action.c

   1 /* $Id: action.c,v 1.16 2009/01/21 11:35:26 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the
   7  * above copyright notice and this permission notice appear in all
   8  * copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
  11  * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
  12  * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
  13  * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  14  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  15  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  16  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19 #include <assert.h>
  20 #include <stdlib.h>
  21 #include <time.h>
  22
  23 #include "private.h"
  24
  25 /*
  26  * Actions are executed on macros after they've been post-validated: in
  27  * other words, a macro will not be "acted upon" until all of its
  28  * children have been filled in (post-fix order).
  29  */
  30
  31 struct  actions {
  32         int     (*post)(struct mdoc *);
  33 };
  34
  35 /* Per-macro action routines. */
  36
  37 static  int      post_sh(struct mdoc *);
  38 static  int      post_os(struct mdoc *);
  39 static  int      post_dt(struct mdoc *);
  40 static  int      post_dd(struct mdoc *);
  41 static  int      post_nm(struct mdoc *);
  42
  43 static  int      post_prologue(struct mdoc *);
  44
  45 /* Array of macro action routines. */
  46
  47 const   struct actions mdoc_actions[MDOC_MAX] = {
  48         { NULL }, /* \" */
  49         { post_dd }, /* Dd */
  50         { post_dt }, /* Dt */
  51         { post_os }, /* Os */
  52         { post_sh }, /* Sh */
  53         { NULL }, /* Ss */
  54         { NULL }, /* Pp */
  55         { NULL }, /* D1 */
  56         { NULL }, /* Dl */
  57         { NULL }, /* Bd */
  58         { NULL }, /* Ed */
  59         { NULL }, /* Bl */
  60         { NULL }, /* El */
  61         { NULL }, /* It */
  62         { NULL }, /* Ad */
  63         { NULL }, /* An */
  64         { NULL }, /* Ar */
  65         { NULL }, /* Cd */
  66         { NULL }, /* Cm */
  67         { NULL }, /* Dv */
  68         { NULL }, /* Er */
  69         { NULL }, /* Ev */
  70         { NULL }, /* Ex */
  71         { NULL }, /* Fa */
  72         { NULL }, /* Fd */
  73         { NULL }, /* Fl */
  74         { NULL }, /* Fn */
  75         { NULL }, /* Ft */
  76         { NULL }, /* Ic */
  77         { NULL }, /* In */
  78         { NULL }, /* Li */
  79         { NULL }, /* Nd */
  80         { post_nm }, /* Nm */
  81         { NULL }, /* Op */
  82         { NULL }, /* Ot */
  83         { NULL }, /* Pa */
  84         { NULL }, /* Rv */
  85         { NULL }, /* St */
  86         { NULL }, /* Va */
  87         { NULL }, /* Vt */
  88         { NULL }, /* Xr */
  89         { NULL }, /* %A */
  90         { NULL }, /* %B */
  91         { NULL }, /* %D */
  92         { NULL }, /* %I */
  93         { NULL }, /* %J */
  94         { NULL }, /* %N */
  95         { NULL }, /* %O */
  96         { NULL }, /* %P */
  97         { NULL }, /* %R */
  98         { NULL }, /* %T */
  99         { NULL }, /* %V */
 100         { NULL }, /* Ac */
 101         { NULL }, /* Ao */
 102         { NULL }, /* Aq */
 103         { NULL }, /* At */
 104         { NULL }, /* Bc */
 105         { NULL }, /* Bf */
 106         { NULL }, /* Bo */
 107         { NULL }, /* Bq */
 108         { NULL }, /* Bsx */
 109         { NULL }, /* Bx */
 110         { NULL }, /* Db */
 111         { NULL }, /* Dc */
 112         { NULL }, /* Do */
 113         { NULL }, /* Dq */
 114         { NULL }, /* Ec */
 115         { NULL }, /* Ef */
 116         { NULL }, /* Em */
 117         { NULL }, /* Eo */
 118         { NULL }, /* Fx */
 119         { NULL }, /* Ms */
 120         { NULL }, /* No */
 121         { NULL }, /* Ns */
 122         { NULL }, /* Nx */
 123         { NULL }, /* Ox */
 124         { NULL }, /* Pc */
 125         { NULL }, /* Pf */
 126         { NULL }, /* Po */
 127         { NULL }, /* Pq */
 128         { NULL }, /* Qc */
 129         { NULL }, /* Ql */
