programming-from-the-ground-up

Programming examples from the book "Programming from the Ground Up" by Josh Bartlett.

3. Your First Programs

• exit.s -- a simple assembly program that just exits and returns a status code back to the Linux kernel.
• maximum.s -- a program that finds the maximum number of a set of numbers.

4. All About Functions

• power.s -- a program that illustrates how functions work by solving $2^3 + 5^2$.
• factorial.s -- a program that calculates factorial using a recursive function.

5. Dealing with Files

• toupper.s -- a program that converts an input file to an output file with all letters converted to uppercase.

6. Reading and Writing Simple Records

• record-def.s -- record definitions.
• linux.s -- common Linux definitions.
• read-record.s -- a function that reads a record from the file descriptor.
• write-record.s -- a function that writes a record to the file descriptor.
• write-records.s -- a program that writes some sample records to the file.
• count-chars.s -- a function that counts the characters in the string until a null byte is reached.
• write-newline.s -- a function that writes a newline to the file descriptor.
• read-records.s -- a program that reads records from the file.
• add-year.s -- a program that reads records from the input file, increments the age of each record and writes them to the output file.

7. Developing Robust Programs

• error-exit.s -- a function that writes the error message to the standard error output and exits.
• add-year.s -- a program that reads records from the input file, increments the age of each record and writes them to the output file.

8. Sharing Functions with Code Libraries

• helloworld-nolib.s -- a program that writes the message "hello world" and exits.
• helloworld-lib.s -- a program that writes the message "hello world" and exits using the standard C library.
• printf-example.s -- a program that demonstrates the use of the printf function.
• write-record.s, read-record.s -- functions that write and read records, which are used to create a shared library for working with records.
• write-records.s -- a program that writes some sample records to the file and uses the shared library for working with records.

Notes:

• On x86-64 Linux in order to be able to link 32-bit programs with the c library install the libc6-dev-i386 package:

  $ sudo apt install libc6-dev-i386
  

• In order to run the write-records.exe program, execute the following command:

  $ LD_LIBRARY_PATH=. ./write-records.exe
  

9. Intermediate Memory Topics

• alloc.s -- a simple memory manager.
• read-records.s -- a program that reads records from the file and uses a simple memory manager to allocate memory.

10. Counting Like a Computer

• integer-to-string.s -- a function that converts an integer number to a ecimal string representation.
• conversion-program.s -- a program that converts an integer number to a decimal string representation and prints it.

11. High-Level Languages

• hello-world.c -- hello world program in C.
• hello-world.pl -- hello world program in Perl.
• hello-world.py -- hello world program in Python.