[M] Change in flashrom[master]: flashrom.c: Rewrite flashbuses_to_text()

[Edward O'Callaghan (Code Review)]

Edward O'Callaghan has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/69219 )

Change subject: flashrom.c: Rewrite flashbuses_to_text()
......................................................................

flashrom.c: Rewrite flashbuses_to_text()

The previous implementation was not total on the function
domain and had many edge cases.

BUG=issues/408
TEST=`./flashrom -p internal --flash-name -VVV | grep proto`.

Change-Id: Iafa757603ce262faf976b98c8bbf0ba4b780c3cb
Signed-off-by: Edward O'Callaghan 
---
M flashrom.c
1 file changed, 32 insertions(+), 19 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/19/69219/1

diff --git a/flashrom.c b/flashrom.c
index f0049b2..594186e 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -771,30 +771,27 @@
  */
 char *flashbuses_to_text(enum chipbustype bustype)
 {
-	char *ret = calloc(1, 1);
    /*
     * FIXME: Once all chipsets and flash chips have been updated, NONSPI
     * will cease to exist and should be eliminated here as well.
     */
-	if (bustype == BUS_NONSPI) {
-		ret = strcat_realloc(ret, "Non-SPI, ");
-	} else {
-		if (bustype & BUS_PARALLEL)
-			ret = strcat_realloc(ret, "Parallel, ");
-		if (bustype & BUS_LPC)
-			ret = strcat_realloc(ret, "LPC, ");
-		if (bustype & BUS_FWH)
-			ret = strcat_realloc(ret, "FWH, ");
-		if (bustype & BUS_SPI)
-			ret = strcat_realloc(ret, "SPI, ");
-		if (bustype & BUS_PROG)
-			ret = strcat_realloc(ret, "Programmer-specific, ");
-		if (bustype == BUS_NONE)
-			ret = strcat_realloc(ret, "None, ");
+	static const char *const bustypes[] = {
+		[BUS_NONSPI]	= "Non-SPI",
+		[BUS_PARALLEL]	= "Parallel",
+		[BUS_LPC]	= "LPC",
+		[BUS_FWH]	= "FWH",
+		[BUS_SPI]	= "SPI",
+		[BUS_PROG]	= "Programmer-specific",
+		[BUS_NONE]	= "None",
+	};
+	char *ret = calloc(1, 1);
+	for (unsigned int i = 0; i < ARRAY_SIZE(bustypes); i++) {
+		if (bustype & i) {
+			if (strlen(ret) > 1)
+				ret = strcat_realloc(ret, ", ");
+			ret = strcat_realloc(ret, bustypes[i]);
+		}
    }
-	/* Kill last comma. */
-	ret[strlen(ret) - 2] = '\0';
-	ret = realloc(ret, strlen(ret) + 1);
    return ret;
 }