bedwarf: always use custom abbrev numbers

[libfirm] / support / libfirmprof / instrument.c

diff --git a/support/libfirmprof/instrument.c b/support/libfirmprof/instrument.c
index b387b83..18db0b5 100644 (file)
--- a/support/libfirmprof/instrument.c
+++ b/support/libfirmprof/instrument.c
@@ -19,17 +19,39 @@ typedef struct _profile_counter_t {
 
 static profile_counter_t *counters = NULL;
 
+/**
+ * Write counter values to profiling output file.
+ * We define our output format to be a sequence of 32-bit unsigned integer
+ * values stored in little endian format.
+ */
+void write_little_endian(unsigned *counter, unsigned len, FILE *f)
+{
+       unsigned i;
+
+       for (i = 0; i < len; ++i) {
+               unsigned      v = counter[i];
+               unsigned char bytes[4];
+
+               bytes[0] = ((v >>  0) & 0xff);
+               bytes[1] = ((v >>  8) & 0xff);
+               bytes[2] = ((v >> 16) & 0xff);
+               bytes[3] = ((v >> 24) & 0xff);
+
+               fwrite(bytes, 1, 4, f);
+       }
+}
+
 static void write_profiles(void)
 {
        profile_counter_t *counter = counters;
-       while(counter != NULL) {
+       while (counter != NULL) {
                profile_counter_t *next = counter->next;
                FILE *f = fopen(counter->filename, "wb");
                if (f == NULL) {
                        perror("Warning: couldn't open file for writing profiling data");
                } else {
                        fputs("firmprof", f);
-                       fwrite(counter->counters, counter->len * sizeof(unsigned), 1, f);
+                       write_little_endian(counter->counters, counter->len, f);
                        fclose(f);
                }
                free(counter);