#include <ccan/str_talloc/str_talloc.h>
#include <ccan/grab_file/grab_file.h>
#include <ccan/noerr/noerr.h>
+#include "../tools.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <err.h>
#include <errno.h>
#include <dirent.h>
+#include <ctype.h>
char **get_ccan_file_lines(struct ccan_file *f)
{
add_files(m, "");
return m;
}
+
+
+/**
+ * remove_comments - strip comments from a line, return copy.
+ * @line: line to copy
+ * @in_comment: are we already within a comment (from prev line).
+ * @unterminated: are we still in a comment for next line.
+ */
+static char *remove_comments(const char *line, bool in_comment,
+ bool *unterminated)
+{
+ char *p, *ret = talloc_array(line, char, strlen(line) + 1);
+
+ p = ret;
+ for (;;) {
+ if (!in_comment) {
+ /* Find first comment. */
+ const char *old_comment = strstr(line, "/*");
+ const char *new_comment = strstr(line, "//");
+ const char *comment;
+
+ if (new_comment && old_comment)
+ comment = new_comment < old_comment
+ ? new_comment : old_comment;
+ else if (old_comment)
+ comment = old_comment;
+ else if (new_comment)
+ comment = new_comment;
+ else {
+ /* Nothing more. */
+ strcpy(p, line);
+ *unterminated = false;
+ break;
+ }
+
+ /* Copy up to comment. */
+ memcpy(p, line, comment - line);
+ p += comment - line;
+ line += comment - line + 2;
+
+ if (comment == new_comment) {
+ /* We're done: goes to EOL. */
+ p[0] = '\0';
+ *unterminated = false;
+ break;
+ }
+ in_comment = true;
+ }
+
+ if (in_comment) {
+ const char *end = strstr(line, "*/");
+ if (!end) {
+ *unterminated = true;
+ p[0] = '\0';
+ break;
+ }
+ line = end+2;
+ in_comment = false;
+ }
+ }
+ return ret;
+}
+
+static bool is_empty(const char *line)
+{
+ return strspn(line, " \t") == strlen(line);
+}
+
+static bool continues(const char *line)
+{
+ /* Technically, any odd number of these. But who cares? */
+ return strends(line, "\\");
+}
+
+/* Get token if it's equal to token. */
+static bool get_token(const char **line, const char *token)
+{
+ unsigned int toklen;
+
+ *line += strspn(*line, " \t");
+ if (isalnum(token[0]) || token[0] == '_')
+ toklen = strspn(*line, IDENT_CHARS);
+ else {
+ /* FIXME: real tokenizer handles ++ and other multi-chars. */
+ toklen = strlen(token);
+ }
+
+ if (toklen == strlen(token) && !strncmp(*line, token, toklen)) {
+ *line += toklen;
+ return true;
+ }
+ return false;
+}
+
+static char *get_symbol_token(void *ctx, const char **line)
+{
+ unsigned int toklen;
+ char *ret;
+
+ *line += strspn(*line, " \t");
+ toklen = strspn(*line, IDENT_CHARS);
+ if (!toklen)
+ return NULL;
+ ret = talloc_strndup(ctx, *line, toklen);
+ *line += toklen;
+ return ret;
+}
+
+static bool parse_hash_if(struct pp_conditions *cond, const char **line)
+{
+ bool brackets, defined;
+
+ cond->inverse = get_token(line, "!");
+ defined = get_token(line, "defined");
+ brackets = get_token(line, "(");
+ cond->symbol = get_symbol_token(cond, line);
+ if (!cond->symbol)
+ return false;
+ if (brackets && !get_token(line, ")"))
+ return false;
+ if (!defined)
+ cond->type = PP_COND_IF;
+ return true;
+}
+
+/* FIXME: Get serious! */
+static struct pp_conditions *analyze_directive(struct ccan_file *f,
+ const char *line,
+ struct pp_conditions *parent)
+{
+ struct pp_conditions *cond = talloc(f, struct pp_conditions);
+ bool unused;
+
+ line = remove_comments(line, false, &unused);
+
+ cond->parent = parent;
+ cond->type = PP_COND_IFDEF;
+
+ if (!get_token(&line, "#"))
+ abort();
+
+ if (get_token(&line, "if")) {
+ if (!parse_hash_if(cond, &line))
+ goto unknown;
+ } else if (get_token(&line, "elif")) {
+ /* Malformed? */
