* configure.in: Move termcap determination a later in the file to catch

[deliverable/binutils-gdb.git] / gdb / source.c

diff --git a/gdb/source.c b/gdb/source.c
index b86df915bc788fd2bc65390669fc3c1b2cde9fe4..997cd1d89a6a505051b01f546bf00a50eeacb777 100644 (file)
--- a/gdb/source.c
+++ b/gdb/source.c
@@ -1,5 +1,5 @@
 /* List lines of source files for GDB, the GNU debugger.
-   Copyright 1986, 1987, 1988, 1989, 1991, 1992, 1993, 1994, 1995
+   Copyright 1986, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 1998
    Free Software Foundation, Inc.
 
 This file is part of GDB.
@@ -41,6 +41,26 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #include "annotate.h"
 #include "gdbtypes.h"
 
+#ifdef CRLF_SOURCE_FILES
+
+/* Define CRLF_SOURCE_FILES in an xm-*.h file if source files on the
+   host use \r\n rather than just \n.  Defining CRLF_SOURCE_FILES is
+   much faster than defining LSEEK_NOT_LINEAR.  */
+
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#define OPEN_MODE (O_RDONLY | O_BINARY)
+#define FDOPEN_MODE FOPEN_RB
+
+#else /* ! defined (CRLF_SOURCE_FILES) */
+
+#define OPEN_MODE O_RDONLY
+#define FDOPEN_MODE FOPEN_RT
+
+#endif /* ! defined (CRLF_SOURCE_FILES) */
+
 /* Prototypes for local functions. */
 
 static int open_source_file PARAMS ((struct symtab *));
@@ -63,11 +83,6 @@ static void show_directories PARAMS ((char *, int));
 
 static void find_source_lines PARAMS ((struct symtab *, int));
 
-/* If we use this declaration, it breaks because of fucking ANSI "const" stuff
-   on some systems.  We just have to not declare it at all, have it default
-   to int, and possibly botch on a few systems.  Thanks, ANSIholes... */
-/* extern char *strstr(); */
-
 /* Path of directories to search for source files.
    Same format as the PATH environment variable's value.  */
 
@@ -184,6 +199,8 @@ select_source_symtab (s)
          current_source_symtab = PSYMTAB_TO_SYMTAB (cs_pst);
        }
     }
+  if (current_source_symtab)
+    return;
 
   error ("Can't find a default source file");
 }
@@ -607,7 +624,7 @@ open_source_file (s)
   /* Quick way out if we already know its full name */
   if (s->fullname) 
     {
-      result = open (s->fullname, O_RDONLY);
+      result = open (s->fullname, OPEN_MODE);
       if (result >= 0)
         return result;
       /* Didn't work -- free old one, try again. */
@@ -636,13 +653,13 @@ open_source_file (s)
        }
     }
 
-  result = openp (path, 0, s->filename, O_RDONLY, 0, &s->fullname);
+  result = openp (path, 0, s->filename, OPEN_MODE, 0, &s->fullname);
   if (result < 0)
     {
       /* Didn't work.  Try using just the basename. */
       p = basename (s->filename);
       if (p != s->filename)
-       result = openp (path, 0, p, O_RDONLY, 0, &s->fullname);
+       result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname);
     }
 #ifdef MPW
   if (result < 0)
@@ -650,14 +667,14 @@ open_source_file (s)
       /* Didn't work.  Try using just the MPW basename. */
       p = (char *) mpw_basename (s->filename);
       if (p != s->filename)
-       result = openp (path, 0, p, O_RDONLY, 0, &s->fullname);
+       result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname);
     }
   if (result < 0)
     {
       /* Didn't work.  Try using the mixed Unix/MPW basename. */
       p = (char *) mpw_mixed_basename (s->filename);
       if (p != s->filename)
-       result = openp (path, 0, p, O_RDONLY, 0, &s->fullname);
+       result = openp (path, 0, p, OPEN_MODE, 0, &s->fullname);
     }
 #endif /* MPW */
 
@@ -955,7 +972,7 @@ print_source_lines (s, line, stopline, noerror)
       perror_with_name (s->filename);
     }
 
-  stream = fdopen (desc, FOPEN_RT);
+  stream = fdopen (desc, FDOPEN_MODE);
   clearerr (stream);
 
   while (nlines-- > 0)
@@ -970,6 +987,12 @@ print_source_lines (s, line, stopline, noerror)
              printf_filtered ("^%c", c + 0100);
          else if (c == 0177)
            printf_filtered ("^?");
+#ifdef CRLF_SOURCE_FILES
+         else if (c == '\r')
+           {
+             /* Just skip \r characters.  */
+           }
+#endif
          else
            printf_filtered ("%c", c);
        } while (c != '\n' && (c = fgetc (stream)) >= 0);
@@ -1309,7 +1332,7 @@ forward_search_command (regex, from_tty)
       perror_with_name (current_source_symtab->filename);
     }
 
-  stream = fdopen (desc, FOPEN_RT);
+  stream = fdopen (desc, FDOPEN_MODE);
   clearerr (stream);
   while (1) {
     static char *buf = NULL;
@@ -1394,7 +1417,7 @@ reverse_search_command (regex, from_tty)
       perror_with_name (current_source_symtab->filename);
     }
 
-  stream = fdopen (desc, FOPEN_RT);
+  stream = fdopen (desc, FDOPEN_MODE);
   clearerr (stream);
   while (line > 1)
     {