Place mandoc.css into the public domain.

[mandoc.git] / mandoc.c

diff --git a/mandoc.c b/mandoc.c
index d493c22f82de071828b6aed4f24ee785c98f2923..5476fb410e2d2f25d706f1be70b7ffb0865e9775 100644 (file)
--- a/mandoc.c
+++ b/mandoc.c
@@ -1,7 +1,7 @@
-/*     $Id: mandoc.c,v 1.42 2011/03/20 16:02:05 kristaps Exp $ */
+/*     $Id: mandoc.c,v 1.108 2018/10/25 01:32:40 schwarze Exp $ */

 /*
 /*

- * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011-2015, 2017, 2018 Ingo Schwarze <schwarze@openbsd.org>

  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above


@@ -15,285 +15,390 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

-#ifdef HAVE_CONFIG_H

 #include "config.h"
 #include "config.h"

-#endif

 
 #include <sys/types.h>
 
 #include <assert.h>
 #include <ctype.h>
 
 #include <sys/types.h>
 
 #include <assert.h>
 #include <ctype.h>

+#include <errno.h>
+#include <limits.h>

 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <time.h>
 
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include <time.h>
 

+#include "mandoc_aux.h"

 #include "mandoc.h"
 #include "mandoc.h"

+#include "roff.h"

 #include "libmandoc.h"
 
 #include "libmandoc.h"
 

-#define DATESIZE 32
-

 static int      a2time(time_t *, const char *, const char *);
 static char    *time2a(time_t);
 
 static int      a2time(time_t *, const char *, const char *);
 static char    *time2a(time_t);
 

-int
-mandoc_special(char *p)
+
+enum mandoc_esc
+mandoc_escape(const char **end, const char **start, int *sz)

 {
 {

-       int              len, i;
+       const char      *local_start;
+       int              local_sz, c, i;

        char             term;
        char             term;

-       char            *sv;
-       
-       len = 0;
-       term = '\0';
-       sv = p;
+       enum mandoc_esc  gly;

 
 

-       assert('\\' == *p);
-       p++;
+       /*
+        * When the caller doesn't provide return storage,
+        * use local storage.
+        */

 
 

-       switch (*p++) {
-#if 0
-       case ('Z'):
-               /* FALLTHROUGH */
-       case ('X'):
-               /* FALLTHROUGH */
-       case ('x'):
-               /* FALLTHROUGH */
-       case ('S'):
-               /* FALLTHROUGH */
-       case ('R'):
-               /* FALLTHROUGH */
-       case ('N'):
-               /* FALLTHROUGH */
-       case ('l'):
-               /* FALLTHROUGH */
-       case ('L'):
-               /* FALLTHROUGH */
-       case ('H'):
-               /* FALLTHROUGH */
-       case ('h'):
-               /* FALLTHROUGH */
-       case ('D'):
-               /* FALLTHROUGH */
-       case ('C'):
-               /* FALLTHROUGH */
-       case ('b'):
-               /* FALLTHROUGH */
-       case ('B'):
-               /* FALLTHROUGH */
-       case ('a'):
-               /* FALLTHROUGH */
-       case ('A'):
-               if (*p++ != '\'')
-                       return(0);
-               term = '\'';
-               break;
-#endif
-       case ('h'):
-               /* FALLTHROUGH */
-       case ('v'):
-               /* FALLTHROUGH */
-       case ('s'):
-               if (ASCII_HYPH == *p)
-                       *p = '-';
-
-               i = 0;
-               if ('+' == *p || '-' == *p) {
-                       p++;
-                       i = 1;
-               }
+       if (NULL == start)
+               start = &local_start;
+       if (NULL == sz)
+               sz = &local_sz;

 
 

