types refactoring
[m6w6/ext-psi] / src / context_validate.c
diff --git a/src/context_validate.c b/src/context_validate.c
deleted file mode 100644 (file)
index 3e99e1b..0000000
+++ /dev/null
@@ -1,1672 +0,0 @@
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include "php.h"
-
-#include <sys/param.h>
-#include <dlfcn.h>
-
-#include "php_psi.h"
-#include "php_psi_stdinc.h"
-#include "php_psi_stdtypes.h"
-#include "php_psi_macros.h"
-#include "php_psi_redirs.h"
-
-#include "parser.h"
-#include "calc.h"
-#include "marshal.h"
-#include "engine.h"
-#include "context.h"
-
-static int validate_lib(struct psi_data *data, void **dlopened) {
-       char lib[MAXPATHLEN];
-       const char *ptr = data->psi.file.ln;
-       size_t len;
-
-       if (!ptr) {
-               /* FIXME: assume stdlib */
-               return 1;
-       } else if (!strchr(ptr, '/')) {
-               len = snprintf(lib, MAXPATHLEN, "lib%s.%s", ptr, PHP_PSI_SHLIB_SUFFIX);
-               if (MAXPATHLEN == len) {
-                       data->error(data, NULL, PSI_WARNING, "Library name too long: '%s'", ptr);
-               }
-               lib[len] = 0;
-               ptr = lib;
-       }
-       if (!(*dlopened = dlopen(ptr, RTLD_LAZY|RTLD_LOCAL))) {
-               data->error(data, NULL, PSI_WARNING, "Could not open library '%s': %s.",
-                               data->psi.file.ln, dlerror());
-               return 0;
-       }
-       return 1;
-}
-
-static inline int locate_decl_type_alias(decl_typedefs *defs, decl_type *type) {
-       size_t i;
-       struct psi_std_type *stdtyp;
-
-       if (type->real.def) {
-               return 1;
-       }
-       if (defs) for (i = 0; i < defs->count; ++i) {
-               decl_arg *def = defs->list[i];
-
-               if (def->type->type != type->type && !strcmp(def->var->name, type->name)) {
-                       type->real.def = def;
-                       return 1;
-               }
-       }
-       for (stdtyp = &psi_std_types[0]; stdtyp->type_tag; ++stdtyp) {
-               if (!strcmp(type->name, stdtyp->alias ?: stdtyp->type_name)) {
-                       type->type = stdtyp->type_tag;
-                       return 1;
-               }
-       }
-
-       return 0;
-}
-
-static inline int locate_decl_type_struct(decl_structs *structs, decl_type *type) {
-       size_t i;
-
-       if (type->real.strct) {
-               return 1;
-       }
-       if (structs) for (i = 0; i < structs->count; ++i) {
-               if (!strcmp(structs->list[i]->name, type->name)) {
-                       type->real.strct = structs->list[i];
-                       return 1;
-               }
-       }
-       return 0;
-}
-
-static inline int locate_decl_type_union(decl_unions *unions, decl_type *type) {
-       size_t i;
-
-       if (type->real.unn) {
-               return 1;
-       }
-       if (unions) for (i = 0; i < unions->count; ++i) {
-               if (!strcmp(unions->list[i]->name, type->name)) {
-                       type->real.unn = unions->list[i];
-                       return 1;
-               }
-       }
-       return 0;
-}
-
-static inline int locate_decl_type_enum(decl_enums *enums, decl_type *type) {
-       size_t i;
-
-       if (type->real.enm) {
-               return 1;
-       }
-       if (enums) for (i = 0; i < enums->count; ++i) {
-               if (!strcmp(enums->list[i]->name, type->name)) {
-                       type->real.enm = enums->list[i];
-                       return 1;
-               }
-       }
-       return 0;
-}
-
-static inline int locate_decl_type_decl(decls *decls, decl_type *type) {
-       size_t i;
-
-       if (type->real.func) {
-               return 1;
-       }
-       if (decls) for (i = 0; i < decls->count; ++i) {
-               if (!strcmp(decls->list[i]->func->var->name, type->name)) {
-                       type->real.func = decls->list[i];
-                       return 1;
-               }
-       }
-
-       return 0;
-}
-
-static inline int validate_decl_nodl(struct psi_data *data, decl *decl);
-static inline int validate_decl_struct(struct psi_data *data, decl_struct *s);
-static inline int validate_decl_union(struct psi_data *data, decl_union *u);
-static inline int validate_decl_enum(struct psi_data *data, decl_enum *e);
-
-static inline int validate_decl_type(struct psi_data *data, decl_type *type, decl_arg *def) {
-       if (weak_decl_type(type)) {
-               if (!locate_decl_type_alias(data->defs, type)) {
-                       return 0;
-               }
-               if (type->real.def) {
-                       return validate_decl_type(data, type->real.def->type, type->real.def);
-               }
-               return 1;
-       }
-
-       switch (type->type) {
-       case PSI_T_STRUCT:
-               if (!locate_decl_type_struct(data->structs, type)) {
-                       return 0;
-               }
-               break;
-       case PSI_T_UNION:
-               if (!locate_decl_type_union(data->unions, type)) {
-                       return 0;
-               }
-               break;
-       case PSI_T_ENUM:
-               if (!locate_decl_type_enum(data->enums, type)) {
-                       return 0;
-               }
-               break;
-       case PSI_T_FUNCTION:
-               if (!locate_decl_type_decl(data->decls, type)) {
-                       return 0;
-               }
-               if (!validate_decl_nodl(data, type->real.func)) {
-                       return 0;
-               }
-               break;
-       }
-       return 1;
-}
-static inline int validate_decl_typedef(struct psi_data *data, decl_arg *def) {
-       if (!validate_decl_type(data, def->type, def)) {
-               const char *pre;
-
-               switch (def->type->type) {
-               case PSI_T_STRUCT:      pre = "struct ";        break;
-               case PSI_T_UNION:       pre = "union ";         break;
-               case PSI_T_ENUM:        pre = "enum ";          break;
-               default:                        pre = "";                       break;
-               }
-               data->error(data, def->token, PSI_WARNING,
-                       "Type '%s' cannot be aliased to %s'%s'",
-                       def->var->name, pre, def->type->name);
-               return 0;
-       }
-       if (def->type->type == PSI_T_VOID) {
-               if (def->var->pointer_level) {
-                       def->type->type = PSI_T_POINTER;
-               } else {
-                       data->error(data, def->token, PSI_WARNING,
-                               "Type '%s' cannot be aliased to 'void'",
-                               def->type->name);
-                       return 0;
-               }
-       }
-       return 1;
-}
-
-static inline int validate_constant(struct psi_data *data, constant *c) {
-       /* FIXME */
-       return 1;
-}
-
-static inline int validate_decl_arg(struct psi_data *data, decl_arg *arg) {
-       if (!validate_decl_type(data, arg->type, NULL)) {
-               data->error(data, arg->type->token, PSI_WARNING,
-                       "Cannot use '%s' as type for '%s'",
-                       arg->type->name, arg->var->name);
-               return 0;
-       }
-       return 1;
-}
-
-static int psi_sort_struct_arg_cmp(const void *_a, const void *_b) {
-       decl_arg *a = *(decl_arg **)_a, *b = *(decl_arg **)_b;
-
-       if (a->layout->pos == b->layout->pos) {
-               if (a->layout->len == b->layout->len) {
