108 lines
2.0 KiB
C
108 lines
2.0 KiB
C
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/*
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** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
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** distribution information.
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*/
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#include "rfc2045.h"
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#include <ctype.h>
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#include <string.h>
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/* $Id$ */
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static void start_rwprep(struct rfc2045 *);
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static void do_rwprep(const char *, size_t);
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static void end_rwprep();
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static struct rfc2045ac rfc2045acprep={
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&start_rwprep,
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&do_rwprep,
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&end_rwprep};
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static struct rfc2045 *currwp;
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static int curlinepos=0;
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typedef enum {
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raw,
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quotedprint,
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qpseeneq,
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qpseeneqh,
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base64} state_t;
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static state_t curstate;
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static int statechar;
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#define h2nyb(c) ( (c) >= 'a' && (c) <= 'f' ? (c)-('a'-10): \
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(c) >= 'A' && (c) <= 'F' ? (c)-('A'-10): (c)-'0')
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struct rfc2045 *rfc2045_alloc_ac()
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{
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struct rfc2045 *p=rfc2045_alloc();
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if (p) p->rfc2045acptr= &rfc2045acprep;
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currwp=0;
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return (p);
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}
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static void start_rwprep(struct rfc2045 *p)
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{
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currwp=p;
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curlinepos=0;
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curstate=raw;
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if (p->content_transfer_encoding)
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{
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if (strcmp(p->content_transfer_encoding,
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"quoted-printable") == 0)
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curstate=quotedprint;
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else if (strcmp(p->content_transfer_encoding, "base64") == 0)
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curstate=base64;
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}
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}
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static void do_rwprep(const char * p, size_t n)
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{
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if (!currwp) return;
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for ( ; n; --n, ++p)
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switch (curstate) {
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case quotedprint:
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if (*p == '=')
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{
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curstate=qpseeneq;
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continue;
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}
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/* FALLTHRU */
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case raw:
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if (*p == '\r' || *p == '\n')
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curlinepos=0;
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else if (++curlinepos > 500)
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currwp->haslongline=1;
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if ((unsigned char)*p >= 127)
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currwp->has8bitchars=1;
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break;
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case qpseeneq:
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if (*p == '\n')
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{
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curstate=quotedprint;
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continue;
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}
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if (isspace((int)(unsigned char)*p)) continue; /* Ignore WSP */
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statechar=*p;
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curstate=qpseeneqh;
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continue;
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case qpseeneqh:
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curstate=quotedprint;
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if ( (unsigned char)
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( (h2nyb(statechar) << 4) + h2nyb(*p) ) >= 127
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) currwp->has8bitchars=1;
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if (++curlinepos > 500)
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currwp->haslongline=1;
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continue;
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case base64:
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break;
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}
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}
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static void end_rwprep()
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{
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}
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