Added to the repository

@@ -68,13 +68,14 @@ libmh_a_SOURCES= \
  mh_error.c\
  mh_format.c\
  mh_init.c\
+ mh_list.c\
  mh_fmtgram.y\
  mh_msgset.c\
  mh_whatnow.c
 noinst_HEADERS = mh.h mh_getopt.h
 
-mhlib_DATA = replcomps
-EXTRA_DIST = replcomps
+mhlib_DATA = replcomps mhl.format 
+EXTRA_DIST = replcomps mhl.format 
 
 INCLUDES = -I${top_srcdir}/include -I${top_srcdir}/lib -I${top_srcdir}/mailbox @INTLINCS@
 AM_CPPFLAGS = -DMHLIBDIR=\"$(mhlibdir)\"

+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 2003 Free Software Foundation, Inc.
+
+   GNU Mailutils 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.
+
+   GNU Mailutils 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 GNU Mailutils; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA  */
+
+/* MH mhl command */
+
+#include <mh.h>
+
+/* *********************** Compiler for MHL formats *********************** */
+
+typedef struct
+{
+  char *filename;
+  int line;
+}
+locus_t;
+
+enum mhl_type
+{
+  stmt_cleartext,
+  stmt_component,
+  stmt_variable
+};
+
+enum mhl_datatype
+{
+  dt_flag,
+  dt_integer,
+  dt_string,
+  dt_format
+};
+
+typedef union mhl_value {
+  char *str;
+  int num;
+  mh_format_t *fmt;
+} mhl_value_t;
+
+typedef struct mhl_variable
+{
+  int id;
+  char *name;
+  int type;
+}
+mhl_variable_t;  
+
+typedef struct mhl_stmt mhl_stmt_t;
+typedef struct mhl_stmt_variable mhl_stmt_variable_t;
+typedef struct mhl_stmt_component mhl_stmt_component_t;
+
+struct mhl_stmt_variable
+{
+  mhl_variable_t *id;
+  mhl_value_t value;
+};
+  
+struct mhl_stmt_component
+{
+  char *name;
+  list_t format;
+};
+
+struct mhl_stmt
+{
+  enum mhl_type type;
+  union
+  {
+    char *cleartext;
+    mhl_stmt_variable_t variable;
+    mhl_stmt_component_t component;
+  } v;
+};
+
+static mhl_variable_t *variable_lookup __P((char *name));
+
+static mhl_stmt_t *
+stmt_alloc (enum mhl_type type)
+{
+  mhl_stmt_t *p = xmalloc (sizeof (*p));
+  p->type = type;
+  return p;
+}
+
+static int
+compdecl (char **str, char **compname)
+{
+  char *p;
+  
+  for (p = *str; *p && !isspace (*p); p++)
+    {
+      if (*p == ':')
+	{
+	  int len = p - *str;
+	  *compname = xmalloc (len + 1);
+	  memcpy (*compname, *str, len);
+	  (*compname)[len] = 0;
+	  *str = p + 1;
+	  return 0;
+	}
+    }
+  return 1;
+}
+
+static void parse_variable (locus_t *loc, list_t formlist, char *str);
+
+static void
+parse_cleartext (locus_t *loc, list_t formlist, char *str)
+{
+  int len;
+  mhl_stmt_t *stmt = stmt_alloc (stmt_cleartext);
+  stmt->v.cleartext = strdup (str);
+  len = strlen (stmt->v.cleartext);
+  if (len > 0 && stmt->v.cleartext[len-1] == '\n')
+    stmt->v.cleartext[len-1] = 0;
+  list_append (formlist, stmt);
+}
+
+static void
+parse_component (locus_t *loc, list_t formlist, char *compname, char *str)
+{
+  mhl_stmt_t *stmt = stmt_alloc (stmt_component);
+  stmt->v.component.name = compname;
+  if (list_create (&stmt->v.component.format))
+    {
+      mh_error (_("%s:%d: can't create list"),
+		loc->filename,
+		loc->line);
+      exit (1); /* FIXME */
+    }
+  parse_variable (loc, stmt->v.component.format, str);
+  list_append (formlist, stmt);
+}
+
+static void
+parse_variable (locus_t *loc, list_t formlist, char *str)
+{
+  int i;
+  int argc;
+  char **argv;
+  mh_format_t fmt;
+  
+  if (argcv_get (str, ",=", NULL, &argc, &argv))
+    {
+      mh_error (_("%s:%d: cannot split string %s"),
+		loc->filename,
+		loc->line,
+		str);
+      exit (1);
+    }
+
+  for (i = 0; i < argc; i++)
+    {
