Str.cpp
上传用户:oy0519
上传日期:2008-01-20
资源大小:124k
文件大小:7k
- #include <stdio.h>
- #include <assert.h>
- #include <math.h>
- #include <stdlib.h>
- #include "Str.h"
- CStr::CStr(const char* str)
- {
- if(str == 0)
- {
- m_nLength = 0;
- m_pString = 0;
- }
- else
- {
- m_nLength = strlen(str);
- m_pString = new char[m_nLength + 1];
- assert(m_pString != 0);
- strcpy(m_pString, str);
- }
- }
- CStr::CStr(const CStr& str)
- {
- if(str == 0)
- {
- m_nLength = 0;
- m_pString = 0;
- }
- else
- {
- m_nLength = str.m_nLength;
- m_pString = new char[m_nLength + 1];
- assert(m_pString != 0);
- strcpy(m_pString, str.m_pString);
- }
- }
- CStr& CStr::operator +=(const CStr& str)
- {
- m_nLength += str.m_nLength;
- char* pNew = new char[m_nLength + 1];
- assert(pNew != 0);
- strcpy(pNew, m_pString);
- strcat(pNew, str.m_pString);
- delete m_pString;
- m_pString = pNew;
- return *this;
- }
- CStr& CStr::operator =(const char* str)
- {
- if (m_pString) delete m_pString;
- m_nLength = strlen(str);
- m_pString = new char[m_nLength + 1];
- assert(m_pString != 0);
- strcpy(m_pString, str);
- return *this;
- }
- CStr& CStr::operator =(const CStr& str)
- {
- assert(str != 0);
- if (m_pString) delete m_pString;
- m_nLength = strlen(str.m_pString);
- m_pString = new char[m_nLength + 1];
- assert(m_pString != 0);
- strcpy(m_pString, str.m_pString);
- return *this;
- }
- void CStr::VarToString(const double var)
- {
- char str[32];
- gcvt(var, 16, str);
- m_nLength = strlen(str);
- if (str[m_nLength - 1] == '.')
- {
- str[m_nLength - 1] = ' ';
- m_nLength --;
- }
- m_nLength = strlen(str);
- m_pString = new char[m_nLength + 1];
- assert(m_pString != 0);
- strcpy(m_pString, str);
- }
- int CStr::Format(const char* format, ...)
- {
- assert(format != 0);
- int len;
- char* MaxBuf;
- for(int i = 5; ; i ++)
- {
- len = (int)pow(2, i);
- MaxBuf = new char[len];
- if (!MaxBuf) return 0;
- // some UNIX's do not support vsnprintf and snprintf
- len = _vsnprintf(MaxBuf, len, format, (char*)(&format + 1));
- if (len > 0) break;
- delete []MaxBuf;
- if (len == 0) return 0;
- }
- if (!m_pString)
- {
- m_nLength = len;
- m_pString = new char[m_nLength + 1];
- }
- else if (m_nLength < len)
- {
- delete m_pString;
- m_nLength = len;
- m_pString = new char[m_nLength + 1];
- }
- if (m_pString)
- strcpy(m_pString, MaxBuf);
- else
- len = 0;
- delete []MaxBuf;
- return len;
- }
- bool CStr::Match(char* Wildcards, char* str)
- {
- bool Yes = 1;
- //iterate and delete '?' and '*' one by one
- while(*Wildcards != ' ' && Yes && *str != ' ')
- {
- if (*Wildcards == '?') str ++;
- else if (*Wildcards == '*')
- {
- Yes = Scan(Wildcards, str);
- Wildcards --;
- }
- else
- {
- Yes = (*Wildcards == *str);
- str ++;
- }
- Wildcards ++;
- }
- while (*Wildcards == '*' && Yes) Wildcards ++;
- return Yes && *str == ' ' && *Wildcards == ' ';
- }
- // scan '?' and '*'
- bool CStr::Scan(char*& Wildcards, char*& str)
- {
- // remove the '?' and '*'
- for(Wildcards ++; *str != ' ' && (*Wildcards == '?' || *Wildcards == '*'); Wildcards ++)
- if (*Wildcards == '?') str ++;
- while ( *Wildcards == '*') Wildcards ++;
-
- // if str is empty and Wildcards has more characters or,
- // Wildcards is empty, return
- if (*str == ' ' && *Wildcards != ' ') return false;
- if (*str == ' ' && *Wildcards == ' ') return true;
- // else search substring
- else
- {
- char* wdsCopy = Wildcards;
- char* strCopy = str;
- bool Yes = 1;
- do
- {
- if (!Match(Wildcards, str)) strCopy ++;
- Wildcards = wdsCopy;
- str = strCopy;
- while ((*Wildcards != *str) && (*str != ' ')) str ++;
- wdsCopy = Wildcards;
- strCopy = str;
- }while ((*str != ' ') ? !Match(Wildcards, str) : (Yes = false) != false);
