String Library

Custom string libary for C made from the JavaScript string methods

Compilation Instructions

To compile the project, use the following command:

gcc -Wall strlib.c strlib_test.c -o strlib_test

Running the tests

On unix-based systems, run the compiled program by using the following command:

./strlib_test

On Windows-based systems, run the compiled program by using the following command:

./strlib_test.exe

Method overview

Method	Status	Comment	Implemented
charAt()	Implementable	Returns the character at a specific index	✅
charCodeAt()	Implementable	Returns the ASCII code of the character	✅
concat()	Implementable	Concatenates two strings	✅
endsWith()	Implementable	Checks if the string ends with a substring	✅
includes()	Implementable	Checks if the string contains a substring	✅
indexOf()	Implementable	Finds the first occurrence of a substring	✅
lastIndexOf()	Implementable	Finds the last occurrence of a substring	✅
length	Implementable	Returns the length of the string (as function)	✅
startsWith()	Implementable	Checks if the string starts with a substring	✅
slice()	Implementable	Returns a portion of the string	✅
toLowerCase()	Implementable	Converts to lowercase	✅
toUpperCase()	Implementable	Converts to uppercase	✅
trim()	Implementable	Removes whitespace from both ends	✅
trimStart()	Implementable	Removes whitespace from the start	✅
trimEnd()	Implementable	Removes whitespace from the end	✅
repeat()	Implementable	Repeats the string count times	✅
substring()	Modification Needed	Similar to slice but does not support negative indices	✅
padStart()	Modification Needed	Pads the string to the target length from the start	✅
padEnd()	Modification Needed	Pads the string to the target length from the end	✅
replace()	Modification Needed	No regex, only static replacement	✅
split()	Modification Needed	Splits the string based on a separator, no regex	❌
localeCompare()	Modification Needed	No locale support, similar to strcmp	❌
match()	Not Implementable	Requires regex support	❌
matchAll()	Not Implementable	Requires regex support	❌
replaceAll()	Not Implementable	Requires regex or advanced manipulation	❌
search()	Not Implementable	Requires regex	❌
codePointAt()	Not Implementable	Requires Unicode support	✅
normalize()	Not Implementable	Requires Unicode normalization	❌
isWellFormed()	Not Implementable	Requires Unicode support	❌
toWellFormed()	Not Implementable	Requires Unicode support	❌
toLocaleLowerCase()	Not Implementable	Requires locale support	❌
toLocaleUpperCase()	Not Implementable	Requires locale support	❌
valueOf()	Not Implementable	Unnecessary in C	❌

Development Environment

• Machine: Intel-based MacBook Pro
• Operating System: macOS Sonoma (14.6.1)
• Compiler: gcc-14 (Homebrew GCC 14.2.0)