mx_util: Add mx_str*beginswith*()

mx_util.c

@@ -15,6 +15,69 @@
 
 #include "mx_util.h"
 
+static inline int _mx_strbeginswith(char *str, const char *start, char **endptr, short ignore_case)
+{
+    size_t len;
+    int res;
+
+    assert(str);
+    assert(start);
+
+    len = strlen(start);
+    if (ignore_case)
+        res = strncasecmp(str, start, len);
+    else
+        res = strncmp(str, start, len);
+
+    if (res != 0 || !endptr)
+        return !res;
+
+    *endptr  = str + len;
+
+    return 1;
+}
+
+inline int mx_strbeginswith(char *str, const char *start, char **endptr)
+{
+    return _mx_strbeginswith(str, start, endptr, 0);
+}
+
+inline int mx_stribeginswith(char *str, const char *start, char **endptr)
+{
+    return _mx_strbeginswith(str, start, endptr, 1);
+}
+
+static inline int _mx_strbeginswithany(char *str, char **starts, char **endptr, short ignore_case)
+{
+    char **s;
+    char *end;
+    char *longestmatch = NULL;
+    int res;
+
+    for (s = starts; *s; s++) {
+        res = _mx_strbeginswith(str, *s, &end, ignore_case);
+        if (res && (!longestmatch || end > longestmatch))
+            longestmatch = end;
+    }
+
+    if (longestmatch) {
+        *endptr = longestmatch;
+        return 1;
+    }
+
+    return 0;
+}
+
+inline int mx_strbeginswithany(char *str, char **starts, char **endptr)
+{
+    return _mx_strbeginswithany(str, starts, endptr, 0);
+}
+
+inline int mx_stribeginswithany(char *str, char **starts, char **endptr)
+{
+    return _mx_strbeginswithany(str, starts, endptr, 1);
+}
+
 inline char *mx_strskipwhitespaces(char *str)
 {
     char *s;

mx_util.h

@@ -4,6 +4,10 @@
 #include <stdint.h>
 #include <stdarg.h>
 
+int mx_strbeginswith(char *str, const char *start, char **endptr);
+int mx_stribeginswith(char *str, const char *start, char **endptr);
+int mx_strbeginswithany(char *str, char **starts, char **endptr);
+
 char *mx_strskipwhitespaces(char *str);
 
 int mx_strtoul(char *str,  unsigned long int *to);

test_mx_util.c

@@ -105,6 +105,81 @@ static void test_mx_strtoi8(void)
     assert(mx_strtoi8("-129", &u) == -ERANGE);
 }
 
+static void test_mx_strbeginswith(void)
+{
+    char *end = NULL;
+
+    assert(mx_strbeginswith("blahblubb", "", NULL));
+
+    assert(mx_strbeginswith("blahblubb", "", &end));
+    assert(strcmp(end, "blahblubb") == 0);
+
+    assert(mx_strbeginswith("BlahBlubb", "Blah", &end));
+    assert(strcmp(end, "Blubb") == 0);
+
+    assert(mx_strbeginswith("blahblubb", "blahblubb", &end));
+    assert(*end == 0);
+
+    end = NULL;
+
+    assert(mx_strbeginswith("blahblubb", "blubb", &end) == 0);
+    assert(end == NULL);
+
+    assert(mx_strbeginswith("blah", "blahblubb", &end) == 0);
+    assert(end == NULL);
+
+    assert(mx_strbeginswith("Blahblubb", "blah", &end) == 0);
+    assert(end == NULL);
+
+    assert(mx_strbeginswith("", "blah", &end) == 0);
+    assert(end == NULL);
+}
+
+static void test_mx_stribeginswith(void)
+{
+    char *end = NULL;
+
+    assert(mx_stribeginswith("blahblubb", "", NULL));
+
+    assert(mx_stribeginswith("blahblubb", "", &end));
+    assert(strcmp(end, "blahblubb") == 0);
+
+    assert(mx_stribeginswith("BlahBlubb", "Blah", &end));
+    assert(strcmp(end, "Blubb") == 0);
+
+    assert(mx_stribeginswith("BlahBlubb", "bLaH", &end));
+    assert(strcmp(end, "Blubb") == 0);
+
+
+    assert(mx_stribeginswith("blahblubb", "BlahBluBB", &end));
+    assert(*end == 0);
+
+    end = NULL;
+
+    assert(mx_stribeginswith("blahblubb", "blubb", &end) == 0);
+    assert(end == NULL);
+
+    assert(mx_stribeginswith("blah", "blahblubb", &end) == 0);
+    assert(end == NULL);
+
+    assert(mx_stribeginswith("", "blah", &end) == 0);
+    assert(end == NULL);
+}
+
+static void test_mx_strbeginswithany(void)
+{
+    char *end = NULL;
+
+    assert(mx_strbeginswithany("blahblubb", (char *[]){ "bla", "blah", NULL }, &end));
+    assert(strcmp(end, "blubb") == 0);
+
+    assert(mx_strbeginswithany("blablubb", (char *[]){ "bla", "blah", NULL }, &end));
+    assert(strcmp(end, "blubb") == 0);
+
+    end = NULL;
+    assert(mx_strbeginswithany("blubb", (char *[]){ "bla", "blah", NULL }, &end) == 0);
+    assert(end == NULL);
+}
 
 int main(int argc, char *argv[])
 {
@@ -113,6 +188,8 @@ int main(int argc, char *argv[])
     test_mx_strtoull();
     test_mx_strtou8();
     test_mx_strtoi8();
-
+    test_mx_strbeginswith();
+    test_mx_stribeginswith();
+    test_mx_strbeginswithany();
     return 0;
 }