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- /* Copyright (C) 1995, 1998, 1999 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author or
- distributor accepts any responsibility for the consequences of using it, or
- for whether it serves any particular purpose or works at all, unless he or
- she says so in writing. Refer to the Aladdin Free Public License (the
- "License") for full details.
-
- Every copy of AFPL Ghostscript must include a copy of the License, normally
- in a plain ASCII text file named PUBLIC. The License grants you the right
- to copy, modify and redistribute AFPL Ghostscript, but only under certain
- conditions described in the License. Among other things, the License
- requires that the copyright notice and this notice be preserved on all
- copies.
- */
- /*$Id: gsparam.c,v 1.4 2000/09/19 19:00:30 lpd Exp $ */
- /* Support for parameter lists */
- #include "memory_.h"
- #include "string_.h"
- #include "gx.h"
- #include "gserrors.h"
- #include "gsparam.h"
- #include "gsstruct.h"
- /* GC procedures */
- ENUM_PTRS_WITH(gs_param_typed_value_enum_ptrs, gs_param_typed_value *pvalue) return 0;
- case 0:
- switch (pvalue->type) {
- case gs_param_type_string:
- return ENUM_STRING(&pvalue->value.s);
- case gs_param_type_name:
- return ENUM_STRING(&pvalue->value.n);
- case gs_param_type_int_array:
- return ENUM_OBJ(pvalue->value.ia.data);
- case gs_param_type_float_array:
- return ENUM_OBJ(pvalue->value.fa.data);
- case gs_param_type_string_array:
- return ENUM_OBJ(pvalue->value.sa.data);
- case gs_param_type_name_array:
- return ENUM_OBJ(pvalue->value.na.data);
- default:
- return ENUM_OBJ(0); /* don't stop early */
- }
- ENUM_PTRS_END
- RELOC_PTRS_WITH(gs_param_typed_value_reloc_ptrs, gs_param_typed_value *pvalue) {
- switch (pvalue->type) {
- case gs_param_type_string:
- case gs_param_type_name: {
- gs_const_string str;
- str.data = pvalue->value.s.data; /* n == s */
- str.size = pvalue->value.s.size;
- RELOC_CONST_STRING_VAR(str);
- pvalue->value.s.data = str.data;
- break;
- }
- case gs_param_type_int_array:
- RELOC_VAR(pvalue->value.ia.data);
- break;
- case gs_param_type_float_array:
- RELOC_VAR(pvalue->value.fa.data);
- break;
- case gs_param_type_string_array:
- RELOC_VAR(pvalue->value.sa.data);
- break;
- case gs_param_type_name_array:
- RELOC_VAR(pvalue->value.na.data);
- break;
- default:
- break;
- }
- }
- RELOC_PTRS_END
- /* Internal procedure to initialize the common part of a parameter list. */
- void
- gs_param_list_init(gs_param_list *plist, const gs_param_list_procs *procs,
- gs_memory_t *mem)
- {
- plist->procs = procs;
- plist->memory = mem;
- plist->persistent_keys = true;
- }
- /* Set whether the keys for param_write_XXX are persistent. */
- void
- gs_param_list_set_persistent_keys(gs_param_list *plist, bool persistent)
- {
- plist->persistent_keys = persistent;
- }
- /* Reset a gs_param_key_t enumerator to its initial state */
- void
- param_init_enumerator(gs_param_enumerator_t * enumerator)
- {
- memset(enumerator, 0, sizeof(*enumerator));
- }
- /* Transfer a collection of parameters. */
- private const byte xfer_item_sizes[] = {
- GS_PARAM_TYPE_SIZES(0)
- };
- int
- gs_param_read_items(gs_param_list * plist, void *obj,
- const gs_param_item_t * items)
- {
- const gs_param_item_t *pi;
- int ecode = 0;
- for (pi = items; pi->key != 0; ++pi) {
- const char *key = pi->key;
- void *pvalue = (void *)((char *)obj + pi->offset);
- gs_param_typed_value typed;
- int code;
- typed.type = pi->type;
- code = param_read_requested_typed(plist, key, &typed);
- switch (code) {
- default: /* < 0 */
- ecode = code;
- case 1:
- break;
- case 0:
- if (typed.type != pi->type) /* shouldn't happen! */
- ecode = gs_note_error(gs_error_typecheck);
- else
- memcpy(pvalue, &typed.value, xfer_item_sizes[pi->type]);
- }
- }
- return ecode;
- }
- int
- gs_param_write_items(gs_param_list * plist, const void *obj,
- const void *default_obj, const gs_param_item_t * items)
- {
- const gs_param_item_t *pi;
- int ecode = 0;
- for (pi = items; pi->key != 0; ++pi) {
- const char *key = pi->key;
- const void *pvalue = (const void *)((const char *)obj + pi->offset);
- int size = xfer_item_sizes[pi->type];
- gs_param_typed_value typed;
- int code;
- if (default_obj != 0 &&
- !memcmp((const void *)((const char *)default_obj + pi->offset),
- pvalue, size)
- )
- continue;
- memcpy(&typed.value, pvalue, size);
- typed.type = pi->type;
- code = (*plist->procs->xmit_typed) (plist, key, &typed);
- if (code < 0)
- ecode = code;
- }
- return ecode;
- }
- /* Read a value, with coercion if requested, needed, and possible. */
- /* If mem != 0, we can coerce int arrays to float arrays. */
- int
- param_coerce_typed(gs_param_typed_value * pvalue, gs_param_type req_type,
- gs_memory_t * mem)
- {
- if (req_type == gs_param_type_any || pvalue->type == req_type)
- return 0;
- /*
- * Look for coercion opportunities. It would be wonderful if we
- * could convert int/float arrays and name/string arrays, but
- * right now we can't. However, a 0-length heterogenous array
- * will satisfy a request for any specific type.
