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buildroot/share/fonts/getline.c

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+/**
+ * getline.c --- Based on...
+ *
+ * getdelim.c --- Implementation of replacement getdelim function.
+ * Copyright (C) 1994, 1996, 1997, 1998, 2001, 2003, 2005 Free
+ * Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+/* Ported from glibc by Simon Josefsson. */
+
+#ifdef HAVE_CONFIG_H
+  #include <config.h>
+#endif
+
+#if !HAVE_GETLINE
+
+//#include "getdelim.h"
+#include <stdio.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#ifndef SIZE_MAX
+  #define SIZE_MAX ((size_t) -1)
+#endif
+#ifndef SSIZE_MAX
+  #define SSIZE_MAX ((ssize_t) (SIZE_MAX / 2))
+#endif
+#if !HAVE_FLOCKFILE
+  #undef flockfile
+  #define flockfile(x) ((void)0)
+#endif
+#if !HAVE_FUNLOCKFILE
+  #undef funlockfile
+  #define funlockfile(x) ((void)0)
+#endif
+
+/* Read up to (and including) a DELIMITER from FP into *LINEPTR (and
+   NUL-terminate it).  *LINEPTR is a pointer returned from malloc (or
+   NULL), pointing to *N characters of space.  It is realloc'ed as
+   necessary.  Returns the number of characters read (not including
+   the null terminator), or -1 on error or EOF.  */
+
+ssize_t
+getdelim (char **lineptr, size_t *n, int delimiter, FILE *fp) {
+  ssize_t result;
+  size_t cur_len = 0;
+
+  if (lineptr == NULL || n == NULL || fp == NULL) {
+    errno = EINVAL;
+    return -1;
+  }
+
+  flockfile (fp);
+
+  if (*lineptr == NULL || *n == 0) {
+    *n = 120;
+    *lineptr = (char *) malloc(*n);
+    if (*lineptr == NULL) {
+      result = -1;
+      goto unlock_return;
+    }
+  }
+
+  for (;;) {
+    int i;
+
+    i = getc(fp);
+    if (i == EOF) {
+      result = -1;
+      break;
+    }
+
+    /* Make enough space for len+1 (for final NUL) bytes.  */
+    if (cur_len + 1 >= *n) {
+      size_t needed_max =
+        SSIZE_MAX < SIZE_MAX ? (size_t) SSIZE_MAX + 1 : SIZE_MAX;
+      size_t needed = 2 * *n + 1;   /* Be generous. */
+      char *new_lineptr;
+
+      if (needed_max < needed)
+        needed = needed_max;
+      if (cur_len + 1 >= needed) {
+        result = -1;
+        goto unlock_return;
+      }
+
+      new_lineptr = (char *) realloc (*lineptr, needed);
+      if (new_lineptr == NULL) {
+        result = -1;
+        goto unlock_return;
+      }
+
+      *lineptr = new_lineptr;
+      *n = needed;
+    }
+
+    (*lineptr)[cur_len] = i;
+    cur_len++;
+
+    if (i == delimiter) break;
+  }
+  (*lineptr)[cur_len] = '\0';
+  result = cur_len ? (int) cur_len : (int) result;
+
+  unlock_return:
+  funlockfile(fp);
+  return result;
+}
+
+#endif