-/* $Id: mandoc.c,v 1.4 2009/10/28 19:21:59 kristaps Exp $ */
+/* $Id: mandoc.c,v 1.116 2019/06/27 15:07:30 schwarze Exp $ */
/*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * 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
* copyright notice and this permission notice appear in all copies.
*
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#include "config.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 "mandoc_aux.h"
+#include "mandoc.h"
+#include "roff.h"
#include "libmandoc.h"
+#include "roff_int.h"
-int
-mandoc_special(const char *p)
+static int a2time(time_t *, const char *, const char *);
+static char *time2a(time_t);
+
+
+enum mandoc_esc
+mandoc_font(const char *cp, int sz)
{
- int c;
-
- if ('\\' != *p++)
- return(0);
+ switch (sz) {
+ case 0:
+ return ESCAPE_FONTPREV;
+ case 1:
+ switch (cp[0]) {
+ case 'B':
+ case '3':
+ return ESCAPE_FONTBOLD;
+ case 'I':
+ case '2':
+ return ESCAPE_FONTITALIC;
+ case 'P':
+ return ESCAPE_FONTPREV;
+ case 'R':
+ case '1':
+ return ESCAPE_FONTROMAN;
+ case '4':
+ return ESCAPE_FONTBI;
+ default:
+ return ESCAPE_ERROR;
+ }
+ case 2:
+ switch (cp[0]) {
+ case 'B':
+ switch (cp[1]) {
+ case 'I':
+ return ESCAPE_FONTBI;
+ default:
+ return ESCAPE_ERROR;
+ }
+ case 'C':
+ switch (cp[1]) {
+ case 'B':
+ return ESCAPE_FONTBOLD;
+ case 'I':
+ return ESCAPE_FONTITALIC;
+ case 'R':
+ case 'W':
+ return ESCAPE_FONTCW;
+ default:
+ return ESCAPE_ERROR;
+ }
+ default:
+ return ESCAPE_ERROR;
+ }
+ default:
+ return ESCAPE_ERROR;
+ }
+}
- switch (*p) {
- case ('\\'):
- /* FALLTHROUGH */
- case ('\''):
- /* FALLTHROUGH */
- case ('`'):
- /* FALLTHROUGH */
- case ('q'):
- /* FALLTHROUGH */
- case ('-'):
- /* FALLTHROUGH */
- case ('~'):
- /* FALLTHROUGH */
- case ('^'):
- /* FALLTHROUGH */
- case ('%'):
- /* FALLTHROUGH */
- case ('0'):
- /* FALLTHROUGH */
- case (' '):
- /* FALLTHROUGH */
- case ('|'):
- /* FALLTHROUGH */
- case ('&'):
- /* FALLTHROUGH */
- case ('.'):
- /* FALLTHROUGH */
- case (':'):
- /* FALLTHROUGH */
- case ('c'):
- return(2);
- case ('e'):
- return(2);
- case ('f'):
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- return(3);
- case ('*'):
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- switch (*p) {
- case ('('):
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- return(4);
- case ('['):
- for (c = 3, p++; *p && ']' != *p; p++, c++)
- if ( ! isgraph((u_char)*p))
+enum mandoc_esc
+mandoc_escape(const char **end, const char **start, int *sz)
+{
+ const char *local_start;
+ int local_sz, c, i;
+ char term;
+ enum mandoc_esc gly;
+
+ /*
+ * When the caller doesn't provide return storage,
+ * use local storage.
+ */
+
+ if (NULL == start)
+ start = &local_start;
+ if (NULL == sz)
+ sz = &local_sz;
+
+ /*
+ * Treat "\E" just like "\";
+ * it only makes a difference in copy mode.
+ */
+
+ if (**end == 'E')
+ ++*end;
+
+ /*
+ * 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.
+ */
+
+ gly = ESCAPE_ERROR;
+ *start = ++*end;
+ *sz = 0;
+ term = '\0';
+
+ 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 '[':
+ if (**start == ' ') {
+ ++*end;
+ return ESCAPE_ERROR;
+ }
+ gly = ESCAPE_SPECIAL;
+ term = ']';
+ break;
+ case 'C':
+ if ('\'' != **start)
+ return ESCAPE_ERROR;
+ *start = ++*end;
+ gly = ESCAPE_SPECIAL;
+ term = '\'';
+ break;
+
+ /*
+ * Escapes taking no arguments at all.