-               switch (*p++) {
-               case ('('):
-                       len = 2;
-                       break;
-               case ('['):
-                       term = ']';
-                       break;
-               case ('\''):
-                       term = '\'';
-                       break;
-               case ('0'):
-                       i = 1;
-                       /* FALLTHROUGH */
-               default:
-                       len = 1;
-                       p--;
-                       break;
-               }
+       /*
+        * Beyond the backslash, at least one input character
+        * is part of the escape sequence.  With one exception
+        * (see below), that character won't be returned.
+        */

 
 

-               if (ASCII_HYPH == *p)
-                       *p = '-';
-               if ('+' == *p || '-' == *p) {
-                       if (i)
-                               return(0);
-                       p++;
-               } 
-               
-               /* Handle embedded numerical subexp or escape. */
-
-               if ('(' == *p) {
-                       while (*p && ')' != *p)
-                               if ('\\' == *p++) {
-                                       i = mandoc_special(--p);
-                                       if (0 == i)
-                                               return(0);
-                                       p += i;
-                               }
+       gly = ESCAPE_ERROR;
+       *start = ++*end;
+       *sz = 0;
+       term = '\0';

 
 

-                       if (')' == *p++)
-                               break;
+       switch ((*start)[-1]) {
+       /*
+        * First the glyphs.  There are several different forms of
+        * these, but each eventually returns a substring of the glyph
+        * name.
+        */
+       case '(':
+               gly = ESCAPE_SPECIAL;
+               *sz = 2;
+               break;
+       case '[':
+               gly = ESCAPE_SPECIAL;
+               term = ']';
+               break;
+       case 'C':
+               if ('\'' != **start)
+                       return ESCAPE_ERROR;
+               *start = ++*end;
+               gly = ESCAPE_SPECIAL;
+               term = '\'';
+               break;

 
 

-                       return(0);
-               } else if ('\\' == *p) {
-                       if (0 == (i = mandoc_special(p)))
-                               return(0);
-                       p += i;
-               }
+       /*
+        * Escapes taking no arguments at all.
+        */
+       case 'd':
+       case 'u':
+       case ',':
+       case '/':
+               return ESCAPE_IGNORE;
+       case 'p':
+               return ESCAPE_BREAK;

 
 

-               break;
-#if 0
-       case ('Y'):
-               /* FALLTHROUGH */
-       case ('V'):
-               /* FALLTHROUGH */
-       case ('$'):
-               /* FALLTHROUGH */
-       case ('n'):
-               /* FALLTHROUGH */
-#endif
-       case ('k'):
-               /* FALLTHROUGH */
-       case ('M'):
-               /* FALLTHROUGH */
-       case ('m'):
-               /* FALLTHROUGH */
-       case ('f'):
-               /* FALLTHROUGH */
-       case ('F'):
+       /*
+        * The \z escape is supposed to output the following
+        * character without advancing the cursor position.
+        * Since we are mostly dealing with terminal mode,
+        * let us just skip the next character.
+        */
+       case 'z':
+               return ESCAPE_SKIPCHAR;
+
+       /*
+        * Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
+        * 'X' is the trigger.  These have opaque sub-strings.
+        */
+       case 'F':
+       case 'g':
+       case 'k':
+       case 'M':
+       case 'm':
+       case 'n':
+       case 'V':
+       case 'Y':
+               gly = ESCAPE_IGNORE;

                /* FALLTHROUGH */
                /* FALLTHROUGH */

-       case ('*'):
-               switch (*p++) {
-               case ('('):
-                       len = 2;
+       case 'f':
+               if (ESCAPE_ERROR == gly)
+                       gly = ESCAPE_FONT;
+               switch (**start) {
+               case '(':
+                       *start = ++*end;
+                       *sz = 2;

                        break;
                        break;

-               case ('['):
+               case '[':
+                       *start = ++*end;

                        term = ']';
                        break;
                default:
                        term = ']';
                        break;
                default:

-                       len = 1;
-                       p--;
+                       *sz = 1;

                        break;
                }
                break;
                        break;
                }
                break;

