+/* This merely extracts, doesn't do XML or anything. */
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <ctype.h>
+#include <ccan/talloc/talloc.h>
+#include <ccan/str/str.h>
+#include "doc_extract.h"
+#include "tools.h"
+
+static char **grab_doc(char **lines, unsigned int num)
+{
+ char **ret;
+ unsigned int i;
+ bool printing = false;
+
+ ret = talloc_array(NULL, char *, num+1);
+
+ num = 0;
+ for (i = 0; lines[i]; i++) {
+ if (streq(lines[i], "/**")) {
+ printing = true;
+ if (num != 0)
+ talloc_append_string(ret[num-1], "\n");
+ } else if (streq(lines[i], " */"))
+ printing = false;
+ else if (printing) {
+ if (strstarts(lines[i], " * "))
+ ret[num++] = talloc_strdup(ret, lines[i]+3);
+ else if (strstarts(lines[i], " *"))
+ ret[num++] = talloc_strdup(ret, lines[i]+2);
+ else
+ errx(1, "Malformed line %u", i);
+ }
+ }
+ ret[num] = NULL;
+ return ret;
+}
+
+static bool is_blank(const char *line)
+{
+ return line && line[strspn(line, " \t\n")] == '\0';
+}
+
+static bool is_section(const char *line, bool one_liner)
+{
+ unsigned int len;
+
+ if (!isupper(line[0]))
+ return false;
+ len = strspn(line, IDENT_CHARS);
+ if (line[len] != ':')
+ return false;
+
+ /* If it can be a one-liner, a space is sufficient.*/
+ if (one_liner)
+ return (line[len+1] == ' ' || line[len+1] == '\t');
+
+ return line[len] == ':' && is_blank(line+len+1);
+}
+
+/* Summary line is form '<identifier> - ' */
+static bool is_summary_line(const char *line)
+{
+ unsigned int id_len;
+
+ id_len = strspn(line, IDENT_CHARS);
+ if (id_len == 0)
+ return false;
+ if (!strstarts(line + id_len, " - "))
+ return false;
+
+ return true;
+}
+
+static struct doc_section *new_section(struct list_head *list,
+ const char *function,
+ const char *type)
+{
+ struct doc_section *d = talloc(list, struct doc_section);
+ d->function = function;
+ d->type = type;
+ d->lines = NULL;
+ d->num_lines = 0;
+ list_add_tail(list, &d->list);
+ return d;
+}
+
+static void add_line(struct doc_section *curr, const char *line)
+{
+ curr->lines = talloc_realloc(curr, curr->lines, char *,
+ curr->num_lines+1);
+ curr->lines[curr->num_lines++] = talloc_strdup(curr->lines, line);
+}
+
+struct list_head *extract_doc_sections(char **rawlines, unsigned int num)
+{
+ char **lines = grab_doc(rawlines, num);
+ const char *function = NULL;
+ struct doc_section *curr = NULL;
+ unsigned int i;
+ struct list_head *list;
+
+ list = talloc(NULL, struct list_head);
+ list_head_init(list);
+
+ for (i = 0; lines[i]; i++) {
+ if (is_summary_line(lines[i])) {
+ function = talloc_strndup(list, lines[i],
+ strcspn(lines[i], " "));
+ curr = new_section(list, function, "summary");
+ add_line(curr, strstr(lines[i], " - ") + 3);
+ curr = new_section(list, function, "description");
+ } else if (is_section(lines[i], false)) {
+ char *type = talloc_strndup(curr, lines[i],
+ strcspn(lines[i], ":"));
+ curr = new_section(list, function, type);
+ } else if (is_section(lines[i], true)) {
+ unsigned int sectlen = strcspn(lines[i], ":");
+ char *type = talloc_strndup(curr, lines[i], sectlen);
+ curr = new_section(list, function, type);
+ add_line(curr, lines[i] + sectlen + 1
+ + strspn(lines[i] + sectlen + 1, " \t"));
+ } else {
+ if (!curr)
+ continue;
+ add_line(curr, lines[i]);
+ }
+ }
+ talloc_free(lines);
+ return list;
+}