+ */
+ case '!':
+ case '?':
+ return ESCAPE_UNSUPP;
+ case '%':
+ case '&':
+ case ')':
+ case ',':
+ case '/':
+ case '^':
+ case 'a':
+ case 'd':
+ case 'r':
+ case 't':
+ case 'u':
+ case '{':
+ case '|':
+ case '}':
+ return ESCAPE_IGNORE;
+ case 'c':
+ return ESCAPE_NOSPACE;
+ case 'p':
+ return ESCAPE_BREAK;
+
+ /*
+ * 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 'f':
+ case 'g':
+ case 'k':
+ case 'M':
+ case 'm':
+ case 'n':
+ case 'O':
+ case 'V':
+ case 'Y':
+ gly = (*start)[-1] == 'f' ? ESCAPE_FONT : ESCAPE_IGNORE;
+ switch (**start) {
+ case '(':
+ if ((*start)[-1] == 'O')
+ gly = ESCAPE_ERROR;
+ *start = ++*end;
+ *sz = 2;
+ break;
+ case '[':
+ if ((*start)[-1] == 'O')
+ gly = (*start)[1] == '5' ?
+ ESCAPE_UNSUPP : ESCAPE_ERROR;
+ *start = ++*end;
+ term = ']';
+ break;
+ default:
+ if ((*start)[-1] == 'O') {
+ switch (**start) {
+ case '0':
+ gly = ESCAPE_UNSUPP;
+ break;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
break;
- return(*p == ']' ? c : 0);
+ default:
+ gly = ESCAPE_ERROR;
+ break;
+ }
+ }
+ *sz = 1;
+ break;
+ }
+ break;
+ case '*':
+ if (strncmp(*start, "(.T", 3) != 0)
+ abort();
+ gly = ESCAPE_DEVICE;
+ *start = ++*end;
+ *sz = 2;
+ break;
+
+ /*
+ * 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;
+
+ /*
+ * 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;
+ }
+ switch ((*start)[-1]) {
+ case 'h':
+ gly = ESCAPE_HORIZ;
+ break;
+ case 'l':
+ gly = ESCAPE_HLINE;
+ break;
+ default:
+ gly = ESCAPE_IGNORE;
+ break;
+ }
+ term = **start;
+ *start = ++*end;
+ break;
+
+ /*
+ * 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;
+
+ /*
+ * Sizes get a special category of their own.
+ */
+ case 's':
+ gly = ESCAPE_IGNORE;
+
+ /* 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;
}
- return(3);
- case ('('):
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- if (0 == *++p || ! isgraph((u_char)*p))
- return(0);
- return(4);
- case ('['):
+
break;
+
+ /*
+ * Several special characters can be encoded as
+ * one-byte escape sequences without using \[].
+ */
+ case ' ':
+ case '\'':
+ case '-':
+ case '.':
+ case '0':
+ case ':':
+ case '_':
+ case '`':
+ case 'e':
+ case '~':
+ gly = ESCAPE_SPECIAL;
+ /* FALLTHROUGH */
default:
- return(0);
+ if (gly == ESCAPE_ERROR)
+ gly = ESCAPE_UNDEF;
+ *start = --*end;
+ *sz = 1;
+ break;
+ }
+
+ /*
+ * Read up to the terminating character,
+ * paying attention to nested escapes.
+ */
+
+ 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;
+
+ /*
+ * The file chars.c only provides one common list
+ * of character names, but \[-] == \- is the only
+ * one of the characters with one-byte names that
+ * allows enclosing the name in brackets.
+ */
+ if (gly == ESCAPE_SPECIAL && *sz == 1 && **start != '-')
+ return ESCAPE_ERROR;
+ } else {
+ assert(*sz > 0);
+ if ((size_t)*sz > strlen(*start))
+ return ESCAPE_ERROR;
+ *end += *sz;
}
- for (c = 3, p++; *p && ']' != *p; p++, c++)
- if ( ! isgraph((u_char)*p))
+ /* Run post-processors. */
+
+ switch (gly) {
+ case ESCAPE_FONT:
+ gly = mandoc_font(*start, *sz);
+ break;
+ case ESCAPE_SPECIAL:
+ if (**start == 'c') {
+ 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;
+ }
- return(*p == ']' ? c : 0);
-}
+ /*
+ * 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 gly;
+}
-void *
-mandoc_calloc(size_t num, size_t size)
+static int
+a2time(time_t *t, const char *fmt, const char *p)
{
- void *ptr;
+ struct tm tm;
+ char *pp;
- ptr = calloc(num, size);
- if (NULL == ptr) {
- fprintf(stderr, "memory exhausted\n");
- exit(EXIT_FAILURE);
+ memset(&tm, 0, sizeof(struct tm));
+
+ pp = NULL;
+#if HAVE_STRPTIME
+ pp = strptime(p, fmt, &tm);
+#endif
+ if (NULL != pp && '\0' == *pp) {
+ *t = mktime(&tm);
+ return 1;
}
- return(ptr);
+ return 0;
}
+static char *
+time2a(time_t t)
+{
+ struct tm *tm;
+ char *buf, *p;
+ size_t ssz;
+ int isz;
+
+ buf = NULL;
+ tm = localtime(&t);
+ if (tm == NULL)
+ goto fail;
+
+ /*
+ * Reserve space:
+ * up to 9 characters for the month (September) + blank
+ * up to 2 characters for the day + comma + blank
+ * 4 characters for the year and a terminating '\0'
+ */
-void *
-mandoc_malloc(size_t size)
+ p = buf = mandoc_malloc(10 + 4 + 4 + 1);
+
+ if ((ssz = strftime(p, 10 + 1, "%B ", tm)) == 0)
+ goto fail;
+ p += (int)ssz;
+
+ /*
+ * 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.
