gravity_utils: Remove readline() from gravity utils

This change removes readline() from gravity_utils because getline() isn't available on some platforms, causing fatal errors during compilation of gravityapi. Since REPL isn't implemented yet, readline() isn't used anywhere anyway.

Would be optimal to implement it as part of gravity.c when we get REPL in.

src/utils/gravity_utils.c

@@ -87,35 +87,6 @@ double millitime (nanotime_t tstart, nanotime_t tend) {
     return ((double)t / 1000000.0f);
 }
 
-// MARK: - Console Functions -
-
-#ifdef WIN32
-// getline is a POSIX function not available in C on Windows (only C++)
-static ssize_t getline (char **lineptr, size_t *n, FILE *stream) {
-    // to be implemented on Windows
-    // Never use gets: it offers no protections against a buffer overflow vulnerability.
-    // see http://stackoverflow.com/questions/3302255/c-scanf-vs-gets-vs-fgets
-    // we should implement something like ggets here
-    // http://web.archive.org/web/20080525133110/http://cbfalconer.home.att.net/download/
-    
-    return -1;
-}
-#endif
-
-char *readline (char *prompt, int *length) {
-    char    *line = NULL;
-    size_t    size = 0;
-    
-    printf("%s", prompt);
-    fflush(stdout);
-    
-    ssize_t nread = getline(&line, &size, stdin);
-    if (nread == -1 || feof(stdin)) return NULL;
-    
-    *length = (int)nread;
-    return line;
-}
-
 // MARK: - I/O Functions -
 
 uint64_t file_size (const char *path) {

src/utils/gravity_utils.h

@@ -27,9 +27,6 @@ nanotime_t  nanotime (void);
 double      microtime (nanotime_t tstart, nanotime_t tend);
 double      millitime (nanotime_t tstart, nanotime_t tend);
 
-// CONSOLE
-char        *readline (char *prompt, int *length);
-
 // FILE
 uint64_t    file_size (const char *path);
 const char  *file_read (const char *path, size_t *len);