new operator must return JSObject even for errors.

[cycript.git] / sig / parse.cpp

diff --git a/sig/parse.cpp b/sig/parse.cpp
index 05b321373a762960cc500abb8592fac9e18dacb5..20fa5a2474536ca4d0a3af83c29a8169e64e395d 100644 (file)
--- a/sig/parse.cpp
+++ b/sig/parse.cpp
@@ -1,64 +1,46 @@
-/* Cycript - Remove Execution Server and Disassembler
- * Copyright (C) 2009  Jay Freeman (saurik)
+/* Cycript - The Truly Universal Scripting Language
+ * Copyright (C) 2009-2016  Jay Freeman (saurik)

 */
 
 */
 

-/* Modified BSD License {{{ */
+/* GNU Affero General Public License, Version 3 {{{ */

 /*
 /*

- *        Redistribution and use in source and binary
- * forms, with or without modification, are permitted
- * provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the
- *    above copyright notice, this list of conditions
- *    and the following disclaimer.
- * 2. 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.
- * 3. The name of the author may not be used to endorse
- *    or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
-*/
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+**/

 /* }}} */
 
 /* }}} */
 

-#include <apr_strings.h>

 #include "sig/parse.hpp"
 #include "Error.hpp"
 
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
 #include "sig/parse.hpp"
 #include "Error.hpp"
 
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>

+#include <sstream>

 
 namespace sig {
 
 
 namespace sig {
 

-void Parse_(apr_pool_t *pool, struct Signature *signature, const char **name, char eos, Callback callback);
-struct Type *Parse_(apr_pool_t *pool, const char **name, char eos, bool named, Callback callback);
+void Parse_(CYPool &pool, struct Signature *signature, const char **name, char eos, Callback callback);
+struct Type *Parse_(CYPool &pool, const char **name, char eos, bool named, Callback callback);

 
 
 /* XXX: I really screwed up this time */
 
 
 /* XXX: I really screwed up this time */

-void *prealloc_(apr_pool_t *pool, void *odata, size_t osize, size_t nsize) {
-    void *ndata = apr_palloc(pool, nsize);
+void *prealloc_(CYPool &pool, void *odata, size_t osize, size_t nsize) {
+    void *ndata(pool.malloc<void>(nsize));

     memcpy(ndata, odata, osize);
     return ndata;
 }
 
     memcpy(ndata, odata, osize);
     return ndata;
 }
 

-void Parse_(apr_pool_t *pool, struct Signature *signature, const char **name, char eos, Callback callback) {
+void Parse_(CYPool &pool, struct Signature *signature, const char **name, char eos, Callback callback) {

     _assert(*name != NULL);
 
     // XXX: this is just a stupid check :(
     _assert(*name != NULL);
 
     // XXX: this is just a stupid check :(


@@ -81,8 +63,8 @@ void Parse_(apr_pool_t *pool, struct Signature *signature, const char **name, ch
         if (**name != '"')
             element->name = NULL;
         else {
         if (**name != '"')
             element->name = NULL;
         else {

-            char *quote = strchr(++*name, '"');
-            element->name = apr_pstrmemdup(pool, *name, quote - *name);
+            const char *quote = strchr(++*name, '"');
+            element->name = pool.strmemdup(*name, quote - *name);

             *name = quote + 1;
         }
 
             *name = quote + 1;
         }
 


@@ -100,195 +82,359 @@ void Parse_(apr_pool_t *pool, struct Signature *signature, const char **name, ch
     }
 }
 
     }
 }
 

-struct Type *Parse_(apr_pool_t *pool, const char **name, char eos, bool named, Callback callback) {
-    char next = *(*name)++;
-    if (next == '?')
-        return NULL;
+Type *Parse_(CYPool &pool, const char **encoding, char eos, bool named, Callback callback) {
+    char next = *(*encoding)++;

 
 

-    struct Type *type = (struct Type *) apr_palloc(pool, sizeof(struct Type));
-    _assert(type != NULL);
-    memset(type, 0, sizeof(struct Type));
+    Type *type;
+    uint8_t flags(0);

 
   parse:
     switch (next) {
 
   parse:
     switch (next) {

-        case '#': type->primitive = typename_P; break;
+        case '?': type = new(pool) Unknown(); break;
+
+#ifdef CY_OBJECTIVEC
+        case '#': type = new(pool) Meta(); break;
+#endif

 
         case '(':
 
         case '(':