- if (*str == ' ' && *Wildcards == ' ') return true;
- return Yes;
- }
- }
- bool CStr::NumericParse(void* pvar, char flag)
- {
- assert(m_pString != 0);
- char* pTmpStr = m_pString;
- // remove the leading ' ' and 't' at the beginning
- while (*pTmpStr == ' ' || *pTmpStr == 't')
- pTmpStr++;
- // no desired character found
- if (strlen(pTmpStr) == 0)
- return false;
- char a = pTmpStr[0];
- if ((flag == 'b' || flag == 'C' || flag == 'S' ||
- flag == 'I' || flag == 'L') && a == '-')
- return false;
- if (flag == 'b')
- {
- bool var;
- if (strcmp(pTmpStr, "true") == 0 || strcmp(pTmpStr, "1") == 0 ||
- strcmp(pTmpStr, "TRUE") == 0) var = true;
- else if (strcmp(pTmpStr, "false") == 0 || strcmp(pTmpStr, "0") == 0 ||
- strcmp(pTmpStr, "FALSE") == 0) var = false;
- else // failed
- return false;
- memcpy(pvar, &var, sizeof(bool));
- return true;
- }
- else
- {
- double tmpvar = strtod(pTmpStr, (char**)&pTmpStr);
- if (tmpvar == 0.0 && a != '0')
- return false; // convertion wrong
- if (flag == 'f' || flag == 'd')
- {
- // allow any float value with one 'f' or 'F' terminated
- if (*pTmpStr == 'f' || *pTmpStr == 'F')
- pTmpStr++;
- }
- else if (flag == 'l' || flag == 'L')
- {
- // allow any float value with one 'l' or 'L terminated
- if (*pTmpStr == 'l' || *pTmpStr == 'L')
- pTmpStr++;
- }
- switch(flag)
- {
- case 'c':
- {
- //if (tmpvar < -(0xff / 2 + 1) || tmpvar > 0xff / 2)
- if (tmpvar < -128 || tmpvar > 127)
- return false; // onerflow
- char var = (char)tmpvar;
- memcpy(pvar, &var, sizeof(char));
- }
- break;
- case 's':
- {
- //if (tmpvar < -(0xffff / 2 + 1) || tmpvar > 0xffff / 2)
- if (tmpvar < -32768.0 || tmpvar > 32768.0)
- return false; // onerflow
- short var = (short)tmpvar;
- memcpy(pvar, &var, sizeof(short));
- }
- break;
- case 'i':
- {
- //if (tmpvar < -(0xffffffff / 2 + 1) || tmpvar > 0xffffffff / 2)
- if (tmpvar < -2147483648.0 || tmpvar > 2147483647.0)
- return false; // onerflow
- int var = (int)tmpvar;
- memcpy(pvar, &var, sizeof(int));
- }
- break;
- case 'l':
- {
- //if (tmpvar < -(0xffffffff / 2 + 1) || tmpvar > 0xffffffff / 2)
- if (tmpvar < -2147483648.0 || tmpvar > 2147483647.0)
- return false; // onerflow
- long var = (long)tmpvar;
- memcpy(pvar, &var, sizeof(long));
- }
- break;
- case 'C':
- {
- //if (tmpvar < 0 || tmpvar > 0xff)
- if (tmpvar < 0.0 || tmpvar > 255)
- return false; // onerflow
- unsigned char var = (unsigned char)tmpvar;
- memcpy(pvar, &var, sizeof(unsigned char));
- }
- break;
- case 'S':
- {
- //if (tmpvar < 0 || tmpvar > 0xffff)
- if (tmpvar < 0.0 || tmpvar > 65535.0)
- return false; // onerflow
- unsigned short var = (unsigned short)tmpvar;
- memcpy(pvar, &var, sizeof(unsigned short));
- }
- break;
- case 'I':
- {
- //if (tmpvar < 0 || tmpvar > 0xffffffff)
- if (tmpvar < 0.0 || tmpvar > 4294967295.0)
- return false; // onerflow
- unsigned int var = (unsigned int)tmpvar;
- memcpy(pvar, &var, sizeof(unsigned int));
- }
- break;
- case 'L':
- {
- //if (tmpvar < 0 || tmpvar > 0xffffffff)
- if (tmpvar < 0.0 || tmpvar > 4294967295.0)
- return false; // onerflow
- unsigned long var = (unsigned long)tmpvar;
- memcpy(pvar, &var, sizeof(unsigned long));
- }
- break;
- case 'f':
- {
- if (tmpvar < -3.402823466e+38 || tmpvar > 3.402823466e+38)
- return false; // onerflow
- float var = (float)tmpvar;
- memcpy(pvar, &var, sizeof(float));
- }
- break;
- case 'd':
- memcpy(pvar, &tmpvar, sizeof(double));
- break;
- }
- // remove the leading ' ' and 't' at the end
- while (*pTmpStr == ' ' || *pTmpStr == 't')
- pTmpStr++;
- if (*pTmpStr != ' ')
- return false; // non digital character detected
- return true;
- }
- }