expand command line argument handling.

Signed-off-by: Gediminas Jakutis <gediminas@varciai.lt>

1 files changed, 19 insertions, 4 deletions

diff --git a/src/main.c b/src/main.c
index 2e1ffe1..aa3e4b7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -5,12 +5,16 @@
 #include <string.h>
 #include "io.h"
 
+static const unsigned int OPERATING_MODE = (1 << 0);
+static const unsigned int DATA_FORMAT =    (1 << 1);
+static const unsigned int DATA_ACCESS =    (1 << 2);
+
 static struct settings_s {
 	size_t fetchpos;
 	size_t fetchto;
 	char *filein;
 	char *fileout;
-	int mode;
+	unsigned int mode;
 } settings = {0};
 
 static struct stream file_in = {.fd = -1};
@@ -61,9 +65,17 @@ static int parseargs(int argc, char **argv, struct settings_s * settings)
 
 	for (i = 1; i < argc - 1; ++i) {
 		if (!(strcmp(argv[i], "--sort"))) {
-			s.mode &= ~1;
+			s.mode &= ~OPERATING_MODE;
 		} else if (!(strcmp(argv[i], "--fetch"))) {
-			s.mode |= 1;
+			s.mode |= OPERATING_MODE;
+		} else if (!(strcmp(argv[i], "--array"))) {
+			s.mode &= ~DATA_FORMAT;
+		} else if (!(strcmp(argv[i], "--list"))) {
+			s.mode |= DATA_FORMAT;
+		} else if (!(strcmp(argv[i], "--cache"))) {
+			s.mode &= ~DATA_ACCESS;
+		} else if (!(strcmp(argv[i], "--no-cache"))) {
+			s.mode |= DATA_ACCESS;
 		} else if (!(strncmp(argv[i], "--position=", 11))) {
 			if (strlen(argv[i]) > 11) {
 				s.fetchpos = strtoul(argv[i] + 11, NULL, 10);
@@ -118,7 +130,10 @@ void printhelp(const char * const name)
 		"\n"
 		"Options:\n"
 		" --sort              sort mode (default)\n"
-		" --fetch             fetch element\n"
+		" --fetch             do not sort, fetch element(s) instead\n"
+		" --array             use an array data format (default)\n"
+		" --list              use a linked list data format\n"
+		" --[no]-cache        cache data in memory (default) or process data in-place\n"
 		" --position=<num>    fetch element from position <num>\n"
 		" --num=<num>         <num> of elements to fetch\n"
 		" --out=<name>        write output to <name> file\n"