- */
- switch (pvalue->type /* actual type */ ) {
- case gs_param_type_int:
- switch (req_type) {
- case gs_param_type_long:
- pvalue->value.l = pvalue->value.i;
- goto ok;
- case gs_param_type_float:
- pvalue->value.f = (float)pvalue->value.l;
- goto ok;
- default:
- break;
- }
- break;
- case gs_param_type_long:
- switch (req_type) {
- case gs_param_type_int:
- #if arch_sizeof_int < arch_sizeof_long
- if (pvalue->value.l != (int)pvalue->value.l)
- return_error(gs_error_rangecheck);
- #endif
- pvalue->value.i = (int)pvalue->value.l;
- goto ok;
- case gs_param_type_float:
- pvalue->value.f = (float)pvalue->value.l;
- goto ok;
- default:
- break;
- }
- break;
- case gs_param_type_string:
- if (req_type == gs_param_type_name)
- goto ok;
- break;
- case gs_param_type_name:
- if (req_type == gs_param_type_string)
- goto ok;
- break;
- case gs_param_type_int_array:
- switch (req_type) {
- case gs_param_type_float_array:{
- uint size = pvalue->value.ia.size;
- float *fv;
- uint i;
- if (mem == 0)
- break;
- fv = (float *)gs_alloc_byte_array(mem, size, sizeof(float),
- "int array => float array");
- if (fv == 0)
- return_error(gs_error_VMerror);
- for (i = 0; i < size; ++i)
- fv[i] = pvalue->value.ia.data[i];
- pvalue->value.fa.data = fv;
- pvalue->value.fa.persistent = false;
- goto ok;
- }
- default:
- break;
- }
- break;
- case gs_param_type_string_array:
- if (req_type == gs_param_type_name_array)
- goto ok;
- break;
- case gs_param_type_name_array:
- if (req_type == gs_param_type_string_array)
- goto ok;
- break;
- case gs_param_type_array:
- if (pvalue->value.d.size == 0 &&
- (req_type == gs_param_type_int_array ||
- req_type == gs_param_type_float_array ||
- req_type == gs_param_type_string_array ||
- req_type == gs_param_type_name_array)
- )
- goto ok;
- break;
- default:
- break;
- }
- return_error(gs_error_typecheck);
- ok:pvalue->type = req_type;
- return 0;
- }
- int
- param_read_requested_typed(gs_param_list * plist, gs_param_name pkey,
- gs_param_typed_value * pvalue)
- {
- gs_param_type req_type = pvalue->type;
- int code = (*plist->procs->xmit_typed) (plist, pkey, pvalue);
- if (code != 0)
- return code;
- return param_coerce_typed(pvalue, req_type, plist->memory);
- }
- /* ---------------- Fixed-type reading procedures ---------------- */
- #define RETURN_READ_TYPED(alt, ptype)\
- gs_param_typed_value typed;\
- int code;\
- \
- typed.type = ptype;\
- code = param_read_requested_typed(plist, pkey, &typed);\
- if ( code == 0 )\
- *pvalue = typed.value.alt;\
- return code
- int
- param_read_null(gs_param_list * plist, gs_param_name pkey)
- {
- gs_param_typed_value typed;
- typed.type = gs_param_type_null;
- return param_read_requested_typed(plist, pkey, &typed);
- }
- int
- param_read_bool(gs_param_list * plist, gs_param_name pkey, bool * pvalue)
- {
- RETURN_READ_TYPED(b, gs_param_type_bool);
- }
- int
- param_read_int(gs_param_list * plist, gs_param_name pkey, int *pvalue)
- {
- RETURN_READ_TYPED(i, gs_param_type_int);
- }
- int
- param_read_long(gs_param_list * plist, gs_param_name pkey, long *pvalue)
- {
- RETURN_READ_TYPED(l, gs_param_type_long);
- }
- int
- param_read_float(gs_param_list * plist, gs_param_name pkey, float *pvalue)
- {
- RETURN_READ_TYPED(f, gs_param_type_float);
- }
- int
- param_read_string(gs_param_list * plist, gs_param_name pkey,
- gs_param_string * pvalue)
- {
- RETURN_READ_TYPED(s, gs_param_type_string);
- }
- int
- param_read_name(gs_param_list * plist, gs_param_name pkey,
- gs_param_string * pvalue)
- {
- RETURN_READ_TYPED(n, gs_param_type_string);
- }
- int
