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Small code/style changes in math module

This commit is contained in:
Nukem 2015-03-28 15:03:58 -04:00
parent bf91af33e7
commit b56a1d4b91
3 changed files with 124 additions and 140 deletions
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4
x64_dbg_dbg/_global.cpp
View File

@ -97,9 +97,7 @@ bool arraycontains(const char* cmd_list, const char* cmd)
bool scmp(const char* a, const char* b)
{
if(_stricmp(a, b))
return false;
return true;
return _stricmp(a, b) == 0;
}
void formathex(char* string)

4
x64_dbg_dbg/dynamicmem.h
View File

@ -4,6 +4,10 @@ template<typename T>
class Memory
{
public:
//
// This class guarantees that the returned allocated memory
// will always be zeroed
//
Memory(const char* Reason = "Memory:???")
{
m_Ptr = nullptr;

256
x64_dbg_dbg/math.cpp
View File

@ -25,7 +25,8 @@ struct EXPRESSION
/*
operator precedence
1 ( )
0 (INVALID/NONE)
1 ( ) (PARENTHESIS)
2 ~ (NOT)
3 * / % (MUL DIV)
4 + - (ADD SUB)
@ -34,18 +35,21 @@ operator precedence
7 ^ (XOR)
8 | (OR)
*/
int mathisoperator(char ch)
{
if(ch == '(' or ch == ')')
//
// The lower the number, the higher the priority.
// Zero indicates no operator was found.
//
if(ch == '(' || ch == ')')
return 1;
else if(ch == '~')
return 2;
else if(ch == '*' or ch == '`' or ch == '/' or ch == '%')
else if(ch == '*' || ch == '`' || ch == '/' || ch == '%')
return 3;
else if(ch == '+' or ch == '-')
else if(ch == '+' || ch == '-')
return 4;
else if(ch == '<' or ch == '>')
else if(ch == '<' || ch == '>')
return 5;
else if(ch == '&')
return 6;
@ -53,6 +57,7 @@ int mathisoperator(char ch)
return 7;
else if(ch == '|')
return 8;
return 0;
}
@ -64,10 +69,13 @@ void mathformat(char* text)
{
int len = (int)strlen(text);
Memory<char*> temp(len + 1, "mathformat:temp");
memset(temp, 0, len + 1);
for(int i = 0, j = 0; i < len; i++)
if(mathisoperator(text[i]) < 3 or text[i] != text[i + 1])
j += sprintf(temp + j, "%c", text[i]);
for (int i = 0, j = 0; i < len; i++)
{
if (mathisoperator(text[i]) < 3 || text[i] != text[i + 1])
j += sprintf(temp + j, "%c", text[i]);
}
strcpy(text, temp);
}
@ -76,12 +84,17 @@ void mathformat(char* text)
*/
bool mathcontains(const char* text)
{
if(*text == '-') //ignore negative values
// Skip negative values
if(*text == '-')
text++;
int len = (int)strlen(text);
for(int i = 0; i < len; i++)
if(mathisoperator(text[i]))
return true;
// Search the entire string looking for a math operator
for (; text[0] != '\0'; text++)
{
if (mathisoperator(text[0]))
return true;
}
return false;
}
@ -122,125 +135,86 @@ inline int mulhi(int x, int y)
}
#endif //__MINGW64__
template<typename T>
bool MathDoOperation(char op, T left, T right, T* result)
{
switch (op)
{
case '*':
*result = left * right;
return true;
case '`':
*result = umulhi(left, right);
return true;
case '/':
if (right)
{
*result = left / right;
return true;
}
return false;
case '%':
if (right)
{
*result = left % right;
return true;
}
return false;
case '+':
*result = left + right;
return true;
case '-':
*result = left - right;
return true;
case '<':
*result = left << right;
return true;
case '>':
*result = left >> right;
return true;
case '&':
*result = left & right;
return true;
case '^':
*result = left ^ right;
return true;
case '|':
*result = left | right;
return true;
}
return false;
}
bool mathdounsignedoperation(char op, uint left, uint right, uint* result)
{
switch(op)
{
case '*':
*result = left * right;
return true;
case '`':
*result = umulhi(left, right);
return true;
case '/':
if(right)
{
*result = left / right;
return true;
}
return false;
case '%':
if(right)
{
*result = left % right;
return true;
}
return false;
case '+':
*result = left + right;
return true;
case '-':
*result = left - right;
return true;
case '<':
*result = left << right;
return true;
case '>':
*result = left >> right;
return true;
case '&':
*result = left & right;
return true;
case '^':
*result = left ^ right;
return true;
case '|':
*result = left | right;
return true;
}
return false;
return MathDoOperation<uint>(op, left, right, result);
}
bool mathdosignedoperation(char op, sint left, sint right, sint* result)
{
switch(op)
{
case '*':
*result = left * right;
return true;
case '`':
*result = mulhi(left, right);
return true;
case '/':
if(right)
{
*result = left / right;
return true;
}
return false;
case '%':
if(right)
