convert.c: guard config parser from value=NULL

diff --git a/convert.c b/convert.c
index 8dc9965081320c52152fb635354ee26a0ad693f7..552707e8e65997ebfc2120887783c4fc5698e19f 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;
        /*
@@ -192,15 +197,21 @@ static int crlf_to_worktree(const char *path, const char *src, size_t len,
        return 1;
 }
 
-static int filter_buffer(int fd, const char *src,
-                        unsigned long size, const char *cmd)
+struct filter_params {
+       const char *src;
+       unsigned long size;
+       const char *cmd;
+};
+
+static int filter_buffer(int fd, void *data)
 {
        /*
         * Spawn cmd and feed the buffer contents through its stdin.
         */
        struct child_process child_process;
+       struct filter_params *params = (struct filter_params *)data;
        int write_err, status;
-       const char *argv[] = { "sh", "-c", cmd, NULL };
+       const char *argv[] = { "sh", "-c", params->cmd, NULL };
 
        memset(&child_process, 0, sizeof(child_process));
        child_process.argv = argv;
@@ -208,17 +219,17 @@ static int filter_buffer(int fd, const char *src,
        child_process.out = fd;
 
        if (start_command(&child_process))
-               return error("cannot fork to run external filter %s", cmd);
+               return error("cannot fork to run external filter %s", params->cmd);
 
-       write_err = (write_in_full(child_process.in, src, size) < 0);
+       write_err = (write_in_full(child_process.in, params->src, params->size) < 0);
        if (close(child_process.in))
                write_err = 1;
        if (write_err)
-               error("cannot feed the input to external filter %s", cmd);
+               error("cannot feed the input to external filter %s", params->cmd);
 
        status = finish_command(&child_process);
        if (status)
-               error("external filter %s failed %d", cmd, -status);
+               error("external filter %s failed %d", params->cmd, -status);
        return (write_err || status);
 }
 
@@ -231,47 +242,36 @@ static int apply_filter(const char *path, const char *src, size_t len,
         *
         * (child --> cmd) --> us
         */
-       int pipe_feed[2];
-       int status, ret = 1;
-       struct child_process child_process;
+       int ret = 1;
        struct strbuf nbuf;
+       struct async async;
+       struct filter_params params;
 
        if (!cmd)
                return 0;
 
-       memset(&child_process, 0, sizeof(child_process));
-
-       if (pipe(pipe_feed) < 0) {
-               error("cannot create pipe to run external filter %s", cmd);
-               return 0;
-       }
+       memset(&async, 0, sizeof(async));
+       async.proc = filter_buffer;
+       async.data = &params;
+       params.src = src;
+       params.size = len;
+       params.cmd = cmd;
 
        fflush(NULL);
-       child_process.pid = fork();
-       if (child_process.pid < 0) {
-               error("cannot fork to run external filter %s", cmd);
-               close(pipe_feed[0]);
-               close(pipe_feed[1]);
-               return 0;
-       }
-       if (!child_process.pid) {
-               close(pipe_feed[0]);
-               exit(filter_buffer(pipe_feed[1], src, len, cmd));
-       }
-       close(pipe_feed[1]);
+       if (start_async(&async))
+               return 0;       /* error was already reported */
 
        strbuf_init(&nbuf, 0);
-       if (strbuf_read(&nbuf, pipe_feed[0], len) < 0) {
+       if (strbuf_read(&nbuf, async.out, len) < 0) {
                error("read from external filter %s failed", cmd);
                ret = 0;
        }
-       if (close(pipe_feed[0])) {
+       if (close(async.out)) {
                error("read from external filter %s failed", cmd);
                ret = 0;
        }
-       status = finish_command(&child_process);
-       if (status) {
-               error("external filter %s failed %d", cmd, -status);
+       if (finish_async(&async)) {
+               error("external filter %s failed", cmd);
                ret = 0;
        }
 
@@ -326,14 +326,14 @@ 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;
        }