mdw@git.distorted.org.uk Git - sw-tools/blob - src/sw_arch.h

   1 /* -*-c-*-
   2  *
   3  * $Id: sw_arch.h,v 1.1 1999/06/02 16:53:35 mdw Exp $
   4  *
   5  * Messing with architectures
   6  *
   7  * (c) 1999 EBI
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of sw-tools.
  13  *
  14  * sw-tools is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * sw-tools is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with sw-tools; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: sw_arch.h,v $
  32  * Revision 1.1  1999/06/02 16:53:35  mdw
  33  * Initial revision
  34  *
  35  */
  36
  37 #ifndef SW_ARCH_H
  38 #define SW_ARCH_H
  39
  40 #ifdef __cplusplus
  41   extern "C" {
  42 #endif
  43
  44 /*----- Header files ------------------------------------------------------*/
  45
  46 #include <mLib/dstr.h>
  47
  48 /*----- Data structures ---------------------------------------------------*/
  49
  50 /* --- @archcons@ --- *
  51  *
  52  * Links architectures into a list.  It's done like this so that we can have
  53  * multiple lists all referring to the same data.
  54  */
  55
  56 typedef struct archcons {
  57   struct archent *car;
  58   struct archcons *cdr;
  59 } archcons;
  60
  61 /* --- @archent@ --- *
  62  *
  63  * Records information extracted from the `archtab' file, together with some
  64  * other data used at run-time for the parallel build stuff.
  65  */
  66
  67 typedef struct archent {
  68   struct archcons cons;                 /* Cons for linking these together */
  69   char *arch;                           /* The architecture name */
  70   char *host;                           /* The architecture representative */
  71   int status;                           /* Exit status from build process */
  72   struct sw_remote *r;                  /* Remote command control block */
  73   void *pres;                           /* Data for presentation handler */
  74   unsigned flags;                       /* Various other flags */
  75 } archent;
  76
  77 /* --- Flags --- */
  78
  79 enum {
  80   archFlag_touched = 1,                 /* Unique flag: see @arch_filter@ */
  81   archFlag_built = 2,                   /* This architecture is up-to-date */
  82   archFlag_home = 4                     /* This is the current arch */
  83 };
  84
  85 /*----- Functions provided ------------------------------------------------*/
  86
  87 /* --- @arch_readtab@ --- *
  88  *
  89  * Arguments:   ---
  90  *
  91  * Returns:     The address of the archtab list.
  92  *
  93  * Use:         Reads the archtab file (if necessary) and returns a list of
  94  *              its contents.
  95  */
  96
  97 extern archcons *arch_readtab(void);
  98
  99 /* --- @arch_lookup@ --- *
 100  *
 101  * Arguments:   @const char *arch@ = pointer to archtecture name
 102  *              @int abbrev@ = whether abbreviations are OK
 103  *
 104  * Returns:     Pointer to archtab block, or null.
 105  *
 106  * Use:         Translates an architecture name into the name of a host
 107  *              supporting that architecture.
 108  */
 109
 110 extern archent *arch_lookup(const char */*arch*/, int /*abbrev*/);
 111
 112 /* --- @arch_filter@ --- *
 113  *
 114  * Arguments:   @archcons *a@ = input list to filter
 115  *              @const char *p@ = pointer to a textual list of architectures
 116  *              @unsigned and@, @unsigned xor@ = flags to look for
 117  *
 118  * Returns:     A newly constructed architecture list containing only the
 119  *              listed architectures.
 120  *
 121  * Use:         Filters the architecture list down to a few interesting
 122  *              architectures.
 123  *
 124  *              If @p@ is non-null, it is a textual list of architecture
 125  *              names (possibly abbreviated), and separated by whitespace
 126  *              and/or commas: only the named architectures are included in
 127  *              the resulting list.  If @p@ is null, all architectures are
 128  *              considered.
