From 1e13f3671739e98f4e6d8531b9b22c93d24589f8 Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@beefcake.parabola.nu>
Date: Fri, 18 May 2018 12:51:36 -0400
Subject: pull strextentflags in to a function

---
 src/cow-extent-map.c | 87 +++-------------------------------------------------
 1 file changed, 4 insertions(+), 83 deletions(-)

(limited to 'src/cow-extent-map.c')

diff --git a/src/cow-extent-map.c b/src/cow-extent-map.c
index 1a791a0..aeedadf 100644
--- a/src/cow-extent-map.c
+++ b/src/cow-extent-map.c
@@ -5,10 +5,9 @@
 #include <fcntl.h>    /* for open(2) and O_RDONLY */
 #include <getopt.h>   /* for getopt_long(3gnu), struct option, optind, optarg */
 #include <inttypes.h> /* PRI* */
-#include <stdbool.h>  /* for bool, true, false */
-#include <stdio.h>    /* for printf(3p), fprintf(3p), sprintf(3p), stderr */
-#include <stdlib.h>   /* malloc(3p), freep(3p), exit(3p), EXIT_SUCCESS, EXIT_FAILURE */
-#include <string.h>   /* for strcmp(3p), strlen(3p), strcpy(3p) */
+#include <stdio.h>    /* for printf(3p), fprintf(3p), stderr */
+#include <stdlib.h>   /* free(3p), exit(3p), EXIT_SUCCESS, EXIT_FAILURE */
+#include <string.h>   /* for strcmp(3p) */
 
 #include "extent-map.h" /* for uint32_t, fiemap stuff */ 
 
@@ -19,86 +18,8 @@
 	exit(EXIT_INVALIDARGUMENT); \
 } while(0)
 
-struct flag {
-	char *name;
-	uint32_t value;
-	bool active;
-};
-
 int print_extent(struct fiemap_extent extent) {
-	struct flag known_flags[] = {
-		{"LAST", FIEMAP_EXTENT_LAST, false},
-		{"UNKNOWN", FIEMAP_EXTENT_UNKNOWN, false},
-		{"DELALLOC", FIEMAP_EXTENT_DELALLOC, false},
-		{"ENCODED", FIEMAP_EXTENT_ENCODED, false},
-		{"DATA_ENCRYPTED", FIEMAP_EXTENT_DATA_ENCRYPTED, false},
-		{"NOT_ALIGNED", FIEMAP_EXTENT_NOT_ALIGNED, false},
-		{"DATA_INLINE", FIEMAP_EXTENT_DATA_INLINE, false},
-		{"DATA_TAIL", FIEMAP_EXTENT_DATA_TAIL, false},
-		{"UNWRITTEN", FIEMAP_EXTENT_UNWRITTEN, false},
-		{"MERGED", FIEMAP_EXTENT_MERGED, false},
-		{"SHARED", FIEMAP_EXTENT_SHARED, false},
-	};
-	uint32_t flags = extent.fe_flags;
-	size_t flagstr_cap = 0;
-	for (size_t i = 0; i < sizeof(known_flags)/sizeof(known_flags[0]); i++) {
-		if (!(flags & known_flags[i].value))
-			continue;
-		known_flags[i].active = true;
-		flags ^= known_flags[i].value;
-		switch (known_flags[i].value) {
-		case FIEMAP_EXTENT_UNKNOWN:
-			if (flags & FIEMAP_EXTENT_DELALLOC) {
-				known_flags[i].name = "(UNKNOWN|DELALLOC)";
-				flags ^= FIEMAP_EXTENT_DELALLOC;
-			}
-			break;
-		case FIEMAP_EXTENT_ENCODED:
-			if (flags & FIEMAP_EXTENT_DATA_ENCRYPTED) {
-				known_flags[i].name = "(ENCODED|DATA_ENCRYPTED)";
-				flags ^= FIEMAP_EXTENT_DATA_ENCRYPTED;
-			}
-			break;
-		case FIEMAP_EXTENT_NOT_ALIGNED:
-			switch (flags & (FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL)) {
-			case FIEMAP_EXTENT_DATA_INLINE:
-				known_flags[i].name = "(NOT_ALIGNED|DATA_INLINE)";
-				flags ^= FIEMAP_EXTENT_DATA_INLINE;
-				break;
-			case FIEMAP_EXTENT_DATA_TAIL:
-				known_flags[i].name = "(NOT_ALIGNED|DATA_TAIL)";
-				flags ^= FIEMAP_EXTENT_DATA_TAIL;
-				break;
-			case FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL:
-				known_flags[i].name = "(NOT_ALIGNED|DATA_INLINE|DATA_TAIL)";
-				flags ^= FIEMAP_EXTENT_DATA_INLINE|FIEMAP_EXTENT_DATA_TAIL;
-				break;
-			}
-			break;
-		}
-		if (flagstr_cap)
-			flagstr_cap++;
-		flagstr_cap += strlen(known_flags[i].name);
-	}
-	if (flags)
-		flagstr_cap += (flagstr_cap ? 1 : 0) + 10;
-	char *flagstr = malloc(flagstr_cap+1);
-	if (!flagstr)
-		error(EXIT_FAILURE, errno, "malloc");
-	size_t flagstr_len = 0;
-	for (size_t i = 0; i < sizeof(known_flags)/sizeof(known_flags[0]); i++) {
-		if (!known_flags[i].active)
-			continue;
-		if (flagstr_len)
-			flagstr[flagstr_len++] = '|';
-		strcpy(&flagstr[flagstr_len], known_flags[i].name);
-		flagstr_len += strlen(known_flags[i].name);
-	}
-	if (flags) {
-		if (flagstr_len)
-			flagstr[flagstr_len++] = '|';
-		sprintf(&flagstr[flagstr_len], "0x%08"PRIx32, flags);
-	};
+	char *flagstr = strextentflags(extent.fe_flags);
 	printf("logical=%"PRIu64" "
 	       "physical=%"PRIu64" "
 	       "length=%"PRIu64" "
-- 
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