From ad1bc59382e3cda63ce507cd7f56fc2a201c11e9 Mon Sep 17 00:00:00 2001
From: Gediminas Jakutis <gediminas@varciai.lt>
Date: Tue, 25 Feb 2020 09:57:14 +0200
Subject: implement reading from dev-you-random for datagen.

Signed-off-by: Gediminas Jakutis <gediminas@varciai.lt>
---
 src/main.c | 42 +++++++++++++++---------------------------
 1 file changed, 15 insertions(+), 27 deletions(-)

(limited to 'src/main.c')

diff --git a/src/main.c b/src/main.c
index ee0ad52..ca3b600 100644
--- a/src/main.c
+++ b/src/main.c
@@ -5,30 +5,17 @@
 #include <string.h>
 #include "io.h"
 
-enum opmode {
-	mode_normal,
-	mode_fetch,
-	mode_generate
-};
-
 static const unsigned int FLAG_DATA_FORMAT = (1 << 0);
 static const unsigned int FLAG_DATA_ACCESS = (1 << 1);
 
 static char randfile[] = "/dev/urandom";
 
-static struct settings_s {
-	size_t ss;
-	size_t to;
-	char *filein;
-	char *fileout;
-	unsigned int flags;
-	enum opmode opmode;
-} settings = {0};
+static struct settings settings = {0};
 
-static struct stream file_in = {.last_idx = -1, .fd = -1};
-static struct stream file_out = {.last_idx = -1, .fd = -1, .out = 1};
+static struct stream file_in = {.prev_idx = -1, .fd = -1};
+static struct stream file_out = {.prev_idx = -1, .fd = -1, .out = 1};
 
-static int parseargs(int argc, char **argv, struct settings_s * settings);
+static int parseargs(int argc, char **argv, struct settings * settings);
 void printhelp(const char * const name);
 
 int main(int argc, char **argv)
@@ -42,21 +29,19 @@ int main(int argc, char **argv)
 	if (settings.opmode == mode_generate) {
 		file_in.name = randfile;
 		file_in.out = -1;
+		file_in.n = settings.to;
+		file_out.n = settings.to;
 	} else {
 		file_in.name = settings.filein;
 	}
 
 	file_out.name = settings.fileout ? settings.fileout : settings.filein;
-	file_in.stride = settings.opmode & FLAG_DATA_FORMAT ? sizeof(struct entry_l) : sizeof(struct entry_a);
 
-	if ((ret = stream_open(&file_in))) {
+	if ((ret = stream_open(&file_in, &settings))) {
 		goto out;
 	}
 
-	file_out.n = file_in.n;
-	file_out.stride = file_in.stride;
-
-	if ((ret = stream_open(&file_out))) {
+	if ((ret = stream_open(&file_out, &settings))) {
 		goto out;
 	}
 
@@ -66,9 +51,9 @@ out:
 	return ret;
 }
 
-static int parseargs(int argc, char **argv, struct settings_s * settings)
+static int parseargs(int argc, char **argv, struct settings * settings)
 {
-	struct settings_s s = {0};
+	struct settings s = {0};
 	ssize_t i;
 	int ret = 0;
 
@@ -124,13 +109,16 @@ static int parseargs(int argc, char **argv, struct settings_s * settings)
 		s.fileout = s.filein;
 	}
 
-	s.to = s.ss + s.to;
 
-	/* we always generate in-memory for speed */
 	if (s.opmode == mode_generate) {
+		/* we always generate in-memory for speed */
 		s.opmode &= ~FLAG_DATA_ACCESS;
+	} else if (s.opmode == mode_fetch) {
+		s.to = s.ss + s.to;
 	}
 
+	s.stride = s.opmode & FLAG_DATA_FORMAT ? sizeof(struct entry_l) : sizeof(struct entry);
+
 	*settings = s;
 
 	while (0) {
-- 
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