=================================================================== RCS file: /cvs/mandoc/mandoc.c,v retrieving revision 1.105 retrieving revision 1.121 diff -u -p -r1.105 -r1.121 --- mandoc/mandoc.c 2018/08/10 22:12:44 1.105 +++ mandoc/mandoc.c 2022/05/19 15:37:47 1.121 @@ -1,7 +1,8 @@ -/* $Id: mandoc.c,v 1.105 2018/08/10 22:12:44 schwarze Exp $ */ +/* $Id: mandoc.c,v 1.121 2022/05/19 15:37:47 schwarze Exp $ */ /* - * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons - * Copyright (c) 2011-2015, 2017, 2018 Ingo Schwarze + * Copyright (c) 2010, 2011, 2015, 2017, 2018, 2019, 2020, 2021 + * Ingo Schwarze + * Copyright (c) 2009, 2010 Kristaps Dzonsons * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above @@ -14,6 +15,11 @@ * 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. + * + * Utility functions to handle end of sentence punctuation + * and dates and times, for use by mdoc(7) and man(7) parsers. + * Utility functions to handle fonts and numbers, + * for use by mandoc(1) parsers and formatters. */ #include "config.h" @@ -32,445 +38,65 @@ #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_escape(const char **end, const char **start, int *sz) +mandoc_font(const char *cp, 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; - - /* - * 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 '[': - 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 'd': - case 'u': - case ',': - case '/': - return ESCAPE_IGNORE; - 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 'g': - case 'k': - case 'M': - case 'm': - case 'n': - case 'V': - case 'Y': - gly = ESCAPE_IGNORE; - /* FALLTHROUGH */ - case 'f': - if (ESCAPE_ERROR == gly) - gly = ESCAPE_FONT; - switch (**start) { - case '(': - *start = ++*end; - *sz = 2; - break; - case '[': - *start = ++*end; - term = ']'; - break; - default: - *sz = 1; - break; - } - 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; + 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': - *sz = (*end)[-1] == 's' && - isdigit((unsigned char)(*end)[1]) ? 2 : 1; - break; + return ESCAPE_FONTROMAN; + case '4': + return ESCAPE_FONTBI; default: - *sz = 1; - break; + return ESCAPE_ERROR; } - - break; - - /* - * 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; - } - - assert(ESCAPE_ERROR != gly); - - /* - * Read up to the terminating character, - * paying attention to nested escapes. - */ - - if ('\0' != term) { - while (**end != term) { - switch (**end) { - case '\0': + case 2: + switch (cp[0]) { + case 'B': + switch (cp[1]) { + case 'I': + return ESCAPE_FONTBI; + default: return ESCAPE_ERROR; - case '\\': - (*end)++; - if (ESCAPE_ERROR == - mandoc_escape(end, NULL, NULL)) - return ESCAPE_ERROR; - break; + } + case 'C': + switch (cp[1]) { + case 'B': + return ESCAPE_FONTCB; + case 'I': + return ESCAPE_FONTCI; + case 'R': + case 'W': + return ESCAPE_FONTCR; default: - (*end)++; - break; + return ESCAPE_ERROR; } - } - *sz = (*end)++ - *start; - } else { - assert(*sz > 0); - if ((size_t)*sz > strlen(*start)) + default: return ESCAPE_ERROR; - *end += *sz; - } - - /* Run post-processors. */ - - switch (gly) { - case ESCAPE_FONT: - if (2 == *sz) { - if ('C' == **start) { - /* - * Treat constant-width font modes - * just like regular font modes. - */ - (*start)++; - (*sz)--; - } else { - if ('B' == (*start)[0] && 'I' == (*start)[1]) - gly = ESCAPE_FONTBI; - break; - } - } else if (1 != *sz) - break; - - 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; - } - - /* - * 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 ESCAPE_ERROR; } - - 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. - * NUL-terminate the argument in place. - * Collapse pairs of quotes inside quoted arguments. - * Advance the argument pointer to the next argument, - * or to the NUL byte terminating the argument line. - */ -char * -mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos) -{ - char *start, *cp; - int quoted, pairs, white; - - /* Quoting can only start with a new word. */ - start = *cpp; - quoted = 0; - if ('"' == *start) { - quoted = 1; - start++; - } - - pairs = 0; - white = 0; - for (cp = start; '\0' != *cp; cp++) { - - /* - * Move the following text left - * after quoted quotes and after "\\" and "\t". - */ - if (pairs) - cp[-pairs] = cp[0]; - - if ('\\' == cp[0]) { - /* - * 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++; - break; - case ' ': - /* Skip escaped blanks. */ - if (0 == quoted) - cp++; - break; - default: - break; - } - } else if (0 == quoted) { - if (' ' == cp[0]) { - /* Unescaped blanks end unquoted args. */ - white = 1; - break; - } - } else if ('"' == cp[0]) { - if ('"' == cp[1]) { - /* Quoted quotes collapse. */ - pairs++; - cp++; - } else { - /* Unquoted quotes end quoted args. */ - quoted = 2; - break; - } - } - } - - /* Quoted argument without a closing quote. */ - if (1 == quoted) - mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL); - - /* NUL-terminate this argument and move to the next one. */ - if (pairs) - cp[-pairs] = '\0'; - if ('\0' != *cp) { - *cp++ = '\0'; - while (' ' == *cp) - cp++; - } - *pos += (int)(cp - start) + (quoted ? 1 : 0); - *cpp = cp; - - if ('\0' == *cp && (white || ' ' == cp[-1])) - mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL); - - return start; -} - static int a2time(time_t *t, const char *fmt, const char *p) { @@ -499,9 +125,10 @@ time2a(time_t t) size_t ssz; int isz; + buf = NULL; tm = localtime(&t); if (tm == NULL) - return NULL; + goto fail; /* * Reserve space: @@ -525,7 +152,8 @@ time2a(time_t t) * of looking at LC_TIME. */ - if ((isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)) == -1) + isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday); + if (isz < 0 || isz > 4) goto fail; p += isz; @@ -535,49 +163,63 @@ time2a(time_t t) fail: free(buf); - return NULL; + return mandoc_strdup(""); } char * -mandoc_normdate(struct roff_man *man, char *in, int ln, int pos) +mandoc_normdate(struct roff_node *nch, struct roff_node *nbl) { char *cp; time_t t; - /* No date specified: use today's date. */ + /* No date specified. */ - if (in == NULL || *in == '\0' || strcmp(in, "$" "Mdocdate$") == 0) { - mandoc_msg(MANDOCERR_DATE_MISSING, man->parse, ln, pos, NULL); - return time2a(time(NULL)); + if (nch == NULL) { + if (nbl == NULL) + mandoc_msg(MANDOCERR_DATE_MISSING, 0, 0, NULL); + else + mandoc_msg(MANDOCERR_DATE_MISSING, nbl->line, + nbl->pos, "%s", roff_name[nbl->tok]); + return mandoc_strdup(""); } + if (*nch->string == '\0') { + mandoc_msg(MANDOCERR_DATE_MISSING, nch->line, + nch->pos, "%s", roff_name[nbl->tok]); + return mandoc_strdup(""); + } + if (strcmp(nch->string, "$" "Mdocdate$") == 0) + return time2a(time(NULL)); /* Valid mdoc(7) date format. */ - if (a2time(&t, "$" "Mdocdate: %b %d %Y $", in) || - a2time(&t, "%b %d, %Y", in)) { + if (a2time(&t, "$" "Mdocdate: %b %d %Y $", nch->string) || + a2time(&t, "%b %d, %Y", nch->string)) { cp = time2a(t); if (t > time(NULL) + 86400) - mandoc_msg(MANDOCERR_DATE_FUTURE, man->parse, - ln, pos, cp); - else if (*in != '$' && strcmp(in, cp) != 0) - mandoc_msg(MANDOCERR_DATE_NORM, man->parse, - ln, pos, cp); + mandoc_msg(MANDOCERR_DATE_FUTURE, nch->line, + nch->pos, "%s %s", roff_name[nbl->tok], cp); + else if (*nch->string != '$' && + strcmp(nch->string, cp) != 0) + mandoc_msg(MANDOCERR_DATE_NORM, nch->line, + nch->pos, "%s %s", roff_name[nbl->tok], 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, man->parse, ln, pos, in); + if (a2time(&t, "%Y-%m-%d", nch->string) == 0) + mandoc_msg(MANDOCERR_DATE_BAD, nch->line, nch->pos, + "%s %s", roff_name[nbl->tok], nch->string); 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); + mandoc_msg(MANDOCERR_DATE_FUTURE, nch->line, nch->pos, + "%s %s", roff_name[nbl->tok], nch->string); + else if (nbl->tok == MDOC_Dd) + mandoc_msg(MANDOCERR_DATE_LEGACY, nch->line, nch->pos, + "Dd %s", nch->string); /* Use any non-mdoc(7) date verbatim. */ - return mandoc_strdup(in); + return mandoc_strdup(nch->string); } int