-       case ('('):
-               len = 2;
+       case '*':
+               if (strncmp(*start, "(.T", 3) != 0)
+                       abort();
+               gly = ESCAPE_DEVICE;
+               *start = ++*end;
+               *sz = 2;

                break;
                break;

-       case ('['):
-               term = ']';
+
+       /*
+        * These escapes are of the form \X'Y', where 'X' is the trigger
+        * and 'Y' is any string.  These have opaque sub-strings.
+        * The \B and \w escapes are handled in roff.c, roff_res().
+        */
+       case 'A':
+       case 'b':
+       case 'D':
+       case 'R':
+       case 'X':
+       case 'Z':
+               gly = ESCAPE_IGNORE;
+               /* FALLTHROUGH */
+       case 'o':
+               if (**start == '\0')
+                       return ESCAPE_ERROR;
+               if (gly == ESCAPE_ERROR)
+                       gly = ESCAPE_OVERSTRIKE;
+               term = **start;
+               *start = ++*end;

                break;
                break;

-       case ('z'):
-               len = 1;
-               if ('\\' == *p) {
-                       if (0 == (i = mandoc_special(p)))
-                               return(0);
-                       p += i;
-                       return(*p ? (int)(p - sv) : 0);
+
+       /*
+        * These escapes are of the form \X'N', where 'X' is the trigger
+        * and 'N' resolves to a numerical expression.
+        */
+       case 'h':
+       case 'H':
+       case 'L':
+       case 'l':
+       case 'S':
+       case 'v':
+       case 'x':
+               if (strchr(" %&()*+-./0123456789:<=>", **start)) {
+                       if ('\0' != **start)
+                               ++*end;
+                       return ESCAPE_ERROR;

                }
                }

-               break;
-       case ('o'):
-               /* FALLTHROUGH */
-       case ('w'):
-               if ('\'' == *p++) {
-                       term = '\'';
+               switch ((*start)[-1]) {
+               case 'h':
+                       gly = ESCAPE_HORIZ;
+                       break;
+               case 'l':
+                       gly = ESCAPE_HLINE;
+                       break;
+               default:
+                       gly = ESCAPE_IGNORE;

                        break;
                }
                        break;
                }

-               /* FALLTHROUGH */
-       default:
-               len = 1;
-               p--;
+               term = **start;
+               *start = ++*end;

                break;
                break;

-       }
-
-       if (term) {
-               for ( ; *p && term != *p; p++)
-                       if (ASCII_HYPH == *p)
-                               *p = '-';
-               return(*p ? (int)(p - sv) : 0);
-       }

 
 

-       for (i = 0; *p && i < len; i++, p++)
-               if (ASCII_HYPH == *p)
-                       *p = '-';
-       return(i == len ? (int)(p - sv) : 0);
-}
-
-
-void *
-mandoc_calloc(size_t num, size_t size)
-{
-       void            *ptr;
+       /*
+        * Special handling for the numbered character escape.
+        * XXX Do any other escapes need similar handling?
+        */
+       case 'N':
+               if ('\0' == **start)
+                       return ESCAPE_ERROR;
+               (*end)++;
+               if (isdigit((unsigned char)**start)) {
+                       *sz = 1;
+                       return ESCAPE_IGNORE;
+               }
+               (*start)++;
+               while (isdigit((unsigned char)**end))
+                       (*end)++;
+               *sz = *end - *start;
+               if ('\0' != **end)
+                       (*end)++;
+               return ESCAPE_NUMBERED;

 
 

-       ptr = calloc(num, size);
-       if (NULL == ptr) {
-               perror(NULL);
-               exit((int)MANDOCLEVEL_SYSERR);
-       }
+       /*
+        * Sizes get a special category of their own.
+        */
+       case 's':
+               gly = ESCAPE_IGNORE;

 
 

-       return(ptr);
-}
+               /* See +/- counts as a sign. */
+               if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
+                       *start = ++*end;

 
 

