azan

prayers time calculator written in nasm
git clone git://git.afify.dev/azan
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commit 168ed1a2e9279fe45a8976d6cca8e5d7ba7b80fa
parent 55c382f4b11b9ba091d32aa56cb8b4683c64f292
Author: afify <hassan@afify.dev>
Date:   Wed, 18 Nov 2020 18:05:31 +0300

[feat] handel command arg

- if argc > 2 die_usage
- if argc == 2 die_version
	if argv[1] == -v\0 print version
	else die_usage
- else continue

- create functions: die_usage and die_version
- set MAX_ARGC
- set die messages
- create DIE macro
- define VERSION

Diffstat:
Mazan-nasm.s | 18++++++++++++++++++
Mconfig.mk | 6++----
Mmacros.s | 55++++++++-----------------------------------------------
3 files changed, 28 insertions(+), 51 deletions(-)

diff --git a/azan-nasm.s b/azan-nasm.s @@ -52,6 +52,24 @@ section .text global _start _start: + pop rcx + cmp rcx, MAX_ARGC + jl get_timestamp + je die_version + +die_usage: + DIE usage_msg, usage_len + +die_version: + mov rcx, [rsp+8] ; argv + cmp [rcx], byte '-' + jne die_usage + cmp [rcx+1], byte 'v' + jne die_usage + cmp [rcx+2], byte 0 + jne die_usage + DIE version_msg, version_len + get_timestamp: mov rax, SYS_gettimeofday ;sys_gettimeofday( mov rdi, tstamp ;struct timeval *tv, diff --git a/config.mk b/config.mk @@ -1,16 +1,14 @@ # azan-nasm version VERSION = 0.1 -# Customize below to fit your system - # paths PREFIX = /usr/local MANPREFIX = ${PREFIX}/share/man # flags -AFLAGS = -f elf64 -w+all -D$$(uname) +AFLAGS = -f elf64 -w+all -D$$(uname) -DVERSION=\"${VERSION}\" LFLAGS = -m elf_x86_64 -s -no-pie -# compiler and linker +# assembler and linker ASM = nasm LNK = ld diff --git a/macros.s b/macros.s @@ -9,14 +9,13 @@ %define STDERR 2 %define ROUND_UP 10B ;toward +inf %define ROUND_DOWN 01B ;toward -inf +%define MAX_ARGC 2 section .rodata - failure_msg: db 0x5b, 0x1b, 0x5b, 0x33, 0x31, 0x6d, 0x46\ - 0x41, 0x49, 0x4c, 0x45, 0x44, 0x1b, 0x5b\ - 0x30, 0x6d, 0x5d, 0x20, 0x00 - failure_msglen: equ $ - failure_msg - julian_msg: db "Julian must be greader than offset.", 10, 0 - julian_msglen: equ $ - julian_msg + usage_msg: db "usage: azan-nasm [-v]", 10, 0 + usage_len: equ $ - usage_msg + version_msg: db "azan-nasm-", VERSION, 10, 0 + version_len: equ $ - version_msg %macro CHECK_OPENBSD 0 %ifdef OpenBSD @@ -33,53 +32,15 @@ section .note.openbsd.ident note syscall %endmacro -%macro FAIL_MSG 0 +%macro DIE 2 mov rax, SYS_write mov rdi, STDERR - mov rsi, failure_msg - mov rdx, failure_msglen - syscall -%endmacro - -%macro FAILJULIAN 0 - FAIL_MSG - mov rax, SYS_write - mov rdi, STDERR - mov rsi, julian_msg - mov rdx, julian_msglen + mov rsi, %1 + mov rdx, %2 syscall EEXIT EXIT_FAILURE %endmacro -; %macro ACOS 1; acos(x) = atan(sqrt((1-x*x)/(x*x))) -; fld qword %1 -; fld st0 -; fmul -; fld st0 -; fld1 -; fsubr -; fdivr -; fsqrt -; fld1 -; fpatan -; fstp qword %1 -; %endmacro - -; %macro ASIN 1 ;asin(x) = atan(sqrt(x*x/(1-x*x))) -; fld qword %1 -; fld st0 -; fmul -; fld st0 -; fld1 -; fsubr -; fdiv -; fsqrt -; fld1 -; fpatan -; fstp qword %1 -; %endmacro - - %macro ACOS 1; acos(x) = atan(sqrt((1-x*x)/(x*x))) fld qword %1 fld st0