-            if (type->data.signature.count < 2)
-                type->primitive = struct_P;
-            else
-                type->primitive = union_P;
+            type = new(pool) Aggregate(true);

             next = ')';
         goto aggregate;
 
             next = ')';
         goto aggregate;
 

-        case '*': type->primitive = string_P; break;
-        case ':': type->primitive = selector_P; break;
+        case '*': type = new(pool) String(); break;

 
 

-        case '@':
-            if (**name == '"') {
-                char *quote = strchr(*name + 1, '"');
-                if (!named || quote[1] == eos || quote[1] == '"') {
-                    type->name = apr_pstrmemdup(pool, *name + 1, quote - *name - 1);
-                    *name = quote + 1;
-                }
-            }
+#ifdef CY_OBJECTIVEC
+        case ':': type = new(pool) Selector(); break;

 
 

-            type->primitive = object_P;
-        break;
+        case '@': {
+            char next(**encoding);

 
 

-        case 'B': type->primitive = boolean_P; break;
-        case 'C': type->primitive = uchar_P; break;
-        case 'I': type->primitive = uint_P; break;
-        case 'L': type->primitive = ulong_P; break;
-        case 'Q': type->primitive = ulonglong_P; break;
-        case 'S': type->primitive = ushort_P; break;
-
-        case '[':
-            type->primitive = array_P;
-            type->data.data.size = strtoul(*name, (char **) name, 10);
-            type->data.data.type = Parse_(pool, name, eos, false, callback);
-            if (**name != ']') {
-                printf("']' != \"%s\"\n", *name);
-                _assert(false);
+            if (next == '?') {
+                type = new(pool) Block();
+                ++*encoding;
+            } else {
+                const char *name;
+                if (next != '"')
+                    name = NULL;
+                else {
+                    const char *quote = strchr(*encoding + 1, '"');
+                    if (quote == NULL)
+                        CYThrow("unterminated specific id type {%s}", *encoding - 10);
+                    else if (!named || quote[1] == eos || quote[1] == '"') {
+                        name = pool.strmemdup(*encoding + 1, quote - *encoding - 1);
+                        *encoding = quote + 1;
+                    } else {
+                        name = NULL;
+                    }
+                }
+
+                type = new(pool) Object(name);

             }
             }

-            ++*name;
-        break;
+
+        } break;
+#endif
+
+        case 'B': type = new(pool) Primitive<bool>(); break;
+        case 'C': type = new(pool) Primitive<unsigned char>(); break;
+        case 'I': type = new(pool) Primitive<unsigned int>(); break;
+        case 'L': type = new(pool) Primitive<unsigned long>(); break;
+        case 'Q': type = new(pool) Primitive<unsigned long long>(); break;
+        case 'S': type = new(pool) Primitive<unsigned short>(); break;
+
+        case '[': {
+            size_t size(strtoul(*encoding, (char **) encoding, 10));
+            type = new(pool) Array(*Parse_(pool, encoding, eos, false, callback), size);
+            if (**encoding != ']')
+                CYThrow("']' != \"%s\"", *encoding);
+            ++*encoding;
+        } break;

 
         case '^':
 
         case '^':

-            type->primitive = pointer_P;
-            if (**name == '"') {
-                type->data.data.type = NULL;
-            } else {
-                type->data.data.type = Parse_(pool, name, eos, named, callback);
-                sig::Type *&target(type->data.data.type);
-                if (target != NULL && target->primitive == void_P)
-                    target = NULL;
+            if (**encoding == '"')
+                _assert(false); // XXX: why is this here?!?
+            else {
+                type = Parse_(pool, encoding, eos, named, callback);
+#ifdef CY_OBJECTIVEC
+                Aggregate *aggregate(dynamic_cast<Aggregate *>(type));
+                if (aggregate != NULL && strcmp(aggregate->name, "_objc_class") == 0)
+                    type = new(pool) Meta();
+                else
+#endif
+                    type = new(pool) Pointer(*type);

             }
         break;
 
         case 'b':
             }
         break;
 
         case 'b':

