surfaces-unies/src/main.c

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C
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#include "utilities.h"
#include <getopt.h>
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#define NOERROR 0
#define ARGERROR 1
void help(int exit_code) {
puts("Usage:");
puts("surfaces-unies -i path [-o path] [-options]\n");
puts("The default action is to compress the mandatory input image to a .sf");
puts("file saved in the current directory.");
puts("The input image MUST be saved in the ppm format.");
puts("Options available:");
puts("-h --help\n\tdisplay the current message");
puts("-i --input\n\tpath to the input file (MANDATORY)");
puts("-o --output");
puts("\tpath to the output file (if the file already exists, it will be\n");
puts("-c --compress\n\tcompress the input file");
puts("-u --uncompress\n\tuncompresses the input file to the output file.");
exit(exit_code);
}
struct Argres {
char *input;
char *output;
bool compress;
};
typedef struct Argres Argres;
void get_args(Argres *args, int *c) {
switch (*c) {
case 0: break;
case 'h': help(NOERROR); break;
case 'i': (*args).input = optarg; break;
case 'o': (*args).output = optarg; break;
case 'c': (*args).compress = true; break;
case 'u': (*args).compress = false; break;
case '?':
default: help(ARGERROR);
}
}
Argres process_args(int t_argc, char *t_argv[]) {
Argres res;
res.input = NULL;
res.output = NULL;
while (true) {
int option_index = 0;
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'}, {"input", required_argument, NULL, 'i'},
{"output", required_argument, NULL, 'o'}, {"compress", no_argument, NULL, 'c'},
{"uncompress", no_argument, NULL, 'u'}, {NULL, 0, NULL, 0}};
int c = getopt_long(t_argc, t_argv, "hi:o:cu", long_options, &option_index);
if (c == -1) break;
get_args(&res, &c);
}
return res;
}
int main(int argc, char **argv) {
Argres argresults = process_args(argc, argv);
if (argresults.input) {
printf("input: %s\n", argresults.input);
} else {
fprintf(stderr, "ERROR: no input file.");
help(ARGERROR);
}
if (!argresults.output) {
argresults.output = "output.fs";
}
printf("output: %s\n", argresults.output);
printf("Compress? %s\n", (argresults.compress) ? "true" : "false");
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return 0;
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}