+ if (!parent)
+ return NULL;
+ cond->parent = parent->parent;
+ /* FIXME: Not quite true. This implies !parent, but we don't
+ * do multiple conditionals yet. */
+ if (!parse_hash_if(cond, &line))
+ goto unknown;
+ } else if (get_token(&line, "ifdef")) {
+ bool brackets;
+ cond->inverse = false;
+ brackets = get_token(&line, "(");
+ cond->symbol = get_symbol_token(cond, &line);
+ if (!cond->symbol)
+ goto unknown;
+ if (brackets && !get_token(&line, ")"))
+ goto unknown;
+ } else if (get_token(&line, "ifndef")) {
+ bool brackets;
+ cond->inverse = true;
+ brackets = get_token(&line, "(");
+ cond->symbol = get_symbol_token(cond, &line);
+ if (!cond->symbol)
+ goto unknown;
+ if (brackets && !get_token(&line, ")"))
+ goto unknown;
+ } else if (get_token(&line, "else")) {
+ /* Malformed? */
+ if (!parent)
+ return NULL;
+
+ *cond = *parent;
+ cond->inverse = !cond->inverse;
+ return cond;
+ } else if (get_token(&line, "endif")) {
+ talloc_free(cond);
+ /* Malformed? */
+ if (!parent)
+ return NULL;
+ /* Back up one! */
+ return parent->parent;
+ } else {
+ /* Not a conditional. */
+ talloc_free(cond);
+ return parent;
+ }
+
+ if (!is_empty(line))
+ goto unknown;
+ return cond;
+
+unknown:
+ cond->type = PP_COND_UNKNOWN;
+ return cond;
+}
+
+/* This parser is rough, but OK if code is reasonably neat. */
+struct line_info *get_ccan_line_info(struct ccan_file *f)
+{
+ bool continued = false, in_comment = false;
+ struct pp_conditions *cond = NULL;
+ unsigned int i;
+
+ if (f->line_info)
+ return f->line_info;
+
+ get_ccan_file_lines(f);
+ f->line_info = talloc_array(f->lines, struct line_info, f->num_lines);
+
+ for (i = 0; i < f->num_lines; continued = continues(f->lines[i++])) {
+ char *p;
+ bool still_doc_line;
+
+ /* Current conditions apply to this line. */
+ f->line_info[i].cond = cond;
+ f->line_info[i].continued = continued;
+
+ if (continued) {
+ /* Same as last line. */
+ f->line_info[i].type = f->line_info[i-1].type;
+ /* Update in_comment. */
+ remove_comments(f->lines[i], in_comment, &in_comment);
+ continue;
+ }
+
+ /* Preprocessor directive? */
+ if (!in_comment
+ && f->lines[i][strspn(f->lines[i], " \t")] == '#') {
+ f->line_info[i].type = PREPROC_LINE;
+ cond = analyze_directive(f, f->lines[i], cond);
+ continue;
+ }
+
+ still_doc_line = (in_comment
+ && f->line_info[i-1].type == DOC_LINE);
+
+ p = remove_comments(f->lines[i], in_comment, &in_comment);
+ if (is_empty(p)) {
+ if (strstarts(f->lines[i], "/**") || still_doc_line)
+ f->line_info[i].type = DOC_LINE;
+ else
+ f->line_info[i].type = COMMENT_LINE;
+ } else
+ f->line_info[i].type = CODE_LINE;
+ talloc_free(p);
+ }
+ return f->line_info;
+}
+
+enum line_compiled get_ccan_line_pp(struct pp_conditions *cond,
+ const char *symbol,
+ unsigned int value)
+{
+ enum line_compiled ret;
+
+ /* No conditions? Easy. */
+ if (!cond)
+ return COMPILED;
+
+ /* Check we get here at all. */
+ ret = get_ccan_line_pp(cond->parent, symbol, value);
+ if (ret != COMPILED)
+ return ret;
+
+ switch (cond->type) {
+ case PP_COND_IF:
+ if (streq(cond->symbol, symbol)) {
+ if (!value == cond->inverse)
+ return COMPILED;
+ else
+ return NOT_COMPILED;
+ }
+ /* Unknown symbol, will be 0. */
+ if (cond->inverse)
+ return COMPILED;
+ return NOT_COMPILED;
+
+ case PP_COND_IFDEF:
+ if (streq(cond->symbol, symbol)) {
+ if (cond->inverse)
+ return NOT_COMPILED;
+ else
+ return COMPILED;
+ }
+ /* Unknown symbol, assume undefined. */
+ if (cond->inverse)
+ return COMPILED;
+ return NOT_COMPILED;
+
+ default: /* Unknown. */
+ return MAYBE_COMPILED;
+ }
+}
projects / ccan / blobdiff