+               switch (**end) {
+               case '(':
+                       *start = ++*end;
+                       *sz = 2;
+                       break;
+               case '[':
+                       *start = ++*end;
+                       term = ']';
+                       break;
+               case '\'':
+                       *start = ++*end;
+                       term = '\'';
+                       break;
+               case '3':
+               case '2':
+               case '1':
+                       *sz = (*end)[-1] == 's' &&
+                           isdigit((unsigned char)(*end)[1]) ? 2 : 1;
+                       break;
+               default:
+                       *sz = 1;
+                       break;
+               }

 
 

-void *
-mandoc_malloc(size_t size)
-{
-       void            *ptr;
+               break;

 
 

-       ptr = malloc(size);
-       if (NULL == ptr) {
-               perror(NULL);
-               exit((int)MANDOCLEVEL_SYSERR);
+       /*
+        * Anything else is assumed to be a glyph.
+        * In this case, pass back the character after the backslash.
+        */
+       default:
+               gly = ESCAPE_SPECIAL;
+               *start = --*end;
+               *sz = 1;
+               break;

        }
 
        }
 

-       return(ptr);
-}
-
+       assert(ESCAPE_ERROR != gly);

 
 

-void *
-mandoc_realloc(void *ptr, size_t size)
-{
+       /*
+        * Read up to the terminating character,
+        * paying attention to nested escapes.
+        */

 
 

-       ptr = realloc(ptr, size);
-       if (NULL == ptr) {
-               perror(NULL);
-               exit((int)MANDOCLEVEL_SYSERR);
+       if ('\0' != term) {
+               while (**end != term) {
+                       switch (**end) {
+                       case '\0':
+                               return ESCAPE_ERROR;
+                       case '\\':
+                               (*end)++;
+                               if (ESCAPE_ERROR ==
+                                   mandoc_escape(end, NULL, NULL))
+                                       return ESCAPE_ERROR;
+                               break;
+                       default:
+                               (*end)++;
+                               break;
+                       }
+               }
+               *sz = (*end)++ - *start;
+       } else {
+               assert(*sz > 0);
+               if ((size_t)*sz > strlen(*start))
+                       return ESCAPE_ERROR;
+               *end += *sz;

        }
 
        }
 

-       return(ptr);
-}
+       /* Run post-processors. */

 
 

+       switch (gly) {
+       case ESCAPE_FONT:
+               if (*sz == 2) {
+                       if (**start == 'C') {
+                               if ((*start)[1] == 'W' ||
+                                   (*start)[1] == 'R') {
+                                       gly = ESCAPE_FONTCW;
+                                       break;
+                               }
+                               /*
+                                * Treat other constant-width font modes
+                                * just like regular font modes.
+                                */
+                               (*start)++;
+                               (*sz)--;
+                       } else {
+                               if ((*start)[0] == 'B' && (*start)[1] == 'I')
+                                       gly = ESCAPE_FONTBI;
+                               break;
+                       }
+               } else if (*sz != 1) {
+                       if (*sz == 0)
+                               gly = ESCAPE_FONTPREV;
+                       break;
+               }

 
 

-char *
-mandoc_strdup(const char *ptr)
-{
-       char            *p;
+               switch (**start) {
+               case '3':
+               case 'B':
+                       gly = ESCAPE_FONTBOLD;
+                       break;
+               case '2':
+               case 'I':
+                       gly = ESCAPE_FONTITALIC;
+                       break;
+               case 'P':
+                       gly = ESCAPE_FONTPREV;
+                       break;
+               case '1':
+               case 'R':
+                       gly = ESCAPE_FONTROMAN;
+                       break;
+               }
+               break;
+       case ESCAPE_SPECIAL:
+               if (**start == 'c') {
+                       if (*sz == 1) {
+                               gly = ESCAPE_NOSPACE;
+                               break;
+                       }
+                       if (*sz < 6 || *sz > 7 ||
+                           strncmp(*start, "char", 4) != 0 ||
+                           (int)strspn(*start + 4, "0123456789") + 4 < *sz)
+                               break;
+                       c = 0;
+                       for (i = 4; i < *sz; i++)
+                               c = 10 * c + ((*start)[i] - '0');
+                       if (c < 0x21 || (c > 0x7e && c < 0xa0) || c > 0xff)
+                               break;
+                       *start += 4;
+                       *sz -= 4;
+                       gly = ESCAPE_NUMBERED;
+                       break;
+               }

