99 lines
1.5 KiB
C
99 lines
1.5 KiB
C
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/* escape.c
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Translate escape sequences. */
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#include "uucp.h"
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#include <ctype.h>
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#include "uudefs.h"
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size_t
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cescape (z)
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char *z;
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{
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char *zto, *zfrom;
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zto = z;
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zfrom = z;
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while (*zfrom != '\0')
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{
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if (*zfrom != '\\')
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{
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*zto++ = *zfrom++;
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continue;
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}
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++zfrom;
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switch (*zfrom)
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{
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case '-':
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*zto++ = '-';
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break;
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case 'b':
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*zto++ = '\b';
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break;
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case 'n':
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*zto++ = '\n';
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break;
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case 'N':
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*zto++ = '\0';
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break;
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case 'r':
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*zto++ = '\r';
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break;
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case 's':
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*zto++ = ' ';
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break;
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case 't':
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*zto++ = '\t';
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break;
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case '\0':
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--zfrom;
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/* Fall through. */
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case '\\':
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*zto++ = '\\';
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break;
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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{
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int i;
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i = *zfrom - '0';
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if (zfrom[1] >= '0' && zfrom[1] <= '7')
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i = 8 * i + *++zfrom - '0';
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if (zfrom[1] >= '0' && zfrom[1] <= '7')
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i = 8 * i + *++zfrom - '0';
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*zto++ = (char) i;
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}
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break;
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case 'x':
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{
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int i;
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i = 0;
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while (isxdigit (BUCHAR (zfrom[1])))
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{
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if (isdigit (BUCHAR (zfrom[1])))
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i = 16 * i + *++zfrom - '0';
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else if (isupper (BUCHAR (zfrom[1])))
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i = 16 * i + *++zfrom - 'A' + 10;
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else
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i = 16 * i + *++zfrom - 'a' + 10;
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}
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*zto++ = (char) i;
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}
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break;
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default:
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ulog (LOG_ERROR, "Unrecognized escape sequence \\%c",
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*zfrom);
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*zto++ = *zfrom;
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break;
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}
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++zfrom;
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}
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*zto = '\0';
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return (size_t) (zto - z);
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}
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