C函数仿写 JAVA::String操作
模拟JAVA String 函数处理
HLUtil.h
/**
* Ext-C Java::String.
* replaceFirst Str1 string will replace the first occurrence of the string str2 into str3.
*/
static void replaceFirst(char *str1,char *str2,char *str3);
/**
* Ext-C Java::String.
* Will appear in all str2 str1 are replaced str3.
*/
static void replace(char *str1,char *str2,char *str3);
/**
* Ext-C Java::String.
* Src string interception, labeled start from the beginning to the end-1 (end front) of the string stored in dest (index starts at 0).
*/
static void substring(char *dest,char *src,int start,int end);
/**
* Ext-C Java::String.
* Return the src subscript index character.
*/
static char charAt(char *src,int index);
/**
* Ext-C Java::String.
* Return the position of the first occurrence of str2 (The following table index) in str1, there is no return -1.
*/
static int indexOf(char *str1,char *str2);
/**
* Ext-C Java::String.
* Location (subscript) returns the last occurrence of str1 str2, there is no return -1.
*/
static int lastIndexOf(char *str1,char *str2);
/**
* Ext-C Java::String.
* Remove the first non-blank character in front of the left str whitespace characters (spaces and horizontal tabs).
*/
static void ltrim(char *str);
/**
* Ext-C Java::String.
* Delete str last non-blank character behind all whitespace characters (spaces and horizontal tabs).
*/
static void rtrim(char *str);
/**
* Ext-C Java::String.
* Whitespace characters to delete str ends.
*/
static void trim(char *str);
HLUtil.cpp:
void HLUtil:: replaceFirst(char *str1,char *str2,char *str3)
{
int length = strlen(str1)+1;
if(length>1)
{
char *str4 =new char[length];
char *p;
strcpy(str4,str1);
if((p=strstr(str1,str2))!=NULL)
{
while(str1!=p&&str1!=NULL)
{
str1++;
}
str1[0]='\0';
strcat(str1,str3);
strcat(str1,strstr(str4,str2)+strlen(str2));
}
delete str4;
str4 = NULL;
}
}
void HLUtil:: replace(char *str1,char *str2,char *str3)
{
while(strstr(str1,str2)!=NULL)
{
replaceFirst(str1,str2,str3);
}
}
void HLUtil:: substring(char *dest,char *src,int start,int end)
{
int i=start;
if(start>strlen(src))return;
if(end>strlen(src))
end=strlen(src);
while(i { dest[i-start]=src[i]; i++; } dest[i-start]='\0'; return; } char HLUtil:: charAt(char *src,int index) { char *p=src; int i=0; if(index<0||index>strlen(src)) return 0; while(i return p[i]; } int HLUtil:: indexOf(char *str1,char *str2) { char *p=str1; int i=0; p=strstr(str1,str2); if(p==NULL) return -1; else{ while(str1!=p) { str1++; i++; } } return i; } int HLUtil:: lastIndexOf(char *str1,char *str2) { char *p=str1; int i=0,len=strlen(str2); p=strstr(str1,str2); if(p==NULL)return -1; while(p!=NULL) { for(;str1!=p;str1++)i++; p=p+len; p=strstr(p,str2); } return i; } void HLUtil:: ltrim(char *str) { int i=0,j,len=strlen(str); while(str[i]!='\0') { if(str[i]!=32&&str[i]!=9)break; i++; } if(i!=0) for(j=0;j<=len-i;j++) { str[j]=str[j+i]; } } void HLUtil:: rtrim(char *str) { char *p=str; int i=strlen(str)-1; while(i>=0) { if(p[i]!=32&&p[i]!=9)break; i--; } str[++i]='\0'; } void HLUtil:: trim(char *str) { ltrim(str); rtrim(str); }