+
+ for (i = 0; i < decls->count; ++i) {
+ if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
+ ret->decl = decls->list[i]->func;
+ return decls->list[i];
+ }
+ }
+ return NULL;
+}
+static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
+ return_stmt *ret;
+
+ /* we must have exactly one ret stmt delcaring the native func to call */
+ /* and which type cast to apply */
+ if (impl->stmts->ret.count != 1) {
+ if (impl->stmts->ret.count > 1) {
+ data->error(PSI_WARNING, "Too many `return` statements for implmentation %s;"
+ " found %zu, exactly one is needed",
+ impl->func->name, impl->stmts->ret.count);
+ } else {
+ data->error(PSI_WARNING, "Missing `return` statement for implementation %s",
+ impl->func->name);
+ }
+ return 0;
+ }
+
+ ret = impl->stmts->ret.list[0];
+
+ if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
+ data->error(PSI_WARNING, "Missing declaration for implementation %s",
+ impl->func->name);
+ return 0;
+ }
+ if (!validate_set_value(data, ret->set, ret->decl)) {
+ return 0;
+ }
+
+ return 1;
+}
+static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {
+ size_t i, j;
+ /* we can have multiple let stmts */
+ /* check that we have a let stmt for every decl arg */
+ if (impl->decl->args) for (i = 0; i < impl->decl->args->count; ++i) {
+ decl_arg *darg = impl->decl->args->args[i];
+ int check = 0;
+
+ for (j = 0; j < impl->stmts->let.count; ++j) {
+ let_stmt *let = impl->stmts->let.list[j];
+
+ if (!strcmp(let->var->name, darg->var->name)) {
+ darg->let = let;
+ check = 1;
+ break;
+ }
+ }
+ if (!check) {
+ data->error(PSI_WARNING, "Missing `let` statement for arg '%s %.*s%s'"
+ " of declaration '%s' for implementation '%s'",
+ darg->type->name, (int) darg->var->pointer_level, "*****",
+ darg->var->name, impl->decl->func->var->name, impl->func->name);
+ return 0;
+ }
+ }
+ /* check that the let_value references a known variable or NULL */
+ for (i = 0; i < impl->stmts->let.count; ++i) {
+ let_stmt *let = impl->stmts->let.list[i];
+ int check = 0;
+
+ if (let->val && let->val->func && let->val->func->alloc) {
+ if (!validate_decl_type(data, let->val->func->alloc->type)) {
+ data->error(PSI_WARNING, "Cannot use '%s' as type for calloc in `let` statement",
+ let->val->func->alloc->type->name);
+ return 0;
+ }
+ }
+ if (let->val && let->val->var) {
+ if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
+ impl_arg *iarg = impl->func->args->args[j];
+
+ if (!strcmp(let->val->var->name, iarg->var->name)) {
+ let->arg = iarg;
+ check = 1;
+ break;
+ }
+ }
+ if (!check) {
+ data->error(PSI_WARNING, "Unknown value '$%s' of `let` statement"
+ " for variable '%s' of implementation '%s'",
+ let->val->var->name, let->var->name, impl->func->name);
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+static inline int validate_impl_set_stmts(PSI_Data *data, impl *impl) {
+ size_t i, j, k;
+ /* we can have any count of set stmts; processing out vars */
+ /* check that set stmts reference known variables */
+ for (i = 0; i < impl->stmts->set.count; ++i) {
+ set_stmt *set = impl->stmts->set.list[i];
+ int check = 0;
+
+ if (impl->func->args) for (j = 0; j < impl->func->args->count; ++j) {
+ impl_arg *iarg = impl->func->args->args[j];
+
+ if (!strcmp(set->var->name, iarg->var->name)) {
+ set->arg = iarg;
+ check = 1;
+ break;
+ }
+ }
+ if (!check) {
+ data->error(PSI_WARNING, "Unknown variable '$%s' of `set` statement"
+ " of implementation '%s'",
+ set->var->name, impl->func->name);
+ return 0;
+ }
+
+ for (j = 0; j < set->val->vars->count; ++j) {
+ decl_var *set_var = set->val->vars->vars[j];
+
+ check = 0;
+ if (impl->decl->args) for (k = 0; k < impl->decl->args->count; ++k) {
+ decl_arg *set_arg = impl->decl->args->args[k];
+
+ if (!strcmp(set_var->name, set_arg->var->name)) {
+ check = 1;
+ if (!validate_set_value(data, set->val, set_arg)) {
+ return 0;
+ }
+ set_var->arg = set_arg;
+ break;
+ }
+ }
+
+ if (!check) {
+ data->error(PSI_WARNING, "Unknown value '%s' of `set` statement"
+ " for variable '$%s' of implementation '%s'",
+ set_var->name, set->arg->var->name, impl->func->name);
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+static inline int validate_impl_free_stmts(PSI_Data *data, impl *impl) {
+ size_t i, j, k;
+ /* we can have any count of free stmts; freeing any out vars */
+ for (i = 0; i < impl->stmts->fre.count; ++i) {
+ free_stmt *fre = impl->stmts->fre.list[i];
+
+ for (j = 0; j < fre->vars->count; ++j) {
+ decl_var *free_var = fre->vars->vars[j];
+ int check = 0;
+
+ if (!strcmp(free_var->name, impl->decl->func->var->name)) {
+ continue;
+ }
+ if (impl->decl->args) for (k = 0; k < impl->decl->args->count; ++k) {
+ decl_arg *free_arg = impl->decl->args->args[k];
+
+ if (!strcmp(free_var->name, free_arg->var->name)) {
+ check = 1;
+ free_var->arg = free_arg;
+ break;
+ }
+ }
+
+ if (!check) {
+ data->error(PSI_WARNING, "Unknown variable '%s' of `free` statement"
+ " of implementation '%s'",
+ free_var->name, impl->func->name);
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+static inline int validate_impl_stmts(PSI_Data *data, impl *impl) {
+ if (!impl->stmts) {
+ data->error(PSI_WARNING, "Missing body for implementation %s!",
+ impl->func->name);
+ return 0;
+ }
+
+ if (!validate_impl_ret_stmt(data, impl)) {
+ return 0;
+ }
+
+ if (!validate_impl_let_stmts(data, impl)) {
+ return 0;
+ }
+ if (!validate_impl_set_stmts(data, impl)) {
+ return 0;
+ }
+ if (!validate_impl_free_stmts(data, impl)) {
+ return 0;
+ }
+
+ return 1;
+}
+
+PSI_Context *PSI_ContextInit(PSI_Context *C, PSI_ContextOps *ops, PSI_ContextErrorFunc error)
+{
+ size_t i, j;
+ PSI_Data T;