sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 330 insertions, 0 deletions

diff --git a/support/util/dbuf_string.c b/support/util/dbuf_string.c
new file mode 100644
index 0000000..434ab2d
--- /dev/null
+++ b/support/util/dbuf_string.c
@@ -0,0 +1,330 @@
+/*
+  dbuf_string.c - Append formatted string to the dynamic buffer
+  version 1.2.2, March 20th, 2012
+
+  Copyright (c) 2002-2012 Borut Razem
+
+  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.
+*/
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "dbuf_string.h"
+
+
+/*
+ * Append string to the end of the buffer.
+ * The buffer is null terminated.
+ */
+
+int
+dbuf_append_str (struct dbuf_s *dbuf, const char *str)
+{
+  size_t len;
+  assert (str != NULL);
+
+  len = strlen (str);
+  if (dbuf_append (dbuf, str, len + 1))
+    {
+      --dbuf->len;
+      return 1;
+    }
+  else
+    return 0;
+}
+
+/*
+ * Prepend string to the beginning of the buffer.
+ * The buffer is null terminated.
+ */
+
+int
+dbuf_prepend_str (struct dbuf_s *dbuf, const char *str)
+{
+  size_t len;
+  assert (str != NULL);
+
+  len = strlen (str);
+  return (dbuf_prepend (dbuf, str, len));
+}
+
+/*
+ * Append single character to the end of the buffer.
+ * The buffer is null terminated.
+ */
+
+int
+dbuf_append_char (struct dbuf_s *dbuf, char chr)
+{
+  char buf[2];
+  buf[0] = chr;
+  buf[1] = '\0';
+  if (dbuf_append (dbuf, buf, 2))
+    {
+      --dbuf->len;
+      return 1;
+    }
+  else
+    return 0;
+}
+
+/*
+ * Prepend single character to the end of the buffer.
+ * The buffer is null terminated.
+ */
+
+int
+dbuf_prepend_char (struct dbuf_s *dbuf, char chr)
+{
+  char buf[2];
+  buf[0] = chr;
+  buf[1] = '\0';
+  return (dbuf_prepend_str (dbuf, buf));
+}
+
+/*
+ * Calculate length of the resulting formatted string.
+ *
+ * Borrowed from vasprintf.c
+ */
+
+static int
+calc_result_length (const char *format, va_list args)
+{
+  const char *p = format;
+  /* Add one to make sure that it is never zero, which might cause malloc
+     to return NULL.  */
+  int total_width = strlen (format) + 1;
+  va_list ap;
+
+#ifdef va_copy
+  va_copy (ap, args);
+#else
+  memcpy (&ap, &args, sizeof (va_list));
+#endif
+
+  while (*p != '\0')
+    {
+      if (*p++ == '%')
+        {
+          while (strchr ("-+ #0", *p))
+            ++p;
+          if (*p == '*')
+            {
+              ++p;
+              total_width += abs (va_arg (ap, int));
+            }
+          else
+            total_width += strtoul (p, (char **) &p, 10);
+          if (*p == '.')
+            {
+              ++p;
+              if (*p == '*')
+                {
+                  ++p;
+                  total_width += abs (va_arg (ap, int));
+                }
+              else
+              total_width += strtoul (p, (char **) &p, 10);
+            }
+          while (strchr ("hlL", *p))
+            ++p;
+          /* Should be big enough for any format specifier except %s and floats.  */
+          total_width += 30;
+          switch (*p)
+            {
+            case 'd':
+            case 'i':
+            case 'o':
+            case 'u':
+            case 'x':
+            case 'X':
+            case 'c':
+              (void) va_arg (ap, int);
+              break;
+            case 'f':
+            case 'e':
+            case 'E':
+            case 'g':
+            case 'G':
+              (void) va_arg (ap, double);
+              /* Since an ieee double can have an exponent of 307, we'll
+                 make the buffer wide enough to cover the gross case. */
+              total_width += 307;
+              break;
+            case 's':
+              {
+                const char *p = va_arg (ap, char *);
+                total_width += strlen (p ? p : "(null)");
+              }
+              break;
+            case 'p':
+            case 'n':
+              (void) va_arg (ap, char *);
+              break;
+            }
+          p++;
+        }
+    }
+#ifdef va_copy
+  va_end (ap);
+#endif
+  return total_width;
+}
+
+
+/*
+ * Append the formatted string to the end of the buffer.
