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libmdoc.h
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main.c
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mandoc_char.7
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mandoc_xr.h
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mandocd.8
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mandocd.c
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mansearch.h
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mchars_alloc.3
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mdoc.7
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mdoc.h
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roff.c
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term.c
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term.h
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term_ascii.c
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term_ps.c
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term_tab.c
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test-EFTYPE.c
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test-O_DIRECTORY.c
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test-PATH_MAX.c
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test-be32toh.c
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test-cmsg.c
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test-dirent-namlen.c
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test-err.c
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test-fgetln.c
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test-fts.c
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test-getline.c
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test-isblank.c
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test-mkdtemp.c
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test-nanosleep.c
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test-noop.c
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test-ntohl.c
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test-ohash.c
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test-pledge.c
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test-progname.c
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test-reallocarray.c
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test-recallocarray.c
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test-recvmsg.c
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test-rewb-bsd.c
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test-rewb-sysv.c
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test-sandbox_init.c
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test-strcasestr.c
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test-stringlist.c
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test-strlcat.c
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test-strlcpy.c
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test-strndup.c
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test-strptime.c
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test-strsep.c
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test-strtonum.c
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test-vasprintf.c
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test-wchar.c
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tree.c
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Editing: mandoc.c
/* $Id: mandoc.c,v 1.116 2019/06/27 15:07:30 schwarze Exp $ */ /* * 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 AUTHORS DISCLAIM ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * 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" static int a2time(time_t *, const char *, const char *); static char *time2a(time_t); enum mandoc_esc mandoc_font(const char *cp, int sz) { 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; } } 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; 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; } 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: 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; } /* 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; } /* * 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; } static int a2time(time_t *t, const char *fmt, const char *p) { struct tm tm; char *pp; 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 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' */ 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) { char *cp; time_t t; 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; } /* 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); } int mandoc_eos(const char *p, size_t sz) { const char *q; int enclosed, found; if (0 == sz) return 0; /* * 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 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 mandoc_strntoi(const char *p, size_t sz, int base) { char buf[32]; char *ep; long v; if (sz > 31) return -1; memcpy(buf, p, sz); buf[(int)sz] = '\0'; errno = 0; v = strtol(buf, &ep, base); if (buf[0] == '\0' || *ep != '\0') return -1; if (v > INT_MAX) v = INT_MAX; if (v < INT_MIN) v = INT_MIN; return (int)v; }
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