 
 

-       p = strdup(ptr);
-       if (NULL == p) {
-               perror(NULL);
-               exit((int)MANDOCLEVEL_SYSERR);
+               /*
+                * Unicode escapes are defined in groff as \[u0000]
+                * to \[u10FFFF], where the contained value must be
+                * a valid Unicode codepoint.  Here, however, only
+                * check the length and range.
+                */
+               if (**start != 'u' || *sz < 5 || *sz > 7)
+                       break;
+               if (*sz == 7 && ((*start)[1] != '1' || (*start)[2] != '0'))
+                       break;
+               if (*sz == 6 && (*start)[1] == '0')
+                       break;
+               if (*sz == 5 && (*start)[1] == 'D' &&
+                   strchr("89ABCDEF", (*start)[2]) != NULL)
+                       break;
+               if ((int)strspn(*start + 1, "0123456789ABCDEFabcdef")
+                   + 1 == *sz)
+                       gly = ESCAPE_UNICODE;
+               break;
+       default:
+               break;

        }
 
        }
 

-       return(p);
+       return gly;

 }
 
 /*
  * Parse a quoted or unquoted roff-style request or macro argument.
  * Return a pointer to the parsed argument, which is either the original
  * pointer or advanced by one byte in case the argument is quoted.
 }
 
 /*
  * Parse a quoted or unquoted roff-style request or macro argument.
  * Return a pointer to the parsed argument, which is either the original
  * pointer or advanced by one byte in case the argument is quoted.

- * Null-terminate the argument in place.
+ * NUL-terminate the argument in place.

  * Collapse pairs of quotes inside quoted arguments.
  * Advance the argument pointer to the next argument,
  * Collapse pairs of quotes inside quoted arguments.
  * Advance the argument pointer to the next argument,

- * or to the null byte terminating the argument line.
+ * or to the NUL byte terminating the argument line.

  */
 char *
 mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
  */
 char *
 mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)


@@ -303,26 +408,44 @@ mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
 
        /* Quoting can only start with a new word. */
        start = *cpp;
 
        /* Quoting can only start with a new word. */
        start = *cpp;

+       quoted = 0;

        if ('"' == *start) {
                quoted = 1;
                start++;
        if ('"' == *start) {
                quoted = 1;
                start++;

-       } else
-               quoted = 0;
+       }

 
        pairs = 0;
        white = 0;
        for (cp = start; '\0' != *cp; cp++) {
 
        pairs = 0;
        white = 0;
        for (cp = start; '\0' != *cp; cp++) {

-               /* Move left after quoted quotes and escaped backslashes. */
+
+               /*
+                * Move the following text left
+                * after quoted quotes and after "\\" and "\t".
+                */

                if (pairs)
                        cp[-pairs] = cp[0];
                if (pairs)
                        cp[-pairs] = cp[0];

+

                if ('\\' == cp[0]) {
                if ('\\' == cp[0]) {

-                       if ('\\' == cp[1]) {
-                               /* Poor man's copy mode. */
+                       /*
+                        * In copy mode, translate double to single
+                        * backslashes and backslash-t to literal tabs.
+                        */
+                       switch (cp[1]) {
+                       case 't':
+                               cp[0] = '\t';
+                               /* FALLTHROUGH */
+                       case '\\':

                                pairs++;
                                cp++;
                                pairs++;
                                cp++;

-                       } else if (0 == quoted && ' ' == cp[1])
+                               break;
+                       case ' ':