+      mhl_stmt_t *stmt = stmt_alloc (stmt_variable);
+      char *name = argv[i];
+      char *value = NULL;
+      mhl_variable_t *var;
+      
+      var = variable_lookup (name);
+      if (!var)
+	{
+	  mh_error (_("%s:%d: unknown variable: %s"),
+		    loc->filename,
+		    loc->line,
+		    argv[i]);
+	  exit (1);
+	}
+
+      if (i + 1 < argc && argv[i+1][0] == '=')
+	{
+	  i++;
+	  value = argv[++i];
+	}
+
+      if ((var->type == dt_flag && value)
+	  || (var->type != dt_flag && !value))
+	{
+	  mh_error (_("%s:%d: wrong datatype for %s"),
+		    loc->filename,
+		    loc->line,
+		    var->name);
+	  exit (1);
+	}
+
+      switch (var->type)
+	{
+	case dt_string:
+	  stmt->v.variable.value.str = strdup (value);
+	  break;
+
+	case dt_integer:
+	  stmt->v.variable.value.num = strtoul (value, NULL, 0);
+	  break;
+
+	case dt_format:
+	  if (mh_format_parse (value, &fmt))
+	    {
+	      mh_error (_("%s:%d: Bad format string"),
+			loc->filename,
+			loc->line);
+	      exit (1);
+	    }
+	  stmt->v.variable.value.fmt = xmalloc (sizeof (mh_format_t));
+	  *stmt->v.variable.value.fmt = fmt;
+	  break;
+
+	case dt_flag:
+	  stmt->v.variable.value.num = strcmp (var->name, name) == 0;
+	  break;
+	}
+      stmt->v.variable.id = var;
+      list_append (formlist, stmt);
+
+      i++;
+      if (i < argc && argv[i][0] != ',')
+	{
+	  mh_error (_("%s:%d: syntax error"), loc->filename, loc->line);
+	  exit (1);
+	}
+    }
+
+  argcv_free (argc, argv);
+}
+
+static int
+parse_line (locus_t *loc, list_t formlist, char *str)
+{
+  char *compname;
+  
+  if (*str == ':')
+    parse_cleartext (loc, formlist, str+1);
+  else if (compdecl (&str, &compname) == 0)
+    parse_component (loc, formlist, compname, str);
+  else
+    parse_variable (loc, formlist, str);
+  return 0;
+}
+
+list_t 
+mhl_format_compile (char *name)
+{
+  FILE *fp;
+  list_t formlist;
+  char *buf = NULL;
+  size_t n = 0;
+  locus_t loc;
+  
+  fp = fopen (name, "r");
+  if (!fp)
+    {
+      mh_error (_("cannot open file %s: %s"), name, mu_strerror (errno));
+      return NULL;
+    }
+
+  if (list_create (&formlist))
+    {
+      fclose (fp);
+      mh_error (_("can't create list"));
+      return NULL;
+    }
+
+  loc.filename = name;
+  loc.line = 1;
+  while (getline (&buf, &n, fp) > 0)
+    {
+      char *p = buf;
+
+      while (*p && isspace (*p))
+	;
+
+      if (*p == 0 || *p == ';')
+	continue;
+
+      parse_line (&loc, formlist, p);
+      loc.line++;
+    }
+
+  free (buf);
+  fclose (fp);
+  
+  return formlist;
+}
+
+
+/* ********************** Destroy compiled MHL format ********************** */
+
+static void
+_destroy_value (enum mhl_datatype type, mhl_value_t *val)
+{
+  switch (type)
+    {
+    case dt_string:
+      free (val->str);
+      break;
+	  
+    case dt_flag:
+    case dt_integer:
+      break;
+
+    case dt_format:
+      mh_format_free (val->fmt);
+      free (val->fmt);
+      break;
+
+    default:
+      abort ();
+    }
+}
+
+static int
+_destroy_stmt (void *item, void *data)
+{
+  mhl_stmt_t *stmt = item;
+
+  switch (stmt->type)
+    {
+    case stmt_cleartext:
+      free (stmt->v.cleartext);
+      break;
+
+    case stmt_component:
+      free (stmt->v.component.name);
+      mhl_format_destroy (&stmt->v.component.format);
+      break;
+
+    case stmt_variable:
+      _destroy_value (stmt->v.variable.id->type, &stmt->v.variable.value);
+      break;
+      
+    default:
+      abort ();
+    }
+  return 0;
+}
+
+void
+mhl_format_destroy (list_t *fmt)
+{
