Why is the strtok(char* str, const char* delimiters) function non-reentrant?
Why is the strtok(char* str, const char* delimiters) function non-reentrant?
Homework Answers
The strtok function maintains a internal static pointer to keep hold of the passed string. For example,if our string is "hello people !!", and we tokenize it by a separator " ", we use
char t*=strtok(string," ").
now, the string is searched,and as soon as first " " is found, it returns the token.
To continue searching,it then passes a null in place of string, as it already is keeping a static pointer to the string. This is why it is non-reentrant. As soon as a new pointer is passed to it, it forgets all the earlier string.
Add Answer to:
Why is the strtok(char* str, const char* delimiters) function
non-reentrant?
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A) Why is this code not reentrant? On what line would an
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your answer
B) How could you fix it so that it is reentrant? Please explain
your answer
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Write this function in c++.Use of string and <cstring>
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Gtest case to pass:
#include "q1.cpp"
#include <gtest/gtest.h>
//-------------------Q1_8-----------------
TEST(Question1_8, First) {
char t1[]="Hello World";
char res1[] = "Hello";
char res2[] = "World";
char** r= StrTok(t1,' ');
ASSERT_EQ(0, strcmp(r[0],res1) );
ASSERT_EQ(0, strcmp(r[1],res2) );
}
TEST(Question1_8, Second) {
char t1[]="Hello?World?OOP";
char res1[] = "Hello";
char res2[] = "World";
char res3[] = "OOP";
char**...
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Thanks!
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A) Why is this code not reentrant? On what line would an
interrupt haveto occur to cause the bug to manifest? Please explain
your answer
B) How could you fix it so that it is reentrant? Please explain
your answer
9. During a driver's interrupt handling routine, once the interrupt has been acknowledgedit is possible for another interrupt to occur that will invoke the same handler. Drivers that produce correct results in this scenario are called reentrant. Consider the following...
Write this function in c++.Use of string and <cstring>
is not allowed .You are required to use char* and implement the use
of ** in this question .
Gtest case to pass:
#include "q1.cpp"
#include <gtest/gtest.h>
//-------------------Q1_8-----------------
TEST(Question1_8, First) {
char t1[]="Hello World";
char res1[] = "Hello";
char res2[] = "World";
char** r= StrTok(t1,' ');
ASSERT_EQ(0, strcmp(r[0],res1) );
ASSERT_EQ(0, strcmp(r[1],res2) );
}
TEST(Question1_8, Second) {
char t1[]="Hello?World?OOP";
char res1[] = "Hello";
char res2[] = "World";
char res3[] = "OOP";
char**...
has to be in C++ for Xcode
10. Write a function void TrimString(char str[]); that takes a string such as ”This is a line ” and removes all spaces to produce a string ”Thisisaline”.
Please answer the following question ASAP.
Note write the function and write a separate test case for it.
Thanks!
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