-            type->primitive = bit_P;
-            type->data.data.size = strtoul(*name, (char **) name, 10);
+            type = new(pool) Bits(strtoul(*encoding, (char **) encoding, 10));

         break;
 
         break;
 

-        case 'c': type->primitive = char_P; break;
-        case 'd': type->primitive = double_P; break;
-        case 'f': type->primitive = float_P; break;
-        case 'i': type->primitive = int_P; break;
-        case 'l': type->primitive = long_P; break;
-        case 'q': type->primitive = longlong_P; break;
-        case 's': type->primitive = short_P; break;
-        case 'v': type->primitive = void_P; break;
+        case 'c': type = new(pool) Primitive<signed char>(); break;
+        case 'd': type = new(pool) Primitive<double>(); break;
+        case 'f': type = new(pool) Primitive<float>(); break;
+        case 'i': type = new(pool) Primitive<signed int>(); break;
+        case 'l': type = new(pool) Primitive<signed long>(); break;
+        case 'q': type = new(pool) Primitive<signed long long>(); break;
+        case 's': type = new(pool) Primitive<short>(); break;
+        case 'v': type = new(pool) Void(); break;
+
+#ifdef __SIZEOF_INT128__
+        case 't': type = new(pool) Primitive<signed __int128>(); break;
+        case 'T': type = new(pool) Primitive<unsigned __int128>(); break;
+#endif

 
         case '{':
 
         case '{':

-            type->primitive = struct_P;
+            type = new(pool) Aggregate(false);

             next = '}';
         goto aggregate;
 
         aggregate: {
             next = '}';
         goto aggregate;
 
         aggregate: {

+            Aggregate *aggregate(static_cast<Aggregate *>(type));
+

             char end = next;
             char end = next;

-            const char *begin = *name;
-            do next = *(*name)++;
-            while (
-                next != '=' &&
-                next != '}'
-            );
-            size_t length = *name - begin - 1;
+            const char *begin = *encoding;
+            do switch (next = *(*encoding)++) {
+                case '\0':
+                    _assert(false);
+                case '}':
+                    // XXX: this is actually a type reference
+                    aggregate->signature.count = _not(size_t);
+                    next = '='; // this is a "break". I'm sorry
+            } while (next != '=');
+
+            size_t length = *encoding - begin - 1;

             if (strncmp(begin, "?", length) != 0)
             if (strncmp(begin, "?", length) != 0)

-                type->name = (char *) apr_pstrmemdup(pool, begin, length);
-            else
-                type->name = NULL;
+                aggregate->name = (char *) pool.strmemdup(begin, length);

 
 

-            // XXX: this types thing is a throwback to JocStrap
+            if (aggregate->signature.count == _not(size_t))
+                aggregate->signature.elements = NULL;
+            else
+                Parse_(pool, &aggregate->signature, encoding, end, callback);

 
 

-            char *types;
-            if (next != '=') {
-                types = NULL;
-            } else {
-                const char *temp(*name);
-                Parse_(pool, &type->data.signature, name, end, callback);
-                types = (char *) apr_pstrmemdup(pool, temp, *name - temp - 1);
-            }
+            // XXX: this is a hack to support trivial unions
+            if (aggregate->signature.count <= 1)
+                aggregate->overlap = false;

 
             if (callback != NULL)
 
             if (callback != NULL)

-                (*callback)(pool, type->name, types, type);
+                type = (*callback)(pool, aggregate);

         } break;
 
         } break;
 

-        case 'N': type->flags |= JOC_TYPE_INOUT; goto next;
-        case 'n': type->flags |= JOC_TYPE_IN; goto next;
-        case 'O': type->flags |= JOC_TYPE_BYCOPY; goto next;
-        case 'o': type->flags |= JOC_TYPE_OUT; goto next;
-        case 'R': type->flags |= JOC_TYPE_BYREF; goto next;
-        case 'r': type->flags |= JOC_TYPE_CONST; goto next;
-        case 'V': type->flags |= JOC_TYPE_ONEWAY; goto next;
+        case 'r': flags |= JOC_TYPE_CONST; goto next;
+
+        case 'n': flags |= JOC_TYPE_IN; goto next;
+        case 'N': flags |= JOC_TYPE_INOUT; goto next;
+        case 'o': flags |= JOC_TYPE_OUT; goto next;
+        case 'O': flags |= JOC_TYPE_BYCOPY; goto next;
+        case 'R': flags |= JOC_TYPE_BYREF; goto next;
+        case 'V': flags |= JOC_TYPE_ONEWAY; goto next;

 
         next:
 
         next:

-            next = *(*name)++;
+            next = *(*encoding)++;

             goto parse;
         break;
 
         default:
             goto parse;
         break;
 
         default:

-            printf("invalid type character: '%c' {%s}\n", next, *name - 10);
-            _assert(false);
+            CYThrow("invalid type character: '%c' {%s}", next, *encoding - 10);

     }
 
     }
 

+    type->flags = flags;
+

     return type;
 }
 
     return type;
 }
 

-void Parse(apr_pool_t *pool, struct Signature *signature, const char *name, Callback callback) {
+void Parse(CYPool &pool, struct Signature *signature, const char *name, Callback callback) {

     const char *temp = name;
     Parse_(pool, signature, &temp, '\0', callback);
     _assert(temp[-1] == '\0');
 }
 
     const char *temp = name;
     Parse_(pool, signature, &temp, '\0', callback);
     _assert(temp[-1] == '\0');
 }
 

-const char *Unparse(apr_pool_t *pool, struct Signature *signature) {
+const char *Unparse(CYPool &pool, const struct Signature *signature) {

     const char *value = "";
     size_t offset;
 
     for (offset = 0; offset != signature->count; ++offset) {
         const char *type = Unparse(pool, signature->elements[offset].type);
     const char *value = "";
     size_t offset;
 
     for (offset = 0; offset != signature->count; ++offset) {
         const char *type = Unparse(pool, signature->elements[offset].type);

-        value = apr_pstrcat(pool, value, type, NULL);
+        value = pool.strcat(value, type, NULL);

     }
 
     return value;
 }
 
     }
 
     return value;
 }
 

-const char *Unparse(apr_pool_t *pool, struct Type *type) {
-    if (type == NULL)
-        return "?";
-    else switch (type->primitive) {
-        case typename_P: return "#";
-        case union_P: return apr_psprintf(pool, "(%s)", Unparse(pool, &type->data.signature));
-        case string_P: return "*";
-        case selector_P: return ":";
-        case object_P: return type->name == NULL ? "@" : apr_psprintf(pool, "@\"%s\"", type->name);
-        case boolean_P: return "B";
-        case uchar_P: return "C";
-        case uint_P: return "I";
-        case ulong_P: return "L";
-        case ulonglong_P: return "Q";
-        case ushort_P: return "S";
-
-        case array_P: {
-            const char *value = Unparse(pool, type->data.data.type);
-            return apr_psprintf(pool, "[%lu%s]", type->data.data.size, value);
-        } break;
+template <>
+const char *Primitive<bool>::Encode(CYPool &pool) const {
+    return "B";
+}

 
 