-                       return 0;
-               } else if (a->layout->len > b->layout->len) {
-                       return -1;
-               } else {
-                       return 1;
-               }
-       } else if (a->layout->pos > b->layout->pos) {
-               return 1;
-       } else {
-               return -1;
-       }
-}
-static void psi_sort_struct_arg_swp(void *a, void *b) {
-       decl_arg **_a = a, **_b = b, *_c;
-
-       _c = *_b;
-       *_b = *_a;
-       *_a = _c;
-}
-static inline void psi_sort_struct_args(void **args, size_t count) {
-       zend_insert_sort(args, count, sizeof(*args),
-                       psi_sort_struct_arg_cmp, psi_sort_struct_arg_swp);
-}
-
-static inline int validate_decl_struct_darg(struct psi_data *data, decl_arg *darg, void *current) {
-       decl_type *real = real_decl_type(darg->type);
-
-       /* pre-validate any structs/unions/enums */
-       switch (real->type) {
-       case PSI_T_STRUCT:
-               if (current && current == real->real.strct) {
-                       return 1;
-               }
-               if (!locate_decl_type_struct(data->structs, real)) {
-                       return 0;
-               }
-               if (!validate_decl_struct(data, real->real.strct)) {
-                       return 0;
-               }
-               break;
-       case PSI_T_UNION:
-               if (current && current == real->real.unn) {
-                       return 1;
-               }
-               if (!locate_decl_type_union(data->unions, real)) {
-                       return 0;
-               }
-               if (!validate_decl_union(data, real->real.unn)) {
-                       return 0;
-               }
-               break;
-       case PSI_T_ENUM:
-               if (current && current == real->real.enm) {
-                       return 1;
-               }
-               if (!locate_decl_type_enum(data->enums, real)) {
-                       return 0;
-               }
-               if (!validate_decl_enum(data, real->real.enm)) {
-                       return 0;
-               }
-               break;
-       }
-
-       return 1;
-}
-
-static inline size_t sizeof_decl_arg(decl_arg *darg) {
-       size_t size;
-       decl_type *real = real_decl_type(darg->type);
-
-       if (darg->var->array_size) {
-               if (darg->var->pointer_level > 2) {
-                       size = psi_t_size(PSI_T_POINTER) * darg->var->array_size;
-               } else {
-                       size = psi_t_size(real->type) * darg->var->array_size;
-               }
-       } else if (darg->var->pointer_level) {
-               size = psi_t_size(PSI_T_POINTER);
-       } else {
-               switch (real->type) {
-               case PSI_T_UNION:
-                       size = real->real.unn->size;
-                       break;
-               case PSI_T_STRUCT:
-                       size = real->real.strct->size;
-                       break;
-               case PSI_T_ENUM:
-               default:
-                       size = psi_t_size(real->type);
-                       break;
-               }
-       }
-
-       ZEND_ASSERT(size);
-
-       return size;
-}
-
-static inline size_t alignof_decl_type(decl_type *t);
-static inline size_t alignof_decl_arg(decl_arg *darg);
-static inline size_t alignof_decl_union(decl_union *u);
-static inline size_t alignof_decl_struct(decl_struct *s);
-
-static inline size_t alignof_decl_args(decl_args *args) {
-       size_t i, maxalign = 0;
-
-       for (i = 0; i < args->count; ++i) {
-               decl_arg *darg = args->args[i];
-               size_t align = alignof_decl_arg(darg);
-
-               if (align > maxalign) {
-                       maxalign = align;
-               }
-       }
-
-       return maxalign;
-}
-
-static inline size_t alignof_decl_struct(decl_struct *s) {
-       if (!s->align) {
-               s->align = alignof_decl_args(s->args);
-       }
-       return s->align;
-}
-
-static inline size_t alignof_decl_union(decl_union *u) {
-       if (!u->align) {
-               u->align = alignof_decl_args(u->args);
-       }
-       return u->align;
-}
-
-static inline size_t alignof_decl_type(decl_type *t) {
-       decl_type *real = real_decl_type(t);
-       size_t align;
-
-       switch (real->type) {
-       case PSI_T_STRUCT:
-               align = alignof_decl_struct(real->real.strct);
-               break;
-       case PSI_T_UNION:
-               align = alignof_decl_union(real->real.unn);
-               break;
-       case PSI_T_ENUM:
-       default:
-               align = psi_t_alignment(real->type);
-       }
-
-       return align;
-}
-
-static inline size_t alignof_decl_arg(decl_arg *darg) {
-       size_t align;
-
-       if (darg->var->pointer_level && (!darg->var->array_size || darg->var->pointer_level > 2)) {
-               align = psi_t_alignment(PSI_T_POINTER);
-       } else {
-               align = alignof_decl_type(darg->type);
-       }
-
-       return align;
-}
-
-static inline size_t align_decl_arg(decl_arg *darg, size_t *pos, size_t *len) {
-       size_t align = alignof_decl_arg(darg);
-
-       ZEND_ASSERT(align);
-
-       *len = sizeof_decl_arg(darg);
-       *pos = psi_align(align, *pos);
-
-       return align;
-}
-
-static inline int validate_decl_struct(struct psi_data *data, decl_struct *s) {
-       size_t i, pos, len, size, align;
-
-       if (!s->size && !s->args->count) {
-               data->error(data, s->token, PSI_WARNING,
-                               "Cannot compute size of empty struct '%s'",
-                               s->name);
-               return 0;
-       }
-
-       for (i = 0; i < s->args->count; ++i) {
-               decl_arg *darg = s->args->args[i];
-
-               if (!validate_decl_arg(data, darg)) {
-                       return 0;
-               }
-
-               ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
-               darg->var->arg = darg;
-
-               if (!validate_decl_struct_darg(data, darg, s)) {
-                       return 0;
-               } else if (darg->layout) {
-                       pos = darg->layout->pos;
-
-                       align = align_decl_arg(darg, &pos, &len);
-
-                       if (darg->layout->len != len) {
-                               data->error(data, darg->token, PSI_WARNING,
-                                               "Computed size %zu of %s.%s does not match"
-                                               " pre-defined size %zu of type '%s'",
-                                               len, s->name, darg->var->name, darg->layout->len,
-                                               darg->type->name);
-                       }
-                       if (darg->layout->pos != pos) {
-                               data->error(data, darg->token, PSI_WARNING,
-                                               "Computed offset %zu of %s.%s does not match"
-                                               " pre-defined offset %zu",
-                                               pos, s->name, darg->var->name, darg->layout->pos);
-                       }
-               } else  {
-                       if (i) {
-                               pos = s->args->args[i-1]->layout->pos +
-                                               s->args->args[i-1]->layout->len;
-                       } else {
-                               pos = 0;
