Add fletcher16-gen developer util
1. I'm not convinced our fletcher16 implementation is proper 2. It is not in coreutils So we add some basic code to do that. This is also the first dev-util, so add some documentation to DEVEL.md.
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DEVEL.md
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DEVEL.md
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@ -49,6 +49,16 @@ Permissable folders:
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- `src`: the upstream unmodified source code. This may be either a submodule or
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nonexistant.
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Furthermore, there is a special top-level dir `dev-utils`. In here are
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appropriate utilities that are often useful for development and not generally
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included on normal systems, or are specific to live-bootstrap. Each program
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should be contained within its own directory and include:
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- source code
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- compilation script
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The directory m2-functions is used for M2-Planet functions (currently).
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## Conventions
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- **Patches:**
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@ -0,0 +1,8 @@
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# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
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#
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# SPDX-License-Identifier: MIT
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fletcher16.M1
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fletcher16-footer.M1
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fletcher16.hex2
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fletcher16-gen
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@ -0,0 +1,42 @@
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#!/bin/sh
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# SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
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#
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# SPDX-License-Identifier: GPL-3.0-or-later
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set -ex
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M2-Planet \
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--architecture x86 \
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-f ../m2-functions/in_set.c \
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-f ../m2-functions/file_print.c \
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-f ../m2-functions/numerate_number.c \
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-f ../m2-functions/string.c \
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-f ../../sysa/mescc-tools-seed/src/mescc-tools-seed/M2-Planet/test/common_x86/functions/file.c \
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-f ../../sysa/mescc-tools-seed/src/mescc-tools-seed/M2-Planet/test/common_x86/functions/exit.c \
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-f ../m2-functions/require.c \
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-f ../../sysa/mescc-tools-seed/src/mescc-tools-seed/M2-Planet/test/common_x86/functions/malloc.c \
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-f ../../sysa/mescc-tools-seed/src/mescc-tools-seed/M2-Planet/functions/calloc.c \
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-f fletcher16-gen.c \
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-o fletcher16.M1 \
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--debug
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blood-elf -f fletcher16.M1 -o fletcher16-footer.M1
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M1 \
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-f ../../sysa/mescc-tools-seed/src/mescc-tools-seed/M2-Planet/test/common_x86/x86_defs.M1 \
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-f ../../sysa/mescc-tools-seed/src/mescc-tools-seed/M2-Planet/test/common_x86/libc-core.M1 \
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-f fletcher16.M1 \
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-f fletcher16-footer.M1 \
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--LittleEndian \
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--architecture x86 \
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-o fletcher16.hex2
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hex2 \
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-f ../../sysa/mescc-tools-seed/src/mescc-tools-seed/M2-Planet/test/common_x86/ELF-i386-debug.hex2 \
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-f fletcher16.hex2 \
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--LittleEndian \
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--architecture x86 \
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--BaseAddress 0x8048000 \
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-o fletcher16-gen \
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--exec_enable
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@ -0,0 +1,40 @@
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/*
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* SPDX-FileCopyrightText: 2021 fosslinux <fosslinux@aussies.space>
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#define BUF_SIZE 1024
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// CONSTANT BUF_SIZE 1024
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#define PATH_MAX 512
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// CONSTANT PATH_MAX 512
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int fletch16(FILE* fp)
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{
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long sum1 = 0;
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long sum2 = 0;
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int index;
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int c = fgetc(fp);
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while(c != EOF)
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{
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sum1 = (sum1 + c) % 255;
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sum2 = (sum2 + sum1) % 255;
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c = fgetc(fp);
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}
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return (sum2 << 8) | sum1;
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}
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int main(int argc, char** argv)
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{
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/* Open the file containing the checksums */
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FILE* fp = fopen(argv[1], "r");
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require(fp != NULL, prepend_string(
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prepend_string("Error opening checksum file ", argv[1]), "\n"));
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int csum = fletch16(fp);
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file_print(prepend_string(prepend_string(prepend_string(
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numerate_number(csum), " "), argv[1]), "\n"), stdout);
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}
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@ -0,0 +1,17 @@
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/*
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* SPDX-FileCopyrightText: 2016 Jeremiah Orians
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include<stdio.h>
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// void fputc(char s, FILE* f);
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void file_print(char* s, FILE* f)
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{
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while(0 != s[0])
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{
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fputc(s[0], f);
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s = s + 1;
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}
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}
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@ -0,0 +1,21 @@
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/*
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* SPDX-FileCopyrightText: 2016 Jeremiah Orians
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* SPDX-FileCopyrightText: 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#define FALSE 0
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// CONSTANT FALSE 0
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#define TRUE 1
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// CONSTANT TRUE 1
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int in_set(int c, char* s)
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{
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while(0 != s[0])
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{
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if(c == s[0]) return TRUE;
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s = s + 1;
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}
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return FALSE;
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}
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/*
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* SPDX-FileCopyrightText: 2016 Jeremiah Orians
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#define FALSE 0
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// CONSTANT FALSE 0
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#define TRUE 1
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// CONSTANT TRUE 1
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int match(char* a, char* b)
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{
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int i = -1;
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do
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{
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i = i + 1;
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if(a[i] != b[i])
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{
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return FALSE;
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}
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} while((0 != a[i]) && (0 !=b[i]));
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return TRUE;
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}
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@ -0,0 +1,159 @@
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/*
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* SPDX-FileCopyrightText: 2016 Jeremiah Orians
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include<stdlib.h>
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// void* calloc(int count, int size);
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#define TRUE 1
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//CONSTANT TRUE 1
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#define FALSE 0
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//CONSTANT FALSE 0
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int in_set(int c, char* s);
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//CONSTANT NULL 0
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char* numerate_number(int a)
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{
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char* result = calloc(16, sizeof(char));
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if(NULL == result) return NULL;
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int i = 0;
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/* Deal with Zero case */
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if(0 == a)
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{
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result[0] = '0';
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return result;
