[PATCH 5/7] mkfs: convert subopt name,val pairs to enums and declared arrays

[Dave Chinner <david@fromorbit.com>]

From: Dave Chinner <dchinner@redhat.com>

Replace the nasty #define + implicit array index definitions with
pre-declared enums and index specific name array declarations.

This cleans up the code quite a bit and the pre-declaration of the
enums allows tables to use indexes from other tables in things like
conflict specifications.

Signed-Off-By: Dave Chinner <dchinner@redhat.com>
---
 mkfs/xfs_mkfs.c | 276 +++++++++++++++++++++++++++++++-------------------------
 1 file changed, 153 insertions(+), 123 deletions(-)

diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index 2272700807dc..4b79c03e442b 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -46,7 +46,102 @@
 unsigned int		blocksize;
 unsigned int		sectorsize;
 
-#define MAX_SUBOPTS	17
+/*
+ * Enums for each CLI parameter type are declared first so we can calculate the
+ * maximum array size needed to hold them automatically.
+ */
+enum {
+	B_LOG = 0,
+	B_SIZE,
+	B_MAX_OPTS,
+};
+
+enum {
+	D_AGCOUNT = 0,
+	D_FILE,
+	D_NAME,
+	D_SIZE,
+	D_SUNIT,
+	D_SWIDTH,
+	D_AGSIZE,
+	D_SU,
+	D_SW,
+	D_SECTLOG,
+	D_SECTSIZE,
+	D_NOALIGN,
+	D_RTINHERIT,
+	D_PROJINHERIT,
+	D_EXTSZINHERIT,
+	D_COWEXTSIZE,
+	D_MAX_OPTS,
+};
+
+enum {
+	I_ALIGN = 0,
+	I_LOG,
+	I_MAXPCT,
+	I_PERBLOCK,
+	I_SIZE,
+	I_ATTR,
+	I_PROJID32BIT,
+	I_SPINODES,
+	I_MAX_OPTS,
+};
+
+enum {
+	L_AGNUM = 0,
+	L_INTERNAL,
+	L_SIZE,
+	L_VERSION,
+	L_SUNIT,
+	L_SU,
+	L_DEV,
+	L_SECTLOG,
+	L_SECTSIZE,
+	L_FILE,
+	L_NAME,
+	L_LAZYSBCNTR,
+	L_MAX_OPTS,
+};
+
+enum {
+	N_LOG = 0,
+	N_SIZE,
+	N_VERSION,
+	N_FTYPE,
+	N_MAX_OPTS,
+};
+
+enum {
+	R_EXTSIZE = 0,
+	R_SIZE,
+	R_DEV,
+	R_FILE,
+	R_NAME,
+	R_NOALIGN,
+	R_MAX_OPTS,
+};
+
+enum {
+	S_LOG = 0,
+	S_SECTLOG,
+	S_SIZE,
+	S_SECTSIZE,
+	S_MAX_OPTS,
+};
+
+enum {
+	M_CRC = 0,
+	M_FINOBT,
+	M_UUID,
+	M_RMAPBT,
+	M_REFLINK,
+	M_MAX_OPTS,
+};
+
+/* Just define the max options array size manually right now */
+#define MAX_SUBOPTS	D_MAX_OPTS
+
 #define SUBOPT_NEEDS_VAL	(-1LL)
 #define MAX_CONFLICTS	8
 #define LAST_CONFLICT	(-1)
@@ -138,11 +233,8 @@ struct opt_params {
 struct opt_params bopts = {
 	.name = 'b',
 	.subopts = {
-#define	B_LOG		0
-		"log",
-#define	B_SIZE		1
-		"size",
-		NULL
+		[B_LOG] = "log",
+		[B_SIZE] = "size",
 	},
 	.subopt_params = {
 		{ .index = B_LOG,
@@ -167,39 +259,22 @@ struct opt_params bopts = {
 struct opt_params dopts = {
 	.name = 'd',
 	.subopts = {
-#define	D_AGCOUNT	0
-		"agcount",
-#define	D_FILE		1
-		"file",
-#define	D_NAME		2
-		"name",
-#define	D_SIZE		3
-		"size",
-#define D_SUNIT		4
-		"sunit",
-#define D_SWIDTH	5
-		"swidth",
-#define D_AGSIZE	6
-		"agsize",
-#define D_SU		7
-		"su",
-#define D_SW		8
-		"sw",
-#define D_SECTLOG	9
-		"sectlog",
-#define D_SECTSIZE	10
-		"sectsize",
-#define D_NOALIGN	11
-		"noalign",
-#define D_RTINHERIT	12
-		"rtinherit",
-#define D_PROJINHERIT	13
-		"projinherit",
-#define D_EXTSZINHERIT	14
-		"extszinherit",
-#define D_COWEXTSIZE	15
-		"cowextsize",
-		NULL
+		[D_AGCOUNT] = "agcount",
+		[D_FILE] = "file",
+		[D_NAME] = "name",
+		[D_SIZE] = "size",
+		[D_SUNIT] = "sunit",
+		[D_SWIDTH] = "swidth",
+		[D_AGSIZE] = "agsize",
+		[D_SU] = "su",
+		[D_SW] = "sw",
+		[D_SECTLOG] = "sectlog",
+		[D_SECTSIZE] = "sectsize",
+		[D_NOALIGN] = "noalign",
+		[D_RTINHERIT] = "rtinherit",