 130         { NULL }, /* Qo */
 131         { NULL }, /* Qq */
 132         { NULL }, /* Re */
 133         { NULL }, /* Rs */
 134         { NULL }, /* Sc */
 135         { NULL }, /* So */
 136         { NULL }, /* Sq */
 137         { NULL }, /* Sm */
 138         { NULL }, /* Sx */
 139         { NULL }, /* Sy */
 140         { NULL }, /* Tn */
 141         { NULL }, /* Ux */
 142         { NULL }, /* Xc */
 143         { NULL }, /* Xo */
 144         { NULL }, /* Fo */
 145         { NULL }, /* Fc */
 146         { NULL }, /* Oo */
 147         { NULL }, /* Oc */
 148         { NULL }, /* Bk */
 149         { NULL }, /* Ek */
 150         { NULL }, /* Bt */
 151         { NULL }, /* Hf */
 152         { NULL }, /* Fr */
 153         { NULL }, /* Ud */
 154 };
 155
 156
 157 /*
 158  * The `Nm' macro sets the document's name when used the first time with
 159  * an argument.  Subsequent calls without a value will result in the
 160  * name value being used.
 161  */
 162 static int
 163 post_nm(struct mdoc *mdoc)
 164 {
 165         char             buf[64];
 166
 167         assert(MDOC_ELEM == mdoc->last->type);
 168         assert(MDOC_Nm == mdoc->last->tok);
 169
 170         if (mdoc->meta.name)
 171                 return(1);
 172
 173         if (xstrlcats(buf, mdoc->last->child, 64)) {
 174                 mdoc->meta.name = xstrdup(buf);
 175                 return(1);
 176         }
 177
 178         return(mdoc_err(mdoc, "macro parameters too long"));
 179 }
 180
 181
 182 /*
 183  * We keep track of the current section in order to provide warnings on
 184  * section ordering, per-section macros, and so on.
 185  */
 186 static int
 187 post_sh(struct mdoc *mdoc)
 188 {
 189         enum mdoc_sec    sec;
 190         char             buf[64];
 191
 192         if (MDOC_HEAD != mdoc->last->type)
 193                 return(1);
 194         if (xstrlcats(buf, mdoc->last->child, 64)) {
 195                 if (SEC_CUSTOM != (sec = mdoc_atosec(buf)))
 196                         mdoc->lastnamed = sec;
 197                 return(1);
 198         }
 199
 200         return(mdoc_err(mdoc, "macro parameters too long"));
 201 }
 202
 203
 204 /*
 205  * Prologue title must be parsed into document meta-data.
 206  */
 207 static int
 208 post_dt(struct mdoc *mdoc)
 209 {
 210         int               i;
 211         char             *p;
 212         struct mdoc_node *n;
 213
 214         assert(MDOC_ELEM == mdoc->last->type);
 215         assert(MDOC_Dt == mdoc->last->tok);
 216
 217         assert(NULL == mdoc->meta.title);
 218
 219         for (i = 0, n = mdoc->last->child; n; n = n->next, i++) {
 220                 assert(MDOC_TEXT == n->type);
 221                 p = n->data.text.string;
 222
 223                 switch (i) {
 224                 case (0):
 225                         mdoc->meta.title = xstrdup(p);
 226                         break;
 227                 case (1):
 228                         mdoc->meta.msec = mdoc_atomsec(p);
 229                         if (MSEC_DEFAULT != mdoc->meta.msec)
 230                                 break;
 231                         return(mdoc_nerr(mdoc, n, "invalid parameter syntax"));
 232                 case (2):
 233                         mdoc->meta.vol = mdoc_atovol(p);
 234                         if (VOL_DEFAULT != mdoc->meta.vol)
 235                                 break;
 236                         mdoc->meta.arch = mdoc_atoarch(p);
 237                         if (ARCH_DEFAULT != mdoc->meta.arch)
 238                                 break;
 239                         return(mdoc_nerr(mdoc, n, "invalid parameter syntax"));
 240                 default:
 241                         return(mdoc_nerr(mdoc, n, "too many parameters"));
 242                 }
 243         }
 244
 245         if (NULL == mdoc->meta.title)
 246                 mdoc->meta.title = xstrdup("untitled");
 247
 248         mdoc_msg(mdoc, "title: %s", mdoc->meta.title);
 249
 250         return(post_prologue(mdoc));
 251 }
 252
 253
 254 /*
 255  * Prologue operating system must be parsed into document meta-data.
