diff options
| -rw-r--r-- | builtin-stripspace.c | 69 | ||||
| -rw-r--r-- | builtin.h | 1 |
2 files changed, 46 insertions, 24 deletions
diff --git a/builtin-stripspace.c b/builtin-stripspace.c index 62bd4b547..d8358e28f 100644 --- a/builtin-stripspace.c +++ b/builtin-stripspace.c @@ -1,58 +1,79 @@ #include "builtin.h" +#include "cache.h" /* - * Remove empty lines from the beginning and end. + * Remove trailing spaces from a line. * - * Turn multiple consecutive empty lines into just one - * empty line. Return true if it is an incomplete line. + * If the line ends with newline, it will be removed too. + * Returns the new length of the string. */ -static int cleanup(char *line) +static int cleanup(char *line, int len) { - int len = strlen(line); + if (len) { + if (line[len - 1] == '\n') + len--; - if (len && line[len-1] == '\n') { - if (len == 1) - return 0; - do { - unsigned char c = line[len-2]; + while (len) { + unsigned char c = line[len - 1]; if (!isspace(c)) break; - line[len-2] = '\n'; len--; - line[len] = 0; - } while (len > 1); - return 0; + } + line[len] = 0; } - return 1; + return len; } -static void stripspace(FILE *in, FILE *out) +/* + * Remove empty lines from the beginning and end + * and also trailing spaces from every line. + * + * Turn multiple consecutive empty lines between paragraphs + * into just one empty line. + * + * If the input has only empty lines and spaces, + * no output will be produced. + * + * Enable skip_comments to skip every line starting with "#". + */ +void stripspace(FILE *in, FILE *out, int skip_comments) { int empties = -1; - int incomplete = 0; - char line[1024]; + int alloc = 1024; + char *line = xmalloc(alloc); + + while (fgets(line, alloc, in)) { + int len = strlen(line); - while (fgets(line, sizeof(line), in)) { - incomplete = cleanup(line); + while (len == alloc - 1 && line[len - 1] != '\n') { + alloc = alloc_nr(alloc); + line = xrealloc(line, alloc); + fgets(line + len, alloc - len, in); + len += strlen(line + len); + } + + if (skip_comments && line[0] == '#') + continue; + len = cleanup(line, len); /* Not just an empty line? */ - if (line[0] != '\n') { + if (len) { if (empties > 0) fputc('\n', out); empties = 0; fputs(line, out); + fputc('\n', out); continue; } if (empties < 0) continue; empties++; } - if (incomplete) - fputc('\n', out); + free(line); } int cmd_stripspace(int argc, const char **argv, const char *prefix) { - stripspace(stdin, stdout); + stripspace(stdin, stdout, 0); return 0; } @@ -7,6 +7,7 @@ extern const char git_version_string[]; extern const char git_usage_string[]; extern void help_unknown_cmd(const char *cmd); +extern void stripspace(FILE *in, FILE *out, int skip_comments); extern int write_tree(unsigned char *sha1, int missing_ok, const char *prefix); extern void prune_packed_objects(int); |