diff options
Diffstat (limited to 'mandoc.c')
| -rw-r--r-- | mandoc.c | 394 |
1 files changed, 9 insertions, 385 deletions
@@ -1,7 +1,8 @@ -/* $Id: mandoc.c,v 1.120 2022/04/13 13:19:34 schwarze Exp $ */ +/* $Id: mandoc.c,v 1.121 2022/05/19 15:37:47 schwarze Exp $ */ /* - * Copyright (c) 2011-2015, 2017-2022 Ingo Schwarze <schwarze@openbsd.org> - * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv> + * Copyright (c) 2010, 2011, 2015, 2017, 2018, 2019, 2020, 2021 + * Ingo Schwarze <schwarze@openbsd.org> + * Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv> * * 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" @@ -91,388 +97,6 @@ mandoc_font(const char *cp, int sz) } } -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. - */ - - while (**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': - case '*': - switch ((*start)[-1]) { - case 'f': - gly = ESCAPE_FONT; - break; - case '*': - gly = ESCAPE_DEVICE; - break; - default: - gly = ESCAPE_IGNORE; - break; - } - 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; - - /* - * 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; - case ESCAPE_DEVICE: - assert(*sz == 2 && (*start)[0] == '.' && (*start)[1] == 'T'); - break; - default: - break; - } - - return gly; -} - static int a2time(time_t *t, const char *fmt, const char *p) { |