=================================================================== RCS file: /cvs/mandoc/mandoc.c,v retrieving revision 1.39 retrieving revision 1.121 diff -u -p -r1.39 -r1.121 --- mandoc/mandoc.c 2011/03/15 16:23:51 1.39 +++ mandoc/mandoc.c 2022/05/19 15:37:47 1.121 @@ -1,7 +1,8 @@ -/* $Id: mandoc.c,v 1.39 2011/03/15 16:23:51 kristaps Exp $ */ +/* $Id: mandoc.c,v 1.121 2022/05/19 15:37:47 schwarze Exp $ */ /* - * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons - * Copyright (c) 2011 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 @@ -14,356 +15,88 @@ * 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. */ -#ifdef HAVE_CONFIG_H #include "config.h" -#endif #include #include #include +#include +#include #include #include #include #include +#include "mandoc_aux.h" #include "mandoc.h" +#include "roff.h" #include "libmandoc.h" +#include "roff_int.h" -#define DATESIZE 32 - static int a2time(time_t *, const char *, const char *); static char *time2a(time_t); -int -mandoc_special(char *p) -{ - int len, i; - char term; - char *sv; - - len = 0; - term = '\0'; - sv = p; - assert('\\' == *p); - p++; - - 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; - } - - switch (*p++) { - case ('('): - len = 2; - break; - case ('['): - term = ']'; - break; - case ('\''): - term = '\''; - break; - case ('0'): - i = 1; - /* FALLTHROUGH */ +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: - len = 1; - p--; - break; + return ESCAPE_ERROR; } - - 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; - } - - if (')' == *p++) - break; - - return(0); - } else if ('\\' == *p) { - if (0 == (i = mandoc_special(p))) - return(0); - p += i; - } - - 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'): - /* FALLTHROUGH */ - case ('*'): - switch (*p++) { - case ('('): - len = 2; - break; - case ('['): - term = ']'; - break; + 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_FONTCB; + case 'I': + return ESCAPE_FONTCI; + case 'R': + case 'W': + return ESCAPE_FONTCR; + default: + return ESCAPE_ERROR; + } default: - len = 1; - p--; - break; + return ESCAPE_ERROR; } - break; - case ('('): - len = 2; - break; - case ('['): - term = ']'; - break; - case ('z'): - len = 1; - if ('\\' == *p) { - if (0 == (i = mandoc_special(p))) - return(0); - p += i; - return(*p ? (int)(p - sv) : 0); - } - break; - case ('o'): - /* FALLTHROUGH */ - case ('w'): - if ('\'' == *p++) { - term = '\''; - break; - } - /* FALLTHROUGH */ default: - len = 1; - p--; - break; + return ESCAPE_ERROR; } - - 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; - - ptr = calloc(num, size); - if (NULL == ptr) { - perror(NULL); - exit((int)MANDOCLEVEL_SYSERR); - } - - return(ptr); -} - - -void * -mandoc_malloc(size_t size) -{ - void *ptr; - - ptr = malloc(size); - if (NULL == ptr) { - perror(NULL); - exit((int)MANDOCLEVEL_SYSERR); - } - - return(ptr); -} - - -void * -mandoc_realloc(void *ptr, size_t size) -{ - - ptr = realloc(ptr, size); - if (NULL == ptr) { - perror(NULL); - exit((int)MANDOCLEVEL_SYSERR); - } - - return(ptr); -} - - -char * -mandoc_strdup(const char *ptr) -{ - char *p; - - p = strdup(ptr); - if (NULL == p) { - perror(NULL); - exit((int)MANDOCLEVEL_SYSERR); - } - - return(p); -} - -/* - * 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. - * Collapse pairs of quotes inside quoted arguments. - * Advance the argument pointer to the next argument, - * or to the null byte terminating the argument line. - */ -char * -mandoc_getarg(char **cpp, mandocmsg msg, void *data, int ln, int *pos) -{ - char *start, *cp; - int quoted, pairs, white; - - /* Quoting can only start with a new word. */ - start = *cpp; - if ('"' == *start) { - quoted = 1; - start++; - } else - quoted = 0; - - pairs = 0; - white = 0; - for (cp = start; '\0' != *cp; cp++) { - /* Move