shithub: jbig2

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jbig2dec: Avoid formatting error messages twice in error callback.

--- a/jbig2dec.c

+++ b/jbig2dec.c

@@ -70,7 +70,7 @@

 typedef struct {

     int verbose;

-    char *last_message;

+    const char *last_message;

     Jbig2Severity severity;

     char *type;

     long repeats;

@@ -372,12 +372,11 @@

 }

 static void

-error_callback(void *error_callback_data, const char *buf, Jbig2Severity severity, uint32_t seg_idx)

+error_callback(void *error_callback_data, const char *message, Jbig2Severity severity, uint32_t seg_idx)

 {

     jbig2dec_error_callback_state_t *state = (jbig2dec_error_callback_state_t *) error_callback_data;

     char *type;

-    int len;

-    char *message;

+    int ret;

     switch (severity) {

     case JBIG2_SEVERITY_DEBUG:

@@ -403,30 +402,21 @@

         break;

     }

-    /* Worst case length using format "jbig2dec %s %s (segment 0x%02x)".

-    strlen("jbig2dec ") +

-    strlen(type) + strlen(" ") +

-    strlen(buf) + strlen(" ") +

-    strlen("(segment 0x") + strlen("4294967296") + strlen(")") +

-    1 for trailing NUL. The constant parts amount to 45 bytes. */

-    len = 45;

-    len += strlen(type);

-    len += strlen(buf);

+    if (state->last_message == NULL || (state->last_message != NULL && strcmp(message, state->last_message) && state->severity == severity && state->type == type)) {

+        if (state->repeats > 1)

+        {

+            ret = fprintf(stderr, "jbig2dec %s last message repeated %ld times\n", state->type, state->repeats);

+            if (ret < 0)

+                goto printerror;

+        }

-    message = malloc(len + 1);

-    if (message == NULL) {

-        return;

-    }

-    if (seg_idx == JBIG2_UNKNOWN_SEGMENT_NUMBER)

-        snprintf(message, len + 1, "jbig2dec %s %s", type, buf);

-    else

-        snprintf(message, len + 1, "jbig2dec %s %s (segment 0x%02x)", type, buf, seg_idx);

+        if (seg_idx == JBIG2_UNKNOWN_SEGMENT_NUMBER)

+            ret = fprintf(stderr, "jbig2dec %s %s\n", type, message);

+        else

+            ret = fprintf(stderr, "jbig2dec %s %s (segment 0x%08x)\n", type, message, seg_idx);

+        if (ret < 0)

+            goto printerror;

-    if (state->last_message != NULL && strcmp(message, state->last_message)) {

-        if (state->repeats > 1)

-            fprintf(stderr, "jbig2dec %s last message repeated %ld times\n", state->type, state->repeats);

-        fprintf(stderr, "%s\n", message);

-        free(state->last_message);

         state->last_message = message;

         state->severity = severity;

         state->type = type;

@@ -433,16 +423,19 @@

         state->repeats = 0;

     } else if (state->last_message != NULL) {

         state->repeats++;

-        if (state->repeats % 1000000 == 0)

-            fprintf(stderr, "jbig2dec %s last message repeated %ld times so far\n", state->type, state->repeats);

-        free(message);

-    } else if (state->last_message == NULL) {

-        fprintf(stderr, "%s\n", message);

-        state->last_message = message;

-        state->severity = severity;

-        state->type = type;

-        state->repeats = 0;

+        if (state->repeats % 1000000 == 0) {

+            ret = fprintf(stderr, "jbig2dec %s last message repeated %ld times so far\n", state->type, state->repeats);

+            if (ret < 0)

+                goto printerror;

+        }

     }

+

+    return;

+

+printerror:

+    fprintf(stderr, "jbig2dec WARNING could not print message\n");

+    state->last_message = NULL;

+    state->repeats = 0;

 }

 static void

@@ -748,8 +741,6 @@

 cleanup:

     flush_errors(&error_callback_state);

     jbig2_ctx_free(ctx);

-    if (error_callback_state.last_message)

-        free(error_callback_state.last_message);

     if (params.output_filename)

         free(params.output_filename);

     if (params.hash)