-                       }
-
-                       align = align_decl_arg(darg, &pos, &len);
-                       darg->layout = init_decl_struct_layout(pos, len);
-               }
-
-               if (align > s->align) {
-                       s->align = align;
-               }
-       }
-
-       psi_sort_struct_args((void **) s->args->args, s->args->count);
-
-       if (s->args->count) {
-               decl_arg *darg = s->args->args[s->args->count-1];
-
-               size = darg->layout->pos + darg->layout->len;
-               if (s->size < size) {
-                       s->size = psi_align(size, s->align);
-               }
-       }
-
-       return 1;
-}
-
-static inline int validate_decl_union(struct psi_data *data, decl_union *u) {
-       size_t i, pos, len, size = 0, align;
-
-       if (!u->size && !u->args->count) {
-               data->error(data, u->token, PSI_WARNING,
-                               "Cannot compute size of empty union %s",
-                               u->name);
-               return 0;
-       }
-
-       for (i = 0; i < u->args->count; ++i) {
-               decl_arg *darg = u->args->args[i];
-
-               if (!validate_decl_arg(data, darg)) {
-                       return 0;
-               }
-
-               ZEND_ASSERT(!darg->var->arg || darg->var->arg == darg);
-               darg->var->arg = darg;
-
-               if (!validate_decl_struct_darg(data, darg, u)) {
-                       return 0;
-               } else if (darg->layout) {
-                       pos = darg->layout->pos;
-
-                       align = align_decl_arg(darg, &pos, &len);
-
-                       if (darg->layout->pos != 0) {
-                               data->error(data, darg->token, PSI_WARNING,
-                                               "Offset of %s.%s should be 0",
-                                               u->name, darg->var->name);
-                               darg->layout->pos = 0;
-                       }
-                       if (darg->layout->len != len) {
-                               data->error(data, darg->token, PSI_WARNING,
-                                               "Computed size %zu of %s.%s does not match"
-                                               " pre-defined size %zu of type '%s'",
-                                               len, u->name, darg->var->name, darg->layout->len,
-                                               darg->type->name);
-                       }
-               } else {
-                       pos = 0;
-
-                       align = align_decl_arg(darg, &pos, &len);
-                       darg->layout = init_decl_struct_layout(pos, len);
-
-               }
-               if (len > size) {
-                       size = len;
-               }
-               if (align > u->align) {
-                       u->align = align;
-               }
-       }
-
-       psi_sort_struct_args((void **) u->args->args, u->args->count);
-
-       if (u->size < size) {
-               u->size = psi_align(size, u->align);
-       }
-
-       return 1;
-}
-
-static const char * const abi_ccs[] = {
-               "default", /* \                 */
-               "extern",  /*  > - all the same */
-               "cdecl",   /* /                 */
-               "mscdecl",
-               "stdcall",
-               "fastcall",
-};
-static inline int validate_decl_abi(struct psi_data *data, decl_abi *abi) {
-       size_t i;
-
-       for (i = 0; i < sizeof(abi_ccs)/sizeof(char*); ++i) {
-               if (strcasecmp(abi->convention, abi_ccs[i])) {
-                       return 1;
-               }
-       }
-       return 0;
-}
-static inline int validate_decl_func(struct psi_data *data, void *dl, decl *decl, decl_arg *func)
-{
-       struct psi_func_redir *redir;
-
-       if (!strcmp(func->var->name, "dlsym")) {
-               data->error(data, func->token, PSI_WARNING, "Cannot dlsym dlsym (sic!)");
-               return 0;
-       }
-
-       for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
-               if (!strcmp(func->var->name, redir->name)) {
-                       decl->call.sym = redir->func;
-               }
-       }
-       if (!decl->call.sym) {
-#ifndef RTLD_NEXT
-# define RTLD_NEXT ((void *) -1l)
-#endif
-               decl->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
-               if (!decl->call.sym) {
-                       data->error(data, func->token, PSI_WARNING,
-                               "Failed to locate symbol '%s': %s",
-                               func->var->name, dlerror() ?: "not found");
-               }
-       }
-       return 1;
-}
-static inline int validate_decl_nodl(struct psi_data *data, decl *decl) {
-       if (!validate_decl_abi(data, decl->abi)) {
-               data->error(data, decl->abi->token, PSI_WARNING,
-                               "Invalid calling convention: '%s'", decl->abi->token->text);
-               return 0;
-       }
-       if (!validate_decl_arg(data, decl->func)) {
-               return 0;
-       }
-       if (decl->args) {
-               size_t i;
-
-               for (i = 0; i < decl->args->count; ++i) {
-                       if (!validate_decl_arg(data, decl->args->args[i])) {
-                               return 0;
-                       }
-               }
-       }
-       return 1;
-}
-static inline int validate_decl(struct psi_data *data, void *dl, decl *decl) {
-       if (!validate_decl_nodl(data, decl)) {
-               return 0;
-       }
-       if (!validate_decl_func(data, dl, decl, decl->func)) {
-               return 0;
-       }
-       return 1;
-}
-static inline decl_arg *locate_decl_arg(decl_args *args, const char *name) {
-       size_t i;
-
-       if (args) for (i = 0; i < args->count; ++i) {
-               decl_arg *arg = args->args[i];
-
-               if (!strcmp(name, arg->var->name)) {
-                       return arg;
-               }
-       }
-
-       return NULL;
-}
-static inline decl_arg *locate_decl_var_arg(decl_var *var, decl_args *args, decl_arg *func) {
-       decl_arg *arg = locate_decl_arg(args, var->name);
-
-       if (arg) {
-               ZEND_ASSERT(!var->arg || var->arg == arg);
-               return var->arg = arg;
-       }
-
-       if (func && !strcmp(var->name, func->var->name)) {
-               return var->arg = func;
-       }
-
-       return NULL;
-}
-static inline decl_arg *locate_struct_member(decl_struct *s, decl_var *var) {
-       if (s->args) {
-               return locate_decl_var_arg(var, s->args, NULL);
-       }
-
-       return NULL;
-}
-static inline decl_arg *locate_union_member(decl_union *u, decl_var *var) {
-       if (u->args) {
-               return locate_decl_var_arg(var, u->args, NULL);
-       }
-
-       return NULL;
-}
-static inline constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
-       size_t i;
-
-       for (i = 0; i < consts->count; ++i) {
-               constant *cnst = consts->list[i];
-
-               if (!strcmp(cnst->name, exp->u.numb)) {
-                       free(exp->u.numb);
-                       return exp->u.cnst = cnst;
-               }
-       }
-
-       return NULL;
-}
-static inline decl_enum_item *locate_num_exp_enum_item_ex(num_exp *exp, decl_enum *e) {
-       size_t k;
-
-       if (e) for (k = 0; k < e->items->count; ++k) {
-               decl_enum_item *i = e->items->list[k];
-
-               if (!strcmp(i->name, exp->u.dvar->name)) {
