merge script: --squash, --ff from unborn branch are errors

diff --git a/quote.c b/quote.c
index 6a520855d6c418ecb1384ef9571b122b134af1af..63d3b018183abc05a5231dfd7e134dd7394f7a9b 100644 (file)
--- a/quote.c
+++ b/quote.c
@@ -72,7 +72,7 @@ void sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
        }
 }
 
-char *sq_dequote(char *arg)
+static char *sq_dequote_step(char *arg, char **next)
 {
        char *dst = arg;
        char *src = arg;
@@ -92,6 +92,8 @@ char *sq_dequote(char *arg)
                switch (*++src) {
                case '\0':
                        *dst = 0;
+                       if (next)
+                               *next = NULL;
                        return arg;
                case '\\':
                        c = *++src;
@@ -101,11 +103,40 @@ char *sq_dequote(char *arg)
                        }
                /* Fallthrough */
                default:
-                       return NULL;
+                       if (!next || !isspace(*src))
+                               return NULL;
+                       do {
+                               c = *++src;
+                       } while (isspace(c));
+                       *dst = 0;
+                       *next = src;
+                       return arg;
                }
        }
 }
 
+char *sq_dequote(char *arg)
+{
+       return sq_dequote_step(arg, NULL);
+}
+
+int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc)
+{
+       char *next = arg;
+
+       if (!*arg)
+               return 0;
+       do {
+               char *dequoted = sq_dequote_step(next, &next);
+               if (!dequoted)
+                       return -1;
+               ALLOC_GROW(*argv, *nr + 1, *alloc);
+               (*argv)[(*nr)++] = dequoted;
+       } while (next);
+
+       return 0;
+}
+
 /* 1 means: quote as octal
  * 0 means: quote as octal if (quote_path_fully)
  * -1 means: never quote
@@ -182,7 +213,7 @@ static size_t quote_c_style_counted(const char *name, ssize_t maxlen,
                int ch;
 
                len = next_quote_pos(p, maxlen);
-               if (len == maxlen || !p[len])
+               if (len == maxlen || (maxlen < 0 && !p[len]))
                        break;
 
                if (!no_dq && p == name)
@@ -192,6 +223,8 @@ static size_t quote_c_style_counted(const char *name, ssize_t maxlen,
                EMIT('\\');
                p += len;
                ch = (unsigned char)*p++;
+               if (maxlen >= 0)
+                       maxlen -= len + 1;
                if (sq_lookup[ch] >= ' ') {
                        EMIT(sq_lookup[ch]);
                } else {
@@ -241,8 +274,8 @@ void write_name_quoted(const char *name, FILE *fp, int terminator)
        fputc(terminator, fp);
 }
 
-extern void write_name_quotedpfx(const char *pfx, size_t pfxlen,
-                                 const char *name, FILE *fp, int terminator)
+void write_name_quotedpfx(const char *pfx, size_t pfxlen,
+                         const char *name, FILE *fp, int terminator)
 {
        int needquote = 0;
 
@@ -262,42 +295,75 @@ extern void write_name_quotedpfx(const char *pfx, size_t pfxlen,
        fputc(terminator, fp);
 }
 
-/* quote path as relative to the given prefix */
-char *quote_path_relative(const char *in, int len,
-                         struct strbuf *out, const char *prefix)
+static const char *path_relative(const char *in, int len,
+                                struct strbuf *sb, const char *prefix,
+                                int prefix_len);
+
+void write_name_quoted_relative(const char *name, size_t len,
+                               const char *prefix, size_t prefix_len,
+                               FILE *fp, int terminator)
 {
-       int needquote;
+       struct strbuf sb = STRBUF_INIT;
+
+       name = path_relative(name, len, &sb, prefix, prefix_len);
+       write_name_quoted(name, fp, terminator);
+
+       strbuf_release(&sb);
+}
+
+/*
+ * Give path as relative to prefix.
+ *
+ * The strbuf may or may not be used, so do not assume it contains the
+ * returned path.
+ */
+static const char *path_relative(const char *in, int len,
+                                struct strbuf *sb, const char *prefix,
+                                int prefix_len)
+{
+       int off, i;
 
        if (len < 0)
                len = strlen(in);
+       if (prefix && prefix_len < 0)
+               prefix_len = strlen(prefix);
+
+       off = 0;
+       i = 0;
+       while (i < prefix_len && i < len && prefix[i] == in[i]) {
+               if (prefix[i] == '/')
+                       off = i + 1;
+               i++;
+       }
+       in += off;
+       len -= off;
 
-       /* "../" prefix itself does not need quoting, but "in" might. */
-       needquote = next_quote_pos(in, len) < len;
-       strbuf_setlen(out, 0);
-       strbuf_grow(out, len);
-
-       if (needquote)
-               strbuf_addch(out, '"');
-       if (prefix) {
-               int off = 0;
-               while (prefix[off] && off < len && prefix[off] == in[off])
-                       if (prefix[off] == '/') {
-                               prefix += off + 1;
-                               in += off + 1;
-                               len -= off + 1;
-                               off = 0;
-                       } else
-                               off++;
-
-               for (; *prefix; prefix++)
-                       if (*prefix == '/')
-                               strbuf_addstr(out, "../");
+       if (i >= prefix_len)
+               return in;
+
+       strbuf_reset(sb);
+       strbuf_grow(sb, len);
+
+       while (i < prefix_len) {
+               if (prefix[i] == '/')
+                       strbuf_addstr(sb, "../");
+               i++;
        }
+       strbuf_add(sb, in, len);
+
+       return sb->buf;
+}
 
-       quote_c_style_counted (in, len, out, NULL, 1);
+/* quote path as relative to the given prefix */
+char *quote_path_relative(const char *in, int len,
+                         struct strbuf *out, const char *prefix)
+{
+       struct strbuf sb = STRBUF_INIT;
+       const char *rel = path_relative(in, len, &sb, prefix, -1);
+       strbuf_reset(out);
+       quote_c_style_counted(rel, strlen(rel), out, NULL, 0);
+       strbuf_release(&sb);
 
-       if (needquote)
-               strbuf_addch(out, '"');
        if (!out->len)
                strbuf_addstr(out, "./");