Give in and copy bjam into cdec source code

1 files changed, 223 insertions, 0 deletions

diff --git a/jam-files/engine/search.c b/jam-files/engine/search.c
new file mode 100644
index 00000000..6c23d97a
--- /dev/null
+++ b/jam-files/engine/search.c
@@ -0,0 +1,223 @@
+/*
+ * Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc.
+ *
+ * This file is part of Jam - see jam.c for Copyright information.
+ */
+
+/*  This file is ALSO:
+ *  Copyright 2001-2004 David Abrahams.
+ *  Distributed under the Boost Software License, Version 1.0.
+ *  (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+#include "jam.h"
+#include "lists.h"
+#include "search.h"
+#include "timestamp.h"
+#include "pathsys.h"
+#include "variable.h"
+#include "newstr.h"
+#include "compile.h"
+#include "strings.h"
+#include "hash.h"
+#include "filesys.h"
+#include <string.h>
+
+
+typedef struct _binding
+{
+    char * binding;
+    char * target;
+} BINDING;
+
+static struct hash *explicit_bindings = 0;
+
+
+void call_bind_rule
+(
+    char * target_,
+    char * boundname_
+)
+{
+    LIST * bind_rule = var_get( "BINDRULE" );
+    if ( bind_rule )
+    {
+        /* No guarantee that the target is an allocated string, so be on the
+         * safe side.
+         */
+        char * target = copystr( target_ );
+
+        /* Likewise, do not rely on implementation details of newstr.c: allocate
+         * a copy of boundname.
+         */
+        char * boundname = copystr( boundname_ );
+        if ( boundname && target )
+        {
+            /* Prepare the argument list. */
+            FRAME frame[1];
+            frame_init( frame );
+
+            /* First argument is the target name. */
+            lol_add( frame->args, list_new( L0, target ) );
+
+            lol_add( frame->args, list_new( L0, boundname ) );
+            if ( lol_get( frame->args, 1 ) )
+                evaluate_rule( bind_rule->string, frame );
+
+            /* Clean up */
+            frame_free( frame );
+        }
+        else
+        {
+            if ( boundname )
+                freestr( boundname );
+            if ( target )
+                freestr( target );
+        }
+    }
+}
+
+/*
+ * search.c - find a target along $(SEARCH) or $(LOCATE)
+ * First, check if LOCATE is set. If so, use it to determine
+ * the location of target and return, regardless of whether anything
+ * exists on that location.
+ *
+ * Second, examine all directories in SEARCH. If there's file already
+ * or there's another target with the same name which was placed
+ * to this location via LOCATE setting, stop and return the location.
+ * In case of previous target, return it's name via the third argument.
+ *
+ * This bevahiour allow to handle dependency on generated files. If
+ * caller does not expect that target is generated, 0 can be passed as
+ * the third argument.
+ */
+
+char *
+search(
+    char *target,
+    time_t *time,
+    char **another_target,
+    int file
+)
+{
+    PATHNAME f[1];
+    LIST    *varlist;
+    string    buf[1];
+    int     found = 0;
+    /* Will be set to 1 if target location is specified via LOCATE. */
+    int     explicitly_located = 0;
+    char    *boundname = 0;
+
+    if ( another_target )
+        *another_target = 0;
+
+    if (! explicit_bindings )
+        explicit_bindings = hashinit( sizeof(BINDING),
+                                     "explicitly specified locations");
+
+    string_new( buf );
+    /* Parse the filename */
+
+    path_parse( target, f );
+
+    f->f_grist.ptr = 0;
+    f->f_grist.len = 0;
+
+    if ( ( varlist = var_get( "LOCATE" ) ) )
+      {
+        f->f_root.ptr = varlist->string;
+        f->f_root.len = strlen( varlist->string );
+
+        path_build( f, buf, 1 );
+
+        if ( DEBUG_SEARCH )
+            printf( "locate %s: %s\n", target, buf->value );
+
+        explicitly_located = 1;
+
+        timestamp( buf->value, time );
+        found = 1;
+    }
+    else if ( ( varlist = var_get( "SEARCH" ) ) )
+    {
+        while ( varlist )
+        {
+            BINDING b, *ba = &b;
+            file_info_t *ff;
+
+            f->f_root.ptr = varlist->string;
+            f->f_root.len = strlen( varlist->string );
+
+            string_truncate( buf, 0 );
+            path_build( f, buf, 1 );
+
+            if ( DEBUG_SEARCH )
+                printf( "search %s: %s\n", target, buf->value );
+
+            ff = file_query(buf->value);
+            timestamp( buf->value, time );
+
+            b.binding = buf->value;
+
+            if ( hashcheck( explicit_bindings, (HASHDATA**)&ba ) )
+            {
+                if ( DEBUG_SEARCH )
+                    printf(" search %s: found explicitly located target %s\n",
+                           target, ba->target);
+                if ( another_target )
+                    *another_target = ba->target;
+                found = 1;
+                break;
+            }
+            else if ( ff && ff->time )
+            {
+                if ( !file || ff->is_file )
+                {
+                    found = 1;
+                    break;
+                }
+            }
+
+            varlist = list_next( varlist );
+        }
+    }
+
+    if ( !found )
+    {
+        /* Look for the obvious */
+        /* This is a questionable move.  Should we look in the */
+        /* obvious place if SEARCH is set? */
+
+        f->f_root.ptr = 0;
+        f->f_root.len = 0;
+
+        string_truncate( buf, 0 );
+        path_build( f, buf, 1 );
+
+        if ( DEBUG_SEARCH )
+            printf( "search %s: %s\n", target, buf->value );
+
+        timestamp( buf->value, time );
+    }
+
+    boundname = newstr( buf->value );
+    string_free( buf );
+
+    if ( explicitly_located )
+    {
+        BINDING b;
+        BINDING * ba = &b;
+        b.binding = boundname;
+        b.target = target;
+        /* CONSIDER: we probably should issue a warning is another file
+           is explicitly bound to the same location. This might break
+           compatibility, though. */
+        hashenter( explicit_bindings, (HASHDATA * *)&ba );
+    }
+
+    /* prepare a call to BINDRULE if the variable is set */
+    call_bind_rule( target, boundname );
+
+    return boundname;
+}