+  list_do (*fmt, _destroy_stmt, NULL);
+  list_destroy (fmt);
+}
+
+
+/* *************************** Runtime functions *************************** */
+/* Integer variables */
+#define I_WIDTH           0
+#define I_LENGTH          1 
+#define I_OFFSET          2
+#define I_OVERFLOWOFFSET  3
+#define I_COMPWIDTH       4
+#define I_MAX             5
+
+/* Boolean (flag) variables */
+#define B_UPPERCASE       0
+#define B_CLEARSCREEN     1
+#define B_BELL            2
+#define B_NOCOMPONENT     3
+#define B_CENTER          4
+#define B_LEFTADJUST      5
+#define B_COMPRESS        6
+#define B_SPLIT           7
+#define B_NEWLINE         8
+#define B_ADDRFIELD       9
+#define B_DATEFIELD      10
+#define B_MAX            11
+		      
+/* String variables */
+#define S_OVERFLOWTEXT   0
+#define S_COMPONENT      1
+#define S_IGNORES        2
+#define S_MAX            3
+		      
+/* Format variables */
+#define F_FORMATFIELD    0
+#define F_MAX            1
+
+static mhl_variable_t vartab[] = {
+  /* Integer variables */
+  { I_WIDTH,          "width",          dt_integer  },
+  { I_LENGTH,         "length",         dt_integer },
+  { I_OFFSET,         "offset",         dt_integer },
+  { I_OVERFLOWOFFSET, "overflowoffset", dt_integer },
+  { I_COMPWIDTH,      "compwidth",      dt_integer },
+
+  /* Boolean (flag) variables */
+  { B_UPPERCASE,      "uppercase",      dt_flag },
+  { B_CLEARSCREEN,    "clearscreen",    dt_flag },
+  { B_BELL,           "bell",           dt_flag },
+  { B_NOCOMPONENT,    "nocomponent",    dt_flag },
+  { B_CENTER,         "center",         dt_flag },
+  { B_LEFTADJUST,     "leftadjust",     dt_flag },
+  { B_COMPRESS,       "compress",       dt_flag },
+  { B_SPLIT,          "split",          dt_flag },
+  { B_NEWLINE,        "newline",        dt_flag },
+  { B_ADDRFIELD,      "addrfield",      dt_flag },
+  { B_DATEFIELD,      "datefield",      dt_flag },
+
+  /* String variables */
+  { S_OVERFLOWTEXT,   "overflowtext",   dt_string },
+  { S_COMPONENT,      "component",      dt_string },
+  { S_IGNORES,        "ignores",        dt_string },
+  
+  /* Format variables */
+  { F_FORMATFIELD,    "formatfield",    dt_format },
+  { 0 }
+};
+	      
+static mhl_variable_t *
+variable_lookup (char *name)
+{
+  mhl_variable_t *p;
+
+  for (p = vartab; p->name; p++)
+    {
+      if (p->type == dt_flag
+	  && memcmp (name, "no", 2) == 0
+	  && strcmp (p->name, name + 2) == 0)
+	return p;
+	  
+      if (strcmp (p->name, name) == 0)
+	return p;
+    }
+  return NULL;
+}
+
+struct eval_env
+{
+  message_t msg;
+  stream_t output;
+  list_t printed_fields;  /* A list of printed header names */
+  int pos;
+  int nlines;
+  int ivar[I_MAX];
+  int bvar[B_MAX];
+  char *svar[S_MAX];
+  mh_format_t *fvar[F_MAX];
+  char *prefix;
+};
+
+static int eval_stmt (void *item, void *data);
+static void newline (struct eval_env *env);
+static void goto_offset (struct eval_env *env, int count);
+static void print (struct eval_env *env, char *str, int nloff);
+
+static int
+_comp_name (void *item, void *date)
+{
+  return strcasecmp (item, date) == 0;
+}
+
+int
+header_is_printed (struct eval_env *env, char *name)
+{
+  return list_do (env->printed_fields, _comp_name, name) == 1;
+}
+
+int
+want_header (struct eval_env *env, char *name)
+{
+  char *p, *str = env->svar[S_IGNORES];
+
+  for (p = strchrnul (str, ','); *str; p = strchrnul (str, ','))
+    {
+      if (strncasecmp (name, str, p - str) == 0)
+	return 0;
+      str = p;
+      if (*str)
+	str++;
+    }
