Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / tools / getline.c

diff --git a/qemu/roms/u-boot/tools/getline.c b/qemu/roms/u-boot/tools/getline.c
new file mode 100644 (file)
index 0000000..f7dbcc9
--- /dev/null
+++ b/qemu/roms/u-boot/tools/getline.c
@@ -0,0 +1,90 @@
+/* getline.c -- Replacement for GNU C library function getline
+ *
+ * Copyright (C) 1993, 1996, 2001, 2002 Free Software Foundation, Inc.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/* Written by Jan Brittenson, bson@gnu.ai.mit.edu.  */
+
+#include <assert.h>
+#include <stdio.h>
+
+/* Always add at least this many bytes when extending the buffer.  */
+#define MIN_CHUNK 64
+
+/* Read up to (and including) a TERMINATOR from STREAM into *LINEPTR
+   + OFFSET (and null-terminate it). *LINEPTR is a pointer returned from
+   malloc (or NULL), pointing to *N characters of space.  It is realloc'd
+   as necessary.  Return the number of characters read (not including the
+   null terminator), or -1 on error or EOF.
+   NOTE: There is another getstr() function declared in <curses.h>.  */
+static int getstr(char **lineptr, size_t *n, FILE *stream,
+                 char terminator, size_t offset)
+{
+       int nchars_avail;       /* Allocated but unused chars in *LINEPTR.  */
+       char *read_pos;         /* Where we're reading into *LINEPTR. */
+       int ret;
+
+       if (!lineptr || !n || !stream)
+               return -1;
+
+       if (!*lineptr) {
+               *n = MIN_CHUNK;
+               *lineptr = malloc(*n);
+               if (!*lineptr)
+                       return -1;
+       }
+
+       nchars_avail = *n - offset;
+       read_pos = *lineptr + offset;
+
+       for (;;) {
+               register int c = getc(stream);
+
+               /* We always want at least one char left in the buffer, since we
+                  always (unless we get an error while reading the first char)
+                  NUL-terminate the line buffer.  */
+
+               assert(*n - nchars_avail == read_pos - *lineptr);
+               if (nchars_avail < 2) {
+                       if (*n > MIN_CHUNK)
+                               *n *= 2;
+                       else
+                               *n += MIN_CHUNK;
+
+                       nchars_avail = *n + *lineptr - read_pos;
+                       *lineptr = realloc(*lineptr, *n);
+                       if (!*lineptr)
+                               return -1;
+                       read_pos = *n - nchars_avail + *lineptr;
+                       assert(*n - nchars_avail == read_pos - *lineptr);
+               }
+
+               if (c == EOF || ferror (stream)) {
+                       /* Return partial line, if any.  */
+                       if (read_pos == *lineptr)
+                               return -1;
+                       else
+                               break;
+               }
+
+               *read_pos++ = c;
+               nchars_avail--;
+
+               if (c == terminator)
+                       /* Return the line.  */
+                       break;
+       }
+
+       /* Done - NUL terminate and return the number of chars read.  */
+       *read_pos = '\0';
+
+       ret = read_pos - (*lineptr + offset);
+       return ret;
+}
+
+int getline (char **lineptr, size_t *n, FILE *stream)
+{
+       return getstr(lineptr, n, stream, '\n', 0);
+}