fvec, const float *defaultvec)

{

    ref *val;

    int code = dict_float_array_check_param(imemory, pdict, kstr, maxlen,

                              fvec, defaultvec, gs_error_rangecheck, gs_error_rangecheck);

    if (code < 0) {

       if (dict_find_string(pdict, kstr, &val) > 0)

          gs_errorinfo_put_pair(i_ctx_p, kstr, strlen(kstr), val);

    }

    return code;

}

/*

 * Get a procedure from a dictionary.  If the key is missing,

 *      defaultval = false means substitute t__invalid;

 *      defaultval = true means substitute an empty procedure.

 * In either case, return 1.

 */

int

dict_proc_param(const ref * pdict, const char *kstr, ref * pproc,

                bool defaultval)

{

    ref *pdval;

    if (pdict == 0 || dict_find_string(pdict, kstr, &pdval) <= 0) {

        if (defaultval)

            make_empty_const_array(pproc, a_readonly + a_executable);

        else

            make_t(pproc, t__invalid);

        return 1;

    }

    check_proc(*pdval);

    *pproc = *pdval;

    return 0;

}

/* Get a matrix from a dictionary. */

int

dict_matrix_param(const gs_memory_t *mem, const ref * pdict, const char *kstr, gs_matrix * pmat)

{

    ref *pdval;

    if (pdict == 0 || dict_find_string(pdict, kstr, &pdval) <= 0)

        return_error(gs_error_typecheck);

    return read_matrix(mem, pdval, pmat);

}

/* Get a UniqueID or XUID from a dictionary. */

/* Return 0 if UniqueID, 1 if XUID, <0 if error. */

/* If there is no uid, return default. */

int

dict_uid_param(const ref * pdict, gs_uid * puid, int defaultval,

               gs_memory_t * mem, const i_ctx_t *i_ctx_p)

{

    ref *puniqueid;

    if (pdict == 0) {

        uid_set_invalid(puid);

        return defaultval;

    }

    /* In a Level 2 environment, check for XUID first. */

    if (level2_enabled &&

        dict_find_string(pdict, "XUID", &puniqueid) > 0

        ) {

        long *xvalues;

        uint size, i;

        if (!r_has_type(puniqueid, t_array))

            return_error(gs_error_typecheck);

        size = r_size(puniqueid);

        if (size == 0)

            return_error(gs_error_rangecheck);

        xvalues = (long *)gs_alloc_byte_array(mem, size, sizeof(long),

                                              "get XUID");

        if (xvalues == 0)

            return_error(gs_error_VMerror);

        /* Get the values from the XUID array. */

        for (i = 0; i < size; i++) {

            const ref *pvalue = puniqueid->value.const_refs + i;

            if (!r_has_type(pvalue, t_integer)) {

                gs_free_object(mem, xvalues, "get XUID");

                return_error(gs_error_typecheck);

            }

            xvalues[i] = pvalue->value.intval;

        }

        uid_set_XUID(puid, xvalues, size);

        return 1;

    }

    /* If no UniqueID entry, set the UID to invalid, */

    /* because UniqueID need not be present in all fonts, */

    /* and if it is, the legal range is 0 to 2^24-1. */

    if (dict_find_string(pdict, "UniqueID", &puniqueid) <= 0) {

        uid_set_invalid(puid);

        return defaultval;

    } else {

        if (!r_has_type(puniqueid, t_integer))

           return_error(gs_error_typecheck);

        if (puniqueid->value.intval < 0 || puniqueid->value.intval > 0x7fffffff)

           return_error(gs_error_rangecheck);

        /* Apparently fonts created by Fontographer often have */

        /* a UniqueID of 0, contrary to Adobe's specifications. */

        /* Treat 0 as equivalent to -1 (no UniqueID). */

        if (puniqueid->value.intval == 0) {

            uid_set_invalid(puid);

            return defaultval;

        } else

            uid_set_UniqueID(puid, puniqueid->value.intval);

    }

    return 0;

}

/* Check that a UID in a dictionary is equal to an existing, valid UID. */

bool

dict_check_uid_param(const ref * pdict, const gs_uid * puid)

{

    ref *puniqueid;

    if (uid_is_XUID(puid)) {

        uint size = uid_XUID_size(puid);

        uint i;

        if (dict_find_string(pdict, "XUID", &puniqueid) <= 0)

            return false;

        if (!r_has_type(puniqueid, t_array) ||

            r_size(puniqueid) != size

            )

            return false;

        for (i = 0; i < size; i++) {

            const ref *pvalue = puniqueid->value.const_refs + i;

            if (!r_has_type(pvalue, t_integer))

                return false;

            if (pvalue->value.intval != uid_XUID_values(puid)[i])

                return false;

        }

        return true;

    } else {

        if (dict_find_string(pdict, "UniqueID", &puniqueid) <= 0)

            return false;

        return (r_has_type(puniqueid, t_integer) &&

                puniqueid->value.intval == puid->id);

    }

}

/* Create and store [/key any] array in $error.errorinfo.

 * The key must be a permanently allocated C string.

 * This routine is here because it is often used with parameter dictionaries.

 */

int

gs_errorinfo_put_pair(i_ctx_t *i_ctx_p, const char *key, int len, const ref *any)

{

    int code;

    ref pair, *aptr, key_name, *pderror;

    code = name_ref(imemory_local, (const byte *)key, len, &key_name, 0);

    if (code < 0)

        return code;

    code = gs_alloc_ref_array(iimemory_local, &pair, a_readonly, 2, "gs_errorinfo_put_pair");

    if (code < 0)

        return code;

    aptr = pair.value.refs;

    ref_assign_new(aptr, &key_name);

    ref_assign_new(aptr+1, any);

    if (dict_find_string(systemdict, "$error", &pderror) <= 0 ||

        !r_has_type(pderror, t_dictionary) ||

        idict_put_string(pderror, "errorinfo", &pair) < 0

        )

        return_error(gs_error_Fatal);

    return 0;

}

/* Take a key's value from a given dictionary, create [/key any] array,

 * and store it in $error.errorinfo.

 * The key must be a permanently allocated C string.

 */

void

gs_errorinfo_put_pair_from_dict(i_ctx_t *i_ctx_p, const ref *op, const char *key)

{   ref *val, n;

    if (dict_find_string(op, key, &val) <= 0) {

        make_null(&n);

        val = &n;

    }

    gs_errorinfo_put_pair(i_ctx_p, key, strlen(key), val);

}