Added support for comments in input to mkenvimage.

This patch adds support for comments in the input to mkenvimage, i.e. in
the environment source: All lines starting with a # in the firs column
will be ignored.

Additionally empty lines will also be ignored.

Signed-off-by: Dominik Muth <dominik.muth@bkvibro.com>

diff --git a/tools/mkenvimage.c b/tools/mkenvimage.c
index bbd3041e36f4e5a2ac909fbe101ecfdd91b6345b..6971b91314fc1707ef78fc2bf2714d13b8f5cb81 100644 (file)
--- a/tools/mkenvimage.c
+++ b/tools/mkenvimage.c
@@ -37,6 +37,8 @@ static void usage(const char *exec_name)
               "\t\tkey1=value1\n"
               "\t\tkey2=value2\n"
               "\t\t...\n"
+              "\tEmpty lines are skipped, and lines with a # in the first\n"
+              "\tcolumn are treated as comments (also skipped).\n"
               "\t-r : the environment has multiple copies in flash\n"
               "\t-b : the target is big endian (default is little endian)\n"
               "\t-p <byte> : fill the image with <byte> bytes instead of 0xff bytes\n"
@@ -221,10 +223,9 @@ int main(int argc, char **argv)
        /* Replace newlines separating variables with \0 */
        for (fp = 0, ep = 0 ; fp < filesize ; fp++) {
                if (filebuf[fp] == '\n') {
-                       if (ep == 0) {
+                       if (fp == 0 || filebuf[fp-1] == '\n') {
                                /*
-                                * Newlines at the beginning of the file ?
-                                * Ignore them.
+                                * Skip empty lines.
                                 */
                                continue;
                        } else if (filebuf[fp-1] == '\\') {
@@ -240,6 +241,10 @@ int main(int argc, char **argv)
                                /* End of a variable */
                                envptr[ep++] = '\0';
                        }
+               } else if ((fp == 0 || filebuf[fp-1] == '\n') && filebuf[fp] == '#') {
+                       /* Comment, skip the line. */
+                       while (++fp < filesize && filebuf[fp] != '\n')
+                       continue;
                } else {
                        envptr[ep++] = filebuf[fp];
                }