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Diffstat (limited to 'src/mesa/slang/slang_compile_function.c')
-rw-r--r--src/mesa/slang/slang_compile_function.c262
1 files changed, 262 insertions, 0 deletions
diff --git a/src/mesa/slang/slang_compile_function.c b/src/mesa/slang/slang_compile_function.c
new file mode 100644
index 0000000000..4dd885176d
--- /dev/null
+++ b/src/mesa/slang/slang_compile_function.c
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+/*
+ * Mesa 3-D graphics library
+ * Version: 6.5
+ *
+ * Copyright (C) 2005-2006 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file slang_compile_function.c
+ * slang front-end compiler
+ * \author Michal Krol
+ */
+
+#include "main/imports.h"
+#include "slang_compile.h"
+#include "slang_mem.h"
+
+
+int
+slang_function_construct(slang_function * func)
+{
+ func->kind = SLANG_FUNC_ORDINARY;
+ if (!slang_variable_construct(&func->header))
+ return 0;
+
+ func->parameters = (slang_variable_scope *)
+ _slang_alloc(sizeof(slang_variable_scope));
+ if (func->parameters == NULL) {
+ slang_variable_destruct(&func->header);
+ return 0;
+ }
+
+ _slang_variable_scope_ctr(func->parameters);
+ func->param_count = 0;
+ func->body = NULL;
+ return 1;
+}
+
+void
+slang_function_destruct(slang_function * func)
+{
+ slang_variable_destruct(&func->header);
+ slang_variable_scope_destruct(func->parameters);
+ _slang_free(func->parameters);
+ if (func->body != NULL) {
+ slang_operation_destruct(func->body);
+ _slang_free(func->body);
+ }
+}
+
+
+slang_function *
+slang_function_new(slang_function_kind kind)
+{
+ slang_function *fun = (slang_function *)
+ _slang_alloc(sizeof(slang_function));
+ if (fun) {
+ slang_function_construct(fun);
+ fun->kind = kind;
+ }
+ return fun;
+}
+
+
+/*
+ * slang_function_scope
+ */
+
+GLvoid
+_slang_function_scope_ctr(slang_function_scope * self)
+{
+ self->functions = NULL;
+ self->num_functions = 0;
+ self->outer_scope = NULL;
+}
+
+void
+slang_function_scope_destruct(slang_function_scope * scope)
+{
+ unsigned int i;
+
+ for (i = 0; i < scope->num_functions; i++)
+ slang_function_destruct(scope->functions + i);
+ _slang_free(scope->functions);
+}
+
+
+/**
+ * Does this function have a non-void return value?
+ */
+GLboolean
+_slang_function_has_return_value(const slang_function *fun)
+{
+ return fun->header.type.specifier.type != SLANG_SPEC_VOID;
+}
+
+
+/**
+ * Search a list of functions for a particular function by name.
+ * \param funcs the list of functions to search
+ * \param a_name the name to search for
+ * \param all_scopes if non-zero, search containing scopes too.
+ * \return pointer to found function, or NULL.
+ */
+int
+slang_function_scope_find_by_name(slang_function_scope * funcs,
+ slang_atom a_name, int all_scopes)
+{
+ unsigned int i;
+
+ for (i = 0; i < funcs->num_functions; i++)
+ if (a_name == funcs->functions[i].header.a_name)
+ return 1;
+ if (all_scopes && funcs->outer_scope != NULL)
+ return slang_function_scope_find_by_name(funcs->outer_scope, a_name, 1);
+ return 0;
+}
+
+
+/**
+ * Search a list of functions for a particular function (for implementing
+ * function calls. Matching is done by first comparing the function's name,
+ * then the function's parameter list.
+ *
+ * \param funcs the list of functions to search
+ * \param fun the function to search for
+ * \param all_scopes if non-zero, search containing scopes too.
+ * \return pointer to found function, or NULL.
+ */
+slang_function *
+slang_function_scope_find(slang_function_scope * funcs, slang_function * fun,
+ int all_scopes)
+{
+ unsigned int i;
+
+ for (i = 0; i < funcs->num_functions; i++) {
+ slang_function *f = &funcs->functions[i];
+ const GLuint haveRetValue = 0;
+#if 0
+ = (f->header.type.specifier.type != SLANG_SPEC_VOID);
+#endif
+ unsigned int j;
+
+ /*
+ printf("Compare name %s to %s (ret %u, %d, %d)\n",
+ (char *) fun->header.a_name, (char *) f->header.a_name,
+ haveRetValue,
+ fun->param_count, f->param_count);
+ */
+
+ if (fun->header.a_name != f->header.a_name)
+ continue;
+ if (fun->param_count != f->param_count)
+ continue;
+ for (j = haveRetValue; j < fun->param_count; j++) {
+ if (!slang_type_specifier_equal
+ (&fun->parameters->variables[j]->type.specifier,
+ &f->parameters->variables[j]->type.specifier))
+ break;
+ }
+ if (j == fun->param_count) {
+ /*
+ printf("Found match\n");
+ */
+ return f;
+ }
+ }
+ /*
+ printf("Not found\n");
+ */
+ if (all_scopes && funcs->outer_scope != NULL)
+ return slang_function_scope_find(funcs->outer_scope, fun, 1);
+ return NULL;
+}
+
+
+/**
+ * Lookup a function according to name and parameter count/types.
+ */
+slang_function *
+_slang_function_locate(const slang_function_scope * funcs, slang_atom a_name,
+ slang_operation * args, GLuint num_args,
+ const slang_name_space * space, slang_atom_pool * atoms,
+ slang_info_log *log, GLboolean *error)
+{
+ slang_typeinfo arg_ti[100];
+ GLuint i;
+
+ *error = GL_FALSE;
+
+ /* determine type of each argument */
+ assert(num_args < 100);
+ for (i = 0; i < num_args; i++) {
+ if (!slang_typeinfo_construct(&arg_ti[i]))
+ return NULL;
+ if (!_slang_typeof_operation(&args[i], space, &arg_ti[i], atoms, log)) {
+ return NULL;
+ }
+ }
+
+ /* loop over function scopes */
+ while (funcs) {
+
+ /* look for function with matching name and argument/param types */
+ for (i = 0; i < funcs->num_functions; i++) {
+ slang_function *f = &funcs->functions[i];
+ const GLuint haveRetValue = _slang_function_has_return_value(f);
+ GLuint j;
+
+ if (a_name != f->header.a_name)
+ continue;
+ if (f->param_count - haveRetValue != num_args)
+ continue;
+
+ /* compare parameter / argument types */
+ for (j = 0; j < num_args; j++) {
+ if (!slang_type_specifier_compatible(&arg_ti[j].spec,
+ &f->parameters->variables[j]->type.specifier)) {
+ /* param/arg types don't match */
+ break;
+ }
+
+ /* "out" and "inout" formal parameter requires the actual
+ * argument to be an l-value.
+ */
+ if (!arg_ti[j].can_be_referenced &&
+ (f->parameters->variables[j]->type.qualifier == SLANG_QUAL_OUT ||
+ f->parameters->variables[j]->type.qualifier == SLANG_QUAL_INOUT)) {
+ /* param is not an lvalue! */
+ *error = GL_TRUE;
+ return NULL;
+ }
+ }
+
+ if (j == num_args) {
+ /* name and args match! */
+ return f;
+ }
+ }
+
+ funcs = funcs->outer_scope;
+ }
+
+ return NULL;
+}
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