Another cool plug-in by brainsucker, a calculator :)

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@2920 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/Math/Source/MyMath.h

@@ -0,0 +1,164 @@
+#pragma once
+
+#define DEFAULT_ARRAY_SIZE  1024
+
+#define ITEMTYPE        0xFF0000
+// items classes
+#define IT_CONST        0x000000
+#define IT_EXPRESSION   0x010000
+#define IT_OPERATOR     0x020000
+#define IT_VARIABLE     0x030000
+#define IT_LOGIC        0x040000    // flow control items
+#define IT_FUNCTION     0x050000
+#define IT_ARRAY        0x060000    // array operation
+
+#define ITEMSUBTYPE 0x00FF00
+// const items
+#define ITC_STRING  0x000100
+#define ITC_FLOAT   0x000200
+#define ITC_INT     0x000400
+#define ITC_ARRAY   0x000800
+#define ITC_VARPTR  0x001000
+#define ITC_UNKNOWN 0x002000
+
+// type function
+#define FTT_FLOATF  (ITC_UNKNOWN << 0)
+#define FTT_LEN     (ITC_UNKNOWN << 1)
+#define FTT_CHAR    (ITC_UNKNOWN << 2)
+
+// additional option - for "ca" function
+#define ITFA_COPY   0x000001
+
+// ops items
+#define ITO_MINUS   0x000100
+#define ITO_PLUS    0x000200
+#define ITO_SHL     0x000300
+#define ITO_SHR     0x000400
+#define ITO_MUL     0x000500
+#define ITO_DIV     0x000600
+#define ITO_SET     0x000700
+#define ITO_LAND    0x000800
+#define ITO_LOR     0x000900
+#define ITO_INC     0x000A00
+#define ITO_DEC     0x000B00
+#define ITO_LE      0x000C00
+#define ITO_GE      0x000D00
+#define ITO_NE      0x000E00
+#define ITO_EQ      0x000F00
+#define ITO_LS      0x001000
+#define ITO_GR      0x001100
+#define ITO_AND     0x001200
+#define ITO_MOD     0x001300
+#define ITO_OR      0x001400
+#define ITO_XOR     0x001500
+#define ITO_NOT     0x001600
+#define ITO_LNOT    0x001700
+
+// variables sub-types
+#define ITV_NSIS    0x000100
+#define ITV_USER    0x000200
+#define ITV_ARRITEM 0x000400
+#define ITV_STACK   0x000800    // plugin specific stack
+#define ITV_NSTACK  0x001000    // nsis stack
+
+// logic sub-types
+#define ITL_IF      0x000100
+#define ITL_WHILE   0x000200
+
+// function sub-types
+#define ITF_MATH1   0x000100
+#define ITF_MATH2   0x000200
+#define ITF_TYPE    0x000300
+#define ITF_USER    0x000400
+
+// array items sub-types
+#define ITA_DEFINE  0x000100
+#define ITA_ACCESS  0x000200
+
+#define ITEMOPTIONS 0x0000FF
+
+// 16 bytes structure
+typedef struct __ExpressionItem ExpressionItem;
+typedef struct __ExpressionItem
+{
+    int type;
+    int param1;
+    int param2;
+    ExpressionItem *next;
+} ExpressionItem;
+
+typedef struct __ParseInfo
+{
+int SetupNewRoot;
+ExpressionItem *item;
+ExpressionItem *OpsStack;
+ExpressionItem* &place;
+ExpressionItem **root;
+char valbuf[108];
+} ParseInfo;
+
+typedef struct __OpStruct
+{
+    char name[4];
+    unsigned short int type;
+} OpStruct;
+
+#define MAX_USER_VARS   256
+typedef struct __UserVar
+{
+    char name[28];
+    ExpressionItem *item;
+} UserVar;
+
+#define MAX_USER_FUNCS  256
+typedef struct __UserFunc
+{
+    char name[20];
+    unsigned char vars[31];
+    unsigned char varsnum;
+    unsigned int varflags;
+    ExpressionItem *root;
+} UserFunc;
+
+typedef struct __ArrayDesc
+{
+    ExpressionItem **array;
+    int size;   // size of allocated items pool
+    int count;  // max number of item accessed
+    int references; // array will be killed at CleanupItems only when references == 0
+} ArrayDesc;
+
+typedef double (*Math1FuncPtr)(double arg);
+typedef double (*Math2FuncPtr)(double arg, double arg2);
+typedef double (*Math2iFuncPtr)(double arg, int *arg2);
+typedef double (*Math2dFuncPtr)(double arg, double *arg2);
+
+typedef struct __MathFunction
+{
+    char name[3];
+    unsigned char type;
+    Math1FuncPtr fptr;
+} MathFunction;
+
+#define STI_STRING   0x0100
+#define STI_FLOAT    0x0200
+#define STI_INT      0x0400
+
+#define FF_DEFAULT   0x00     // uses default mode: if available noexp, else exp
+#define FF_NOEXP     0x10     // uses noexp mode
+#define FF_EXP       0x20     // uses exp mode (small e)
+#define FF_LEXP      0x40     // uses exp mode (large E)
+
+// parsestring options
+#define PSO_STOPATDELIMETER 0x1
+
+// RunTree options
+#define RTO_NEEDCONST   0x0001
+#define RTO_PREFFEREDTYPE   0xFF00
+void RunTree(ExpressionItem *from, ExpressionItem* &result, int type);
+
+void StringToItem(char *&sbuf, ExpressionItem *item, int options);
+void ItemToString(char *sbuf, ExpressionItem *item);
+void FloatFormat(char *sbuf, double value, int options);
+void itoa64(__int64 i, char *buffer);
+int lstrcmpn(char *s1, const char *s2, int chars);