kconfig: introduce getline_stripped() helper

Currently, newline characters are stripped away in multiple places
on the caller.

Doing that in the callee is helpful for further cleanups.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index b6a90f6baea14d12d74792377616f5c9573e8ca6..795ac6c9378f1eebd7076e44dde67f97e1768cfb 100644 (file)
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -337,12 +337,32 @@ e_out:
        return -1;
 }
 
+/* like getline(), but the newline character is stripped away */
+static ssize_t getline_stripped(char **lineptr, size_t *n, FILE *stream)
+{
+       ssize_t len;
+
+       len = compat_getline(lineptr, n, stream);
+
+       if (len > 0 && (*lineptr)[len - 1] == '\n') {
+               len--;
+               (*lineptr)[len] = '\0';
+
+               if (len > 0 && (*lineptr)[len - 1] == '\r') {
+                       len--;
+                       (*lineptr)[len] = '\0';
+               }
+       }
+
+       return len;
+}
+
 int conf_read_simple(const char *name, int def)
 {
        FILE *in = NULL;
        char   *line = NULL;
        size_t  line_asize = 0;
-       char *p, *p2, *val;
+       char *p, *val;
        struct symbol *sym;
        int i, def_flags;
        const char *warn_unknown, *werror, *sym_name;
@@ -421,7 +441,7 @@ load:
                }
        }
 
-       while (compat_getline(&line, &line_asize, in) != -1) {
+       while (getline_stripped(&line, &line_asize, in) != -1) {
                conf_lineno++;
                if (line[0] == '#') {
                        if (line[1] != ' ')
@@ -443,19 +463,11 @@ load:
                        p = strchr(sym_name, '=');
                        if (!p)
                                continue;
-                       *p++ = 0;
-                       val = p;
-                       p2 = strchr(p, '\n');
-                       if (p2) {
-                               *p2-- = 0;
-                               if (*p2 == '\r')
-                                       *p2 = 0;
-                       }
+                       *p = 0;
+                       val = p + 1;
                } else {
-                       if (line[0] != '\r' && line[0] != '\n')
-                               conf_warning("unexpected data: %.*s",
-                                            (int)strcspn(line, "\r\n"), line);
-
+                       if (line[0] != '\0')
+                               conf_warning("unexpected data: %s", line);
                        continue;
                }