left after quoted quotes and escaped backslashes. */ - if (pairs) - cp[-pairs] = cp[0]; - if ('\\' == cp[0]) { - if ('\\' == cp[1]) { - /* Poor man's copy mode. */ - pairs++; - cp++; - } else if (0 == quoted && ' ' == cp[1]) - /* Skip escaped blanks. */ - cp++; - } 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 && msg) - (*msg)(MANDOCERR_BADQUOTE, data, ln, *pos, NULL); - - /* Null-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 && msg && (white || ' ' == cp[-1])) - (*msg)(MANDOCERR_EOLNSPACE, data, ln, *pos, NULL); - - return(start); -} - - static int a2time(time_t *t, const char *fmt, const char *p) { @@ -372,25 +105,30 @@ a2time(time_t *t, const char *fmt, const char *p) 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 1; } - return(0); + return 0; } - static char * time2a(time_t t) { - struct tm tm; + struct tm *tm; char *buf, *p; size_t ssz; int isz; - localtime_r(&t, &tm); + buf = NULL; + tm = localtime(&t); + if (tm == NULL) + goto fail; /* * Reserve space: @@ -398,115 +136,158 @@ time2a(time_t t) * 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 (0 == (ssz = strftime(p, 10 + 1, "%B ", &tm))) + if ((ssz = strftime(p, 10 + 1, "%B ", tm)) == 0) 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. + */ + + isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday); + if (isz < 0 || isz > 4) goto fail; p += isz; - if (0 == strftime(p, 4 + 1, "%Y", &tm)) + if (strftime(p, 4 + 1, "%Y", tm) == 0) goto fail; - return(buf); + return buf; fail: free(buf); - return(NULL); + return mandoc_strdup(""); } - char * -mandoc_normdate(char *in, mandocmsg msg, void *data, int ln, int pos) +mandoc_normdate(struct roff_node *nch, struct roff_node *nbl) { - char *out; + char *cp; time_t t; - if (NULL == in || '\0' == *in || - 0 == strcmp(in, "$" "Mdocdate$")) { - (*msg)(MANDOCERR_NODATE, data, ln, pos, NULL); - time(&t); + /* No date specified. */ + + if (nch == NULL) { + if (nbl == NULL) + mandoc_msg(MANDOCERR_DATE_MISSING, 0, 0, NULL); + else + mandoc_msg(MANDOCERR_DATE_MISSING, nbl->line, + nbl->pos, "%s", roff_name[nbl->tok]); + return mandoc_strdup(""); } - else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) && - !a2time(&t, "%b %d, %Y", in) && - !a2time(&t, "%Y-%m-%d", in)) { - (*msg)(MANDOCERR_BADDATE, data, ln, pos, NULL); - t = 0; + if (*nch->string == '\0') { + mandoc_msg(MANDOCERR_DATE_MISSING, nch->line, + nch->pos, "%s", roff_name[nbl->tok]); + return mandoc_strdup(""); } - out = t ? time2a(t) : NULL; - return(out ? out : mandoc_strdup(in)); -} + if (strcmp(nch->string, "$" "Mdocdate$") == 0) + return time2a(time(NULL)); + /* Valid mdoc(7) date format. */ + if (a2time(&t, "$" "Mdocdate: %b %d %Y $", nch->string) || + a2time(&t, "%b %d, %Y", nch->string)) { + cp = time2a(t); + if (t > time(NULL) + 86400) + mandoc_msg(MANDOCERR_DATE_FUTURE, nch->line, + nch->pos, "%s %s", roff_name[nbl->tok], cp); + else if (*nch->string != '$' && + 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", 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, 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(nch->string); +} + 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) - return(0); + return 0; /* * 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) { - case ('\"'): - /* FALLTHROUGH */ - case ('\''): - /* FALLTHROUGH */ - case (']'): - /* FALLTHROUGH */ - case (')'): + case '\"': + case '\'': + case ']': + case ')': if (0 == found) enclosed = 1; break; - case ('.'): - /* FALLTHROUGH */ - case ('!'): - /* FALLTHROUGH */ - case ('?'): + case '.': + case '!': + case '?': 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 -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); + memcpy(buf, p, sz); + buf[(int)sz] = '\0'; - return(1); + 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; }