Rename PLIST_UINT to PLIST_INT and add plist_new_int() and plist_get_int_val()

This properly supports getting and setting signed or unsigned integer values.
Also, a new helper function plist_int_val_is_negative() was added to determine if
a given #PLIST_INT node has a negative value or not.

The old type PLIST_UINT is defined as a macro with the value of PLIST_INT for
backwards compatibility.

This commit also adds int vs. uint support to the C++ interface, and the python
bindings in a hopefully useful way.

10 files changed, 121 insertions, 38 deletions

diff --git a/src/Integer.cpp b/src/Integer.cpp
index a40d026..7fa0f93 100644
--- a/src/Integer.cpp
+++ b/src/Integer.cpp
@@ -24,7 +24,7 @@
 namespace PList
 {
 
-Integer::Integer(Node* parent) : Node(PLIST_UINT, parent)
+Integer::Integer(Node* parent) : Node(PLIST_INT, parent)
 {
 }
 
@@ -32,7 +32,7 @@ Integer::Integer(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Integer::Integer(const PList::Integer& i) : Node(PLIST_UINT)
+Integer::Integer(const PList::Integer& i) : Node(PLIST_INT)
 {
     plist_set_uint_val(_node, i.GetValue());
 }
@@ -44,11 +44,16 @@ Integer& Integer::operator=(const PList::Integer& i)
     return *this;
 }
 
-Integer::Integer(uint64_t i) : Node(PLIST_UINT)
+Integer::Integer(uint64_t i) : Node(PLIST_INT)
 {
     plist_set_uint_val(_node, i);
 }
 
+Integer::Integer(int64_t i) : Node(PLIST_INT)
+{
+    plist_set_int_val(_node, i);
+}
+
 Integer::~Integer()
 {
 }
@@ -58,16 +63,38 @@ Node* Integer::Clone() const
     return new Integer(*this);
 }
 
+void Integer::SetValue(int64_t i)
+{
+    plist_set_int_val(_node, i);
+}
+
 void Integer::SetValue(uint64_t i)
 {
     plist_set_uint_val(_node, i);
 }
 
-uint64_t Integer::GetValue() const
+void Integer::SetUnsignedValue(uint64_t i)
+{
+    plist_set_uint_val(_node, i);
+}
+
+int64_t Integer::GetValue() const
+{
+    int64_t i = 0;
+    plist_get_int_val(_node, &i);
+    return i;
+}
+
+uint64_t Integer::GetUnsignedValue() const
 {
     uint64_t i = 0;
     plist_get_uint_val(_node, &i);
     return i;
 }
 
+bool Integer::isNegative() const
+{
+    return plist_int_val_is_negative(_node);
+}
+
 }  // namespace PList
diff --git a/src/Key.cpp b/src/Key.cpp
index 5d7d372..5f8d205 100644
--- a/src/Key.cpp
+++ b/src/Key.cpp
@@ -32,7 +32,7 @@ Key::Key(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Key::Key(const PList::Key& k) : Node(PLIST_UINT)
+Key::Key(const PList::Key& k) : Node(PLIST_INT)
 {
     plist_set_key_val(_node, k.GetValue().c_str());
 }
diff --git a/src/Node.cpp b/src/Node.cpp
index fb79911..08a91b0 100644
--- a/src/Node.cpp
+++ b/src/Node.cpp
@@ -52,7 +52,7 @@ Node::Node(plist_type type, Node* parent) : _parent(parent)
     case PLIST_BOOLEAN:
         _node = plist_new_bool(0);
         break;
-    case PLIST_UINT:
+    case PLIST_INT:
         _node = plist_new_uint(0);
         break;
     case PLIST_REAL:
@@ -134,7 +134,7 @@ Node* Node::FromPlist(plist_t node, Node* parent)
         case PLIST_BOOLEAN:
             ret = new Boolean(node, parent);
             break;
-        case PLIST_UINT:
+        case PLIST_INT:
             ret = new Integer(node, parent);
             break;
         case PLIST_REAL:
diff --git a/src/Real.cpp b/src/Real.cpp
index 6bdb920..02d1d9b 100644
--- a/src/Real.cpp
+++ b/src/Real.cpp
@@ -32,7 +32,7 @@ Real::Real(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-Real::Real(const PList::Real& d) : Node(PLIST_UINT)
+Real::Real(const PList::Real& d) : Node(PLIST_INT)
 {
     plist_set_real_val(_node, d.GetValue());
 }
diff --git a/src/String.cpp b/src/String.cpp
index 06b61ba..aee2358 100644
--- a/src/String.cpp
+++ b/src/String.cpp
@@ -32,7 +32,7 @@ String::String(plist_t node, Node* parent) : Node(node, parent)
 {
 }
 
