+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(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 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)
+ mandoc_msg(MANDOCERR_BADQUOTE, parse, 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 && (white || ' ' == cp[-1]))
+ mandoc_msg(MANDOCERR_EOLNSPACE, parse, ln, *pos, NULL);
+
+ return(start);
+}
+
+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);
+}
+
+static char *
+time2a(time_t t)
+{
+ struct tm tm;
+ char *buf, *p;
+ size_t ssz;
+ int isz;
+
+ localtime_r(&t, &tm);
+
+ /*
+ * 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 (0 == (ssz = strftime(p, 10 + 1, "%B ", &tm)))
+ goto fail;
+ p += (int)ssz;
+
+ if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm.tm_mday)))
+ goto fail;
+ p += isz;
+
+ if (0 == strftime(p, 4 + 1, "%Y", &tm))
+ goto fail;
+ return(buf);
+
+fail:
+ free(buf);
+ return(NULL);
+}
+
+char *
+mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
+{
+ char *out;
+ time_t t;
+
+ if (NULL == in || '\0' == *in ||
+ 0 == strcmp(in, "$" "Mdocdate$")) {
+ mandoc_msg(MANDOCERR_NODATE, parse, ln, pos, NULL);
+ time(&t);
+ }
+ else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
+ !a2time(&t, "%b %d, %Y", in) &&
+ !a2time(&t, "%Y-%m-%d", in)) {
+ mandoc_msg(MANDOCERR_BADDATE, parse, ln, pos, NULL);
+ t = 0;
+ }
+ out = t ? time2a(t) : NULL;
+ return(out ? out : mandoc_strdup(in));
+}
+
+int
+mandoc_eos(const char *p, size_t sz, int enclosed)
+{
+ const char *q;
+ int found;
+
+ if (0 == sz)
+ return(0);
+
+ /*
+ * End-of-sentence recognition must include situations where
+ * some symbols, such as `)', allow prior EOS punctuation to
+ * propogate outward.
+ */
+
+ found = 0;
+ for (q = p + (int)sz - 1; q >= p; q--) {
+ switch (*q) {
+ case ('\"'):
+ /* FALLTHROUGH */
+ case ('\''):
+ /* FALLTHROUGH */
+ case (']'):
+ /* FALLTHROUGH */
+ case (')'):
+ if (0 == found)
+ enclosed = 1;
+ break;
+ case ('.'):
+ /* FALLTHROUGH */
+ case ('!'):
+ /* FALLTHROUGH */
+ case ('?'):
+ found = 1;
+ break;
+ default:
+ return(found && (!enclosed || isalnum((unsigned char)*q)));
+ }
+ }
+
+ return(found && !enclosed);
+}
+
+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);
+}
+
+/*
+ * Find out whether a line is a macro line or not. If it is, adjust the
+ * current position and return one; if it isn't, return zero and don't
+ * change the current position.
+ */
+int
+mandoc_getcontrol(const char *cp, int *ppos)
+{
+ int pos;
+
+ pos = *ppos;
+
+ if ('\\' == cp[pos] && '.' == cp[pos + 1])
+ pos += 2;
+ else if ('.' == cp[pos] || '\'' == cp[pos])
+ pos++;
+ else
+ return(0);
+
+ while (' ' == cp[pos] || '\t' == cp[pos])
+ pos++;
+
+ *ppos = pos;
+ return(1);
+}
git.ckatri.com / mandoc.git / blobdiff