 129  *
 130  *              The list is further trimmed down by examining the flags words
 131  *              in each entry.  Only entries with flags @f@ where @(f ^ xor)
 132  *              & and@ is zero are left in the resulting list.  (To include
 133  *              all entries, clear @and@ to zero.  To require a flag to be
 134  *              clear, set the corresponding bit in @and@.  To require a flag
 135  *              to be set, set the corresponding bit in both @and@ and @xor@.
 136  *
 137  *              (Don't try to filter on the @archFlag_touched@ flag.  That
 138  *              flag is for the internal use of this routine.)
 139  */
 140
 141 extern archcons *arch_filter(archcons */*a*/, const char */*p*/,
 142                              unsigned /*and*/, unsigned /*xor*/);
 143
 144 /* --- @arch_free@ --- *
 145  *
 146  * Arguments:   @archcons *a@ = pointer to a list
 147  *
 148  * Returns:     ---
 149  *
 150  * Use:         Contrary to anything you might have expected from the Lispy
 151  *              naming, old architecture lists don't get garbage collected.
 152  *              This routine throws away an old list when you don't want it
 153  *              any more.  Don't call this on the main list!  It will fail
 154  *              miserably, because the cons cells in the main list are
 155  *              faked.
 156  */
 157
 158 extern void arch_free(archcons */*a*/);
 159
 160 /* --- @arch_toText@ --- *
 161  *
 162  * Arguments:   @dstr *d@ = pointer to dynamic string to build result in
 163  *              @archcons *a@ = list to write into the string
 164  *              @unsigned and@, @unsigned xor@ = flags to look for
 165  *
 166  * Returns:     ---
 167  *
 168  * Use:         Writes a textual list of architectures to a string.  This can
 169  *              then be used (for example) as the `only-arch' list in the
 170  *              info file, by filling it into a skeleton and calling
 171  *              @swinfo_update@.  The @and@ and @xor@ arguments work in the
 172  *              same way as with @arch_filter@.
 173  */
 174
 175 extern void arch_toText(dstr */*d*/, archcons */*a*/,
 176                         unsigned /*and*/, unsigned /*xor*/);
 177
 178 /* --- Subcommands --- */
 179
 180 extern int sw_arch(int /*argc*/, char */*argv*/[]);
 181 extern int sw_listarch(int /*argc*/, char */*argv*/[]);
 182 extern int sw_host(int /*argc*/, char */*argv*/[]);
 183 extern int sw_only(int /*argc*/, char */*argv*/[]);
 184 extern int sw_all(int /*argc*/, char */*argv*/[]);
 185
 186 #ifdef CMD_LINK
 187    static cmd cmd_only = {
 188      CMD_LINK, "only-arch", sw_only,
 189 "only-arch ARCH,...\n\
 190         Restrict builds to a selection of architectures.  (This option is\n\
 191         persistent.  An `--arch' command-line option takes precedence,\n\
 192         though.)\n"
 193    };
 194    static cmd cmd_all = {
 195      &cmd_only, "all-arch", sw_all,
 196 "all-arch\n\
 197         Clears the `only-arch' list.  Subsequent builds occur across all\n\
 198         architectures.\n"
 199    };
 200    static cmd cmd_host = {
 201      &cmd_all, "host", sw_host,
 202 "host ARCH\n\
 203         Display the name of a host supporting architecture ARCH.\n"
 204    };
 205    static cmd cmd_listarch = {
 206      &cmd_host, "listarch", sw_listarch,
 207 "listarch\n\
 208         Display a list of all architectures known.\n"
 209    };
 210    static cmd cmd_arch = {
 211      &cmd_listarch, "arch", sw_arch,
 212 "arch\tDisplay the architecture name of the current host.\n"
 213    };
 214 #  undef CMD_LINK
 215 #  define CMD_LINK &cmd_arch
 216 #endif
 217
 218 /*----- That's all, folks -------------------------------------------------*/
 219
 220 #ifdef __cplusplus
 221   }
 222 #endif
 223
 224 #endif