| 1 | /* pe2ps.c - presentation element to presentation stream */ |
| 2 | |
| 3 | #ifndef lint |
| 4 | static char *rcsid = "$Header: /f/osi/psap/RCS/pe2ps.c,v 7.1 91/02/22 09:36:01 mrose Interim $"; |
| 5 | #endif |
| 6 | |
| 7 | /* |
| 8 | * $Header: /f/osi/psap/RCS/pe2ps.c,v 7.1 91/02/22 09:36:01 mrose Interim $ |
| 9 | * |
| 10 | * |
| 11 | * $Log: pe2ps.c,v $ |
| 12 | * Revision 7.1 91/02/22 09:36:01 mrose |
| 13 | * Interim 6.8 |
| 14 | * |
| 15 | * Revision 7.0 89/11/23 22:12:56 mrose |
| 16 | * Release 6.0 |
| 17 | * |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * NOTICE |
| 22 | * |
| 23 | * Acquisition, use, and distribution of this module and related |
| 24 | * materials are subject to the restrictions of a license agreement. |
| 25 | * Consult the Preface in the User's Manual for the full terms of |
| 26 | * this agreement. |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | |
| 31 | /* LINTLIBRARY */ |
| 32 | |
| 33 | #include <stdio.h> |
| 34 | #include "psap.h" |
| 35 | #include "tailor.h" |
| 36 | |
| 37 | /* \f DATA */ |
| 38 | |
| 39 | static PElement pe_eoc = { PE_CLASS_UNIV, PE_FORM_PRIM, PE_UNIV_EOC, 0 }; |
| 40 | |
| 41 | /* \f */ |
| 42 | |
| 43 | int pe2ps_aux (ps, pe, eval) |
| 44 | register PS ps; |
| 45 | register PE pe; |
| 46 | int eval; |
| 47 | { |
| 48 | int result; |
| 49 | |
| 50 | if (eval > 0) |
| 51 | switch (pe -> pe_form) { |
| 52 | case PE_FORM_PRIM: |
| 53 | case PE_FORM_ICONS: |
| 54 | break; |
| 55 | |
| 56 | case PE_FORM_CONS: |
| 57 | (void) ps_get_abs (pe); |
| 58 | break; |
| 59 | } |
| 60 | |
| 61 | if ((result = pe2ps_aux2 (ps, pe, eval)) != NOTOK) |
| 62 | result = ps_flush (ps); |
| 63 | |
| 64 | return result; |
| 65 | } |
| 66 | |
| 67 | |
| 68 | static int pe2ps_aux2 (ps, pe, eval) |
| 69 | register PS ps; |
| 70 | register PE pe; |
| 71 | int eval; |
| 72 | { |
| 73 | register PE p; |
| 74 | |
| 75 | if (pe -> pe_form == PE_FORM_ICONS) { |
| 76 | if (ps_write_aux (ps, pe -> pe_prim, pe -> pe_len, 1) == NOTOK) |
| 77 | return NOTOK; |
| 78 | |
| 79 | return OK; |
| 80 | } |
| 81 | |
| 82 | if (ps_write_id (ps, pe) == NOTOK || ps_write_len (ps, pe) == NOTOK) |
| 83 | return NOTOK; |
| 84 | |
| 85 | switch (pe -> pe_form) { |
| 86 | case PE_FORM_PRIM: |
| 87 | if (ps_write_aux (ps, pe -> pe_prim, pe -> pe_len, 1) == NOTOK) |
| 88 | return NOTOK; |
| 89 | break; |
| 90 | |
| 91 | case PE_FORM_CONS: |
| 92 | if (eval < 0) |
| 93 | break; |
| 94 | if (pe -> pe_len) { |
| 95 | for (p = pe -> pe_cons; p; p = p -> pe_next) |
| 96 | if (pe2ps_aux2 (ps, p, 0) == NOTOK) |
| 97 | return NOTOK; |
| 98 | |
| 99 | if (pe -> pe_len == PE_LEN_INDF |
| 100 | && pe2ps_aux2 (ps, &pe_eoc, 0) == NOTOK) |
| 101 | return NOTOK; |
| 102 | } |
| 103 | break; |
| 104 | } |
| 105 | |
| 106 | return OK; |
| 107 | } |
| 108 | |
| 109 | /* \f */ |
| 110 | |
| 111 | static int ps_write_id (ps, pe) |
| 112 | register PS ps; |
| 113 | register PE pe; |
| 114 | { |
| 115 | byte buffer[1 + sizeof (PElementID)]; |
| 116 | register byte *bp = buffer; |
| 117 | PElementForm form; |
| 118 | register PElementID id; |
| 119 | |
| 120 | if ((form = pe -> pe_form) == PE_FORM_ICONS) |
| 121 | form = PE_FORM_CONS; |
| 122 | *bp = ((pe -> pe_class << PE_CLASS_SHIFT) & PE_CLASS_MASK) |
| 123 | | ((form << PE_FORM_SHIFT) & PE_FORM_MASK); |
| 124 | |
| 125 | if ((id = pe -> pe_id) < PE_ID_XTND) |
| 126 | *bp++ |= id; |
| 127 | else { |
| 128 | register byte *ep; |
| 129 | register PElementID jd; |
| 130 | |
| 131 | *bp |= PE_ID_XTND; |
| 132 | |
| 133 | ep = buffer; |
| 134 | for (jd = id; jd != 0; jd >>= PE_ID_SHIFT) |
| 135 | ep++; |
| 136 | |
| 137 | for (bp = ep; id != 0; id >>= PE_ID_SHIFT) |
| 138 | *bp-- = id & PE_ID_MASK; |
| 139 | for (bp = buffer + 1; bp < ep; bp++) |
| 140 | *bp |= PE_ID_MORE; |
| 141 | |
| 142 | bp = ++ep; |
| 143 | } |
| 144 | |
| 145 | if (ps_write (ps, buffer, bp - buffer) == NOTOK) |
| 146 | return NOTOK; |
| 147 | |
| 148 | return OK; |
| 149 | } |
| 150 | |
| 151 | /* \f */ |
| 152 | |
| 153 | /* probably should integrate the non-PE_LEN_SMAX case with the algorithm in |
| 154 | num2prim() for a single, unified routine */ |
| 155 | |
| 156 | static int ps_write_len (ps, pe) |
| 157 | register PS ps; |
| 158 | register PE pe; |
| 159 | { |
| 160 | byte buffer[1 + sizeof (PElementLen)]; |
| 161 | register byte *bp = buffer, |
| 162 | *ep; |
| 163 | register PElementLen len; |
| 164 | |
| 165 | if ((len = pe -> pe_len) == PE_LEN_INDF) |
| 166 | *bp++ = PE_LEN_XTND; |
| 167 | else |
| 168 | if (len <= PE_LEN_SMAX) |
| 169 | *bp++ = len & 0xff; |
| 170 | else { |
| 171 | ep = buffer + sizeof buffer - 1; |
| 172 | for (bp = ep; len != 0 && buffer < bp; len >>= 8) |
| 173 | *bp-- = len & 0xff; |
| 174 | *bp = PE_LEN_XTND | ((ep - bp) & 0xff); |
| 175 | if (ps_write (ps, bp, ep - bp + 1) == NOTOK) |
| 176 | return NOTOK; |
| 177 | |
| 178 | return OK; |
| 179 | } |
| 180 | |
| 181 | if (ps_write (ps, buffer, bp - buffer) == NOTOK) |
| 182 | return NOTOK; |
| 183 | |
| 184 | return OK; |
| 185 | } |