                                /* Skip escaped blanks. */
                                /* Skip escaped blanks. */

-                               cp++;
+                               if (0 == quoted)
+                                       cp++;
+                               break;
+                       default:
+                               break;
+                       }

                } else if (0 == quoted) {
                        if (' ' == cp[0]) {
                                /* Unescaped blanks end unquoted args. */
                } else if (0 == quoted) {
                        if (' ' == cp[0]) {
                                /* Unescaped blanks end unquoted args. */


@@ -344,9 +467,9 @@ mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
 
        /* Quoted argument without a closing quote. */
        if (1 == quoted)
 
        /* Quoted argument without a closing quote. */
        if (1 == quoted)

-               mandoc_msg(MANDOCERR_BADQUOTE, parse, ln, *pos, NULL);
+               mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL);

 
 

-       /* Null-terminate this argument and move to the next one. */
+       /* NUL-terminate this argument and move to the next one. */

        if (pairs)
                cp[-pairs] = '\0';
        if ('\0' != *cp) {
        if (pairs)
                cp[-pairs] = '\0';
        if ('\0' != *cp) {


@@ -358,9 +481,9 @@ mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
        *cpp = cp;
 
        if ('\0' == *cp && (white || ' ' == cp[-1]))
        *cpp = cp;
 
        if ('\0' == *cp && (white || ' ' == cp[-1]))

-               mandoc_msg(MANDOCERR_EOLNSPACE, parse, ln, *pos, NULL);
+               mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL);

 
 

-       return(start);
+       return start;

 }
 
 static int
 }
 
 static int


@@ -371,24 +494,29 @@ a2time(time_t *t, const char *fmt, const char *p)
 
        memset(&tm, 0, sizeof(struct tm));
 
 
        memset(&tm, 0, sizeof(struct tm));
 

+       pp = NULL;
+#if HAVE_STRPTIME

        pp = strptime(p, fmt, &tm);
        pp = strptime(p, fmt, &tm);

+#endif

        if (NULL != pp && '\0' == *pp) {
                *t = mktime(&tm);
        if (NULL != pp && '\0' == *pp) {
                *t = mktime(&tm);

-               return(1);
+               return 1;

        }
 
        }
 

-       return(0);
+       return 0;

 }
 
 static char *
 time2a(time_t t)
 {
 }
 
 static char *
 time2a(time_t t)
 {

-       struct tm        tm;
+       struct tm       *tm;

        char            *buf, *p;
        size_t           ssz;
        int              isz;
 
        char            *buf, *p;
        size_t           ssz;
        int              isz;
 

-       localtime_r(&t, &tm);
+       tm = localtime(&t);
+       if (tm == NULL)
+               return NULL;

 
        /*
         * Reserve space:
 
        /*
         * Reserve space:


@@ -396,163 +524,143 @@ time2a(time_t t)
         * up to 2 characters for the day + comma + blank
         * 4 characters for the year and a terminating '\0'
         */
         * up to 2 characters for the day + comma + blank
         * 4 characters for the year and a terminating '\0'
         */

+

        p = buf = mandoc_malloc(10 + 4 + 4 + 1);
 
        p = buf = mandoc_malloc(10 + 4 + 4 + 1);
 

-       if (0 == (ssz = strftime(p, 10 + 1, "%B ", &tm)))
+       if ((ssz = strftime(p, 10 + 1, "%B ", tm)) == 0)

                goto fail;
        p += (int)ssz;
 
                goto fail;
        p += (int)ssz;
 

-       if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm.tm_mday)))
+       /*
+        * The output format is just "%d" here, not "%2d" or "%02d".
+        * That's also the reason why we can't just format the
+        * date as a whole with "%B %e, %Y" or "%B %d, %Y".
+        * Besides, the present approach is less prone to buffer
+        * overflows, in case anybody should ever introduce the bug
+        * of looking at LC_TIME.
+        */
+
+       if ((isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)) == -1)

                goto fail;
        p += isz;
 
                goto fail;
        p += isz;
 

