Generalize string trunctation util function

Add an additional argument to let the client pass the possible end
chars.

app/src/adb.c

@@ -264,6 +264,6 @@ adb_get_serialno(void) {
         return NULL;
     }
 
-    sc_str_truncate_first_line(buf, r);
+    sc_str_truncate(buf, r, "\r\n");
     return strdup(buf);
 }

app/src/util/str.c

@@ -293,9 +293,9 @@ error:
 }
 
 size_t
-sc_str_truncate_first_line(char *data, size_t len) {
+sc_str_truncate(char *data, size_t len, const char *endchars) {
     data[len - 1] = '\0';
-    char *eol = strpbrk(data, "\r\n");
+    char *eol = strpbrk(data, endchars);
     if (eol) {
         *eol = '\0';
         len = eol - data;

app/src/util/str.h

@@ -104,7 +104,7 @@ char *
 sc_str_wrap_lines(const char *input, unsigned columns, unsigned indent);
 
 /**
- * Truncate the data after the first line
+ * Truncate the data after any of the characters from `endchars`
  *
  * An '\0' is always written at the end of the data, even if no newline
  * character is encountered.
@@ -112,6 +112,6 @@ sc_str_wrap_lines(const char *input, unsigned columns, unsigned indent);
  * Return the size of the resulting line.
  */
 size_t
-sc_str_truncate_first_line(char *data, size_t len);
+sc_str_truncate(char *data, size_t len, const char *endchars);
 
 #endif

app/tests/test_str.c

@@ -337,12 +337,30 @@ static void test_wrap_lines(void) {
     free(formatted);
 }
 
-static void test_truncate_first_line(void) {
+static void test_truncate(void) {
     char s[] = "hello\nworld\n!";
-    size_t len = sc_str_truncate_first_line(s, sizeof(s));
+    size_t len = sc_str_truncate(s, sizeof(s), "\n");
 
     assert(len == 5);
     assert(!strcmp("hello", s));
+
+    char s2[] = "hello\r\nworkd\r\n!";
+    len = sc_str_truncate(s2, sizeof(s2), "\n\r");
+
+    assert(len == 5);
+    assert(!strcmp("hello", s));
+
+    char s3[] = "hello world\n!";
+    len = sc_str_truncate(s3, sizeof(s3), " \n\r");
+
+    assert(len == 5);
+    assert(!strcmp("hello", s3));
+
+    char s4[] = "hello ";
+    len = sc_str_truncate(s4, sizeof(s4), " \n\r");
+
+    assert(len == 5);
+    assert(!strcmp("hello", s4));
 }
 
 int main(int argc, char *argv[]) {
@@ -364,6 +382,6 @@ int main(int argc, char *argv[]) {
     test_parse_integer_with_suffix();
     test_strlist_contains();
     test_wrap_lines();
-    test_truncate_first_line();
+    test_truncate();
     return 0;
 }