--- /dev/null
+/*******************************************************************************
+ Copyright (c) 2016, Michael Wallner <mike@php.net>.
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+ this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************/
+
+#include "php_psi_stdinc.h"
+#include "data.h"
+#include "call.h"
+
+#include <assert.h>
+
+struct psi_let_exp *psi_let_exp_init_ex(struct psi_decl_var *var,
+ enum psi_let_exp_kind kind, void *data)
+{
+ struct psi_let_exp *val = psi_let_exp_init(kind, data);
+ val->var = var;
+ return val;
+}
+
+struct psi_let_exp *psi_let_exp_init(enum psi_let_exp_kind kind, void *data)
+{
+ struct psi_let_exp *let = calloc(1, sizeof(*let));
+ switch (let->kind = kind) {
+ case PSI_LET_NULL:
+ assert(!data);
+ break;
+ case PSI_LET_NUMEXP:
+ let->data.num = data;
+ break;
+ case PSI_LET_CALLOC:
+ let->data.alloc = data;
+ break;
+ case PSI_LET_CALLBACK:
+ let->data.callback = data;
+ break;
+ case PSI_LET_FUNC:
+ let->data.func = data;
+ break;
+ case PSI_LET_TMP:
+ let->data.var = data;
+ break;
+ default:
+ assert(0);
+ }
+ return let;
+}
+
+void psi_let_exp_free(struct psi_let_exp **let_ptr)
+{
+ if (*let_ptr) {
+ struct psi_let_exp *let = *let_ptr;
+
+ *let_ptr = NULL;
+ switch (let->kind) {
+ case PSI_LET_NULL:
+ break;
+ case PSI_LET_NUMEXP:
+ psi_num_exp_free(&let->data.num);
+ break;
+ case PSI_LET_CALLOC:
+ psi_let_calloc_free(&let->data.alloc);
+ break;
+ case PSI_LET_CALLBACK:
+ psi_let_callback_free(&let->data.callback);
+ break;
+ case PSI_LET_FUNC:
+ psi_let_func_free(&let->data.func);
+ break;
+ case PSI_LET_TMP:
+ psi_decl_var_free(&let->data.var);
+ break;
+ default:
+ assert(0);
+ }
+ if (let->var) {
+ psi_decl_var_free(&let->var);
+ }
+ free(let);
+ }
+}
+
+void psi_let_exp_dump(int fd, struct psi_let_exp *val, unsigned level, int last)
+{
+ if (level > 1) {
+ /* only if not directly after `set ...` */
+ dprintf(fd, "%s", psi_t_indent(level));
+ }
+
+ if (val->var) {
+ if (val->var->token) {
+ psi_decl_var_dump(fd, val->var);
+ dprintf(fd, " = ");
+ }
+ }
+ if (val->is_reference) {
+ dprintf(fd, "&");
+ }
+
+ switch (val->kind) {
+ case PSI_LET_NULL:
+ dprintf(fd, "NULL");
+ break;
+ case PSI_LET_TMP:
+ psi_decl_var_dump(fd, val->data.var);
+ dprintf(fd, "\t/* fqn=%s */", val->data.var->fqn);
+ break;
+ case PSI_LET_CALLOC:
+ psi_let_calloc_dump(fd, val->data.alloc);
+ break;
+ case PSI_LET_CALLBACK:
+ psi_let_callback_dump(fd, val->data.callback, level);
+ break;
+ case PSI_LET_FUNC:
+ psi_let_func_dump(fd, val->data.func, level);
+ break;
+ case PSI_LET_NUMEXP:
+ psi_num_exp_dump(fd, val->data.num);
+ break;
+
+ default:
+ assert(0);
+ }
+
+ if (val->var) {
+ dprintf(fd, "\t/* fqn=%s */", val->var->fqn);
+ }
+
+ if (level > 1) {
+ if (!last) {
+ dprintf(fd, ",");
+ }
+ } else {
+ dprintf(fd, ";");
+ }
+}
+
+bool psi_let_exp_validate(struct psi_data *data, struct psi_let_exp *val,
+ struct psi_impl *impl)
+{
+ struct psi_decl_var *dvar = psi_let_exp_get_decl_var(val);
+
+ switch (val->kind) {
+ case PSI_LET_TMP:
+ if (!psi_decl_var_validate(data, val->data.var, impl->decl, val, NULL)) {
+ data->error(data, dvar->token ? : **(struct psi_token ***) &val->data,
+ PSI_WARNING, "Unknown variable '%s'", dvar->name);
+ return false;
+ }
+ break;
+
+ default:
+ if (!psi_decl_var_validate(data, dvar, impl->decl, val, NULL)) {
+ data->error(data, dvar->token ? : **(struct psi_token ***) &val->data,
+ PSI_WARNING, "Unknown variable '%s'", dvar->name);
+ return false;
+ }
+ break;
+ }
+
+ switch (val->kind) {
+ case PSI_LET_NULL:
+ break;
+ case PSI_LET_TMP:
+ /* e.g. let bar = &strval($bar); // decl_arg(char **bar) */
