diff options
Diffstat (limited to 'strbuf.c')
| -rw-r--r-- | strbuf.c | 176 |
1 files changed, 168 insertions, 8 deletions
@@ -187,7 +187,7 @@ void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len) void strbuf_remove(struct strbuf *sb, size_t pos, size_t len) { - strbuf_splice(sb, pos, len, NULL, 0); + strbuf_splice(sb, pos, len, "", 0); } void strbuf_add(struct strbuf *sb, const void *data, size_t len) @@ -197,6 +197,13 @@ void strbuf_add(struct strbuf *sb, const void *data, size_t len) strbuf_setlen(sb, sb->len + len); } +void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2) +{ + strbuf_grow(sb, sb2->len); + memcpy(sb->buf + sb->len, sb2->buf, sb2->len); + strbuf_setlen(sb, sb->len + sb2->len); +} + void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len) { strbuf_grow(sb, len); @@ -245,8 +252,8 @@ void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size static char prefix2[2]; if (prefix1[0] != comment_line_char) { - sprintf(prefix1, "%c ", comment_line_char); - sprintf(prefix2, "%c", comment_line_char); + xsnprintf(prefix1, sizeof(prefix1), "%c ", comment_line_char); + xsnprintf(prefix2, sizeof(prefix2), "%c", comment_line_char); } add_lines(out, prefix1, prefix2, buf, size); } @@ -384,6 +391,23 @@ ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint) return sb->len - oldlen; } +ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint) +{ + ssize_t cnt; + + strbuf_grow(sb, hint ? hint : 8192); + cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1); + if (cnt > 0) + strbuf_setlen(sb, sb->len + cnt); + return cnt; +} + +ssize_t strbuf_write(struct strbuf *sb, FILE *f) +{ + return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0; +} + + #define STRBUF_MAXLINK (2*PATH_MAX) int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint) @@ -470,9 +494,15 @@ int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term) if (errno == ENOMEM) die("Out of memory, getdelim failed"); - /* Restore slopbuf that we moved out of the way before */ + /* + * Restore strbuf invariants; if getdelim left us with a NULL pointer, + * we can just re-init, but otherwise we should make sure that our + * length is empty, and that the result is NUL-terminated. + */ if (!sb->buf) strbuf_init(sb, 0); + else + strbuf_reset(sb); return EOF; } #else @@ -501,15 +531,37 @@ int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term) } #endif -int strbuf_getline(struct strbuf *sb, FILE *fp, int term) +static int strbuf_getdelim(struct strbuf *sb, FILE *fp, int term) { if (strbuf_getwholeline(sb, fp, term)) return EOF; - if (sb->buf[sb->len-1] == term) - strbuf_setlen(sb, sb->len-1); + if (sb->buf[sb->len - 1] == term) + strbuf_setlen(sb, sb->len - 1); return 0; } +int strbuf_getline(struct strbuf *sb, FILE *fp) +{ + if (strbuf_getwholeline(sb, fp, '\n')) + return EOF; + if (sb->buf[sb->len - 1] == '\n') { + strbuf_setlen(sb, sb->len - 1); + if (sb->len && sb->buf[sb->len - 1] == '\r') + strbuf_setlen(sb, sb->len - 1); + } + return 0; +} + +int strbuf_getline_lf(struct strbuf *sb, FILE *fp) +{ + return strbuf_getdelim(sb, fp, '\n'); +} + +int strbuf_getline_nul(struct strbuf *sb, FILE *fp) +{ + return strbuf_getdelim(sb, fp, '\0'); +} + int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term) { strbuf_reset(sb); @@ -685,7 +737,7 @@ char *xstrdup_tolower(const char *string) size_t len, i; len = strlen(string); - result = xmalloc(len + 1); + result = xmallocz(len); for (i = 0; i < len; i++) result[i] = tolower(string[i]); result[i] = '\0'; @@ -710,3 +762,111 @@ char *xstrfmt(const char *fmt, ...) return ret; } + +void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm) +{ + size_t hint = 128; + size_t len; + + if (!*fmt) + return; + + strbuf_grow(sb, hint); + len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm); + + if (!len) { + /* + * strftime reports "0" if it could not fit the result in the buffer. + * Unfortunately, it also reports "0" if the requested time string + * takes 0 bytes. So our strategy is to munge the format so that the + * output contains at least one character, and then drop the extra + * character before returning. + */ + struct strbuf munged_fmt = STRBUF_INIT; + strbuf_addf(&munged_fmt, "%s ", fmt); + while (!len) { + hint *= 2; + strbuf_grow(sb, hint); + len = strftime(sb->buf + sb->len, sb->alloc - sb->len, + munged_fmt.buf, tm); + } + strbuf_release(&munged_fmt); + len--; /* drop munged space */ + } + strbuf_setlen(sb, sb->len + len); +} + +void strbuf_add_unique_abbrev(struct strbuf *sb, const unsigned char *sha1, + int abbrev_len) +{ + int r; + strbuf_grow(sb, GIT_SHA1_HEXSZ + 1); + r = find_unique_abbrev_r(sb->buf + sb->len, sha1, abbrev_len); + strbuf_setlen(sb, sb->len + r); +} + +/* + * Returns the length of a line, without trailing spaces. + * + * If the line ends with newline, it will be removed too. + */ +static size_t cleanup(char *line, size_t len) +{ + while (len) { + unsigned char c = line[len - 1]; + if (!isspace(c)) + break; + len--; + } + + return len; +} + +/* + * 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. + * + * If last line does not have a newline at the end, one is added. + * + * Enable skip_comments to skip every line starting with comment + * character. + */ +void strbuf_stripspace(struct strbuf *sb, int skip_comments) +{ + int empties = 0; + size_t i, j, len, newlen; + char *eol; + + /* We may have to add a newline. */ + strbuf_grow(sb, 1); + + for (i = j = 0; i < sb->len; i += len, j += newlen) { + eol = memchr(sb->buf + i, '\n', sb->len - i); + len = eol ? eol - (sb->buf + i) + 1 : sb->len - i; + + if (skip_comments && len && sb->buf[i] == comment_line_char) { + newlen = 0; + continue; + } + newlen = cleanup(sb->buf + i, len); + + /* Not just an empty line? */ + if (newlen) { + if (empties > 0 && j > 0) + sb->buf[j++] = '\n'; + empties = 0; + memmove(sb->buf + j, sb->buf + i, newlen); + sb->buf[newlen + j++] = '\n'; + } else { + empties++; + } + } + + strbuf_setlen(sb, j); +} |