XUtils string related updates

- allow count out-parameter of String_split() to be NULL
- introduce xStrndup()
- do not allow NULL pointers passed to String_eq()
  it is not used in any code
- implement String_startsWith(), String_contains_i() and String_eq()
  as inline header functions
- adjust several conversion issues

1 files changed, 2 insertions, 2 deletions

diff --git a/linux/Battery.c b/linux/Battery.c
index f3e2ff24..956a7397 100644
--- a/linux/Battery.c
+++ b/linux/Battery.c
@@ -53,7 +53,7 @@ static unsigned long int parseBatInfo(const char *fileName, const unsigned short
       if (!dirEntry)
          break;
       char* entryName = dirEntry->d_name;
-      if (strncmp(entryName, "BAT", 3))
+      if (String_startsWith(entryName, "BAT"))
          continue;
       batteries[nBatteries] = xStrdup(entryName);
       nBatteries++;
@@ -128,7 +128,7 @@ static ACPresence procAcpiCheck(void) {
       char *isOnline = String_getToken(line, 2);
       free(line);
 
-      if (strcmp(isOnline, "on-line") == 0) {
+      if (String_eq(isOnline, "on-line")) {
          isOn = AC_PRESENT;
       } else {
          isOn = AC_ABSENT;