-        case pointer_P: return apr_psprintf(pool, "^%s", type->data.data.type == NULL ? "v" : Unparse(pool, type->data.data.type));
-        case bit_P: return apr_psprintf(pool, "b%zu", type->data.data.size);
-        case char_P: return "c";
-        case double_P: return "d";
-        case float_P: return "f";
-        case int_P: return "i";
-        case long_P: return "l";
-        case longlong_P: return "q";
-        case short_P: return "s";
-        case void_P: return "v";
-        case struct_P: return apr_psprintf(pool, "{%s=%s}", type->name == NULL ? "?" : type->name, Unparse(pool, &type->data.signature));
-    }
+template <>
+const char *Primitive<char>::Encode(CYPool &pool) const {
+    return "c";
+}
+
+template <>
+const char *Primitive<double>::Encode(CYPool &pool) const {
+    return "d";
+}
+
+template <>
+const char *Primitive<float>::Encode(CYPool &pool) const {
+    return "f";
+}
+
+template <>
+const char *Primitive<signed char>::Encode(CYPool &pool) const {
+    return "c";
+}
+
+template <>
+const char *Primitive<signed int>::Encode(CYPool &pool) const {
+    return "i";
+}
+
+#ifdef __SIZEOF_INT128__
+template <>
+const char *Primitive<signed __int128>::Encode(CYPool &pool) const {
+    return "t";
+}
+#endif
+
+template <>
+const char *Primitive<signed long int>::Encode(CYPool &pool) const {
+    return "l";
+}
+
+template <>
+const char *Primitive<signed long long int>::Encode(CYPool &pool) const {
+    return "q";
+}
+
+template <>
+const char *Primitive<signed short int>::Encode(CYPool &pool) const {
+    return "s";
+}
+
+template <>
+const char *Primitive<unsigned char>::Encode(CYPool &pool) const {
+    return "C";
+}
+
+template <>
+const char *Primitive<unsigned int>::Encode(CYPool &pool) const {
+    return "I";
+}
+
+#ifdef __SIZEOF_INT128__
+template <>
+const char *Primitive<unsigned __int128>::Encode(CYPool &pool) const {
+    return "T";
+}
+#endif
+
+template <>
+const char *Primitive<unsigned long int>::Encode(CYPool &pool) const {
+    return "L";
+}
+
+template <>
+const char *Primitive<unsigned long long int>::Encode(CYPool &pool) const {
+    return "Q";
+}
+
+template <>
+const char *Primitive<unsigned short int>::Encode(CYPool &pool) const {
+    return "S";
+}
+
+const char *Void::Encode(CYPool &pool) const {
+    return "v";
+}
+
+const char *Unknown::Encode(CYPool &pool) const {
+    return "?";
+}
+
+const char *String::Encode(CYPool &pool) const {
+    return "*";
+}
+
+#ifdef CY_OBJECTIVEC
+const char *Meta::Encode(CYPool &pool) const {
+    return "#";
+}
+
+const char *Selector::Encode(CYPool &pool) const {
+    return ":";
+}
+#endif
+
+const char *Bits::Encode(CYPool &pool) const {
+    return pool.strcat("b", pool.itoa(size), NULL);
+}
+
+const char *Pointer::Encode(CYPool &pool) const {
+    return pool.strcat("^", type.Encode(pool), NULL);
+}
+
+const char *Array::Encode(CYPool &pool) const {
+    return pool.strcat("[", pool.itoa(size), type.Encode(pool), "]", NULL);
+}
+
+#ifdef CY_OBJECTIVEC
+const char *Object::Encode(CYPool &pool) const {
+    return name == NULL ? "@" : pool.strcat("@\"", name, "\"", NULL);
+}
+#endif
+
+const char *Enum::Encode(CYPool &pool) const {
+    return type.Encode(pool);
+}

 
 

-    _assert(false);
-    return NULL;
+const char *Aggregate::Encode(CYPool &pool) const {
+    bool reference(signature.count == _not(size_t));
+    return pool.strcat(overlap ? "(" : "{",
+        name == NULL ? "?" : name,
+        reference ? "" : "=",
+        reference ? "" : Unparse(pool, &signature),
+    overlap ? ")" : "}", NULL);
+}
+
+const char *Function::Encode(CYPool &pool) const {
+    return "?";
+}
+
+#ifdef CY_OBJECTIVEC
+const char *Block::Encode(CYPool &pool) const {
+    return "@?";
+}
+#endif
+
+const char *Unparse(CYPool &pool, const struct Type *type) {
+    const char *base(type->Encode(pool));
+    if (type->flags == 0)
+        return base;
+
+    #define iovec_(base, size) \
+        (struct iovec) {const_cast<char *>(base), size}
+
+    size_t size(strlen(base));
+    char buffer[7 + size];
+    size_t offset(0);
+
+    if ((type->flags & JOC_TYPE_INOUT) != 0)
+        buffer[offset++] = 'N';
+    if ((type->flags & JOC_TYPE_IN) != 0)
+        buffer[offset++] = 'n';
+    if ((type->flags & JOC_TYPE_BYCOPY) != 0)
+        buffer[offset++] = 'O';
+    if ((type->flags & JOC_TYPE_OUT) != 0)
+        buffer[offset++] = 'o';
+    if ((type->flags & JOC_TYPE_BYREF) != 0)
+        buffer[offset++] = 'R';
+    if ((type->flags & JOC_TYPE_CONST) != 0)
+        buffer[offset++] = 'r';
+    if ((type->flags & JOC_TYPE_ONEWAY) != 0)
+        buffer[offset++] = 'V';
+
+    memcpy(buffer + offset, base, size);
+    return pool.strmemdup(buffer, offset + size);

 }
 
 }
 }
 
 }