57 lines
957 B
C
57 lines
957 B
C
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/*
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* mactrans.c -- Hack filter used to generate MPW files
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* with special characters from pure ASCII, denoted "%nn"
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* where nn is hex. (except for "%%", which is literal '%').
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*
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* calling sequence:
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*
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* catenate file | mactrans [-toascii | -fromascii] > output
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*
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* Written by: Niles Ritter.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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void to_ascii(void);
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void from_ascii(void);
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main(int argc, char *argv[])
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{
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if (argc<2 || argv[1][1]=='f') from_ascii();
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else to_ascii();
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exit (0);
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}
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void from_ascii(void)
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{
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char c;
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int d;
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while ((c=getchar())!=EOF)
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{
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if (c!='%' || (c=getchar())=='%') putchar(c);
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else
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{
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ungetc(c,stdin);
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scanf("%2x",&d);
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*((unsigned char *)&c) = d;
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putchar(c);
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}
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}
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}
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void to_ascii(void)
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{
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char c;
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int d;
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while ((c=getchar())!=EOF)
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{
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if (isascii(c)) putchar (c);
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else
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{
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d = *((unsigned char *)&c);
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printf("%%%2x",d);
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}
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}
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}
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