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authorpeter1138 <peter1138@openttd.org>2007-04-20 07:51:20 +0000
committerpeter1138 <peter1138@openttd.org>2007-04-20 07:51:20 +0000
commita8350e5fdf4e11599bfadfed80775aa6639b1322 (patch)
treecca0af6ff3bc97dae1130c9e7f8fd1ce62648d75
parent20f22f021c3e47f57377b5a76811d078ea42317e (diff)
downloadopenttd-a8350e5fdf4e11599bfadfed80775aa6639b1322.tar.xz
(svn r9682) -Codechange: Add support for saving/loading std::lists containing object references (REF_*)
-rw-r--r--src/saveload.cpp64
-rw-r--r--src/saveload.h5
2 files changed, 65 insertions, 4 deletions
diff --git a/src/saveload.cpp b/src/saveload.cpp
index 511eb7418..82c4152d6 100644
--- a/src/saveload.cpp
+++ b/src/saveload.cpp
@@ -27,6 +27,7 @@
#include "network/network.h"
#include "variables.h"
#include <setjmp.h>
+#include <list>
extern const uint16 SAVEGAME_VERSION = 56;
uint16 _sl_version; ///< the major savegame version identifier
@@ -627,6 +628,61 @@ void SlArray(void *array, uint length, VarType conv)
}
}
+
+static uint ReferenceToInt(const void* obj, SLRefType rt);
+static void* IntToReference(uint index, SLRefType rt);
+
+
+/**
+ * Return the size in bytes of a list
+ * @param list The std::list to find the size of
+ */
+static inline size_t SlCalcListLen(const void *list)
+{
+ std::list<void *> *l = (std::list<void *> *) list;
+
+ /* Each entry is saved as 2 bytes, plus 2 bytes are used for the length
+ * of the list */
+ return l->size() * 2 + 2;
+}
+
+
+/**
+ * Save/Load a list.
+ * @param list The list being manipulated
+ * @param conv SLRefType type of the list (Vehicle *, Station *, etc)
+ */
+void SlList(void *list, SLRefType conv)
+{
+ /* Automatically calculate the length? */
+ if (_sl.need_length != NL_NONE) {
+ SlSetLength(SlCalcListLen(list));
+ /* Determine length only? */
+ if (_sl.need_length == NL_CALCLENGTH) return;
+ }
+
+ std::list<void *> *l = (std::list<void *> *) list;
+
+ if (_sl.save) {
+ SlWriteUint16(l->size());
+
+ std::list<void *>::iterator iter;
+ for (iter = l->begin(); iter != l->end(); ++iter) {
+ void *ptr = *iter;
+ SlWriteUint16(ReferenceToInt(ptr, conv));
+ }
+ } else {
+ uint length = SlReadUint16();
+
+ /* Load each reference and push to the end of the list */
+ for (uint i = 0; i < length; i++) {
+ void *ptr = IntToReference(SlReadUint16(), conv);
+ l->push_back(ptr);
+ }
+ }
+}
+
+
/** Are we going to save this object or not? */
static inline bool SlIsObjectValidInSavegame(const SaveLoad *sld)
{
@@ -675,6 +731,7 @@ size_t SlCalcObjMemberLength(const void *object, const SaveLoad *sld)
case SL_REF:
case SL_ARR:
case SL_STR:
+ case SL_LST:
/* CONDITIONAL saveload types depend on the savegame version */
if (!SlIsObjectValidInSavegame(sld)) break;
@@ -683,6 +740,7 @@ size_t SlCalcObjMemberLength(const void *object, const SaveLoad *sld)
case SL_REF: return SlCalcRefLen();
case SL_ARR: return SlCalcArrayLen(sld->length, sld->conv);
case SL_STR: return SlCalcStringLen(GetVariableAddress(object, sld), sld->length, sld->conv);
+ case SL_LST: return SlCalcListLen(GetVariableAddress(object, sld));
default: NOT_REACHED();
}
break;
@@ -694,10 +752,6 @@ size_t SlCalcObjMemberLength(const void *object, const SaveLoad *sld)
}
