New module 'getnline'.

[gnulib.git] / lib / getline.c

diff --git a/lib/getline.c b/lib/getline.c
index f4edecc..ccc3b4a 100644 (file)
--- a/lib/getline.c
+++ b/lib/getline.c
@@ -23,6 +23,7 @@
 # include <config.h>
 #endif
 
+/* Specification.  */
 #include "getline.h"
 
 /* The `getdelim' function is only declared if the following symbol
@@ -44,105 +45,17 @@ getline (char **lineptr, size_t *n, FILE *stream)
 
 #else /* ! have getdelim */
 
-# if STDC_HEADERS
-#  include <stdlib.h>
-# else
-char *malloc (), *realloc ();
-# endif
-
-#include "unlocked-io.h"
-
-/* Always add at least this many bytes when extending the buffer.  */
-#define MIN_CHUNK 64
-
-/* Read up to (and including) a delimiter DELIM1 from STREAM into *LINEPTR
-   + OFFSET (and NUL-terminate it).  If DELIM2 is non-zero, then read up
-   and including the first occurrence of DELIM1 or DELIM2.  *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 NUL terminator), or -1 on error or EOF.  */
-
-static int
-getdelim2 (char **lineptr, size_t *n, FILE *stream, int delim1, int delim2,
-          size_t offset)
-{
-  size_t 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;
-    }
-
-  if (*n < offset)
-    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.  */
-
-      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;
-       }
-
-      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 == delim1 || (delim2 && c == delim2))
-       /* Return the line.  */
-       break;
-    }
-
-  /* Done - NUL terminate and return the number of chars read.  */
-  *read_pos = '\0';
-
-  ret = read_pos - (*lineptr + offset);
-  return ret;
-}
-
+#include "getndelim2.c"
 
 int
 getline (char **lineptr, size_t *n, FILE *stream)
 {
-  return getdelim2 (lineptr, n, stream, '\n', 0, 0);
+  return getndelim2 (lineptr, n, (size_t)(-1), stream, '\n', 0, 0);
 }
 
 int
 getdelim (char **lineptr, size_t *n, int delimiter, FILE *stream)
 {
-  return getdelim2 (lineptr, n, stream, delimiter, 0, 0);
+  return getndelim2 (lineptr, n, (size_t)(-1), stream, delimiter, 0, 0);
 }
 #endif