+  return 1;
+}
+
+static int
+eval_var (struct eval_env *env, mhl_stmt_variable_t *var)
+{
+  switch (var->id->type)
+    {
+    case dt_flag:
+      env->bvar[var->id->id] = var->value.num;
+      break;
+      
+    case dt_integer:
+      env->ivar[var->id->id] = var->value.num;
+      break;
+      
+    case dt_string:
+      env->svar[var->id->id] = var->value.str;
+      break;
+
+    case dt_format:
+      env->fvar[var->id->id] = var->value.fmt;
+      break;
+
+    default:
+      abort ();
+    }
+  return 0;
+}
+
+static void
+ovf_print (struct eval_env *env, char *str, int size, int nloff)
+{
+  int ovf = 0;
+
+  while (size)
+    {
+      int len = size;
+      if (ovf)
+	{
+	  goto_offset (env, env->ivar[I_OVERFLOWOFFSET]);
+	  if (env->svar[S_OVERFLOWTEXT])
+	    {
+	      int l = strlen (env->svar[S_OVERFLOWTEXT]);
+	      stream_sequential_write (env->output,
+				       env->svar[S_OVERFLOWTEXT], l);
+	      env->pos += l;
+	    }
+	}
+      else
+	{
+	  if (env->prefix && !env->bvar[B_NOCOMPONENT])
+	    {
+	      goto_offset (env, env->ivar[I_OFFSET]);
+	      
+	      stream_sequential_write (env->output, env->prefix,
+				       strlen (env->prefix));
+	      env->pos += strlen (env->prefix);
+	      
+	      goto_offset (env, nloff);
+	    }
+	}
+      
+      if (env->pos + len > env->ivar[I_WIDTH])
+	{
+	  ovf = 1;
+	  len = env->ivar[I_WIDTH] - env->pos;
+	}
+      
+      stream_sequential_write (env->output, str, len);
+      env->pos += len;
+      if (env->pos >= env->ivar[I_WIDTH])
+	newline (env);
+      str += len;
+      size -= len;
+    }
+}
+
+static void
+print (struct eval_env *env, char *str, int nloff)
+{
+  do
+    {
+      if (*str == '\n')
+	{
+	  newline (env);
+	  str++;
+	}
+      else
+	{
+	  char *p = strchrnul (str, '\n');
+	  ovf_print (env, str, p - str, nloff);
+	  str = p;
+	  if (*p)
+	    {
+	      newline (env);
+	      for (str++; *str && isspace (*str); str++)
+		;
+	    }
+	}
+    }
+  while (*str);
+}
+
+static void
+newline (struct eval_env *env)
+{
+  stream_sequential_write (env->output, "\n", 1);
+  env->pos = 0;
+  if (env->ivar[I_LENGTH] && ++env->nlines >= env->ivar[I_LENGTH])
+    {
+      /* FIXME: Better to write it directly on the terminal */
+      if (env->bvar[B_BELL])
+	stream_sequential_write (env->output, "\a", 1);
+      if (env->bvar[B_CLEARSCREEN])
+	stream_sequential_write (env->output, "\f", 1);
+      env->nlines = 0;
+    }
+}
+
+static void
+goto_offset (struct eval_env *env, int count)
+{
+  for (; env->pos < count; env->pos++)
+    stream_sequential_write (env->output, " ", 1);
+}
+
+int
+print_header_value (struct eval_env *env, char *val)
+{
+  char *p;
+
+  if (env->fvar[F_FORMATFIELD])
+    {
+      if (mh_format_str (env->fvar[F_FORMATFIELD], val,
+			 env->ivar[I_WIDTH], &p))
+	val = p;
+    }
+    
+  if (env->bvar[B_UPPERCASE])
+    {
+      for (p = val; *p; p++)
+	*p = toupper (*p);
+    }
+
+  if (env->bvar[B_COMPRESS])
+    for (p = val; *p; p++)
+      if (*p == '\n')
+	*p = ' ';
+
+  if (env->bvar[B_LEFTADJUST])
+    {
+      for (p = val; *p && isspace (*p); p++)
+	;
+    }
+  else
+    p = val;
+  
+  print (env, p, env->ivar[I_COMPWIDTH]);
+  return 0;
+}
+
+int
+eval_component (struct eval_env *env, char *name)
+{
+  header_t hdr;
+  char *val;
+  
+  message_get_header (env->msg, &hdr);
+  if (header_aget_value (hdr, name, &val))
+    return 0;
+
+  list_append (env->printed_fields, name);
+  print_header_value (env, val);
+  free (val);
+  return 0;
+}
+
+int
