121 lines
2.3 KiB
C
121 lines
2.3 KiB
C
#include "arg.h"
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#include "util.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define LAT_USAGE "usage: lat [-cnbVh] [files..]"
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void help(void) {
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printf("%s\n", LAT_USAGE);
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printf("options:\n"
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"\t-c, --color\t toggle whether to print color or not\n"
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"\t-n, --lines\t toggle whether to print line numbers or not\n"
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"\t-b, --binary\t toggle whether to force the data to be treated as "
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"binary or not\n"
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"\t-V, --version\t show program version\n"
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"\t-h, --help\t display this help text\n");
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printf("");
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}
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void version(void) {
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printf("lat - v%s built %s at %s\n", LAT_VERSION, __DATE__, __TIME__);
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}
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struct config conf;
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void argerr(char *r, char *arg) {
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printf("lat: %s '%s'\n", r, arg);
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printf("%s\n", LAT_USAGE);
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exit(EXIT_FAILURE);
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}
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void parselongarg(char *arg) {
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if (strcmp(arg, "--color") == 0) {
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conf.color = !conf.color;
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return;
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}
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if (strcmp(arg, "--lines") == 0) {
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conf.lines = !conf.lines;
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return;
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}
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if (strcmp(arg, "--binary") == 0) {
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conf.force_binary = !conf.force_binary;
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return;
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}
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if (strcmp(arg, "--help") == 0) {
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help();
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exit(EXIT_SUCCESS);
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return;
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}
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if (strcmp(arg, "--version") == 0) {
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version();
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exit(EXIT_SUCCESS);
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return;
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}
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argerr("unrecognized arg", arg);
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}
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void parseshortarg(char *arg) {
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size_t i = 1;
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while (arg[i] != '\0') {
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char c = arg[i];
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switch (c) {
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case 'c':
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conf.color = !conf.color;
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break;
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case 'n':
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conf.lines = !conf.lines;
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break;
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case 'b':
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conf.force_binary = !conf.force_binary;
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break;
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case 'V':
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version();
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exit(EXIT_SUCCESS);
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break;
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case 'h':
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help();
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exit(EXIT_SUCCESS);
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break;
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default: {
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char *str = malloc(2);
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str[0] = c;
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str[1] = '\0';
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argerr("unrecognized flag", str);
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free(str);
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break;
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}
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}
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i++;
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}
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}
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int parseargs(int argc, char *argv[]) {
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int i;
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for (i = 1; i < argc; i++) { // offset for argv[0]
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char *arg = argv[i];
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if (arg[0] == '-' && arg[1] == '\0') {
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return i;
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}
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if (arg[0] == '-') {
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if (arg[1] == '-') {
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parselongarg(arg);
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continue;
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}
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parseshortarg(arg);
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} else {
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return i;
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}
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}
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return i;
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}
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