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greg |
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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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#include <stdio.h> |
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#include <rasterfile.h> |
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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int i; |
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for (i = 1; i < argc; i++) |
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fixfile(argv[i]); |
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if (argc == 1) |
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fixstream(stdin, stdout); |
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exit(0); |
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} |
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fixfile(name) |
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char *name; |
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{ |
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struct rasterfile head; |
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FILE *fp; |
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if ((fp = fopen(name, "r+")) == NULL) { |
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fprintf(stderr, "%s: cannon open for read/write\n", name); |
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exit(1); |
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} |
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if (fread((char *)&head, sizeof(head), 1, fp) != 1) { |
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fprintf(stderr, "%s: read error\n", name); |
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exit(1); |
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} |
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swapbytes((char *)&head, sizeof(head), sizeof(int)); |
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if (fseek(fp, 0L, 0) == -1) { |
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fprintf(stderr, "%s: seek error\n", name); |
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exit(1); |
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} |
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if (fwrite((char *)&head, sizeof(head), 1, fp) != 1 |
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|| fclose(fp) == -1) { |
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fprintf(stderr, "%s: write error\n", name); |
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exit(1); |
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} |
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} |
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fixstream(in, out) |
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register FILE *in, *out; |
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{ |
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struct rasterfile head; |
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register int c; |
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if (fread((char *)&head, sizeof(head), 1, in) != 1) { |
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fprintf(stderr, "read error\n"); |
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exit(1); |
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} |
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swapbytes((char *)&head, sizeof(head), sizeof(int)); |
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fwrite((char *)&head, sizeof(head), 1, out); |
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while ((c = getc(in)) != EOF) |
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putc(c, out); |
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if (ferror(out)) { |
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fprintf(stderr, "write error\n"); |
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exit(1); |
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} |
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} |
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swapbytes(top, size, width) |
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char *top; |
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int size, width; |
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{ |
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register char *b, *e; |
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register int c; |
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for ( ; size > 0; size -= width, top += width) { |
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b = top; e = top+width-1; |
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while (b < e) { |
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c = *e; |
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*e-- = *b; |
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*b++ = c; |
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} |
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} |
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} |
