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-rw-r--r--strbuf.c334
1 files changed, 296 insertions, 38 deletions
diff --git a/strbuf.c b/strbuf.c
index 05d0693eba..29df55b1b0 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -1,22 +1,14 @@
#include "cache.h"
#include "refs.h"
+#include "utf8.h"
-int prefixcmp(const char *str, const char *prefix)
+int starts_with(const char *str, const char *prefix)
{
for (; ; str++, prefix++)
if (!*prefix)
- return 0;
+ return 1;
else if (*str != *prefix)
- return (unsigned char)*prefix - (unsigned char)*str;
-}
-
-int suffixcmp(const char *str, const char *suffix)
-{
- int len = strlen(str), suflen = strlen(suffix);
- if (len < suflen)
- return -1;
- else
- return strcmp(str + len - suflen, suffix);
+ return 0;
}
/*
@@ -78,15 +70,8 @@ void strbuf_grow(struct strbuf *sb, size_t extra)
void strbuf_trim(struct strbuf *sb)
{
- char *b = sb->buf;
- while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
- sb->len--;
- while (sb->len > 0 && isspace(*b)) {
- b++;
- sb->len--;
- }
- memmove(sb->buf, b, sb->len);
- sb->buf[sb->len] = '\0';
+ strbuf_rtrim(sb);
+ strbuf_ltrim(sb);
}
void strbuf_rtrim(struct strbuf *sb)
{
@@ -106,6 +91,29 @@ void strbuf_ltrim(struct strbuf *sb)
sb->buf[sb->len] = '\0';
}
+int strbuf_reencode(struct strbuf *sb, const char *from, const char *to)
+{
+ char *out;
+ int len;
+
+ if (same_encoding(from, to))
+ return 0;
+
+ out = reencode_string_len(sb->buf, sb->len, to, from, &len);
+ if (!out)
+ return -1;
+
+ strbuf_attach(sb, out, len, len);
+ return 0;
+}
+
+void strbuf_tolower(struct strbuf *sb)
+{
+ char *p = sb->buf, *end = sb->buf + sb->len;
+ for (; p < end; p++)
+ *p = tolower(*p);
+}
+
struct strbuf **strbuf_split_buf(const char *str, size_t slen,
int terminator, int max)
{
@@ -196,6 +204,13 @@ void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
strbuf_setlen(sb, sb->len + len);
}
+void strbuf_addchars(struct strbuf *sb, int c, size_t n)
+{
+ strbuf_grow(sb, n);
+ memset(sb->buf + sb->len, c, n);
+ strbuf_setlen(sb, sb->len + n);
+}
+
void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
{
va_list ap;
@@ -204,6 +219,55 @@ void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
va_end(ap);
}
+static void add_lines(struct strbuf *out,
+ const char *prefix1,
+ const char *prefix2,
+ const char *buf, size_t size)
+{
+ while (size) {
+ const char *prefix;
+ const char *next = memchr(buf, '\n', size);
+ next = next ? (next + 1) : (buf + size);
+
+ prefix = ((prefix2 && (buf[0] == '\n' || buf[0] == '\t'))
+ ? prefix2 : prefix1);
+ strbuf_addstr(out, prefix);
+ strbuf_add(out, buf, next - buf);
+ size -= next - buf;
+ buf = next;
+ }
+ strbuf_complete_line(out);
+}
+
+void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size)
+{
+ static char prefix1[3];
+ static char prefix2[2];
+
+ if (prefix1[0] != comment_line_char) {
+ sprintf(prefix1, "%c ", comment_line_char);
+ sprintf(prefix2, "%c", comment_line_char);
+ }
+ add_lines(out, prefix1, prefix2, buf, size);
+}
+
+void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...)