-                       free_decl_var(exp->u.dvar);
-                       exp->t = PSI_T_ENUM;
-                       exp->u.enm = i;
-                       return i;
-               }
-       }
-       return NULL;
-}
-static inline decl_enum_item *locate_num_exp_enum_item(num_exp *exp, decl_enums *enums) {
-       size_t j;
-
-       if (enums) for (j = 0; j < enums->count; ++j) {
-               decl_enum *e = enums->list[j];
-               decl_enum_item *i = locate_num_exp_enum_item_ex(exp, e);
-
-               if (i) {
-                       return i;
-               }
-       }
-       return NULL;
-}
-static inline int validate_num_exp(struct psi_data *data, num_exp *exp, decl_args *dargs, decl_arg *func, decl_enum *enm) {
-       if (exp->operand) {
-               switch (exp->operator) {
-               case PSI_T_PLUS:
-                       exp->calculator = psi_calc_add;
-                       break;
-               case PSI_T_MINUS:
-                       exp->calculator = psi_calc_sub;
-                       break;
-               case PSI_T_ASTERISK:
-                       exp->calculator = psi_calc_mul;
-                       break;
-               case PSI_T_SLASH:
-                       exp->calculator = psi_calc_div;
-                       break;
-               EMPTY_SWITCH_DEFAULT_CASE();
-               }
-               if (!validate_num_exp(data, exp->operand, dargs, func, enm)) {
-                       return 0;
-               }
-       }
-       switch (exp->t) {
-       case PSI_T_NAME:
-               if (!locate_decl_var_arg(exp->u.dvar, dargs, func)) {
-                       if (!locate_num_exp_enum_item(exp, data->enums) && !locate_num_exp_enum_item_ex(exp, enm)) {
-                               data->error(data, exp->token, PSI_WARNING, "Unknown variable '%s' in numeric expression",
-                                               exp->u.dvar->name);
-                               return 0;
-                       }
-               }
-               return 1;
-       case PSI_T_NSNAME:
-               if (!locate_num_exp_constant(exp, data->consts)) {
-                       data->error(data, exp->token, PSI_WARNING, "Unknown constant '%s' in numeric expression",
-                                       exp->u.numb);
-                       return 0;
-               }
-               return 1;
-       case PSI_T_NUMBER:
-       case PSI_T_ENUM:
-               return 1;
-       default:
-               return 0;
-       }
-}
-
-static inline int validate_decl_enum(struct psi_data *data, decl_enum *e) {
-       size_t j;
-
-       if (!e->items || !e->items->count) {
-               data->error(data, e->token, PSI_WARNING, "Empty enum '%s'", e->name);
-               return 0;
-       }
-
-       for (j = 0; j < e->items->count; ++j) {
-               decl_enum_item *i = e->items->list[j];
-
-               if (!i->num) {
-                       if (j) {
-                               i->inc.t = PSI_T_NUMBER;
-                               i->inc.u.numb = "1";
-                               i->inc.operator = PSI_T_PLUS;
-                               i->inc.operand = i->prev->num ?: &i->prev->inc;
-                               i->num = &i->inc;
-                       } else {
-                               i->inc.t = PSI_T_NUMBER;
-                               i->inc.u.numb = "0";
-                               i->num = &i->inc;
-                       }
-               }
-               if (!validate_num_exp(data, i->num, NULL, NULL, e)) {
-                       return 0;
-               }
-       }
-
-       return 1;
-}
-
-static inline int validate_set_value_handler(set_value *set) {
-       switch (set->func->type) {
-       case PSI_T_TO_BOOL:             set->func->handler = psi_to_bool;               break;
-       case PSI_T_TO_INT:              set->func->handler = psi_to_int;                break;
-       case PSI_T_TO_FLOAT:    set->func->handler = psi_to_double;             break;
-       case PSI_T_TO_STRING:   set->func->handler = psi_to_string;             break;
-       case PSI_T_TO_ARRAY:    set->func->handler = psi_to_array;              break;
-       case PSI_T_TO_OBJECT:   set->func->handler = psi_to_object;             break;
-       case PSI_T_VOID:                set->func->handler = psi_to_void;               break;
-       case PSI_T_ZVAL:                set->func->handler = psi_to_zval;               break;
-       case PSI_T_ELLIPSIS:
-               if (set->outer.set && set->outer.set->func->type == PSI_T_TO_ARRAY) {
-                       set->func->handler = psi_to_recursive;
-                       set->inner = set->outer.set->inner;
-                       break;
-               }
-               /* no break */
-       default:
-               return 0;
-       }
-       return 1;
-}
-static inline void decl_var_arg_v(decl_args *args, va_list argp) {
-       int argc;
-       decl_arg **argv;
-
-       memset(args, 0, sizeof(*args));
-
-       while ((argc = va_arg(argp, int))) {
-               argv = va_arg(argp, decl_arg **);
-               while (argc--) {
-                       add_decl_arg(args, *argv++);
-               }
-       }
-}
-static inline int validate_set_value_ex(struct psi_data *data, set_value *set, decl_arg *ref, decl_args *ref_list) {
-       size_t i;
-       decl_type *ref_type;
-       decl_var *set_var = set->vars->vars[0];
-
-       if (!validate_set_value_handler(set)) {
-               data->error(data, set->func->token, PSI_WARNING, "Invalid cast '%s' in `set` statement", set->func->name);
-               return 0;
-       }
-
-       for (i = 0; i < set->vars->count; ++i) {
-               decl_var *svar = set->vars->vars[i];
-               if (!svar->arg && !locate_decl_var_arg(svar, ref_list, NULL)) {
-                       data->error(data, svar->token, PSI_WARNING, "Unknown variable '%s' in `set` statement", svar->name);
-                       return 0;
-               }
-       }
-
-       if (!ref) {
-               ref = set_var->arg;
-       }
-       ref_type = real_decl_type(ref->type);
-
-       if (set->inner && set->inner->count) {
-               int is_to_array = (set->func->type == PSI_T_TO_ARRAY);
-               int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
-
-               if (!is_to_array && !is_pointer_to_struct) {
-                       data->error(data, set->func->token, E_WARNING, "Inner `set` statement casts only work with "
-                                       "to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
-                       return 0;
-               }
-       }
-       if (set->num) {
-               if (!validate_num_exp(data, set->num, ref_list, ref, NULL)) {
-                       return 0;
-               }
-       }
-
-       if (set->inner && (ref_type->type == PSI_T_STRUCT || ref_type->type == PSI_T_UNION)) {
-               /* to_array(struct, to_...) */
-               if (!set->outer.set || set->outer.set->inner->vals != set->inner->vals) {
-                       for (i = 0; i < set->inner->count; ++i) {
-                               decl_var *sub_var = set->inner->vals[i]->vars->vars[0];
-                               decl_arg *sub_ref;
-
-                               switch (ref_type->type) {
-                               case PSI_T_STRUCT:
-                                       sub_ref = locate_struct_member(ref_type->real.strct, sub_var);
