1 files changed, 151 insertions, 0 deletions
diff --git a/mzf2wav/src/args.c b/mzf2wav/src/args.c
new file mode 100644
index 0000000..0bbf73f
--- /dev/null
+++ b/mzf2wav/src/args.c
@@ -0,0 +1,151 @@
+#include <stdio.h>
+#include <stdlib.h> // Just to remove a warning (exit).
+#include "args.h"
+#include "methods.h"
+
+// Externs.
+extern int speed_1,
+           speed_2,
+           corr_1,
+           corr_2;
+extern char *filename,
+            *outfile;
+extern void (*method)(byte *);
+
+// Private function prototypes.
+int chtoi(char *), // Convert the first char of a string to an integer.
+    stoi(char *);  // Convert a string to an integer.
+
+// Private functions.
+// Convert the first char of a string to an integer and check the boundries.
+int chtoi(char *string) {
+  int temp = 0;
+  
+  if (!string)
+    return -1;
+  temp = (int)string[0] - 48;
+  if ((temp < 0) || (temp > 4))
+    return -1;
+  return temp;
+}//chtoi
+
+// Convert the a string to an integer and check the boundries.
+int stoi(char *string) {
+  int i = 0,
+      m = 1,
+      temp = 0,
+      ret = 0;
+  
+  if (!string)
+    return -100;
+  if (string[0] == '-') {
+    m = -1;
+    i++;
+  }//if
+    
+  while (string[i]) {
+    temp = (int)string[i] - 48;
+    if ((temp < 0) || (temp > 9))
+      return -100;
+    ret *= 10;
+    ret += temp;
+    i++;
+  }//while
+  if (ret > 50)
+    return -100;
+  return m * ret;
+}//stoi
+
+// Public functions.
+// Print usage and return an error code.
+void error(int i) {
+  printf("Usage: mzf2wav <-i n> <-t n> <-1 n> <-2 n> <-c> <-s> <-w> in out\n"
+         " -i sets initial speed mode (0, 1, 2, 3 or 4), default = 0.\n"
+         " -t sets turbo speed mode (0, 1, 2, 3 or 4), default = 2.\n"
+         " -1 sets correction for fast initial mode (-50 to 50).\n"
+         " -2 sets correction for fast turbo mode (-50 to 50).\n"
+         " -c sets conventional writing mode.\n"
+         " -s sets fast writing mode (default).\n"
+         " -w sets turbo writing mode.\n"
+         " -p reverse polarity.\n");
+  exit(i);
+}//error
+
+// Set the configuration variables.
+int setvars(int argc, char **argv) {
+  int temp = 0,
+      i = 1;
+  
+  while (i < argc) {
+    if (argv[i][0] == '-')
+      switch (argv[i][1]) {
+        case 'i':                                   // Initial write speed.
+          temp = chtoi(argv[i + 1]);
+          if (temp == -1) {
+            printf("No valid initial speed given.\n");
+            error(1);
+          }//if
+          speed_1 = temp;
+          i++;
+          break;
+        case 't':                                   // Turbo write speed.
+          temp = chtoi(argv[i + 1]);
+          if (temp == -1) {
+            printf("No valid turbo speed given.\n");
+            error(1);
+          }//if
+          speed_2 = temp;
+          i++;
+          break;
+        case '1':                                   // Initial fast correction.
+          temp = stoi(argv[i + 1]);
+          if (temp == -100) {
+            printf("No valid fast initial correction given.\n");
+            error(1);
+          }//if
+          corr_1 = temp;
+          i++;
+          break;
+        case '2':                                   // Initial fast correction.
+          temp = stoi(argv[i + 1]);
+          if (temp == -100) {
+            printf("No valid fast turbo correction given.\n");
+            error(1);
+          }//if
+          corr_2 = temp;
+          i++;
+          break;
+        case 'c':
+          method = conv;
+          break;
+        case 's':
+          method = trans;
+          break;
+        case 'w':
+          method = turbo;
+          break;
+        case 'p':
+          reversepol();
+          break;
+        default:
+          printf("Unknown option: %s\n", argv[i]);
+          error(1);
+      }//switch
+    else
+      if (!filename)
+        filename = argv[i];
+      else
+        outfile = argv[i];
+    i++;
+  }//while
+  if (!filename) {
+    printf("No filename given.\n");
+    error(1);
+  }//if
+  if (!outfile) {
+    printf("No output filename given.\n");
+    error(1);
+  }//if
+    
+  return 0;
+}//setvars