tr portability fixes

diff --git a/convert.c b/convert.c
index 4df75595b1f3e689a9685039c372ffb4c8688291..d8c94cb3edeceff7a79b2f5e6ba7cad250e6b301 100644 (file)
--- a/convert.c
+++ b/convert.c
@@ -17,8 +17,8 @@
 #define CRLF_INPUT     2
 
 struct text_stat {
-       /* CR, LF and CRLF counts */
-       unsigned cr, lf, crlf;
+       /* NUL, CR, LF and CRLF counts */
+       unsigned nul, cr, lf, crlf;
 
        /* These are just approximations! */
        unsigned printable, nonprintable;
@@ -51,6 +51,9 @@ static void gather_stats(const char *buf, unsigned long size, struct text_stat *
                        case '\b': case '\t': case '\033': case '\014':
                                stats->printable++;
                                break;
+                       case 0:
+                               stats->nul++;
+                               /* fall through */
                        default:
                                stats->nonprintable++;
                        }
@@ -66,6 +69,8 @@ static void gather_stats(const char *buf, unsigned long size, struct text_stat *
 static int is_binary(unsigned long size, struct text_stat *stats)
 {
 
+       if (stats->nul)
+               return 1;
        if ((stats->printable >> 7) < stats->nonprintable)
                return 1;
        /*
@@ -80,8 +85,39 @@ static int is_binary(unsigned long size, struct text_stat *stats)
        return 0;
 }
 
+static void check_safe_crlf(const char *path, int action,
+                            struct text_stat *stats, enum safe_crlf checksafe)
+{
+       if (!checksafe)
+               return;
+
+       if (action == CRLF_INPUT || auto_crlf <= 0) {
+               /*
+                * CRLFs would not be restored by checkout:
+                * check if we'd remove CRLFs
+                */
+               if (stats->crlf) {
+                       if (checksafe == SAFE_CRLF_WARN)
+                               warning("CRLF will be replaced by LF in %s.", path);
+                       else /* i.e. SAFE_CRLF_FAIL */
+                               die("CRLF would be replaced by LF in %s.", path);
+               }
+       } else if (auto_crlf > 0) {
+               /*
+                * CRLFs would be added by checkout:
+                * check if we have "naked" LFs
+                */
+               if (stats->lf != stats->crlf) {
+                       if (checksafe == SAFE_CRLF_WARN)
+                               warning("LF will be replaced by CRLF in %s", path);
+                       else /* i.e. SAFE_CRLF_FAIL */
+                               die("LF would be replaced by CRLF in %s", path);
+               }
+       }
+}
+
 static int crlf_to_git(const char *path, const char *src, size_t len,
-                       struct strbuf *buf, int action)
+                       struct strbuf *buf, int action, enum safe_crlf checksafe)
 {
        struct text_stat stats;
        char *dst;
@@ -90,9 +126,6 @@ static int crlf_to_git(const char *path, const char *src, size_t len,
                return 0;
 
        gather_stats(src, len, &stats);
-       /* No CR? Nothing to convert, regardless. */
-       if (!stats.cr)
-               return 0;
 
        if (action == CRLF_GUESS) {
                /*
@@ -110,6 +143,12 @@ static int crlf_to_git(const char *path, const char *src, size_t len,
                        return 0;
        }
 
+       check_safe_crlf(path, action, &stats, checksafe);
+
+       /* Optimization: No CR? Nothing to convert, regardless. */
+       if (!stats.cr)
+               return 0;
+
        /* only grow if not in place */
        if (strbuf_avail(buf) + buf->len < len)
                strbuf_grow(buf, len - buf->len);
@@ -321,14 +360,14 @@ static int read_convert_config(const char *var, const char *value)
 
        if (!strcmp("smudge", ep)) {
                if (!value)
-                       return error("%s: lacks value", var);
+                       return config_error_nonbool(var);
                drv->smudge = strdup(value);
                return 0;
        }
 
        if (!strcmp("clean", ep)) {
                if (!value)
-                       return error("%s: lacks value", var);
+                       return config_error_nonbool(var);
                drv->clean = strdup(value);
                return 0;
        }
@@ -531,7 +570,8 @@ static int git_path_check_ident(const char *path, struct git_attr_check *check)
        return !!ATTR_TRUE(value);
 }
 
-int convert_to_git(const char *path, const char *src, size_t len, struct strbuf *dst)
+int convert_to_git(const char *path, const char *src, size_t len,
+                   struct strbuf *dst, enum safe_crlf checksafe)
 {
        struct git_attr_check check[3];
        int crlf = CRLF_GUESS;
@@ -553,7 +593,7 @@ int convert_to_git(const char *path, const char *src, size_t len, struct strbuf
                src = dst->buf;
                len = dst->len;
        }
-       ret |= crlf_to_git(path, src, len, dst, crlf);
+       ret |= crlf_to_git(path, src, len, dst, crlf, checksafe);
        if (ret) {
                src = dst->buf;
                len = dst->len;