-String::String(const PList::String& s) : Node(PLIST_UINT)
+String::String(const PList::String& s) : Node(PLIST_INT)
 {
     plist_set_string_val(_node, s.GetValue().c_str());
 }
diff --git a/src/bplist.c b/src/bplist.c
index 851ecd6..8927de6 100644
--- a/src/bplist.c
+++ b/src/bplist.c
@@ -62,7 +62,7 @@ enum
     BPLIST_FALSE = 0x08,
     BPLIST_TRUE = 0x09,
     BPLIST_FILL = 0x0F,			/* will be used for length grabbing */
-    BPLIST_UINT = 0x10,
+    BPLIST_INT = 0x10,
     BPLIST_REAL = 0x20,
     BPLIST_DATE = 0x30,
     BPLIST_DATA = 0x40,
@@ -229,7 +229,7 @@ void plist_bin_deinit(void)
 
 static plist_t parse_bin_node_at_index(struct bplist_data *bplist, uint32_t node_index);
 
-static plist_t parse_uint_node(const char **bnode, uint8_t size)
+static plist_t parse_int_node(const char **bnode, uint8_t size)
 {
     plist_data_t data = plist_new_plist_data();
 
@@ -254,7 +254,7 @@ static plist_t parse_uint_node(const char **bnode, uint8_t size)
     data->intval = UINT_TO_HOST(*bnode, size);
 
     (*bnode) += size;
-    data->type = PLIST_UINT;
+    data->type = PLIST_INT;
 
     return node_create(NULL, data);
 }
@@ -583,8 +583,8 @@ static plist_t parse_bin_node(struct bplist_data *bplist, const char** object)
         case BPLIST_DICT:
         {
             uint16_t next_size = **object & BPLIST_FILL;
-            if ((**object & BPLIST_MASK) != BPLIST_UINT) {
-                PLIST_BIN_ERR("%s: invalid size node type for node type 0x%02x: found 0x%02x, expected 0x%02x\n", __func__, type, **object & BPLIST_MASK, BPLIST_UINT);
+            if ((**object & BPLIST_MASK) != BPLIST_INT) {
+                PLIST_BIN_ERR("%s: invalid size node type for node type 0x%02x: found 0x%02x, expected 0x%02x\n", __func__, type, **object & BPLIST_MASK, BPLIST_INT);
                 return NULL;
             }
             (*object)++;
@@ -641,12 +641,12 @@ static plist_t parse_bin_node(struct bplist_data *bplist, const char** object)
             return NULL;
         }
 
-    case BPLIST_UINT:
+    case BPLIST_INT:
         if (pobject + (uint64_t)(1 << size) > poffset_table) {
-            PLIST_BIN_ERR("%s: BPLIST_UINT data bytes point outside of valid range\n", __func__);
+            PLIST_BIN_ERR("%s: BPLIST_INT data bytes point outside of valid range\n", __func__);
             return NULL;
         }
-        return parse_uint_node(object, size);
+        return parse_int_node(object, size);
 
     case BPLIST_REAL:
         if (pobject + (uint64_t)(1 << size) > poffset_table) {
@@ -896,7 +896,7 @@ static unsigned int plist_data_hash(const void* key)
     switch (data->type)
     {
     case PLIST_BOOLEAN:
-    case PLIST_UINT:
+    case PLIST_INT:
     case PLIST_REAL:
     case PLIST_DATE:
     case PLIST_UID:
@@ -973,7 +973,7 @@ static void write_int(bytearray_t * bplist, uint64_t val)
     //do not write 3bytes int node
     if (size == 3)
         size++;
-    sz = BPLIST_UINT | Log2(size);
+    sz = BPLIST_INT | Log2(size);
 
     val = be64toh(val);
     byte_array_append(bplist, &sz, 1);
@@ -982,7 +982,7 @@ static void write_int(bytearray_t * bplist, uint64_t val)
 
 static void write_uint(bytearray_t * bplist, uint64_t val)
 {
-    uint8_t sz = BPLIST_UINT | 4;
+    uint8_t sz = BPLIST_INT | 4;
     uint64_t zero = 0;
 
     val = be64toh(val);
@@ -1346,7 +1346,7 @@ PLIST_API plist_err_t plist_to_bin(plist_t plist, char **plist_bin, uint32_t * l
             byte_array_append(bplist_buff, &b, 1);
             break;
         }
-        case PLIST_UINT:
+        case PLIST_INT:
             if (data->length == 16) {
                 write_uint(bplist_buff, data->intval);
             } else {
diff --git a/src/jplist.c b/src/jplist.c
index f4adf2f..7817b1c 100644
--- a/src/jplist.c
+++ b/src/jplist.c
@@ -131,7 +131,7 @@ static int node_to_json(node_t* node, bytearray_t **outbuf, uint32_t depth, int
         str_buf_append(*outbuf, "null", 4);
 	break;
 