+{
+ va_list params;
+ struct strbuf buf = STRBUF_INIT;
+ int incomplete_line = sb->len && sb->buf[sb->len - 1] != '\n';
+
+ va_start(params, fmt);
+ strbuf_vaddf(&buf, fmt, params);
+ va_end(params);
+
+ strbuf_add_commented_lines(sb, buf.buf, buf.len);
+ if (incomplete_line)
+ sb->buf[--sb->len] = '\0';
+
+ strbuf_release(&buf);
+}
+
void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
{
int len;
@@ -300,19 +364,19 @@ ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
strbuf_grow(sb, hint ? hint : 8192);
for (;;) {
- ssize_t cnt;
+ ssize_t want = sb->alloc - sb->len - 1;
+ ssize_t got = read_in_full(fd, sb->buf + sb->len, want);
- cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
- if (cnt < 0) {
+ if (got < 0) {
if (oldalloc == 0)
strbuf_release(sb);
else
strbuf_setlen(sb, oldlen);
return -1;
}
- if (!cnt)
+ sb->len += got;
+ if (got < want)
break;
- sb->len += cnt;
strbuf_grow(sb, 8192);
}
@@ -350,6 +414,68 @@ int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
return -1;
}
+int strbuf_getcwd(struct strbuf *sb)
+{
+ size_t oldalloc = sb->alloc;
+ size_t guessed_len = 128;
+
+ for (;; guessed_len *= 2) {
+ strbuf_grow(sb, guessed_len);
+ if (getcwd(sb->buf, sb->alloc)) {
+ strbuf_setlen(sb, strlen(sb->buf));
+ return 0;
+ }
+ if (errno != ERANGE)
+ break;
+ }
+ if (oldalloc == 0)
+ strbuf_release(sb);
+ else
+ strbuf_reset(sb);
+ return -1;
+}
+
+#ifdef HAVE_GETDELIM
+int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
+{
+ ssize_t r;
+
+ if (feof(fp))
+ return EOF;
+
+ strbuf_reset(sb);
+
+ /* Translate slopbuf to NULL, as we cannot call realloc on it */
+ if (!sb->alloc)
+ sb->buf = NULL;
+ r = getdelim(&sb->buf, &sb->alloc, term, fp);
+
+ if (r > 0) {
+ sb->len = r;
+ return 0;
+ }
+ assert(r == -1);
+
+ /*
+ * Normally we would have called xrealloc, which will try to free
+ * memory and recover. But we have no way to tell getdelim() to do so.
+ * Worse, we cannot try to recover ENOMEM ourselves, because we have
+ * no idea how many bytes were read by getdelim.
+ *
+ * Dying here is reasonable. It mirrors what xrealloc would do on
+ * catastrophic memory failure. We skip the opportunity to free pack
+ * memory and retry, but that's unlikely to help for a malloc small
+ * enough to hold a single line of input, anyway.
+ */
+ if (errno == ENOMEM)
+ die("Out of memory, getdelim failed");
+
+ /* Restore slopbuf that we moved out of the way before */
+ if (!sb->buf)
+ strbuf_init(sb, 0);
+ return EOF;
+}
+#else
int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
{
int ch;
@@ -358,18 +484,22 @@ int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
return EOF;
strbuf_reset(sb);
- while ((ch = fgetc(fp)) != EOF) {
- strbuf_grow(sb, 1);
+ flockfile(fp);
+ while ((ch = getc_unlocked(fp)) != EOF) {
+ if (!strbuf_avail(sb))
+ strbuf_grow(sb, 1);
sb->buf[sb->len++] = ch;
if (ch == term)
break;
}
+ funlockfile(fp);
if (ch == EOF && sb->len == 0)
return EOF;
sb->buf[sb->len] = '\0';
return 0;
}
+#endif
int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
{
@@ -396,9 +526,10 @@ int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term)
return 0;
}
-int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
+ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
{
- int fd, len;
+ int fd;
+ ssize_t len;
fd = open(path, O_RDONLY);
if (fd < 0)
@@ -414,15 +545,33 @@ int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
void strbuf_add_lines(struct strbuf *out, const char *prefix,
const char *buf, size_t size)
{
- while (size) {
- const char *next = memchr(buf, '\n', size);
- next = next ? (next + 1) : (buf + size);
- strbuf_addstr(out, prefix);
- strbuf_add(out, buf, next - buf);
- size -= next - buf;
- buf = next;
+ add_lines(out, prefix, NULL, buf, size);
+}
+
+void strbuf_addstr_xml_quoted(struct strbuf *buf, const char *s)
+{
+ while (*s) {
+ size_t len = strcspn(s, "\"<>&");
+ strbuf_add(buf, s, len);
+ s += len;
+ switch (*s) {
+ case '"':
+ strbuf_addstr(buf, "&quot;");
+ break;
+ case '<':
+ strbuf_addstr(buf, "&lt;");
+ break;
+ case '>':
+ strbuf_addstr(buf, "&gt;");
+ break;
+ case '&':
+ strbuf_addstr(buf, "&amp;");
+ break;
+ case 0:
+ return;
+ }
+ s++;
}
- strbuf_complete_line(out);
}
static int is_rfc3986_reserved(char ch)
@@ -462,6 +611,50 @@ void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
strbuf_add_urlencode(sb, s, strlen(s), reserved);
}
+void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes)
+{
+ if (bytes > 1 << 30) {
+ strbuf_addf(buf, "%u.%2.2u GiB",
+ (int)(bytes >> 30),
+ (int)(bytes & ((1 << 30) - 1)) / 10737419);
+ } else if (bytes > 1 << 20) {
+ int x = bytes + 5243; /* for rounding */
+ strbuf_addf(buf, "%u.%2.2u MiB",
+ x >> 20, ((x & ((1 << 20) - 1)) * 100) >> 20);
+ } else if (bytes > 1 << 10) {
+ int x = bytes + 5; /* for rounding */
+ strbuf_addf(buf, "%u.%2.2u KiB",
+ x >> 10, ((x & ((1 << 10) - 1)) * 100) >> 10);
+ } else {
+ strbuf_addf(buf, "%u bytes", (int)bytes);
+ }
+}
+
+void strbuf_add_absolute_path(struct strbuf *sb, const char *path)
+{
+ if (!*path)
+ die("The empty string is not a valid path");
+ if (!is_absolute_path(path)) {
+ struct stat cwd_stat, pwd_stat;
+ size_t orig_len = sb->len;
+ char *cwd = xgetcwd();
+ char *pwd = getenv("PWD");
+ if (pwd && strcmp(pwd, cwd) &&
+ !stat(cwd, &cwd_stat) &&
+ (cwd_stat.st_dev || cwd_stat.st_ino) &&
+ !stat(pwd, &pwd_stat) &&
+ pwd_stat.st_dev == cwd_stat.st_dev &&
+ pwd_stat.st_ino == cwd_stat.st_ino)
+ strbuf_addstr(sb, pwd);
+ else
+ strbuf_addstr(sb, cwd);
+ if (sb->len > orig_len && !is_dir_sep(sb->buf[sb->len - 1]))
+ strbuf_addch(sb, '/');
+ free(cwd);
+ }
+ strbuf_addstr(sb, path);
+}
+
int printf_ln(const char *fmt, ...)
{
int ret;
@@ -485,3 +678,68 @@ int fprintf_ln(FILE *fp, const char *fmt, ...)
return -1;
return ret + 1;
}
+
+char *xstrdup_tolower(const char *string)
+{
+ char *result;
+ size_t len, i;
+
+ len = strlen(string);
+ result = xmalloc(len + 1);
+ for (i = 0; i < len; i++)
+ result[i] = tolower(string[i]);
+ result[i] = '\0';
+ return result;
+}
+
+char *xstrvfmt(const char *fmt, va_list ap)
+{
+ struct strbuf buf = STRBUF_INIT;
+ strbuf_vaddf(&buf, fmt, ap);
+ return strbuf_detach(&buf, NULL);
+}
+
+char *xstrfmt(const char *fmt, ...)
+{
+ va_list ap;
+ char *ret;
+
+ va_start(ap, fmt);
+ ret = xstrvfmt(fmt, ap);
+ va_end(ap);
+
+ 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);
+}
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