118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/* Copyright (C) 2016 Jeremiah Orians
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* This file is part of M2-Planet.
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*
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* M2-Planet is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* M2-Planet is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with M2-Planet. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include<stdlib.h>
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#include<stdio.h>
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char* int2str(int x, int base, int signed_p);
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int char2int(char c)
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{
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if((48 <= c) && (57>= c))
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{
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return (c - 48);
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}
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return 0;
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}
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void write_string(char* c, FILE* f)
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{
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while(0 != c[0])
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{
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fputc(c[0], f);
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c = c + 1;
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}
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}
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void sum_file(FILE* input, FILE* output)
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{
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int c = fgetc(input);
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int sum = 0;
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while(0 <= c)
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{
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sum = sum + char2int(c);
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c = fgetc(input);
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}
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write_string(int2str(sum, 10, 0), output);
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fputc(10, output);
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}
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int match(char* a, char* b);
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int main(int argc, char** argv)
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{
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FILE* in = stdin;
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FILE* out = stdout;
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int i = 1;
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while(i <= argc)
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{
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if(NULL == argv[i])
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{
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i = i + 1;
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}
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else if(match(argv[i], "-f"))
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{
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in = fopen(argv[i + 1], "r");
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if(NULL == in)
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{
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write_string("Unable to open for reading file: ", stderr);
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write_string(argv[i + 1], stderr);
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write_string("\x0A Aborting to avoid problems\x0A", stderr);
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exit(EXIT_FAILURE);
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}
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i = i + 2;
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}
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else if(match(argv[i], "-o"))
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{
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out = fopen(argv[i + 1], "w");
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if(NULL == out)
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{
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write_string("Unable to open for writing file: ", stderr);
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write_string(argv[i + 1], stderr);
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write_string("\x0A Aborting to avoid problems\x0A", stderr);
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exit(EXIT_FAILURE);
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}
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i = i + 2;
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}
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else if(match(argv[i], "--help"))
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{
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write_string(" -f input file\x0A -o output file\x0A --help for this message\x0A --version for file version\x0A", stdout);
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exit(EXIT_SUCCESS);
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}
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else if(match(argv[i], "--version"))
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{
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write_string("Basic test version 0.0.0.1a\x0A", stderr);
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exit(EXIT_SUCCESS);
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}
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else
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{
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write_string("UNKNOWN ARGUMENT\x0A", stdout);
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exit(EXIT_FAILURE);
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}
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}
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sum_file(in, out);
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if (in != stdin)
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{
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fclose(in);
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}
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if (out != stdout)
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{
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fclose(out);
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}
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return 0;
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}
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