-                                       break;
-                               case PSI_T_UNION:
-                                       sub_ref = locate_union_member(ref_type->real.unn, sub_var);
-                                       break;
-                               }
-
-                               if (sub_ref) {
-                                       if (!validate_set_value_ex(data, set->inner->vals[i], sub_ref, ref_type->real.strct->args)) {
-                                               return 0;
-                                       }
-                               }
-                       }
-               }
-       } else if (set->inner && set->inner->count == 1) {
-               /* to_array(ptr, to_string(*ptr)) */
-               decl_var *sub_var = set->inner->vals[0]->vars->vars[0];
-               decl_arg *sub_ref = locate_decl_var_arg(sub_var, ref_list, ref);
-
-               if (sub_ref) {
-                       if (strcmp(sub_var->name, set_var->name)) {
-                               data->error(data, sub_var->token, E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
-                               return 0;
-                       }
-                       if (!validate_set_value_ex(data, set->inner->vals[0], sub_ref, ref_list)) {
-                               return 0;
-                       }
-               }
-       } else if (set->inner && set->inner->count > 1) {
-               data->error(data, set->func->token, E_WARNING,
-                               "Inner `set` statement casts on pointers may only occur once, "
-                               "unless the outer type is a scruct or union, got '%s%.*s'",
-                               ref_type->name, PSI_PRINT_POINTER_LEVEL(ref->var->pointer_level));
-               return 0;
-       }
-
-       return 1;
-}
-static inline int validate_set_value(struct psi_data *data, set_value *set, ...) {
-       va_list argp;
-       decl_args args = {0};
-       int check;
-
-       va_start(argp, set);
-       decl_var_arg_v(&args, argp);
-       va_end(argp);
-
-       check = validate_set_value_ex(data, set, NULL, &args);
-       if (args.args) {
-               free(args.args);
-       }
-       return check;
-}
-static inline decl *locate_impl_decl(decls *decls, return_stmt *ret) {
-       if (decls) {
-               size_t i;
-
-               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(struct 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(data, impl->stmts->ret.list[1]->token, 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(data, impl->func->token, 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(data, ret->token, PSI_WARNING,
-                               "Missing declaration '%s' for `return` statment for implementation %s",
-                               ret->set->vars->vars[0]->name, impl->func->name);
-               return 0;
-       }
-
-       if (!validate_set_value(data, ret->set, 1, &ret->decl, impl->decl->args ? (int) impl->decl->args->count : 0, impl->decl->args ? impl->decl->args->args : NULL, 0)) {
-               return 0;
-       }
-
-       //impl->decl->impl = impl;
-
-       return 1;
-}
-
-static inline impl_arg *locate_impl_var_arg(impl_var *var, impl_args *args) {
-       size_t i;
-
-       for (i = 0; i < args->count; ++i) {
-               impl_arg *iarg = args->args[i];
-
-               if (!strcmp(var->name, iarg->var->name)) {
-                       return var->arg = iarg;
-               }
-       }
-
-       return NULL;
-}
-
-static inline int validate_let_val(struct psi_data *data, let_val *val, decl_var *let_var, impl *impl);
-
-static inline const char *locate_let_val_varname(let_val *val) {
-       if (val) {
-               switch (val->kind) {
-               case PSI_LET_CALLBACK:
-                       return &val->data.callback->func->var->name[1];
-               case PSI_LET_FUNC:
-                       return &val->data.func->var->name[1];
-               default:
-                       break;
-               }
-       }
-       return NULL;
-}
-
-static inline int validate_let_func(struct psi_data *data, let_func *func, decl_var *let_var, impl *impl) {
-       if (func->outer) {
-
-       }
-       if (impl->func->args) {
-               locate_impl_var_arg(func->var, impl->func->args);
-       }
-       if (!func->var->arg && !func->ref) {
-               data->error(data, func->var->token, PSI_WARNING,
-                               "Unknown variable '%s%s' of `let` statement"
-                               " for cast '%s' of implementation '%s'",
-                               *func->var->name == '$' ? "" : "$",
-                               func->var->name, func->name, impl->func->name);
-               return 0;
-       }
-       switch (func->type) {
-       case PSI_T_BOOLVAL:             func->handler = psi_let_boolval;        break;
-       case PSI_T_INTVAL:              func->handler = psi_let_intval;         break;
-       case PSI_T_FLOATVAL:    func->handler = psi_let_floatval;       break;
-       case PSI_T_STRVAL:              func->handler = psi_let_strval;         break;
-       case PSI_T_STRLEN:              func->handler = psi_let_strlen;         break;
-       case PSI_T_PATHVAL:             func->handler = psi_let_pathval;        break;
-       case PSI_T_ARRVAL:              func->handler = psi_let_arrval;         break;
-       case PSI_T_OBJVAL:              func->handler = psi_let_objval;         break;
-       case PSI_T_ZVAL:                func->handler = psi_let_zval;           break;
-       case PSI_T_VOID:                func->handler = psi_let_void;           break;
-       EMPTY_SWITCH_DEFAULT_CASE();
-       }
-
-       if (func->inner) {
-               size_t i;
-               decl_type *var_typ = real_decl_type(let_var->arg->type);
-               decl_args *sub_args;
-
-               switch (var_typ->type) {
-               case PSI_T_STRUCT:
-                       sub_args = var_typ->real.strct->args;
-                       break;
-               case PSI_T_UNION:
-                       sub_args = var_typ->real.unn->args;
-                       break;
-               default:
-                       data->error(data, let_var->token, PSI_WARNING,
-                                       "Inner let statement's values must refer to a structure type, got '%s' for '%s'",
-                                       real_decl_type(let_var->arg->type)->name, let_var->name);
-                       return 0;
-               }
-
-               for (i = 0; i < func->inner->count; ++i) {
-                       let_val *inner = func->inner->vals[i];
-                       let_val *outer = func->outer;
-                       const char *name = locate_let_val_varname(inner);
-                       decl_arg *sub_arg;
-
-                       if (name) {
-                               sub_arg = locate_decl_arg(sub_args, name);
-                       }
-                       if (!name || !sub_arg) {
-                               data->error(data, let_var->token, PSI_WARNING,
-                                               "Unknown variable '%s' of '%s'",
-                                               name,
-                                               var_typ->real.strct->name);
-                               return 0;
-                       }
-                       if (!validate_let_val(data, inner, sub_arg->var, impl)) {
-                               return 0;