{
*result = left % right;
return true;
}
return false;
case '+':
*result = left + right;
return true;
case '-':
*result = left - right;
return true;
case '<':
*result = left << right;
return true;
case '>':
*result = left >> right;
return true;
case '&':
*result = left & right;
return true;
case '^':
*result = left ^ right;
return true;
case '|':
*result = left | right;
return true;
}
return false;
return MathDoOperation<sint>(op, left, right, result);
}
void fillpair(EXPRESSION* expstruct, int pos, int layer)
{
for(int i = 0; i < expstruct->total_pairs; i++)
{
if(!expstruct->pairs[i].isset)
if(expstruct->pairs[i].isset == BRACKET_FREE)
{
expstruct->pairs[i].layer = layer;
expstruct->pairs[i].openpos = pos;
expstruct->pairs[i].isset = BRACKET_OPEN;
expstruct->pairs[i].layer = layer;
expstruct->pairs[i].openpos = pos;
expstruct->pairs[i].isset = BRACKET_OPEN;
break;
}
else if(expstruct->pairs[i].layer == layer and expstruct->pairs[i].isset == 1)
else if(expstruct->pairs[i].layer == layer && expstruct->pairs[i].isset == BRACKET_OPEN)
{
expstruct->pairs[i].closepos = pos;
expstruct->pairs[i].isset = BRACKET_CLOSE;
expstruct->pairs[i].closepos = pos;
expstruct->pairs[i].isset = BRACKET_CLOSE;
break;
}
}
}
int matchpairs(EXPRESSION* expstruct, char* expression, int endlayer)
{
int layer = endlayer;
@ -298,6 +272,7 @@ void adjustpairs(EXPRESSION* exps, int cur_open, int cur_close, int cur_len, int
{
if(exps->pairs[i].openpos > cur_open)
exps->pairs[i].openpos += new_len - cur_len;
if(exps->pairs[i].closepos > cur_close)
exps->pairs[i].closepos += new_len - cur_len;
}
@ -309,18 +284,18 @@ bool printlayer(char* exp, EXPRESSION* exps, int layer, bool silent, bool baseon
{
if(exps->pairs[i].layer == layer)
{
char temp[256] = "";
char backup[256] = "";
int open = exps->pairs[i].openpos;
int close = exps->pairs[i].closepos;
int len = close - open;
int open = exps->pairs[i].openpos;
int close = exps->pairs[i].closepos;
int len = close - open;
char temp[256];
strncpy(temp, exp + open + 1, len - 1);
char backup[256];
strcpy_s(backup, exp + open + len + 1);
uint value;
if(!mathfromstring(temp, &value, silent, baseonly, 0, 0))
if(!mathfromstring(temp, &value, silent, baseonly, nullptr, nullptr))
return false;
adjustpairs(exps, open, close, len + 1, sprintf(exp + open, "%"fext"X", value));
@ -330,32 +305,41 @@ bool printlayer(char* exp, EXPRESSION* exps, int layer, bool silent, bool baseon
}
}
return true;
}
bool mathhandlebrackets(char* expression, bool silent, bool baseonly)
{
EXPRESSION expstruct;
expstruct.expression = expression;
int total_pairs = expressionformat(expression);
if(total_pairs == -1)
int totalPairs = expressionformat(expression);
if(totalPairs == -1)
return false;
else if(!total_pairs)
else if(!totalPairs)
return true;
expstruct.total_pairs = total_pairs;
Memory<BRACKET_PAIR*> pairs(expstruct.total_pairs * sizeof(BRACKET_PAIR), "mathhandlebrackets:expstruct.pairs");
expstruct.pairs = pairs;
memset(expstruct.pairs, 0, expstruct.total_pairs * sizeof(BRACKET_PAIR));
matchpairs(&expstruct, expression, 0);
Memory<BRACKET_PAIR*> pairs(totalPairs * sizeof(BRACKET_PAIR), "mathhandlebrackets:pairs");
EXPRESSION expStruct;
expStruct.expression = expression;
expStruct.total_pairs = totalPairs;
expStruct.pairs = pairs;
matchpairs(&expStruct, expression, 0);
int deepest = 0;
for(int i = 0; i < expstruct.total_pairs; i++)
if(expstruct.pairs[i].layer > deepest)
deepest = expstruct.pairs[i].layer;
for (int i = 0; i < expStruct.total_pairs; i++)
{
if (expStruct.pairs[i].layer > deepest)
deepest = expStruct.pairs[i].layer;
}
for (int i = deepest; i > 0; i--)
{
if (!printlayer(expression, &expStruct, i, silent, baseonly))
return false;
}
for(int i = deepest; i > 0; i--)
if(!printlayer(expression, &expstruct, i, silent, baseonly))
return false;
return true;
}
@ -386,8 +370,6 @@ bool mathfromstring(const char* string, uint* value, bool silent, bool baseonly,
return valfromstring(string, value, silent, baseonly, value_size, isvar, 0);
Memory<char*> strleft(len + 1 + negative, "mathfromstring:strleft");
Memory<char*> strright(len + 1, "mathfromstring:strright");
memset(strleft, 0, len + 1);
memset(strright, 0, len + 1);
strncpy(strleft, string - negative, highestop_pos + negative);
strcpy(strright, string + highestop_pos + 1);
strcpy(strleft, StringUtils::Trim(strleft).c_str());