+eval_body (struct eval_env *env)
+{
+  body_t body = NULL;
+  stream_t input = NULL;
+  char buf[128]; /* FIXME: Fixed size. Bad */
+  size_t n;
+
+  env->prefix = env->svar[S_COMPONENT];
+  message_get_body (env->msg, &body);
+  body_get_stream (body, &input);
+  stream_seek (input, 0, SEEK_SET);
+  while (stream_sequential_readline (input, buf, sizeof buf, &n) == 0
+	 && n > 0)
+    {
+      buf[n] = 0;
+      print (env, buf, 0);
+    }
+  return 0;
+}
+
+int
+eval_extras (struct eval_env *env)
+{
+  header_t hdr;
+  size_t i, num;
+  char buf[512];
+
+  message_get_header (env->msg, &hdr);
+  header_get_field_count (hdr, &num);
+  for (i = 1; i <= num; i++)
+    {
+      header_get_field_name (hdr, i, buf, sizeof buf, NULL);
+      if (want_header (env, buf)
+	  && !header_is_printed (env, buf))
+	{
+	  goto_offset (env, env->ivar[I_OFFSET]);
+	  print (env, buf, 0);
+	  print (env, ":", 0);
+	  header_get_field_value (hdr, i, buf, sizeof buf, NULL);
+	  print_header_value (env, buf);
+	  if (env->bvar[B_NEWLINE])
+	    newline (env);
+	}
+    }
+  return 0;
+}
+
+int
+eval_comp (struct eval_env *env, char *compname, list_t format)
+{
+  struct eval_env lenv = *env;
+  
+  list_do (format, eval_stmt, &lenv);
+
+  goto_offset (&lenv, lenv.ivar[I_OFFSET]);
+
+  if (!lenv.svar[S_COMPONENT])
+    lenv.svar[S_COMPONENT] = compname;
+  
+  if (!lenv.bvar[B_NOCOMPONENT])
+    {
+      print (&lenv, lenv.svar[S_COMPONENT], 0);
+      if (strcmp (compname, "body"))
+	print (&lenv, ":", 0);
+    }
+
+  if (strcmp (compname, "extras") == 0)
+    eval_extras (&lenv);
+  else if (strcmp (compname, "body") == 0)
+    eval_body (&lenv);
+  else
+    eval_component (&lenv, compname);
+  
+  if (lenv.bvar[B_NEWLINE])
+    newline (&lenv);
+
+  env->pos = lenv.pos;
+  env->nlines = lenv.nlines;
+  
+  return 0;
+}
+
+static int
+eval_stmt (void *item, void *data)
+{
+  mhl_stmt_t *stmt = item;
+  struct eval_env *env = data;
+
+  switch (stmt->type)
+    {
+    case stmt_cleartext:
+      print (env, stmt->v.cleartext, 0);
+      newline (env);
+      break;
+      
+    case stmt_component:
+      eval_comp (env, stmt->v.component.name, stmt->v.component.format);
+      break;
+      
+    case stmt_variable:
+      eval_var (env, &stmt->v.variable);
+      break;
+      
+    default:
+      abort ();
+    }
+
+  return 0;
+}
+
+int
+mhl_format_run (list_t fmt,
+		int width, int length, int clearscreen, int bell,
+		message_t msg, stream_t output)
+{
+  int rc;
+  struct eval_env env;
+
+  /* Initialize the environment */
+  memset (&env, 0, sizeof (env));
+
+  env.bvar[B_NEWLINE] = 1;
+  list_create (&env.printed_fields);
+  env.ivar[I_WIDTH] = width;
+  env.ivar[I_LENGTH] = length;
+  env.bvar[B_CLEARSCREEN] = clearscreen;
+  env.bvar[B_BELL] = bell;
+  env.pos = 0;
+  env.nlines = 0;
+  env.msg = msg;
+  env.output = output;
+  rc = list_do (fmt, eval_stmt, &env);
+  list_destroy (&env.printed_fields);
+  return rc;
+}

+; This is the default mhl.format file for Mailutils MH.
+;
+; GNU Mailutils -- a suite of utilities for electronic mail
+; Copyright (C) 2003 Free Software Foundation, Inc.
+; Distributed under GPL.
+;
+: -- using template mhl.format --
+overflowtext="***",overflowoffset=5
+leftadjust,compwidth=9
+ignores="msgid,message-id,received"
+Date:formatfield="%<(nodate{text})%{text}%|%(pretty{text})%>"
+To:
+cc:
+: 
+From:
+Subject:
+:
+extras:nocomponent
+:
+body:nocomponent,overflowtext="",overflowoffset=0,noleftadjust
+; End of mhl.format
\ No newline at end of file