 256  */
 257 static int
 258 post_os(struct mdoc *mdoc)
 259 {
 260         char              buf[64];
 261
 262         assert(MDOC_ELEM == mdoc->last->type);
 263         assert(MDOC_Os == mdoc->last->tok);
 264         assert(NULL == mdoc->meta.os);
 265
 266         if ( ! xstrlcats(buf, mdoc->last->child, 64))
 267                 return(mdoc_err(mdoc, "macro parameters too long"));
 268
 269         mdoc->meta.os = xstrdup(buf[0] ? buf : "local");
 270         mdoc->lastnamed = SEC_BODY;
 271
 272         return(post_prologue(mdoc));
 273 }
 274
 275
 276 /*
 277  * Prologue date must be parsed into document meta-data.
 278  */
 279 static int
 280 post_dd(struct mdoc *mdoc)
 281 {
 282         char              buf[64];
 283
 284         assert(MDOC_ELEM == mdoc->last->type);
 285         assert(MDOC_Dd == mdoc->last->tok);
 286
 287         assert(0 == mdoc->meta.date);
 288
 289         if ( ! xstrlcats(buf, mdoc->last->child, 64))
 290                 return(mdoc_err(mdoc, "macro parameters too long"));
 291         if (0 == (mdoc->meta.date = mdoc_atotime(buf)))
 292                 return(mdoc_err(mdoc, "invalid parameter syntax"));
 293
 294         mdoc_msg(mdoc, "date: %u", mdoc->meta.date);
 295
 296         return(post_prologue(mdoc));
 297 }
 298
 299
 300 /*
 301  * The end document shouldn't have the prologue macros as part of the
 302  * syntax tree (they encompass only meta-data).
 303  */
 304 static int
 305 post_prologue(struct mdoc *mdoc)
 306 {
 307         struct mdoc_node *n;
 308
 309         if (mdoc->last->parent->child == mdoc->last)
 310                 mdoc->last->parent->child = mdoc->last->prev;
 311         if (mdoc->last->prev)
 312                 mdoc->last->prev->next = NULL;
 313
 314         n = mdoc->last;
 315         assert(NULL == mdoc->last->next);
 316
 317         if (mdoc->last->prev) {
 318                 mdoc->last = mdoc->last->prev;
 319                 mdoc->next = MDOC_NEXT_SIBLING;
 320         } else {
 321                 mdoc->last = mdoc->last->parent;
 322                 mdoc->next = MDOC_NEXT_CHILD;
 323         }
 324
 325         mdoc_node_freelist(n);
 326         return(1);
 327 }
 328
 329
 330 int
 331 mdoc_action_post(struct mdoc *mdoc)
 332 {
 333
 334         if (MDOC_ACTED & mdoc->last->flags)
 335                 return(1);
 336         mdoc->last->flags |= MDOC_ACTED;
 337
 338         if (MDOC_TEXT == mdoc->last->type)
 339                 return(1);
 340         if (MDOC_ROOT == mdoc->last->type)
 341                 return(1);
 342         if (NULL == mdoc_actions[mdoc->last->tok].post)
 343                 return(1);
 344         return((*mdoc_actions[mdoc->last->tok].post)(mdoc));
 345 }