+		[D_PROJINHERIT] = "projinherit",
+		[D_EXTSZINHERIT] = "extszinherit",
+		[D_COWEXTSIZE] = "cowextsize",
 	},
 	.subopt_params = {
 		{ .index = D_AGCOUNT,
@@ -328,23 +403,14 @@ struct opt_params dopts = {
 struct opt_params iopts = {
 	.name = 'i',
 	.subopts = {
-#define	I_ALIGN		0
-		"align",
-#define	I_LOG		1
-		"log",
-#define	I_MAXPCT	2
-		"maxpct",
-#define	I_PERBLOCK	3
-		"perblock",
-#define	I_SIZE		4
-		"size",
-#define	I_ATTR		5
-		"attr",
-#define	I_PROJID32BIT	6
-		"projid32bit",
-#define I_SPINODES	7
-		"sparse",
-		NULL
+		[I_ALIGN] = "align",
+		[I_LOG] = "log",
+		[I_MAXPCT] = "maxpct",
+		[I_PERBLOCK] = "perblock",
+		[I_SIZE] = "size",
+		[I_ATTR] = "attr",
+		[I_PROJID32BIT] = "projid32bit",
+		[I_SPINODES] = "sparse",
 	},
 	.subopt_params = {
 		{ .index = I_ALIGN,
@@ -409,31 +475,18 @@ struct opt_params iopts = {
 struct opt_params lopts = {
 	.name = 'l',
 	.subopts = {
-#define	L_AGNUM		0
-		"agnum",
-#define	L_INTERNAL	1
-		"internal",
-#define	L_SIZE		2
-		"size",
-#define L_VERSION	3
-		"version",
-#define L_SUNIT		4
-		"sunit",
-#define L_SU		5
-		"su",
-#define L_DEV		6
-		"logdev",
-#define	L_SECTLOG	7
-		"sectlog",
-#define	L_SECTSIZE	8
-		"sectsize",
-#define	L_FILE		9
-		"file",
-#define	L_NAME		10
-		"name",
-#define	L_LAZYSBCNTR	11
-		"lazy-count",
-		NULL
+		[L_AGNUM] = "agnum",
+		[L_INTERNAL] = "internal",
+		[L_SIZE] = "size",
+		[L_VERSION] = "version",
+		[L_SUNIT] = "sunit",
+		[L_SU] = "su",
+		[L_DEV] = "logdev",
+		[L_SECTLOG] = "sectlog",
+		[L_SECTSIZE] = "sectsize",
+		[L_FILE] = "file",
+		[L_NAME] = "name",
+		[L_LAZYSBCNTR] = "lazy-count",
 	},
 	.subopt_params = {
 		{ .index = L_AGNUM,
@@ -530,15 +583,10 @@ struct opt_params lopts = {
 struct opt_params nopts = {
 	.name = 'n',
 	.subopts = {
-#define	N_LOG		0
-		"log",
-#define	N_SIZE		1
-		"size",
-#define	N_VERSION	2
-		"version",
-#define	N_FTYPE		3
-		"ftype",
-	NULL,
+		[N_LOG] = "log",
+		[N_SIZE] = "size",
+		[N_VERSION] = "version",
+		[N_FTYPE] = "ftype",
 	},
 	.subopt_params = {
 		{ .index = N_LOG,
@@ -575,19 +623,12 @@ struct opt_params nopts = {
 struct opt_params ropts = {
 	.name = 'r',
 	.subopts = {
-#define	R_EXTSIZE	0
-		"extsize",
-#define	R_SIZE		1
-		"size",
-#define	R_DEV		2
-		"rtdev",
-#define	R_FILE		3
-		"file",
-#define	R_NAME		4
-		"name",
-#define R_NOALIGN	5
-		"noalign",
-		NULL
+		[R_EXTSIZE] = "extsize",
+		[R_SIZE] = "size",
+		[R_DEV] = "rtdev",
+		[R_FILE] = "file",
+		[R_NAME] = "name",
+		[R_NOALIGN] = "noalign",
 	},
 	.subopt_params = {
 		{ .index = R_EXTSIZE,
@@ -630,15 +671,10 @@ struct opt_params ropts = {
 struct opt_params sopts = {
 	.name = 's',
 	.subopts = {
-#define	S_LOG		0
-		"log",
-#define	S_SECTLOG	1
-		"sectlog",
-#define	S_SIZE		2
-		"size",
-#define	S_SECTSIZE	3
-		"sectsize",
-		NULL
+		[S_LOG] = "log",
+		[S_SECTLOG] = "sectlog",
+		[S_SIZE] = "size",
+		[S_SECTSIZE] = "sectsize",
 	},
 	.subopt_params = {
 		{ .index = S_LOG,
@@ -683,17 +719,11 @@ struct opt_params sopts = {
 struct opt_params mopts = {
 	.name = 'm',
 	.subopts = {
-#define	M_CRC		0
-		"crc",
-#define M_FINOBT	1
-		"finobt",
-#define M_UUID		2
-		"uuid",
-#define M_RMAPBT	3
-		"rmapbt",
-#define M_REFLINK	4
-		"reflink",
-		NULL
+		[M_CRC] = "crc",
+		[M_FINOBT] = "finobt",
+		[M_UUID] = "uuid",
+		[M_RMAPBT] = "rmapbt",
+		[M_REFLINK] = "reflink",
 	},
 	.subopt_params = {
 		{ .index = M_CRC,
-- 
2.15.0