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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "arg.h"
#include "util.h"
#define LAT_USAGE "usage: lat [-cntbVh] [file...]"
void help(void) {
printf("lat | lazy cat - a cat clone with some quality-of-life "
"embelishments\n\n");
printf("%s\n\n", LAT_USAGE);
printf("options:\n"
"\t-c, --color\t toggle whether to print color or not\n"
"\t-n, --lines\t toggle whether to print line numbers or not\n"
"\t-t, --headers\t toggle whether to print file headers or not\n"
"\t-b, --binary\t toggle whether to force the data to be treated as "
"binary or not. see examples\n"
"\t-p, --pager\t print file a pager (less)\n"
"\t-V, --version\t show program version\n"
"\t-h, --help\t display this help text (--help shows additional info)\n\n");
printf("environment:\n"
"\tNO_COLOR, see https://no-color.org/\n\n");
}
void examples(void) {
printf(
"examples:\n"
"\tlat file1\n\t\t print the content of file1 witht default formatting\n"
"\tlat - file1\n\t\t read from stdin (the '-' character reads from "
"stdin) "
"and then print the contents of stdin and file1\n"
"\tlat -nc file1 file2\n\t\t print the contents of file1 and "
"file2 "
"without printing line numbers or colors\n"
"\tlat --binary file.txt\n\t\t force file.txt to be treated as a binary "
"file\n"
"\tlat -bb --pager file.txt\n\t\t force file.txt to NOT be treated "
"as a binary file and print it in the pager\n"
"\tcurl example.com | lat\n\t\t pipe the results of 'curl example.com' "
"into lat\n");
}
void version(void) {
printf("lat - v%s built %s at %s\n", LAT_VERSION, __DATE__, __TIME__);
}
struct config conf;
void argerr(char *r, char *arg) {
printf("lat: %s '%s'\n\n", r, arg);
printf("%s\n", LAT_USAGE);
printf("run '--help' for more information\n");
exit(EXIT_FAILURE);
}
void parselongarg(char *arg) {
if (strcmp(arg, "--color") == 0) {
conf.color = !conf.color;
return;
}
if (strcmp(arg, "--lines") == 0) {
conf.lines = !conf.lines;
return;
}
if (strcmp(arg, "--headers") == 0) {
conf.headers = !conf.headers;
return;
}
if (strcmp(arg, "--binary") == 0) {
if (conf.force_binary < 0)
conf.force_binary = 1;
else
conf.force_binary = !conf.force_binary;
return;
}
if (strcmp(arg, "--pager") == 0) {
conf.pager = !conf.pager;
}
if (strcmp(arg, "--help") == 0) {
help();
examples();
exit(EXIT_SUCCESS);
return;
}
if (strcmp(arg, "--version") == 0) {
version();
exit(EXIT_SUCCESS);
return;
}
argerr("unrecognized arg", arg);
}
void parseshortarg(char *arg) {
size_t i = 1;
while (arg[i] != '\0') {
char c = arg[i];
switch (c) {
case 'c':
conf.color = !conf.color;
break;
case 'n':
conf.lines = !conf.lines;
break;
case 't':
conf.headers = !conf.headers;
break;
case 'b':
if (conf.force_binary < 0)
conf.force_binary = 1;
else
conf.force_binary = !conf.force_binary;
break;
case 'p':
conf.pager = !conf.pager;
break;
case 'V':
version();
exit(EXIT_SUCCESS);
break;
case 'h':
help();
exit(EXIT_SUCCESS);
break;
default: {
char *str = malloc(2);
str[0] = c;
str[1] = '\0';
argerr("unrecognized flag", str);
free(str);
break;
}
}
i++;
}
}
int parseargs(int argc, char *argv[]) {
int i;
for (i = 1; i < argc; i++) { // offset for argv[0]
char *arg = argv[i];
if (arg[0] == '-' && arg[1] == '\0') {
return i;
}
if (arg[0] == '-') {
if (arg[1] == '-') {
parselongarg(arg);
continue;
}
parseshortarg(arg);
} else {
return i;
}
}
return i;
}
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