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POReading Image from j2me to c++
 

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  1. POReading Image from j2me to c++
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    <p>I am learning c++ in order to create a little application which displays image stream. The images are coming from a j2me device which aren't stored as a file (so I just have the bytes).</p> <p>I am thinking I need to send the size of the image as an int first so then the client knows how much to read for that particular image in the stream.</p> <p>My problem is the size is always way too big - not the size of the image when I initially just try to read the size (I send this length in java server in a socket.write(int) and have tried dataoutputstream.writeInt). I will post some code as it's probably pretty simple. </p> <p>Why is the size different to what I send?</p> <pre><code> ssize_t readLine(int fd, char *buffer, size_t n) { ssize_t numRead, tt; /* # of bytes fetched by last read() */ size_t totRead; /* Total bytes read so far */ char *buf; char ch; if (n &lt;= 0 || buffer == NULL) { return -1; } buf = buffer; /* No pointer arithmetic on "void *" */ totRead = 0; for (;;) { numRead = read(fd, &amp;ch, 1); tt += numRead; if (numRead == -1) { return -1; /* Some other error */ } else if (numRead == 0) { /* EOF */ if (totRead == 0) /* No bytes read; return 0 */ return 0; else /* Some bytes read; add '\0' */ break; } else { /* 'numRead' must be 1 if we get here */ if (totRead &lt; n - 1) { /* Discard &gt; (n - 1) bytes */ totRead++; *buf++ = ch; } if (ch == '\n') break; } } printf("read line %s ", buf); fflush(stdout); int test = (int)buf; printf("read line int %i ", tt); fflush(stdout); *buf = '\0'; return totRead; </code></pre> <p>}</p>
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    1. USgnat
    1. USDanielle Buckley
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    1. COPlease compile with all warnings and debugging information (e.g. `g++ -Wall -g` on Linux), and learn to use the debugger (e.g. `gdb` on Linux) and memory leak-finding tools (e.g. `valgrind` on Linux). Also tell us on which operating system you are developing then running your application.
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      1. POReading Image from j2me to c++
      1. USBasile Starynkevitch
    2. CODo you mean debugger as opposed to printing to console? The os is playbook qnx platform.
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      1. POReading Image from j2me to c++
      1. USDanielle Buckley
    3. COI have trying to send an int for nearly 24 hours - please if someone can just tell me what stupid thing I am doing.
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      1. POReading Image from j2me to c++
      1. USDanielle Buckley
 

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