-                       }
-               }
-       }
-       return 1;
-}
-
-static inline int validate_let_callback(struct psi_data *data, decl_var *cb_var, let_callback *cb, impl *impl) {
-       size_t i;
-       decl *cb_func;
-       decl_type *cb_type = real_decl_type(cb_var->arg->type);
-
-       if (!validate_let_func(data, cb->func, cb_var, impl)) {
-               return 0;
-       }
-
-       if (cb_type->type != PSI_T_FUNCTION) {
-               data->error(data, cb_var->token, PSI_WARNING, "Not a function: %s", cb_var->name);
-               return 0;
-       }
-       cb_func = cb_type->real.func;
-       for (i = 0; i < cb->args->count; ++i) {
-               if (!validate_set_value(data, cb->args->vals[i], cb_func->args->count, cb_func->args->args, 0)) {
-                       return 0;
-               }
-       }
-
-       if (!validate_decl_nodl(data, cb_func)) {
-               return 0;
-       }
-
-       cb->decl = cb_func;
-
-       return 1;
-}
-
-static inline int validate_let_val(struct psi_data *data, let_val *val, decl_var *let_var, impl *impl) {
-
-       switch (val->kind) {
-       case PSI_LET_NULL:
-               break;
-       case PSI_LET_TMP:
-               if (!let_var) {
-                       data->error(data, NULL, PSI_WARNING,
-                                       "Ivalid let statement value of implementation '%s'",
-                                       impl->func->name);
-                       return 0;
-               }
-               /* e.g. let bar = &strval($bar); // decl_arg(char **bar) */
-               /* e.g. let foo = *bar;  */
-               let_var->pointer_level = val->data.var->pointer_level;
-               let_var->arg = init_decl_arg(
-                               init_decl_type(
-                                               real_decl_type(val->data.var->arg->type)->type,
-                                               real_decl_type(val->data.var->arg->type)->name),
-                               init_decl_var(
-                                               let_var->name,
-                                               let_var->pointer_level,
-                                               let_var->array_size));
-               break;
-       case PSI_LET_NUMEXP:
-               if (!validate_num_exp(data, val->data.num, impl->decl->args, impl->decl->func, NULL)) {
-                       return 0;
-               }
-               break;
-       case PSI_LET_CALLOC:
-               if (!validate_num_exp(data, val->data.alloc->nmemb, impl->decl->args, impl->decl->func, NULL)) {
-                       return 0;
-               }
-               if (!validate_num_exp(data, val->data.alloc->size, impl->decl->args, impl->decl->func, NULL)) {
-                       return 0;
-               }
-               break;
-       case PSI_LET_CALLBACK:
-               if (!let_var) {
-                       data->error(data, NULL, PSI_WARNING,
-                                       "Ivalid let statement value of implementation '%s'",
-                                       impl->func->name);
-                       return 0;
-               }
-               if (val->data.callback->func->inner) {
-                       size_t i;
-                       decl_type *var_typ = real_decl_type(let_var->arg->type);
-                       decl_args *sub_args;
-
-                       switch (var_typ->type) {
-                       case PSI_T_STRUCT:
-                               sub_args = var_typ->real.strct->args;
-                               break;
-                       case PSI_T_UNION:
-                               sub_args = var_typ->real.unn->args;
-                               break;
-                       default:
-                               data->error(data, let_var->token, PSI_WARNING,
-                                               "Inner let statement's values must refer to a structure type, got '%s' for '%s'",
-                                               real_decl_type(let_var->arg->type)->name, let_var->name);
-                               return 0;
-                       }
-                       for (i = 0; i < val->data.callback->func->inner->count; ++i) {
-                               let_val *inner = val->data.callback->func->inner->vals[i];
-                               switch (inner->kind) {
-                               case PSI_LET_FUNC:
-                                       inner->data.func->outer = val;
-                                       inner->data.func->ref = locate_decl_arg(sub_args,
-                                                       &inner->data.func->var->name[1]);
-                                       break;
-
-                                       break;
-                               case PSI_LET_CALLBACK:
-                                       inner->data.callback->func->outer = val;
-                                       inner->data.callback->func->ref = locate_decl_arg(sub_args,
-                                                       &inner->data.callback->func->var->name[1]);
-                                       break;
-                               }
-                       }
-               }
-               if (!validate_let_callback(data, let_var, val->data.callback, impl)) {
-                       return 0;
-               }
-               break;
-       case PSI_LET_FUNC:
-               if (val->data.func->inner) {
-                       size_t i;
-                       decl_type *var_typ = real_decl_type(let_var->arg->type);
-                       decl_args *sub_args;
-
-                       switch (var_typ->type) {
-                       case PSI_T_STRUCT:
-                               sub_args = var_typ->real.strct->args;
-                               break;
-                       case PSI_T_UNION:
-                               sub_args = var_typ->real.unn->args;
-                               break;
-                       default:
-                               data->error(data, let_var->token, PSI_WARNING,
-                                               "Inner let statement's values must refer to a structure type, got '%s' for '%s'",
-                                               real_decl_type(let_var->arg->type)->name, let_var->name);
-                               return 0;
-                       }
-                       for (i = 0; i < val->data.func->inner->count; ++i) {
-                               let_val *inner = val->data.func->inner->vals[i];
-                               switch (inner->kind) {
-                               case PSI_LET_FUNC:
-                                       inner->data.func->outer = val;
-                                       inner->data.func->ref = locate_decl_arg(sub_args,
-                                                       &inner->data.func->var->name[1]);
-                                       break;
-                               case PSI_LET_CALLBACK:
-                                       inner->data.callback->func->outer = val;
-                                       inner->data.callback->func->ref = locate_decl_arg(sub_args,
-                                                       &inner->data.callback->func->var->name[1]);
-                                       break;
-                               }
-                       }
-               }
-
-               val->data.func->var;
-
-               if (!validate_let_func(data, val->data.func, let_var, impl)) {
