diff options
| -rw-r--r-- | convert.c | 54 |
1 files changed, 40 insertions, 14 deletions
@@ -876,24 +876,42 @@ int is_null_stream_filter(struct stream_filter *filter) /* * LF-to-CRLF filter */ + +struct lf_to_crlf_filter { + struct stream_filter filter; + unsigned want_lf:1; +}; + static int lf_to_crlf_filter_fn(struct stream_filter *filter, const char *input, size_t *isize_p, char *output, size_t *osize_p) { - size_t count; + size_t count, o = 0; + struct lf_to_crlf_filter *lf_to_crlf = (struct lf_to_crlf_filter *)filter; + + /* Output a pending LF if we need to */ + if (lf_to_crlf->want_lf) { + output[o++] = '\n'; + lf_to_crlf->want_lf = 0; + } + + /* We are told to drain */ + if (!input) { + *osize_p -= o; + return 0; + } - if (!input) - return 0; /* we do not keep any states */ count = *isize_p; if (count) { - size_t i, o; - for (i = o = 0; o < *osize_p && i < count; i++) { + size_t i; + for (i = 0; o < *osize_p && i < count; i++) { char ch = input[i]; if (ch == '\n') { - if (o + 1 < *osize_p) - output[o++] = '\r'; - else - break; + output[o++] = '\r'; + if (o >= *osize_p) { + lf_to_crlf->want_lf = 1; + continue; /* We need to increase i */ + } } output[o++] = ch; } @@ -904,15 +922,23 @@ static int lf_to_crlf_filter_fn(struct stream_filter *filter, return 0; } +static void lf_to_crlf_free_fn(struct stream_filter *filter) +{ + free(filter); +} + static struct stream_filter_vtbl lf_to_crlf_vtbl = { lf_to_crlf_filter_fn, - null_free_fn, + lf_to_crlf_free_fn, }; -static struct stream_filter lf_to_crlf_filter_singleton = { - &lf_to_crlf_vtbl, -}; +static struct stream_filter *lf_to_crlf_filter(void) +{ + struct lf_to_crlf_filter *lf_to_crlf = xcalloc(1, sizeof(*lf_to_crlf)); + lf_to_crlf->filter.vtbl = &lf_to_crlf_vtbl; + return (struct stream_filter *)lf_to_crlf; +} /* * Cascade filter @@ -1194,7 +1220,7 @@ struct stream_filter *get_stream_filter(const char *path, const unsigned char *s else if (output_eol(crlf_action) == EOL_CRLF && !(crlf_action == CRLF_AUTO || crlf_action == CRLF_GUESS)) - filter = cascade_filter(filter, &lf_to_crlf_filter_singleton); + filter = cascade_filter(filter, lf_to_crlf_filter()); return filter; } |