+ /* e.g. let foo = *bar; */
+ val->var->pointer_level = val->data.var->pointer_level;
+ val->var->arg = val->data.var->arg;
+ break;
+ case PSI_LET_NUMEXP:
+ if (!psi_num_exp_validate(data, val->data.num, impl, NULL, val, NULL, NULL)) {
+ return false;
+ }
+ break;
+ case PSI_LET_CALLOC:
+ if (!psi_num_exp_validate(data, val->data.alloc->nmemb, impl, NULL, val, NULL, NULL)) {
+ return false;
+ }
+ if (!psi_num_exp_validate(data, val->data.alloc->size, impl, NULL, val, NULL, NULL)) {
+ return false;
+ }
+ break;
+ case PSI_LET_CALLBACK:
+ if (!psi_let_func_validate(data, val, val->data.callback->func, impl)) {
+ return false;
+ }
+ if (!psi_let_callback_validate(data, val, val->data.callback, impl)) {
+ return false;
+ }
+ break;
+ case PSI_LET_FUNC:
+ if (!psi_let_func_validate(data, val, val->data.func, impl)) {
+ return false;
+ }
+ break;
+ }
+
+ return true;
+}
+
+void *psi_let_exp_exec(struct psi_let_exp *val, struct psi_decl_arg *darg,
+ void *actual_location, size_t actual_size, struct psi_call_frame *frame)
+{
+ struct psi_call_frame_symbol *frame_sym;
+
+ frame_sym = psi_call_frame_fetch_symbol(frame, val->var);
+
+ switch (val->kind) {
+ case PSI_LET_NULL:
+ /* FIXME: sizeof_decl_arg */
+ if (darg && darg->var->array_size) {
+ frame_sym->temp_val.ptr = ecalloc(1, psi_decl_arg_get_size(darg));
+ } else {
+ memset(&frame_sym->temp_val, 0, sizeof(frame_sym->temp_val));
+ }
+ break;
+
+ case PSI_LET_TMP:
+ {
+ struct psi_let_stmt *let_temp = psi_impl_get_let(frame->impl,
+ val->data.var);
+ struct psi_call_frame_symbol *temp_arg;
+
+ temp_arg = psi_call_frame_fetch_symbol(frame, let_temp->exp->var);
+ frame_sym->temp_val = *deref_impl_val(temp_arg->ptr, val->data.var);
+ }
+ break;
+
+ case PSI_LET_CALLOC:
+ {
+ zend_long n = psi_long_num_exp(val->data.alloc->nmemb, frame);
+ zend_long s = psi_long_num_exp(val->data.alloc->size, frame);
+ void *tmp = *psi_call_frame_push_auto(frame,
+ safe_emalloc(n, s, sizeof(void *)));
+
+ memset(tmp, 0, n * s + sizeof(void *));
+ frame_sym->temp_val.ptr = tmp;
+ }
+ break;
+
+ case PSI_LET_NUMEXP:
+ frame_sym->temp_val.zend.lval = psi_long_num_exp(val->data.num, frame);
+ break;
+
+ case PSI_LET_CALLBACK:
+ frame_sym->temp_val.ptr = val->data.callback->decl->sym;
+ break;
+
+ case PSI_LET_FUNC:
+ if (!psi_let_func_exec(val, val->data.func, darg, frame)) {
+ return NULL;
+ }
+ break;
+ }
+
+ if (val->is_reference) {
+ frame_sym->ptr = &frame_sym->ival_ptr;
+ } else {
+ frame_sym->ptr = frame_sym->ival_ptr;
+ }
+
+ if (actual_location) {
+ assert(!val->is_reference || actual_size == SIZEOF_VOID_P);
+ memcpy(actual_location, frame_sym->ptr, actual_size);
+ frame_sym->ptr = actual_location;
+ }
+
+ return frame_sym->ptr;
+}
+
+struct psi_let_func* psi_let_exp_get_func(struct psi_let_exp* exp)
+{
+ if (exp) {
+ switch (exp->kind) {
+ case PSI_LET_CALLBACK:
+ return exp->data.callback->func;
+ case PSI_LET_FUNC:
+ return exp->data.func;
+ default:
+ break;
+ }
+ }
+ return NULL;
+}
+
+struct psi_decl_var *psi_let_exp_get_decl_var(struct psi_let_exp *val)
+{
+ if (!val->var) {
+ const char *name = psi_let_exp_get_decl_var_name(val);
+
+ if (name) {
+ val->var = psi_decl_var_init(name, 0, 0);
+ }
+ }
+ return val->var;
+}
+
+struct psi_impl_var *psi_let_exp_get_impl_var(struct psi_let_exp *val)
+{
+ struct psi_let_func* fn = psi_let_exp_get_func(val);
+ return fn ? fn->var : NULL;
+}
+
+const char* psi_let_exp_get_decl_var_name(struct psi_let_exp* val)
+{
+ struct psi_impl_var* var;
+ if (val->var) {
+ return val->var->name;
+ }
+ var = psi_let_exp_get_impl_var(val);
+ if (var) {
+ return &var->name[1];
+ }
+ return NULL;
+}
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