-                       return 0;
-               }
-               break;
-       }
-
-       return 1;
-}
-
-static inline int validate_impl_let_stmts(struct psi_data *data, impl *impl) {
-       size_t i, j;
-       /* we can have multiple let stmts */
-
-       /* check that we have a decl arg and impl arg for every let stmt */
-       for (i = 0; i < impl->stmts->let.count; ++i) {
-               let_stmt *let = impl->stmts->let.list[i];
-               decl_var *let_var;
-               impl_var *let_ivar = NULL;
-
-               if (let->val && let->val->kind == PSI_LET_TMP) {
-                       let_var = let->val->data.var;
-               } else {
-                       let_var = let->var;
-               }
-
-               if (!locate_decl_var_arg(let_var, impl->decl->args, impl->decl->func)) {
-                       data->error(data, let_var->token, PSI_WARNING, "Unknown variable '%s' in `let` statement"
-                                       " of implementation '%s'", let_var->name, impl->func->name);
-                       return 0;
-               }
-               switch (let->val->kind) {
-               case PSI_LET_CALLBACK:
-                       let_ivar = let->val->data.callback->func->var;
-                       break;
-               case PSI_LET_FUNC:
-                       let_ivar = let->val->data.func->var;
-                       break;
-               default:
-                       break;
-               }
-               if (let_ivar && !locate_impl_var_arg(let_ivar, impl->func->args)) {
-                       data->error(data, let_var->token, PSI_WARNING, "Unknown variable '%s' in `let` statement"
-                                       " of implementation '%s'", let_ivar->name, impl->func->name);
-                       return 0;
-               }
-
-               if (!validate_let_val(data, let->val, let->var, impl)) {
-                       return 0;
-               }
-       }
-       /* 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)) {
-                               check = 1;
-                               break;
-                       }
-               }
-               if (!check) {
-                       data->error(data, impl->func->token, 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;
-               }
-       }
-
-       return 1;
-}
-static inline int validate_impl_set_stmts(struct 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(data, set->var->token, 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;
-                                               set_var->arg = set_arg;
-                                               if (!validate_set_value(data, set->val, 1, &set_arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
-                                                       return 0;
-                                               }
-                                               break;
-                                       }
-                               }
-                       }
-                       if (!check) {
-                               for (k = 0; k < impl->stmts->let.count; ++k) {
-                                       let_stmt *let = impl->stmts->let.list[k];
-
-                                       /* check temp vars */
-                                       if (let->val && let->val->kind == PSI_LET_TMP) {
-                                               if (!strcmp(set_var->name, let->var->name)) {
-                                                       check = 1;
-                                                       set_var->arg = let->var->arg;
-                                                       if (!validate_set_value(data, set->val, 1, &set_var->arg, 1, &impl->decl->func, impl->decl->args->count, impl->decl->args->args, 0)) {
-                                                               return 0;
-                                                       }
-                                                       break;
-                                               }
-                                       }
-                               }
-                       }
-
-                       if (!check) {
-                               data->error(data, set_var->token, 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 decl *locate_free_decl(decls *decls, free_call *f) {
-       if (decls)  {
-               size_t i;
-
-               for (i = 0; i < decls->count; ++i) {
-                       if (!strcmp(decls->list[i]->func->var->name, f->func)) {
-                               f->decl = decls->list[i];
-                               return decls->list[i];
-                       }
-               }
-       }
-
-       return NULL;
-}
-static inline int validate_impl_free_stmts(struct psi_data *data, impl *impl) {
-       size_t i, j, k, l;
-       /* 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->calls->count; ++j) {
-                       free_call *free_call = fre->calls->list[j];
-
-                       /* first find the decl of the free func */
-                       if (!locate_free_decl(data->decls, free_call)) {
-                               data->error(data, free_call->token, PSI_WARNING,
-                                               "Missing declaration '%s' in `free` statement"
-                                               " of implementation '%s'",
-                                               free_call->func, impl->func->name);
-                               return 0;
-                       }
-
-
-
-                       /* now check for known vars */
-                       for (l = 0; l < free_call->vars->count; ++l) {
-                               int check = 0;
-                               decl_var *free_var = free_call->vars->vars[l];
-
-                               if (!strcmp(free_var->name, impl->decl->func->var->name)) {
-                                       check = 1;
-                                       free_var->arg = impl->decl->func;
-                               } else 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(data, free_var->token, 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(struct psi_data *data, impl *impl) {
-       if (!impl->stmts) {
-               data->error(data, impl->func->token, 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;
-}
-
-static inline int validate_impl_args(struct psi_data *data, impl *impl) {
-       int def = 0;
-       size_t i;
-
-       for (i = 0; i < impl->func->args->count; ++i) {
-               impl_arg *iarg = impl->func->args->args[i];
-
-               if (iarg->def) {
-                       def = 1;
-               } else if (def) {
-                       data->error(data, impl->func->token, PSI_WARNING,
-                                       "Non-optional argument %zu '$%s' of implementation '%s'"
-                                       " follows optional argument",
-                                       i+1, iarg->var->name, impl->func->name);
-                       return 0;
-               }
-       }
-
-       return 1;
-}
-
-static inline int validate_impl(struct psi_data *data, impl *impl) {
-       if (!validate_impl_args(data, impl)) {
-               return 0;
-       }
-       return validate_impl_stmts(data, impl);
-}
-
-
-int psi_context_validate(struct psi_context *C, struct psi_parser *P)
-{
-       struct psi_data *D;
-       void *dlopened = NULL;
