ajout programme c traitement héxa vers décimal

gbgb2.c

@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+
+typedef struct {
+  uint8_t octet1;
+  uint8_t octet2;
+  uint8_t octet3;
+  uint8_t octet4;
+} quartet;
+
+int main ( int argc, char **argv)
+{
+  int i;
+  char buff[26];
+  char buff2[18];
+  int32_t values[8];
+  uint32_t valbin[8];
+  quartet value;
+
+  while (fread(&buff, 26, 1, stdin)) {
+    /*buff[25] = '\0';*/
+    if (strncmp(buff, "#################\n", (size_t)18) == 0) {
+      if (!(fread(&buff2, 18, 1, stdin))) {
+        fprintf(stderr, "Erreur lesture après ###...#");
+        return(1);
+      } else {
+        /*buff2[17] = '\0';*/
+        strncpy(buff, &buff[18], 8);
+        strncpy(&buff[8], buff2, 18);
+      }
+    }
+
+
+    i = 3;
+
+    value.octet1 = buff[3*i+1];
+    value.octet2 = buff[3*i+2];
+    value.octet3 = buff[3*i+3];
+    value.octet4 = 0;
+    /*memcpy(&values[i], &value, sizeof(quartet));*/
+
+    valbin[i] = buff[3*i+1]*256*256*256 + buff[3*i+2]*256*256 + buff[3*i+3]*256;
+    memcpy(&values[i], &valbin[i], sizeof(int32_t));
+
+    if (value.octet1 & 0b10000000) {
+      printf("Valeur négative trouvée: %02x %02x %02x %d\n", value.octet1, value.octet2, value.octet3, values[i]);
+    }
+    fprintf(stdout, "%02x %02x %02x %d", value.octet1, value.octet2, value.octet3, values[i]/256);
+
+/*
+    for (i=1; i<25; i++) {
+      fprintf(stdout, "%02x ", buff[i]);
+    }
+*/
+    printf("\n");
+  }
+}