https://github.com/vihlancevk/printf

Implementation of the standard print function in assembly language (nasm)
https://github.com/vihlancevk/printf

Last synced: 10 days ago
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Implementation of the standard print function in assembly language (nasm)

• Host: GitHub
• URL: https://github.com/vihlancevk/printf
• Owner: vihlancevk
• Created: 2022-03-09T18:40:49.000Z (almost 3 years ago)
• Default Branch: master
• Last Pushed: 2022-03-15T13:43:38.000Z (almost 3 years ago)
• Last Synced: 2023-09-04T18:25:21.883Z (over 1 year ago)
• Language: Assembly
• Size: 32.2 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# printf

The function outputs a message with specifiers.  

## Entry:

- message with specifiers (required parameter):  

1) *%c* - outputs a character;  

2) *%s* - outputs a string;  

3) *%d* - outputs a decimal representation of a number;  

4) *%b* - outputs a binary representation of a number;  

5) *%o* - outputs an octal representation of a number;  

6) *%x* - outputs the hexadecimal representation of a number;  

7) *%%* - outputs a percentage.  

- other parameters that are optional  

## Note:

- parameters are passed through the stack from right to left  

- the program does not clear the stack of arguments after its completion  

- if the number of specifiers (except %) in the message is less than the number of optional parameters then the behavior of the function is undefined  

## Exit:

the results of the function are transmitted via the RAX register  

- RAX = the number of parameters recorded in the message  - the function ended without errors  

- RAX = -1 - the function ended with errors