Remove problematic split() function

Major issues with split():
 1. It allocates too many array entries
 2. It will seek into out of bounds memory
 3. It seeds to many nulls

See https://github.com/andmarti1424/sc-im/issues/116 for details.

This commit removes split() and replaces its use with some stdlib
functions.

Tests performed:

 - ./scim --half_page_scroll   (verify using :set)
 - ./scim --half_page_scroll=2 (verify using :set)
 - !ls -l

2 files changed, 0 insertions, 28 deletions

diff --git a/src/utils/string.c b/src/utils/string.c
index 753f37f..524637a 100755
--- a/src/utils/string.c
+++ b/src/utils/string.c
@@ -175,33 +175,6 @@ int is_idchar (int d) {
     return 0;
 }
 
-char ** split(char *string, const char delimiter, int lastnull) {
-    int length = 0, count = 0, i = 0, j = 0;
-    while(*(string++)) {
-        if (*string == delimiter) count++;
-        length++;
-    }
-    string -= (length + 1); // string was incremented one more than length
-    char **array = (char **)malloc(sizeof(char *) * (length + 1 + lastnull));
-    char ** base = array;
-    for(i = 0; i < (count + 1); i++) {
-        j = 0;
-        while(string[j] != delimiter) j++;
-        j++;
-        * array = (char *) malloc(sizeof(char) * j);
-        memcpy(*array, string, (j-1));
-        (*array)[j-1] = '\0';
-        string += j;
-        array++;
-    }
-    if (lastnull) {
-        *array = NULL;
-        array++;
-    }
-    *array = '\0';
-    return base;  
-}
-
 char * rtrim(char * string, char junk) {
     char * original = string + strlen(string);
     while(*--original == junk);
diff --git a/src/utils/string.h b/src/utils/string.h
index be54d9d..4dab3f9 100755
--- a/src/utils/string.h
+++ b/src/utils/string.h
@@ -16,7 +16,6 @@ void subst(char * s, char from, char to);
 int is_idchar (int d);
 int str_in_str(char * s, char * b);
 int wstr_in_wstr(wchar_t * s, wchar_t * b);
-char ** split(char *string, const char delimiter, int lastnull);
 char * ltrim(char *string, char junk);
 char * rtrim(char * string, char junk);
 int isnumeric(char * string);