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}
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/* Deal with negatives */
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if(0 > a)
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{
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result[0] = '-';
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i = 1;
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a = a * -1;
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}
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/* Using the largest 10^n number possible in 32bits */
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int divisor = 0x3B9ACA00;
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/* Skip leading Zeros */
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while(0 == (a / divisor)) divisor = divisor / 10;
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/* Now simply collect numbers until divisor is gone */
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while(0 < divisor)
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{
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result[i] = ((a / divisor) + 48);
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a = a % divisor;
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divisor = divisor / 10;
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i = i + 1;
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}
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return result;
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}
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int char2hex(int c)
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{
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if (c >= '0' && c <= '9') return (c - 48);
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else if (c >= 'a' && c <= 'f') return (c - 87);
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else if (c >= 'A' && c <= 'F') return (c - 55);
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else return -1;
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}
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int hex2char(int c)
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{
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if((c >= 0) && (c <= 9)) return (c + 48);
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else if((c >= 10) && (c <= 15)) return (c + 55);
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else return -1;
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}
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int char2dec(int c)
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{
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if (c >= '0' && c <= '9') return (c - 48);
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else return -1;
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}
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int dec2char(int c)
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{
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if((c >= 0) && (c <= 9)) return (c + 48);
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else return -1;
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}
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int index_number(char* s, char c)
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{
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int i = 0;
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while(s[i] != c)
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{
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i = i + 1;
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if(0 == s[i]) return -1;
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}
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return i;
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}
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int toupper(int c)
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{
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if(in_set(c, "abcdefghijklmnopqrstuvwxyz")) return (c & 0xDF);
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return c;
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}
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int set_reader(char* set, int mult, char* input)
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{
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int n = 0;
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int i = 0;
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int hold;
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int negative_p = FALSE;
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if(input[0] == '-')
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{
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negative_p = TRUE;
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i = i + 1;
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}
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while(in_set(input[i], set))
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{
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n = n * mult;
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hold = index_number(set, toupper(input[i]));
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/* Input managed to change between in_set and index_number */
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if(-1 == hold) return 0;
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n = n + hold;
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i = i + 1;
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}
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/* loop exited before NULL and thus invalid input */
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if(0 != input[i]) return 0;
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if(negative_p)
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{
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n = 0 - n;
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}
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return n;
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}
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int numerate_string(char *a)
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{
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/* If NULL string */
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if(0 == a[0]) return 0;
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/* Deal with binary*/
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else if ('0' == a[0] && 'b' == a[1])
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{
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return set_reader("01", 2, a+2);
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}
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/* Deal with hex */
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else if ('0' == a[0] && 'x' == a[1])
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{
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return set_reader("0123456789ABCDEFabcdef", 16, a+2);
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}
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/* Deal with octal */
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else if('0' == a[0])
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{
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return set_reader("01234567", 8, a+1);
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}
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/* Deal with decimal */
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else
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{
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return set_reader("0123456789", 10, a);
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}
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}
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@ -0,0 +1,20 @@
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/*
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* SPDX-FileCopyrightText: 2016 Jeremiah Orians
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* SPDX-FileCopyrightText: 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include<stdio.h>
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#include<stdlib.h>
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void file_print(char* s, FILE* f);
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void require(int bool, char* error)
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{
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if(!bool)
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{
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file_print(error, stderr);
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exit(EXIT_FAILURE);
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}
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}
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@ -0,0 +1,59 @@
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/*
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* SPDX-FileCopyrightText: 2016 Jeremiah Orians
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include<stdlib.h>
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#include<stdio.h>
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#define MAX_STRING 4096
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//CONSTANT MAX_STRING 4096
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// void* calloc(int count, int size);
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void file_print(char* s, FILE* f);
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char* copy_string(char* target, char* source)
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{
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while(0 != source[0])
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{
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target[0] = source[0];
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target = target + 1;
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source = source + 1;
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}
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return target;
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}
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char* postpend_char(char* s, char a)
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{
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char* ret = calloc(MAX_STRING, sizeof(char));
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if(NULL == ret) return NULL;
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char* hold = copy_string(ret, s);
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hold[0] = a;
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return ret;
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}
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char* prepend_char(char a, char* s)
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{
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char* ret = calloc(MAX_STRING, sizeof(char));
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if(NULL == ret) return NULL;
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ret[0] = a;
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copy_string((ret+1), s);
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return ret;
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}
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char* prepend_string(char* add, char* base)
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{
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char* ret = calloc(MAX_STRING, sizeof(char));
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if(NULL == ret) return NULL;
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copy_string(copy_string(ret, add), base);
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return ret;
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}
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int string_length(char* a)
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{
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int i = 0;
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while(0 != a[i]) i = i + 1;
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return i;
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}
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