-    case PLIST_UINT:
+    case PLIST_INT:
         val = (char*)malloc(64);
         if (node_data->length == 16) {
             val_len = snprintf(val, 64, "%"PRIu64, node_data->intval);
@@ -349,7 +349,7 @@ static int node_estimate_size(node_t *node, uint64_t *size, uint32_t depth, int
             *size += data->length;
             *size += 2;
             break;
-        case PLIST_UINT:
+        case PLIST_INT:
             if (data->length == 16) {
                 *size += num_digits_u(data->intval);
             } else {
@@ -501,10 +501,15 @@ static plist_t parse_primitive(const char* js, jsmntok_info_t* ti, int* index)
         val = plist_new_node(data);
     } else if (isdigit(str_val[0]) || (str_val[0] == '-' && str_val+1 < str_end && isdigit(str_val[1]))) {
         char* endp = (char*)str_val;
+        int is_neg = (str_val[0] == '-');
         int64_t intpart = parse_decimal(str_val, str_end, &endp);
         if (endp >= str_end) {
             /* integer */
-            val = plist_new_uint((uint64_t)intpart);
+            if (is_neg || intpart <= INT64_MAX) {
+                val = plist_new_int(intpart);
+            } else {
+                val = plist_new_uint((uint64_t)intpart);
+            }
         } else if ((*endp == '.' && endp+1 < str_end && isdigit(*(endp+1))) || ((*endp == 'e' || *endp == 'E') && endp+1 < str_end && (isdigit(*(endp+1)) || ((*(endp+1) == '-') && endp+2 < str_end && isdigit(*(endp+2)))))) {
             /* floating point */
             double dval = (double)intpart;
@@ -513,7 +518,6 @@ static plist_t parse_primitive(const char* js, jsmntok_info_t* ti, int* index)
             do {
                 if (*endp == '.') {
                     fendp++;
-                    int is_neg = (str_val[0] == '-');
                     double frac = 0;
                     double p = 0.1;
                     while (fendp < str_end && isdigit(*fendp)) {
diff --git a/src/oplist.c b/src/oplist.c
index 122440f..8936cce 100644
--- a/src/oplist.c
+++ b/src/oplist.c
@@ -146,7 +146,7 @@ static int node_to_openstep(node_t* node, bytearray_t **outbuf, uint32_t depth,
 
     switch (node_data->type)
     {
-    case PLIST_UINT:
+    case PLIST_INT:
         val = (char*)malloc(64);
         if (node_data->length == 16) {
             val_len = snprintf(val, 64, "%"PRIu64, node_data->intval);
@@ -393,7 +393,7 @@ static int node_estimate_size(node_t *node, uint64_t *size, uint32_t depth, int
             *size += data->length;
             *size += 2;
             break;
-        case PLIST_UINT:
+        case PLIST_INT:
             if (data->length == 16) {
                 *size += num_digits_u(data->intval);
             } else {
diff --git a/src/plist.c b/src/plist.c
index e696f70..5d06311 100644
--- a/src/plist.c
+++ b/src/plist.c
@@ -2,7 +2,7 @@
  * plist.c
  * Builds plist XML structures
  *
- * Copyright (c) 2009-2019 Nikias Bassen, All Rights Reserved.
+ * Copyright (c) 2009-2023 Nikias Bassen, All Rights Reserved.
  * Copyright (c) 2010-2015 Martin Szulecki, All Rights Reserved.
  * Copyright (c) 2008 Zach C., All Rights Reserved.
  *
@@ -390,7 +390,16 @@ PLIST_API plist_t plist_new_bool(uint8_t val)
 PLIST_API plist_t plist_new_uint(uint64_t val)
 {
     plist_data_t data = plist_new_plist_data();
-    data->type = PLIST_UINT;
+    data->type = PLIST_INT;
+    data->intval = val;
+    data->length = (val > INT_MAX) ? sizeof(uint64_t)*2 : sizeof(uint64_t);
+    return plist_new_node(data);
+}
+
+PLIST_API plist_t plist_new_int(int64_t val)
+{
+    plist_data_t data = plist_new_plist_data();
+    data->type = PLIST_INT;
     data->intval = val;
     data->length = sizeof(uint64_t);
     return plist_new_node(data);
@@ -926,7 +935,7 @@ static void plist_get_type_and_value(plist_t node, plist_type * type, void *valu
     case PLIST_BOOLEAN:
         *((char *) value) = data->boolval;
         break;
-    case PLIST_UINT:
+    case PLIST_INT:
     case PLIST_UID:
         *((uint64_t *) value) = data->intval;
         break;
@@ -1024,12 +1033,17 @@ PLIST_API void plist_get_uint_val(plist_t node, uint64_t * val)
         return;
     plist_type type = plist_get_node_type(node);
     uint64_t length = 0;
-    if (PLIST_UINT != type)
+    if (PLIST_INT != type)
         return;
     plist_get_type_and_value(node, &type, (void *) val, &length);
     assert(length == sizeof(uint64_t) || length == 16);
 }
 