-       if (0 == strftime(p, 4 + 1, "%Y", &tm))
+       if (strftime(p, 4 + 1, "%Y", tm) == 0)

                goto fail;
                goto fail;

-       return(buf);
+       return buf;

 
 fail:
        free(buf);
 
 fail:
        free(buf);

-       return(NULL);
+       return NULL;

 }
 
 char *
 }
 
 char *

-mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
+mandoc_normdate(struct roff_man *man, char *in, int ln, int pos)

 {
 {

-       char            *out;
+       char            *cp;

        time_t           t;
 
        time_t           t;
 

-       if (NULL == in || '\0' == *in ||
-           0 == strcmp(in, "$" "Mdocdate$")) {
-               mandoc_msg(MANDOCERR_NODATE, parse, ln, pos, NULL);
-               time(&t);
+       /* No date specified: use today's date. */
+
+       if (in == NULL || *in == '\0' || strcmp(in, "$" "Mdocdate$") == 0) {
+               mandoc_msg(MANDOCERR_DATE_MISSING, man->parse, ln, pos, NULL);
+               return time2a(time(NULL));

        }
        }

-       else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
-           !a2time(&t, "%b %d, %Y", in) &&
-           !a2time(&t, "%Y-%m-%d", in)) {
-               mandoc_msg(MANDOCERR_BADDATE, parse, ln, pos, NULL);
-               t = 0;
+
+       /* Valid mdoc(7) date format. */
+
+       if (a2time(&t, "$" "Mdocdate: %b %d %Y $", in) ||
+           a2time(&t, "%b %d, %Y", in)) {
+               cp = time2a(t);
+               if (t > time(NULL) + 86400)
+                       mandoc_msg(MANDOCERR_DATE_FUTURE, man->parse,
+                           ln, pos, cp);
+               else if (*in != '$' && strcmp(in, cp) != 0)
+                       mandoc_msg(MANDOCERR_DATE_NORM, man->parse,
+                           ln, pos, cp);
+               return cp;

        }
        }

-       out = t ? time2a(t) : NULL;
-       return(out ? out : mandoc_strdup(in));
+
+       /* In man(7), do not warn about the legacy format. */
+
+       if (a2time(&t, "%Y-%m-%d", in) == 0)
+               mandoc_msg(MANDOCERR_DATE_BAD, man->parse, ln, pos, in);
+       else if (t > time(NULL) + 86400)
+               mandoc_msg(MANDOCERR_DATE_FUTURE, man->parse, ln, pos, in);
+       else if (man->macroset == MACROSET_MDOC)
+               mandoc_vmsg(MANDOCERR_DATE_LEGACY, man->parse,
+                   ln, pos, "Dd %s", in);
+
+       /* Use any non-mdoc(7) date verbatim. */
+
+       return mandoc_strdup(in);

 }
 
 int
 }
 
 int

-mandoc_eos(const char *p, size_t sz, int enclosed)
+mandoc_eos(const char *p, size_t sz)

 {
 {

-       const char *q;
-       int found;
+       const char      *q;
+       int              enclosed, found;

 
        if (0 == sz)
 
        if (0 == sz)

-               return(0);
+               return 0;

 
        /*
         * End-of-sentence recognition must include situations where
         * some symbols, such as `)', allow prior EOS punctuation to
 
        /*
         * End-of-sentence recognition must include situations where
         * some symbols, such as `)', allow prior EOS punctuation to

-        * propogate outward.
+        * propagate outward.