+ */
+
+ isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday);
+ if (isz < 0 || isz > 4)
+ goto fail;
+ p += isz;
+
+ if (strftime(p, 4 + 1, "%Y", tm) == 0)
+ goto fail;
+ return buf;
+
+fail:
+ free(buf);
+ return mandoc_strdup("");
+}
+
+char *
+mandoc_normdate(struct roff_man *man, char *in, int ln, int pos)
{
- void *ptr;
+ char *cp;
+ time_t t;
- ptr = malloc(size);
- if (NULL == ptr) {
- fprintf(stderr, "memory exhausted\n");
- exit(EXIT_FAILURE);
+ if (man->quick)
+ return mandoc_strdup(in == NULL ? "" : in);
+
+ /* No date specified: use today's date. */
+
+ if (in == NULL || *in == '\0')
+ mandoc_msg(MANDOCERR_DATE_MISSING, ln, pos, NULL);
+ if (in == NULL || *in == '\0' || strcmp(in, "$" "Mdocdate$") == 0)
+ return time2a(time(NULL));
+
+ /* Valid mdoc(7) date format. */
+
+ if (a2time(&t, "$" "Mdocdate: %b %d %Y $", in) ||
+ a2time(&t, "%b %d, %Y", in)) {
+ cp = time2a(t);
+ if (t > time(NULL) + 86400)
+ mandoc_msg(MANDOCERR_DATE_FUTURE, ln, pos, "%s", cp);
+ else if (*in != '$' && strcmp(in, cp) != 0)
+ mandoc_msg(MANDOCERR_DATE_NORM, ln, pos, "%s", cp);
+ return cp;
}
- return(ptr);
-}
+ /* In man(7), do not warn about the legacy format. */
+
+ if (a2time(&t, "%Y-%m-%d", in) == 0)
+ mandoc_msg(MANDOCERR_DATE_BAD, ln, pos, "%s", in);
+ else if (t > time(NULL) + 86400)
+ mandoc_msg(MANDOCERR_DATE_FUTURE, ln, pos, "%s", in);
+ else if (man->meta.macroset == MACROSET_MDOC)
+ mandoc_msg(MANDOCERR_DATE_LEGACY, ln, pos, "Dd %s", in);
+ /* Use any non-mdoc(7) date verbatim. */
+
+ return mandoc_strdup(in);
+}
-void *
-mandoc_realloc(void *ptr, size_t size)
+int
+mandoc_eos(const char *p, size_t sz)
{
+ const char *q;
+ int enclosed, found;
+
+ if (0 == sz)
+ return 0;
- ptr = realloc(ptr, size);
- if (NULL == ptr) {
- fprintf(stderr, "memory exhausted\n");
- exit(EXIT_FAILURE);
+ /*
+ * End-of-sentence recognition must include situations where
+ * some symbols, such as `)', allow prior EOS punctuation to
+ * propagate outward.
+ */
+
+ enclosed = found = 0;
+ for (q = p + (int)sz - 1; q >= p; q--) {
+ switch (*q) {
+ case '\"':
+ case '\'':
+ case ']':
+ case ')':
+ if (0 == found)
+ enclosed = 1;
+ break;
+ case '.':
+ case '!':
+ case '?':
+ found = 1;
+ break;
+ default:
+ return found &&
+ (!enclosed || isalnum((unsigned char)*q));
+ }
}
- return(ptr);
+ return found && !enclosed;
}
-
-void *
-mandoc_reallocf(void *old_ptr, size_t size) /* FIXME: remove (not used) */
+/*
+ * Convert a string to a long that may not be <0.
+ * If the string is invalid, or is less than 0, return -1.
+ */
+int
+mandoc_strntoi(const char *p, size_t sz, int base)
{
- void *ptr;
+ char buf[32];
+ char *ep;
+ long v;
- ptr = realloc(old_ptr, size);
- if (NULL == ptr)
- free(old_ptr);
+ if (sz > 31)
+ return -1;
- return(ptr);
-}
+ memcpy(buf, p, sz);
+ buf[(int)sz] = '\0';
+ errno = 0;
+ v = strtol(buf, &ep, base);
-char *
-mandoc_strdup(const char *ptr)
-{
- char *p;
+ if (buf[0] == '\0' || *ep != '\0')
+ return -1;
- p = strdup(ptr);
- if (NULL == p) {
- fprintf(stderr, "memory exhausted\n");
- exit(EXIT_FAILURE);
- }
+ if (v > INT_MAX)
+ v = INT_MAX;
+ if (v < INT_MIN)
+ v = INT_MIN;
- return(p);
+ return (int)v;
}
git.ckatri.com / mandoc.git / blobdiff