- param_read_int_array(gs_param_list * plist, gs_param_name pkey,
- gs_param_int_array * pvalue)
- {
- RETURN_READ_TYPED(ia, gs_param_type_int_array);
- }
- int
- param_read_float_array(gs_param_list * plist, gs_param_name pkey,
- gs_param_float_array * pvalue)
- {
- RETURN_READ_TYPED(fa, gs_param_type_float_array);
- }
- int
- param_read_string_array(gs_param_list * plist, gs_param_name pkey,
- gs_param_string_array * pvalue)
- {
- RETURN_READ_TYPED(sa, gs_param_type_string_array);
- }
- int
- param_read_name_array(gs_param_list * plist, gs_param_name pkey,
- gs_param_string_array * pvalue)
- {
- RETURN_READ_TYPED(na, gs_param_type_name_array);
- }
- #undef RETURN_READ_TYPED
- /* ---------------- Default writing procedures ---------------- */
- #define RETURN_WRITE_TYPED(alt, ptype)\
- gs_param_typed_value typed;\
- \
- typed.value.alt = *pvalue;\
- typed.type = ptype;\
- return param_write_typed(plist, pkey, &typed)
- int
- param_write_null(gs_param_list * plist, gs_param_name pkey)
- {
- gs_param_typed_value typed;
- typed.type = gs_param_type_null;
- return param_write_typed(plist, pkey, &typed);
- }
- int
- param_write_bool(gs_param_list * plist, gs_param_name pkey, const bool * pvalue)
- {
- RETURN_WRITE_TYPED(b, gs_param_type_bool);
- }
- int
- param_write_int(gs_param_list * plist, gs_param_name pkey, const int *pvalue)
- {
- RETURN_WRITE_TYPED(i, gs_param_type_int);
- }
- int
- param_write_long(gs_param_list * plist, gs_param_name pkey, const long *pvalue)
- {
- RETURN_WRITE_TYPED(l, gs_param_type_long);
- }
- int
- param_write_float(gs_param_list * plist, gs_param_name pkey,
- const float *pvalue)
- {
- RETURN_WRITE_TYPED(f, gs_param_type_float);
- }
- int
- param_write_string(gs_param_list * plist, gs_param_name pkey,
- const gs_param_string * pvalue)
- {
- RETURN_WRITE_TYPED(s, gs_param_type_string);
- }
- int
- param_write_name(gs_param_list * plist, gs_param_name pkey,
- const gs_param_string * pvalue)
- {
- RETURN_WRITE_TYPED(n, gs_param_type_name);
- }
- int
- param_write_int_array(gs_param_list * plist, gs_param_name pkey,
- const gs_param_int_array * pvalue)
- {
- RETURN_WRITE_TYPED(ia, gs_param_type_int_array);
- }
- int
- param_write_int_values(gs_param_list * plist, gs_param_name pkey,
- const int *values, uint size, bool persistent)
- {
- gs_param_int_array ia;
- ia.data = values, ia.size = size, ia.persistent = persistent;
- return param_write_int_array(plist, pkey, &ia);
- }
- int
- param_write_float_array(gs_param_list * plist, gs_param_name pkey,
- const gs_param_float_array * pvalue)
- {
- RETURN_WRITE_TYPED(fa, gs_param_type_float_array);
- }
- int
- param_write_float_values(gs_param_list * plist, gs_param_name pkey,
- const float *values, uint size, bool persistent)
- {
- gs_param_float_array fa;
- fa.data = values, fa.size = size, fa.persistent = persistent;
- return param_write_float_array(plist, pkey, &fa);
- }
- int
- param_write_string_array(gs_param_list * plist, gs_param_name pkey,
- const gs_param_string_array * pvalue)
- {
- RETURN_WRITE_TYPED(sa, gs_param_type_string_array);
- }
- int
- param_write_name_array(gs_param_list * plist, gs_param_name pkey,
- const gs_param_string_array * pvalue)
- {
- RETURN_WRITE_TYPED(na, gs_param_type_name_array);
- }
- #undef RETURN_WRITE_TYPED
- /* ---------------- Default request implementation ---------------- */
- int
- gs_param_request_default(gs_param_list * plist, gs_param_name pkey)
- {
- return 0;
- }
- int
- gs_param_requested_default(const gs_param_list * plist, gs_param_name pkey)
- {
- return -1; /* requested by default */
- }
|