         */
 
         */
 

-       found = 0;
+       enclosed = found = 0;

        for (q = p + (int)sz - 1; q >= p; q--) {
                switch (*q) {
        for (q = p + (int)sz - 1; q >= p; q--) {
                switch (*q) {

-               case ('\"'):
-                       /* FALLTHROUGH */
-               case ('\''):
-                       /* FALLTHROUGH */
-               case (']'):
-                       /* FALLTHROUGH */
-               case (')'):
+               case '\"':
+               case '\'':
+               case ']':
+               case ')':

                        if (0 == found)
                                enclosed = 1;
                        break;
                        if (0 == found)
                                enclosed = 1;
                        break;

-               case ('.'):
-                       /* FALLTHROUGH */
-               case ('!'):
-                       /* FALLTHROUGH */
-               case ('?'):
+               case '.':
+               case '!':
+               case '?':

                        found = 1;
                        break;
                default:
                        found = 1;
                        break;
                default:

-                       return(found && (!enclosed || isalnum((unsigned char)*q)));
+                       return found &&
+                           (!enclosed || isalnum((unsigned char)*q));

                }
        }
 
                }
        }
 

-       return(found && !enclosed);
+       return found && !enclosed;

 }
 
 }
 

+/*
+ * Convert a string to a long that may not be <0.
+ * If the string is invalid, or is less than 0, return -1.
+ */

 int
 int

-mandoc_hyph(const char *start, const char *c)
+mandoc_strntoi(const char *p, size_t sz, int base)

 {
 {

+       char             buf[32];
+       char            *ep;
+       long             v;

 
 

-       /*
-        * Choose whether to break at a hyphenated character.  We only
-        * do this if it's free-standing within a word.
-        */
+       if (sz > 31)
+               return -1;

 
 

-       /* Skip first/last character of buffer. */
-       if (c == start || '\0' == *(c + 1))
-               return(0);
-       /* Skip first/last character of word. */
-       if ('\t' == *(c + 1) || '\t' == *(c - 1))
-               return(0);
-       if (' ' == *(c + 1) || ' ' == *(c - 1))
-               return(0);
-       /* Skip double invocations. */
-       if ('-' == *(c + 1) || '-' == *(c - 1))
-               return(0);
-       /* Skip escapes. */
-       if ('\\' == *(c - 1))
-               return(0);
-
-       return(1);
-}
+       memcpy(buf, p, sz);
+       buf[(int)sz] = '\0';

 
 

-/*
- * Check if a string is a punctuation delimiter.  This only applies to
- * mdoc(7) documents, but as it's used in both front-ends and back-ends,
- * it needs to go here (instead of, say, in libmdoc.h).
- */
-enum mdelim
-mandoc_isdelim(const char *p)
-{
-
-       if ('\0' == p[0])
-               return(DELIM_NONE);
-
-       if ('\0' == p[1])
-               switch (p[0]) {
-               case('('):
-                       /* FALLTHROUGH */
-               case('['):
-                       return(DELIM_OPEN);
-               case('|'):
-                       return(DELIM_MIDDLE);
-               case('.'):
-                       /* FALLTHROUGH */
-               case(','):
-                       /* FALLTHROUGH */
-               case(';'):
-                       /* FALLTHROUGH */
-               case(':'):
-                       /* FALLTHROUGH */
-               case('?'):
-                       /* FALLTHROUGH */
-               case('!'):
-                       /* FALLTHROUGH */
-               case(')'):
-                       /* FALLTHROUGH */
-               case(']'):
-                       return(DELIM_CLOSE);
-               default:
-                       return(DELIM_NONE);
-               }
+       errno = 0;
+       v = strtol(buf, &ep, base);

 
 

-       if ('\\' != p[0])
-               return(DELIM_NONE);
+       if (buf[0] == '\0' || *ep != '\0')
+               return -1;

 
 

-       if (0 == strcmp(p + 1, "."))
-               return(DELIM_CLOSE);
-       if (0 == strcmp(p + 1, "*(Ba"))
-               return(DELIM_MIDDLE);
+       if (v > INT_MAX)
+               v = INT_MAX;
+       if (v < INT_MIN)
+               v = INT_MIN;

 
 

-       return(DELIM_NONE);
+       return (int)v;

 }
 }