deprecated os.h and removed scanf from istream as it can't return the end position

deprecated/os.c

@@ -0,0 +1,107 @@
+#include "os.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#ifdef _WIN32
+#define _BUFSZ 128
+
+#include <lmcons.h>
+
+// modified from netbsd source http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/pkgtools/libnbcompat/files/getdelim.c?only_with_tag=MAIN
+isize getdelim(char **buf, size_t *bufsz, int delimiter, FILE *fp) {
+    char *ptr, *eptr;
+
+    if(*buf == NULL || *bufsz == 0) {
+        *bufsz = _BUFSZ;
+        if((*buf = malloc(*bufsz)) == NULL) {
+            return -1;
+        }
+    }
+
+    isize result = -1;
+    // usually fgetc locks every read, using windows-specific 
+    // _lock_file and _unlock_file will be faster
+    _lock_file(fp);
+
+    for(ptr = *buf, eptr = *buf + *bufsz;;) {
+        int c = _getc_nolock(fp);
+        if(c == -1) {
+            if(feof(fp)) {
+                isize diff = (isize)(ptr - *buf);
+                if(diff != 0) {
+                    *ptr = '\0';
+                    result = diff;
+                    break;
+                }
+            }
+            break;
+        }
+        *ptr++ = (char)c;
+        if(c == delimiter) {
+            *ptr = '\0';
+            result = ptr - *buf;
+            break;
+        }
+        if((ptr + 2) >= eptr) {
+            char *nbuf;
+            size_t nbufsz = *bufsz * 2;
+            isize d = ptr - *buf;
+            if((nbuf = realloc(*buf, nbufsz)) == NULL) {
+                break;
+            }
+            *buf = nbuf;
+            *bufsz = nbufsz;
+            eptr = nbuf + nbufsz;
+            ptr = nbuf + d;
+        }
+    }
+
+    _unlock_file(fp);
+    return result;
+}
+
+// taken from netbsd source http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/pkgtools/libnbcompat/files/getline.c?only_with_tag=MAIN
+isize getline(char **line_ptr, size_t *n, FILE *stream) {
+    return getdelim(line_ptr, n, '\n', stream);
+}
+
+str_t getUserName() {    
+    char buf[UNLEN + 1];
+    DWORD sz = sizeof(buf);
+    BOOL res = GetUserNameA(buf, &sz);
+    if(!res) {
+        return strInit();
+    }
+    return strFromBuf(buf, sz);
+}
+
+#else
+
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <ctype.h>
+
+int stricmp(const char *a, const char *b) {
+    int result;
+    
+    if (a == b) {
+        return 0;
+    }
+
+    while ((result = tolower(*a) - tolower(*b++)) == 0) {
+        if (*a++ == '\0') {
+            break;
+        }
+    }
+
+    return result;
+}
+
+str_t getUserName() {
+    return strFromStr(getlogin());
+}
+
+#endif