diff options
Diffstat (limited to 'libmandoc.c')
| -rw-r--r-- | libmandoc.c | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/libmandoc.c b/libmandoc.c new file mode 100644 index 00000000..e59ca02b --- /dev/null +++ b/libmandoc.c @@ -0,0 +1,396 @@ +/* $Id$ */ +/* + * Copyright (c) 2008, 2009 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 + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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. + */ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <sys/types.h> + +#include <assert.h> +#include <ctype.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <time.h> + +#include "mandoc.h" +#include "libmandoc.h" + +static int a2time(time_t *, const char *, const char *); +static int spec_norm(char *, int); + + +/* + * "Normalise" a special string by converting its ASCII_HYPH entries + * into actual hyphens. + */ +static int +spec_norm(char *p, int sz) +{ + int i; + + for (i = 0; i < sz; i++) + if (ASCII_HYPH == p[i]) + p[i] = '-'; + + return(sz); +} + + +int +mandoc_special(char *p) +{ + int terminator; /* Terminator for \s. */ + int lim; /* Limit for N in \s. */ + int c, i; + char *sv; + + sv = p; + + if ('\\' != *p++) + return(spec_norm(sv, 0)); + + switch (*p) { + case ('\''): + /* FALLTHROUGH */ + case ('`'): + /* FALLTHROUGH */ + case ('q'): + /* FALLTHROUGH */ + case (ASCII_HYPH): + /* FALLTHROUGH */ + case ('-'): + /* FALLTHROUGH */ + case ('~'): + /* FALLTHROUGH */ + case ('^'): + /* FALLTHROUGH */ + case ('%'): + /* FALLTHROUGH */ + case ('0'): + /* FALLTHROUGH */ + case (' '): + /* FALLTHROUGH */ + case ('}'): + /* FALLTHROUGH */ + case ('|'): + /* FALLTHROUGH */ + case ('&'): + /* FALLTHROUGH */ + case ('.'): + /* FALLTHROUGH */ + case (':'): + /* FALLTHROUGH */ + case ('c'): + /* FALLTHROUGH */ + case ('e'): + return(spec_norm(sv, 2)); + case ('s'): + if ('\0' == *++p) + return(spec_norm(sv, 2)); + + c = 2; + terminator = 0; + lim = 1; + + if (*p == '\'') { + lim = 0; + terminator = 1; + ++p; + ++c; + } else if (*p == '[') { + lim = 0; + terminator = 2; + ++p; + ++c; + } else if (*p == '(') { + lim = 2; + terminator = 3; + ++p; + ++c; + } + + if (*p == '+' || *p == '-') { + ++p; + ++c; + } + + if (*p == '\'') { + if (terminator) + return(spec_norm(sv, 0)); + lim = 0; + terminator = 1; + ++p; + ++c; + } else if (*p == '[') { + if (terminator) + return(spec_norm(sv, 0)); + lim = 0; + terminator = 2; + ++p; + ++c; + } else if (*p == '(') { + if (terminator) + return(spec_norm(sv, 0)); + lim = 2; + terminator = 3; + ++p; + ++c; + } + + /* TODO: needs to handle floating point. */ + + if ( ! isdigit((u_char)*p)) + return(spec_norm(sv, 0)); + + for (i = 0; isdigit((u_char)*p); i++) { + if (lim && i >= lim) + break; + ++p; + ++c; + } + + if (terminator && terminator < 3) { + if (1 == terminator && *p != '\'') + return(spec_norm(sv, 0)); + if (2 == terminator && *p != ']') + return(spec_norm(sv, 0)); + ++p; + ++c; + } + + return(spec_norm(sv, c)); + case ('f'): + /* FALLTHROUGH */ + case ('F'): + /* FALLTHROUGH */ + case ('*'): + if ('\0' == *++p || isspace((u_char)*p)) + return(spec_norm(sv, 0)); + switch (*p) { + case ('('): + if ('\0' == *++p || isspace((u_char)*p)) + return(spec_norm(sv, 0)); + return(spec_norm(sv, 4)); + case ('['): + for (c = 3, p++; *p && ']' != *p; p++, c++) + if (isspace((u_char)*p)) + break; + return(spec_norm(sv, *p == ']' ? c : 0)); + default: + break; + } + return(spec_norm(sv, 3)); + case ('('): + if ('\0' == *++p || isspace((u_char)*p)) + return(spec_norm(sv, 0)); + if ('\0' == *++p || isspace((u_char)*p)) + return(spec_norm(sv, 0)); + return(spec_norm(sv, 4)); + case ('['): + break; + default: + return(spec_norm(sv, 0)); + } + + for (c = 3, p++; *p && ']' != *p; p++, c++) + if (isspace((u_char)*p)) + break; + + return(spec_norm(sv, *p == ']' ? c : 0)); +} + + +void * +mandoc_calloc(size_t num, size_t size) +{ + void *ptr; + + ptr = calloc(num, size); + if (NULL == ptr) { + perror(NULL); + exit(EXIT_FAILURE); + } + + return(ptr); +} + + +void * +mandoc_malloc(size_t size) +{ + void *ptr; + + ptr = malloc(size); + if (NULL == ptr) { + perror(NULL); + exit(EXIT_FAILURE); + } + + return(ptr); +} + + +void * +mandoc_realloc(void *ptr, size_t size) +{ + + ptr = realloc(ptr, size); + if (NULL == ptr) { + perror(NULL); + exit(EXIT_FAILURE); + } + + return(ptr); +} + + +char * +mandoc_strdup(const char *ptr) +{ + char *p; + + p = strdup(ptr); + if (NULL == p) { + perror(NULL); + exit(EXIT_FAILURE); + } + + return(p); +} + + +static int +a2time(time_t *t, const char *fmt, const char *p) +{ + struct tm tm; + char *pp; + + memset(&tm, 0, sizeof(struct tm)); + + pp = strptime(p, fmt, &tm); + if (NULL != pp && '\0' == *pp) { + *t = mktime(&tm); + return(1); + } + + return(0); +} + + +/* + * Convert from a manual date string (see mdoc(7) and man(7)) into a + * date according to the stipulated date type. + */ +time_t +mandoc_a2time(int flags, const char *p) +{ + time_t t; + + if (MTIME_MDOCDATE & flags) { + if (0 == strcmp(p, "$" "Mdocdate$")) + return(time(NULL)); + if (a2time(&t, "$" "Mdocdate: %b %d %Y $", p)) + return(t); + } + + if (MTIME_CANONICAL & flags || MTIME_REDUCED & flags) + if (a2time(&t, "%b %d, %Y", p)) + return(t); + + if (MTIME_ISO_8601 & flags) + if (a2time(&t, "%Y-%m-%d", p)) + return(t); + + if (MTIME_REDUCED & flags) { + if (a2time(&t, "%d, %Y", p)) + return(t); + if (a2time(&t, "%Y", p)) + return(t); + } + + return(0); +} + + +int +mandoc_eos(const char *p, size_t sz) +{ + + if (0 == sz) + return(0); + + /* + * End-of-sentence recognition must include situations where + * some symbols, such as `)', allow prior EOS punctuation to + * propogate outward. + */ + + for ( ; sz; sz--) { + switch (p[(int)sz - 1]) { + case ('\"'): + /* FALLTHROUGH */ + case ('\''): + /* FALLTHROUGH */ + case (']'): + /* FALLTHROUGH */ + case (')'): + break; + case ('.'): + /* Escaped periods. */ + if (sz > 1 && '\\' == p[(int)sz - 2]) + return(0); + /* FALLTHROUGH */ + case ('!'): + /* FALLTHROUGH */ + case ('?'): + return(1); + default: + return(0); + } + } + + return(0); +} + + +int +mandoc_hyph(const char *start, const char *c) +{ + + /* + * Choose whether to break at a hyphenated character. We only + * do this if it's free-standing within a word. + */ + + /* 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); + + return(1); +} |