+PLIST_API void plist_get_int_val(plist_t node, int64_t * val)
+{
+    plist_get_uint_val(node, (uint64_t*)val);
+}
+
 PLIST_API void plist_get_uid_val(plist_t node, uint64_t * val)
 {
     if (!node || !val)
@@ -1116,7 +1130,7 @@ int plist_data_compare(const void *a, const void *b)
     switch (val_a->type)
     {
     case PLIST_BOOLEAN:
-    case PLIST_UINT:
+    case PLIST_INT:
     case PLIST_REAL:
     case PLIST_DATE:
     case PLIST_UID:
@@ -1180,7 +1194,7 @@ static void plist_set_element_val(plist_t node, plist_type type, const void *val
     case PLIST_BOOLEAN:
         data->boolval = *((char *) value);
         break;
-    case PLIST_UINT:
+    case PLIST_INT:
     case PLIST_UID:
         data->intval = *((uint64_t *) value);
         break;
@@ -1225,7 +1239,12 @@ PLIST_API void plist_set_bool_val(plist_t node, uint8_t val)
 
 PLIST_API void plist_set_uint_val(plist_t node, uint64_t val)
 {
-    plist_set_element_val(node, PLIST_UINT, &val, sizeof(uint64_t));
+    plist_set_element_val(node, PLIST_INT, &val, (val > INT64_MAX) ? sizeof(uint64_t)*2 : sizeof(uint64_t));
+}
+
+PLIST_API void plist_set_int_val(plist_t node, int64_t val)
+{
+    plist_set_element_val(node, PLIST_INT, &val, sizeof(uint64_t));
 }
 
 PLIST_API void plist_set_uid_val(plist_t node, uint64_t val)
@@ -1259,9 +1278,42 @@ PLIST_API int plist_bool_val_is_true(plist_t boolnode)
     return (bv == 1);
 }
 
+PLIST_API int plist_int_val_is_negative(plist_t intnode)
+{
+    if (!PLIST_IS_INT(intnode)) {
+        return 0;
+    }
+    plist_data_t data = plist_get_data(intnode);
+    if (data->length == 16) {
+        return 0;
+    }
+    if ((int64_t)data->intval < 0) {
+        return 1;
+    }
+    return 0;
+}
+
+PLIST_API int plist_int_val_compare(plist_t uintnode, int64_t cmpval)
+{
+    if (!PLIST_IS_INT(uintnode)) {
+        return -1;
+    }
+    int64_t uintval = 0;
+    plist_get_int_val(uintnode, &uintval);
+    if (uintval == cmpval) {
+        return 0;
+    }
+
+    if (uintval < cmpval) {
+        return -1;
+    }
+
+    return 1;
+}
+
 PLIST_API int plist_uint_val_compare(plist_t uintnode, uint64_t cmpval)
 {
-    if (!PLIST_IS_UINT(uintnode)) {
+    if (!PLIST_IS_INT(uintnode)) {
         return -1;
     }
     uint64_t uintval = 0;
diff --git a/src/xplist.c b/src/xplist.c
index d8f6458..cf5d818 100644
--- a/src/xplist.c
+++ b/src/xplist.c
@@ -162,7 +162,7 @@ static int node_to_xml(node_t* node, bytearray_t **outbuf, uint32_t depth)
     }
     break;
 
-    case PLIST_UINT:
+    case PLIST_INT:
         tag = XPLIST_INT;
         tag_len = XPLIST_INT_LEN;
         val = (char*)malloc(64);
@@ -479,7 +479,7 @@ static int node_estimate_size(node_t *node, uint64_t *size, uint32_t depth)
             *size += data->length;
             *size += (XPLIST_KEY_LEN << 1) + 6;
             break;
-        case PLIST_UINT:
+        case PLIST_INT:
             if (data->length == 16) {
                 *size += num_digits_u(data->intval);
             } else {
@@ -1194,7 +1194,7 @@ static int node_from_xml(parse_ctx ctx, plist_t *plist)
                     data->intval = 0;
                     data->length = 8;
                 }
-                data->type = PLIST_UINT;
+                data->type = PLIST_INT;
             } else if (!strcmp(tag, XPLIST_REAL)) {
                 if (!is_empty) {
                     text_part_t first_part = { NULL, 0, 0, NULL };