Examples/plconvert.c

   1 // Mac OS X: llvm-gcc -F<path-to-CFLite-framework> -framework CoreFoundation Examples/plconvert.c -o plconvert
   2
   3 // Linux: clang -I/usr/local/include -L/usr/local/lib -lCoreFoundation plconvert.c -o plconvert
   4
   5 /*
   6  This example shows usage of CFString, CFData, and other CFPropertyList types. It takes two arguments:
   7     1. A property list file to read, in either binary or XML property list format.
   8     2. A file name to write a converted property list file to.
   9  If the first input is binary, the output is XML and vice-versa.
  10 */
  11
  12 #include <sys/types.h>
  13 #include <sys/stat.h>
  14 #include <fcntl.h>
  15 #include <string.h>
  16 #include <stdio.h>
  17 #include <unistd.h>
  18
  19 #include <CoreFoundation/CoreFoundation.h>
  20
  21 static void logIt(CFStringRef format, ...) {
  22     va_list args;
  23     va_start(args, format);
  24     CFStringRef str = CFStringCreateWithFormatAndArguments(kCFAllocatorSystemDefault, NULL, format, args);
  25     if (!str) return;
  26
  27     CFIndex blen = CFStringGetMaximumSizeForEncoding(CFStringGetLength(str), kCFStringEncodingUTF8);
  28     char *buf = str ? (char *)malloc(blen + 1) : 0;
  29     if (buf) {
  30         Boolean converted = CFStringGetCString(str, buf, blen, kCFStringEncodingUTF8);
  31         if (converted) {
  32             // null-terminate
  33             buf[blen] = 0;
  34             printf("%s\n", buf);
  35         }
  36     }
  37     if (buf) free(buf);
  38     if (str) CFRelease(str);      va_end(args);
  39 }
  40
  41 static CFMutableDataRef createDataFromFile(const char *fname) {
  42     int fd = open(fname, O_RDONLY);
  43     CFMutableDataRef res = CFDataCreateMutable(kCFAllocatorSystemDefault, 0);
  44     char buf[4096];
  45
  46     ssize_t amountRead;
  47     while ((amountRead = read(fd, buf, 4096)) > 0) {
  48         CFDataAppendBytes(res, (const UInt8 *)buf, amountRead);
  49     }
  50
  51     close(fd);
  52     return res;
  53 }
  54
  55 static bool writeDataToFile(CFDataRef data, const char *fname) {
  56     int fd = open(fname, O_WRONLY | O_CREAT | O_TRUNC, 0666);
  57     if (fd < 0) {
  58         printf("There was an error creating the file: %d", errno);
  59         return false;
  60     }
  61     int dataLen = CFDataGetLength(data);
  62     int w = write(fd, CFDataGetBytePtr(data), dataLen);
  63     fsync(fd);
  64     close(fd);
  65     if (w != dataLen) return false;
  66     return true;
  67 }
  68
  69 int main(int argc, char **argv) {
  70
  71     if (argc != 3) {
  72         printf("Usage: plconvert <in file> <out file>\nIf the in file is an XML property list, convert to binary property list in out file. If the in file is a binary property list, convert to XML property list in out file.\n");
  73     } else {
  74         CFMutableDataRef plistData = createDataFromFile(argv[1]);
  75         if (!plistData) {
  76             printf("Unable to create data from file name: %s", argv[1]);
  77         } else {
  78             CFPropertyListFormat fmt;
  79             CFErrorRef err;
  80             CFPropertyListRef plist = CFPropertyListCreateWithData(kCFAllocatorSystemDefault, (CFDataRef)plistData, 0, &fmt, &err);
  81             if (!plist) {
  82                 logIt(CFSTR("Unable to create property list from data: %@"), err);
  83             } else {
  84                 logIt(CFSTR("Property list contents:\n%@"), plist);
  85                 if (fmt == kCFPropertyListBinaryFormat_v1_0) {
  86                     logIt(CFSTR("Converting to XML property list at: %s"), argv[2]);
  87                     fmt = kCFPropertyListXMLFormat_v1_0;
  88                 } else if (fmt == kCFPropertyListXMLFormat_v1_0) {
  89                     logIt(CFSTR("Converting to binary property list at: %s"), argv[2]);
  90                     fmt = kCFPropertyListBinaryFormat_v1_0;
  91                 } else {
  92                     logIt(CFSTR("Unknown property list format! Not converting output format."));
  93                 }
  94
  95                 CFDataRef outputData = CFPropertyListCreateData(kCFAllocatorSystemDefault, plist, fmt, 0, &err);
  96                 if (!outputData) {
  97                     logIt(CFSTR("Unable to write property list to data: %@"), err);
  98                 } else {
  99                     bool success = writeDataToFile(outputData, argv[2]);
 100                     if (!success) {
 101                         logIt(CFSTR("Unable to write data to file"));
 102                     }
 103                     CFRelease(outputData);
 104                 }
 105                 CFRelease(plist);
 106             }
 107             CFRelease(plistData);
 108         }
 109     }
 110 }