PString Assembly Project:

1. Introduction
2. run_main.s
3. Dependencies
4. Installation

Introduction

An exercise in computer structure course, we were given a task to implement pstring.s with several methods like the string.h, as -

char pstrlen(pstring* pstr) // get the length of pstring

pstring* replaceChar(pstring* pstr, char oldChar, char newChar) // replace all the oldChar instance with newChar in pstr

pstring* pstrijcpy(pstring* dst, pstring* src, char i, char j) // copy src[i:j] to dst[i:j]

pstring* swapCase(pstring* pstr) // replace all chars (a-z or A-Z) cases from lower-case to upper-case and the opposite

int pstrijcmp(pstring* pstr1, pstring* pstr2, char i, char j) // compare between src[i:j] to dst[i:j]

run_main.s

Getting an int from the user - the length of the first pstring (n), then getting n chars for the first pstirng. Then doing the same procces for the second pstring. Getting a number from the user (50, 52-55 or 60) and run one of the functions above using a switch case statement.

The switch-case options:

50 or 60:

Calculate and print the two pstring length

52:

Getting from the user two chars, oldChar and newChar. Then replace all the instance of the oldChar to the newChar (in the two pstrings).

53:

Getting from the user two integers, i and j. Than call the pstrijcpy function with src as the second pstring and dst as the first. Then prints the two pstrings.

54:

Using the swapCase function to swap every upper-case to lower-case in the two pstring.

55:

Getting from the user two integers, i and j. Than call the pstrijcmp function with pstr1 as the first pstring and pstr2 as the second. Then prints the compare result.

Dependencies

• macOS / Linux
• x86-64

Installation

1. Clone the repository:

   $ git clone https://github.com/tomershay100/PString.git
   

2. run this commands:

   $ make
   $ ./a.out