static char *obj_list(const struct manifest *m)
{
- char *list;
+ char *list = talloc_strdup(m, "");
struct ccan_file *i;
/* Object files for this module. */
"{\n");
}
-static char *mangle(struct manifest *m, struct ccan_file *example)
+/* We only handle simple function definitions here. */
+static char *add_func(char *others, const char *line)
+{
+ const char *p, *end = strchr(line, '(') - 1;
+ while (isblank(*end)) {
+ end--;
+ if (end == line)
+ return others;
+ }
+
+ for (p = end; isalnum(*p) || *p == '_'; p--) {
+ if (p == line)
+ return others;
+ }
+
+ return talloc_asprintf_append(others, "printf(\"%%p\", %.*s);\n",
+ end - p + 1, p);
+}
+
+static bool looks_internal(const char *p)
+{
+ return (strncmp(p, "#", 1) != 0
+ && strncmp(p, "static", 6) != 0
+ && strncmp(p, "struct", 6) != 0
+ && strncmp(p, "union", 5) != 0);
+}
+
+static void strip_leading_whitespace(char **lines, unsigned prefix_len)
{
- char **lines = get_ccan_file_lines(example);
- char *ret;
- bool in_function = false, fake_function = false;
+ unsigned int i;
+
+ for (i = 0; lines[i]; i++)
+ if (strlen(lines[i]) >= prefix_len)
+ lines[i] += prefix_len;
+}
+
+/* Examples will often build on prior ones. Try combining them. */
+static char **combine(char **lines, char **prev)
+{
+ unsigned int i, lines_total, prev_total, count;
+ char **ret;
+
+ if (!prev)
+ return NULL;
+
+ /* If it looks internal, put prev at start. */
+ if (lines[0]
+ && isblank(lines[0][0])
+ && looks_internal(lines[0] + strspn(lines[0], " \t"))) {
+ count = 0;
+ } else {
+ /* Try inserting in first elided position */
+ for (count = 0; lines[count]; count++) {
+ if (strcmp(lines[count], "...") == 0)
+ break;
+ }
+ if (!lines[count])
+ return NULL;
+ count++;
+ }
+
+ for (i = 0; lines[i]; i++);
+ lines_total = i;
+
+ for (i = 0; prev[i]; i++);
+ prev_total = i;
+
+ ret = talloc_array(lines, char *, lines_total + prev_total + 1);
+ memcpy(ret, lines, count * sizeof(ret[0]));
+ memcpy(ret + count, prev, prev_total * sizeof(ret[0]));
+ memcpy(ret + count + prev_total, lines + count,
+ (lines_total - count + 1) * sizeof(ret[0]));
+ return ret;
+}
+
+static char *mangle(struct manifest *m, char **lines)
+{
+ char *ret, *use_funcs = NULL;
+ bool in_function = false, fake_function = false, has_main = false;
unsigned int i;
ret = talloc_strdup(m, "/* Prepend a heap of headers. */\n"
"#include <ccan/%s/%s.h>\n",
m->basename, m->basename);
- ret = talloc_asprintf_append(ret, "/* Useful dummmy functions. */\n"
+ ret = talloc_asprintf_append(ret, "/* Useful dummy functions. */\n"
"int somefunc(void);\n"
"int somefunc(void) { return 0; }\n");
- /* Starts indented? Wrap it in a main() function. */
+ /* Starts indented? */
if (lines[0] && isblank(lines[0][0])) {
- ret = start_main(ret);
- fake_function = true;
- in_function = true;
+ unsigned prefix = strspn(lines[0], " \t");
+ if (looks_internal(lines[0] + prefix)) {
+ /* Wrap it all in main(). */
+ ret = start_main(ret);
+ fake_function = true;
+ in_function = true;
+ has_main = true;
+ } else
+ strip_leading_whitespace(lines, prefix);
}
/* Primitive, very primitive. */
* == function start. */
if (!isblank(lines[i][0])
&& strchr(lines[i], '(')
- && !strchr(lines[i], ';'))
+ && !strchr(lines[i], ';')) {
in_function = true;
+ if (strncmp(lines[i], "int main", 8) == 0)
+ has_main = true;
+ if (strncmp(lines[i], "static", 6) == 0) {
+ use_funcs = add_func(use_funcs,
+ lines[i]);
+ }
+ }
}
/* ... means elided code. If followed by spaced line, means
* next part is supposed to be inside a function. */
&& isblank(lines[i+1][0])) {
/* This implies we start a function here. */
ret = start_main(ret);
+ has_main = true;
fake_function = true;
in_function = true;
}
ret = talloc_asprintf_append(ret, "%s\n", lines[i]);
}
+ /* Need a main to link successfully. */
+ if (!has_main) {
+ ret = talloc_asprintf_append(ret, "int main(void)\n{\n");
+ fake_function = true;
+ }
+
+ /* Get rid of unused warnings by printing addresses of static funcs. */
+ if (use_funcs) {
+ if (!fake_function) {
+ ret = talloc_asprintf_append(ret,
+ "int use_funcs(void);\n"
+ "int use_funcs(void) {\n");
+ fake_function = true;
+ }
+ ret = talloc_asprintf_append(ret, " %s\n", use_funcs);
+ }
+
if (fake_function)
ret = talloc_asprintf_append(ret, "return 0;\n"
"}\n");
}
static struct ccan_file *mangle_example(struct manifest *m,
- struct ccan_file *example, bool keep)
+ struct ccan_file *example,
+ char **lines,
+ bool keep)
{
char *name, *contents;
int fd;
if (fd < 0)
return NULL;
- contents = mangle(m, example);
+ contents = mangle(m, lines);
if (write(fd, contents, strlen(contents)) != strlen(contents)) {
close(fd);
return NULL;
{
struct ccan_file *i;
struct score *score = talloc(m, struct score);
+ struct ccan_file *mangle;
+ char **prev = NULL;
score->score = 0;
score->errors = NULL;
examples_compile.total_score++;
ret = compile(score, m, i, keep);
- if (!ret)
+ if (!ret) {
+ prev = get_ccan_file_lines(i);
score->score++;
- else {
- struct ccan_file *mangle = mangle_example(m, i, keep);
+ continue;
+ }
+
+ talloc_free(ret);
+ mangle = mangle_example(m, i, get_ccan_file_lines(i), keep);
+ ret = compile(score, m, mangle, keep);
+ if (!ret) {
+ prev = get_ccan_file_lines(i);
+ score->score++;
+ continue;
+ }
+ /* Try combining with previous (successful) example... */
+ prev = combine(get_ccan_file_lines(i), prev);
+ if (prev) {
talloc_free(ret);
+
+ /* We're going to replace this failure. */
+ if (keep)
+ unlink(mangle->fullname);
+ talloc_free(mangle);
+
+ mangle = mangle_example(m, i, prev, keep);
ret = compile(score, m, mangle, keep);
- if (!ret)
+ if (!ret) {
score->score++;
- else {
- if (!score->errors)
- score->errors = ret;
- else {
- score->errors
- = talloc_append_string(score->errors,
- ret);
- talloc_free(ret);
- }
+ continue;
}
}
+
+ if (!score->errors)
+ score->errors = ret;
+ else {
+ score->errors = talloc_append_string(score->errors,
+ ret);
+ talloc_free(ret);
+ }
+ /* This didn't work, so not a candidate for combining. */
+ talloc_free(prev);
+ prev = NULL;
}
return score;
}