-       size_t i, count = C->count++, check_round, check_count;
-       decl_typedefs *check_defs = P->defs;
-       decl_structs *check_structs = P->structs;
-       decl_unions *check_unions = P->unions;
-       decl_enums *check_enums = P->enums;
-       unsigned flags = C->flags;
-
-       C->data = realloc(C->data, C->count * sizeof(*C->data));
-       D = psi_data_exchange(&C->data[count], PSI_DATA(P));
-
-#define REVALIDATE(what) do { \
-               if (check_round && check_ ##what) { \
-                       free(check_ ##what->list); \
-                       free(check_ ##what); \
-               } \
-               check_ ##what = recheck_ ##what; \
-} while (0)
-#define CHECK_TOTAL (CHECK_COUNT(defs) + CHECK_COUNT(structs) + CHECK_COUNT(enums))
-#define CHECK_COUNT(of) (check_ ##of ? check_ ##of->count : 0)
-
-       if (!(flags & PSI_PARSER_SILENT)) {
-               /* no warnings on first round */
-               C->flags |= PSI_PARSER_SILENT;
-       }
-       for (check_round = 0, check_count = 0; CHECK_TOTAL && check_count != CHECK_TOTAL; ++check_round) {
-               decl_typedefs *recheck_defs = NULL;
-               decl_structs *recheck_structs = NULL;
-               decl_unions *recheck_unions = NULL;
-               decl_enums *recheck_enums = NULL;
-
-               check_count = CHECK_TOTAL;
-
-               for (i = 0; i < CHECK_COUNT(defs); ++i) {
-                       if (validate_decl_typedef(PSI_DATA(C), check_defs->list[i])) {
-                               C->defs = add_decl_typedef(C->defs, check_defs->list[i]);
-                       } else {
-                               recheck_defs = add_decl_typedef(recheck_defs, check_defs->list[i]);
-                       }
-               }
-               for (i = 0; i < CHECK_COUNT(structs); ++i) {
-                       if (validate_decl_struct(PSI_DATA(C), check_structs->list[i])) {
-                               C->structs = add_decl_struct(C->structs, check_structs->list[i]);
-                       } else {
-                               recheck_structs = add_decl_struct(recheck_structs, check_structs->list[i]);
-                       }
-               }
-               for (i = 0; i < CHECK_COUNT(unions); ++i) {
-                       if (validate_decl_union(PSI_DATA(C), check_unions->list[i])) {
-                               C->unions = add_decl_union(C->unions, check_unions->list[i]);
-                       } else {
-                               recheck_unions = add_decl_union(recheck_unions, check_unions->list[i]);
-                       }
-               }
-               for (i = 0; i < CHECK_COUNT(enums); ++i) {
-                       if (validate_decl_enum(PSI_DATA(C), check_enums->list[i])) {
-                               C->enums = add_decl_enum(C->enums, check_enums->list[i]);
-                       } else {
-                               recheck_enums = add_decl_enum(recheck_enums, check_enums->list[i]);
-                       }
-               }
-
-               REVALIDATE(defs);
-               REVALIDATE(structs);
-               REVALIDATE(unions);
-               REVALIDATE(enums);
-
-               if (check_round == 0 && !(flags & PSI_PARSER_SILENT)) {
-                       C->flags ^= PSI_PARSER_SILENT;
-               }
-       }
-
-       C->flags = flags;
-
-       if (D->consts) {
-               for (i = 0; i < D->consts->count; ++i) {
-                       if (validate_constant(PSI_DATA(C), D->consts->list[i])) {
-                               C->consts = add_constant(C->consts, D->consts->list[i]);
-                       }
-               }
-       }
-
-       if (!validate_lib(D, &dlopened)) {
-               return 0;
-       }
-
-       add_decl_lib(&C->psi.libs, dlopened);
-
-       if (D->decls) {
-               for (i = 0; i < D->decls->count; ++i) {
-                       if (validate_decl(PSI_DATA(C), dlopened, D->decls->list[i])) {
-                               C->decls = add_decl(C->decls, D->decls->list[i]);
-                       }
-               }
-       }
-       if (D->impls) {
-               for (i = 0; i < D->impls->count; ++i) {
-                       if (validate_impl(PSI_DATA(C), D->impls->list[i])) {
-                               C->impls = add_impl(C->impls, D->impls->list[i]);
-                       }
-               }
-       }
-
-       return 1;
-}
-
-int psi_context_validate_data(struct psi_data *dest, struct psi_data *source)
-{
-       size_t i;
-       int errors = 0;
-
-       if (source->defs) for (i = 0; i < source->defs->count; ++i) {
-               decl_arg *def = source->defs->list[i];
-
-               if (validate_decl_typedef(source, def)) {
-                       if (dest) {
-                               dest->defs = add_decl_typedef(dest->defs, def);
-                       }
-               } else {
-                       ++errors;
-               }
-       }
-
-       if (source->consts) for (i = 0; i < source->consts->count; ++i) {
-               constant *constant = source->consts->list[i];
-
-               if (validate_constant(source, constant)) {
-                       if (dest) {
-                               dest->consts = add_constant(dest->consts, constant);
-                       }
-               } else {
-                       ++errors;
-               }
-       }
-
-       if (source->structs) for (i = 0; i < source->structs->count; ++i) {
-               decl_struct *dstruct = source->structs->list[i];
-
-               if (validate_decl_struct(source, dstruct)) {
-                       if (dest) {
-                               dest->structs = add_decl_struct(dest->structs, dstruct);
-                       }
-               } else {
-                       ++errors;
-               }
-       }
-
-       if (source->unions) for (i = 0; i < source->unions->count; ++i) {
-               decl_union *dunion = source->unions->list[i];
-
-               if (validate_decl_union(source, dunion)) {
-                       if (dest) {
-                               dest->unions = add_decl_union(dest->unions, dunion);
-                       }
-               } else {
-                       ++errors;
-               }
-       }
-
-       if (source->enums) for (i = 0; i < source->enums->count; ++i) {
-               decl_enum *denum = source->enums->list[i];
-
-               if (validate_decl_enum(source, denum)) {
-                       if (dest) {
-                               dest->enums = add_decl_enum(dest->enums, denum);
-                       }
-               } else {
-                       ++errors;
-               }
-       }
-
-       if (source->decls) for (i = 0; i < source->decls->count; ++i) {
-               decl *decl = source->decls->list[i];
-
-               if (validate_decl(source, NULL, decl)) {
-                       if (dest) {
-                               dest->decls = add_decl(dest->decls, decl);
-                       }
-               } else {
-                       ++errors;
-               }
-       }
-
-       if (source->impls) for (i = 0; i < source->impls->count; ++i) {
-               impl *impl = source->impls->list[i];
-
-               if (validate_impl(source, impl)) {
-                       if (dest) {
-                               dest->impls = add_impl(dest->impls, impl);
-                       }
-               } else {
-                       ++errors;
-               }
-       }
-
-       return errors;
-}