-static uint ReferenceToInt(const void* obj, SLRefType rt);
-static void* IntToReference(uint index, SLRefType rt);
-
-
bool SlObjectMember(void *ptr, const SaveLoad *sld)
{
VarType conv = GB(sld->conv, 0, 8);
@@ -706,6 +760,7 @@ bool SlObjectMember(void *ptr, const SaveLoad *sld)
case SL_REF:
case SL_ARR:
case SL_STR:
+ case SL_LST:
/* CONDITIONAL saveload types depend on the savegame version */
if (!SlIsObjectValidInSavegame(sld)) return false;
if (SlSkipVariableOnLoad(sld)) return false;
@@ -722,6 +777,7 @@ bool SlObjectMember(void *ptr, const SaveLoad *sld)
break;
case SL_ARR: SlArray(ptr, sld->length, conv); break;
case SL_STR: SlString(ptr, sld->length, conv); break;
+ case SL_LST: SlList(ptr, (SLRefType)conv); break;
default: NOT_REACHED();
}
break;
diff --git a/src/saveload.h b/src/saveload.h
index 9148ab5a5..7589db5f2 100644
--- a/src/saveload.h
+++ b/src/saveload.h
@@ -159,6 +159,7 @@ enum SaveLoadTypes {
SL_REF = 1,
SL_ARR = 2,
SL_STR = 3,
+ SL_LST = 4,
// non-normal save-load types
SL_WRITEBYTE = 8,
SL_INCLUDE = 9,
@@ -190,11 +191,13 @@ typedef SaveLoad SaveLoadGlobVarList;
#define SLE_CONDREF(base, variable, type, from, to) SLE_GENERAL(SL_REF, base, variable, type, 0, from, to)
#define SLE_CONDARR(base, variable, type, length, from, to) SLE_GENERAL(SL_ARR, base, variable, type, length, from, to)
#define SLE_CONDSTR(base, variable, type, length, from, to) SLE_GENERAL(SL_STR, base, variable, type, length, from, to)
+#define SLE_CONDLST(base, variable, type, from, to) SLE_GENERAL(SL_LST, base, variable, type, 0, from, to)
#define SLE_VAR(base, variable, type) SLE_CONDVAR(base, variable, type, 0, SL_MAX_VERSION)
#define SLE_REF(base, variable, type) SLE_CONDREF(base, variable, type, 0, SL_MAX_VERSION)
#define SLE_ARR(base, variable, type, length) SLE_CONDARR(base, variable, type, length, 0, SL_MAX_VERSION)
#define SLE_STR(base, variable, type, length) SLE_CONDSTR(base, variable, type, length, 0, SL_MAX_VERSION)
+#define SLE_LST(base, variable, type) SLE_CONDLST(base, variable, type, 0, SL_MAX_VERSION)
#define SLE_CONDNULL(length, from, to) SLE_CONDARR(NullStruct, null, SLE_FILE_U8 | SLE_VAR_NULL | SLF_CONFIG_NO, length, from, to)
@@ -224,11 +227,13 @@ typedef SaveLoad SaveLoadGlobVarList;
#define SLEG_CONDREF(variable, type, from, to) SLEG_GENERAL(SL_REF, variable, type, 0, from, to)
#define SLEG_CONDARR(variable, type, length, from, to) SLEG_GENERAL(SL_ARR, variable, type, length, from, to)
#define SLEG_CONDSTR(variable, type, length, from, to) SLEG_GENERAL(SL_STR, variable, type, length, from, to)
+#define SLEG_CONDLST(variable, type, from, to) SLEG_GENERAL(SL_LST, variable, type, 0, from, to)
#define SLEG_VAR(variable, type) SLEG_CONDVAR(variable, type, 0, SL_MAX_VERSION)
#define SLEG_REF(variable, type) SLEG_CONDREF(variable, type, 0, SL_MAX_VERSION)
#define SLEG_ARR(variable, type) SLEG_CONDARR(variable, type, lengthof(variable), 0, SL_MAX_VERSION)
#define SLEG_STR(variable, type) SLEG_CONDSTR(variable, type, lengthof(variable), 0, SL_MAX_VERSION)
+#define SLEG_LST(variable, type) SLEG_CONDLST(variable, type, 0, SL_MAX_VERSION)
#define SLEG_CONDNULL(length, from, to) {SL_ARR, SLE_FILE_U8 | SLE_VAR_NULL | SLF_CONFIG_NO, length, from, to, (void*)NULL}