+ * The buffer is null terminated.
+ */
+
+int
+dbuf_vprintf (struct dbuf_s *dbuf, const char *format, va_list args)
+{
+  int size = calc_result_length (format, args);
+
+  assert (dbuf != NULL);
+  assert (dbuf->alloc != 0);
+  assert (dbuf->buf != NULL);
+
+  if (0 != _dbuf_expand (dbuf, size))
+    {
+      int len = vsprintf (&(((char *)dbuf->buf)[dbuf->len]), format, args);
+
+      if (len >= 0)
+        {
+          /* if written length is greater then the calculated one,
+             we have a buffer overrun! */
+          assert (len <= size);
+          dbuf->len += len;
+        }
+      return len;
+    }
+
+  return 0;
+}
+
+
+/*
+ * Append the formatted string to the end of the buffer.
+ * The buffer is null terminated.
+ */
+
+int
+dbuf_printf (struct dbuf_s *dbuf, const char *format, ...)
+{
+  va_list arg;
+  int len;
+
+  va_start (arg, format);
+  len = dbuf_vprintf (dbuf, format, arg);
+  va_end (arg);
+
+  return len;
+}
+
+
+/*
+ * Append line from file to the dynamic buffer
+ * The buffer is null terminated.
+ */
+
+size_t
+dbuf_getline (struct dbuf_s *dbuf, FILE *infp)
+{
+  int c;
+  char chr;
+
+  while ((c = getc (infp)) != '\n' && c != EOF)
+    {
+      chr = c;
+
+      dbuf_append (dbuf, &chr, 1);
+    }
+
+  /* add trailing NL */
+  if (c == '\n')
+    {
+      chr = c;
+
+      dbuf_append (dbuf, &chr, 1);
+    }
+
+  /* terminate the line without increasing the length */
+  if (0 != _dbuf_expand (dbuf, 1))
+    ((char *)dbuf->buf)[dbuf->len] = '\0';
+
+  return dbuf_get_length (dbuf);
+}
+
+
+/*
+ * Remove trailing newline from the string.
+ * The buffer is null terminated.
+ * It returns the total number of characters removed.
+ */
+
+size_t
+dbuf_chomp (struct dbuf_s *dbuf)
+{
+  size_t i = dbuf->len;
+  size_t ret;
+
+  if (i != 0 && '\n' == ((char *)dbuf->buf)[i - 1])
+    {
+      --i;
+      if (i != 0 && '\r' == ((char *)dbuf->buf)[i - 1])
+        {
+          --i;
+        }
+    }
+
+  ret = dbuf->len - i;
+  dbuf->len = i;
+
+  /* terminate the line without increasing the length */
+  if (_dbuf_expand(dbuf, 1) != 0)
+    ((char *)dbuf->buf)[dbuf->len] = '\0';
+
+  return ret;
+}
+
+
+/*
+ * Write dynamic buffer to the file.
+ */
+
+void
+dbuf_write (struct dbuf_s *dbuf, FILE *dest)
+{
+  fwrite (dbuf_get_buf (dbuf), 1, dbuf_get_length (dbuf), dest);
+}
+
+
+/*
+ * Write dynamic buffer to the file and destroy it.
+ */
+
+void
+dbuf_write_and_destroy (struct dbuf_s *dbuf, FILE *dest)
+{
+  dbuf_write (dbuf, dest);
+
+  dbuf_destroy (dbuf);
+}