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Annotation of libwww/Library/src/HTNetTxt.c, revision 2.1

2.1     ! frystyk     1: /*                                                                  HTNetTxt.c
        !             2: **     NETWORK TELNET TO INTERNAL CHARACTER TEXT AND VISE VERSA
        !             3: **
        !             4: **     (c) COPYRIGHT CERN 1994.
        !             5: **     Please first read the full copyright statement in the file COPYRIGH.
        !             6: **
        !             7: **     The input is assumed to be in local representation with lines
        !             8: **     delimited by (CR,LF) pairs in the local representation.
        !             9: **     The (CR,LF) sequenc when found is changed to a '\n' character,
        !            10: **     the internal C representation of a new line.
        !            11: **
        !            12: ** HISTORY:
        !            13: **     27 Mar 95  HFN  Spawned off from HTFormat.c
        !            14: */
        !            15: 
        !            16: /* Library Include files */
        !            17: #include "tcp.h"
        !            18: #include "HTUtils.h"
        !            19: #include "HTString.h"
        !            20: #include "HTStream.h"
        !            21: #include "HTNetTxt.h"                                   /* Implemented here */
        !            22: 
        !            23: /* Typedefs and global variable local to this module */
        !            24: struct _HTStream {
        !            25:     CONST HTStreamClass *      isa;
        !            26:     HTStream *                         target;
        !            27:     CONST char *               start;
        !            28:     BOOL                       had_cr;
        !            29: };
        !            30: 
        !            31: #define PUTC(c)                (*me->target->isa->put_character)(me->target, c)
        !            32: #define PUTBLOCK(b, l) (*me->target->isa->put_block)(me->target, b, l)
        !            33: 
        !            34: /* ------------------------------------------------------------------------- */
        !            35: 
        !            36: PRIVATE int NetToText_put_character ARGS2(HTStream *, me, char, c)
        !            37: {
        !            38:     return PUTBLOCK(&c, 1);
        !            39: }
        !            40: 
        !            41: PRIVATE int NetToText_put_string ARGS2(HTStream *, me, CONST char *, s)
        !            42: {    
        !            43:     return PUTBLOCK(s, (int) strlen(s));
        !            44: }
        !            45: 
        !            46: PRIVATE int NetToText_put_block ARGS3(HTStream *, me, CONST char*, s, int, l)
        !            47: {
        !            48:     int status;
        !            49:     if (!me->start)
        !            50:        me->start = s;
        !            51:     else {
        !            52:        l -= (me->start - s);
        !            53:        s = me->start;
        !            54:     }
        !            55:     while (l-- > 0) {
        !            56:        if (me->had_cr && *s == LF) {
        !            57:            if (s > me->start+1) {
        !            58:                if ((status = PUTBLOCK(me->start, s - me->start-1)) != HT_OK)
        !            59:                    return status;
        !            60:            }
        !            61:            me->start = s+1;
        !            62:            if ((status = PUTC('\n')) != HT_OK)
        !            63:                return status;
        !            64:        }
        !            65:        me->had_cr = (*s++ == CR);
        !            66:     }
        !            67:     if (me->start < s && (status = PUTBLOCK(me->start, s-me->start)) != HT_OK)
        !            68:        return status;
        !            69:     me->start = NULL;                        /* Whole buffer is written :-) */
        !            70:     return HT_OK;
        !            71: }
        !            72: 
        !            73: PRIVATE int NetToText_flush ARGS1(HTStream *, me)
        !            74: {
        !            75:     return me->target->isa->flush(me->target);
        !            76: }
        !            77: 
        !            78: PRIVATE int NetToText_free ARGS1(HTStream *, me)
        !            79: {
        !            80:     me->target->isa->_free(me->target);                       /* Close rest of pipe */
        !            81:     free(me);
        !            82:     return HT_OK;
        !            83: }
        !            84: 
        !            85: PRIVATE int NetToText_abort ARGS2(HTStream *, me, HTError, e)
        !            86: {
        !            87:     me->target->isa->abort(me->target,e);             /* Abort rest of pipe */
        !            88:     free(me);
        !            89:     return HT_ERROR;
        !            90: }
        !            91: 
        !            92: PRIVATE HTStreamClass NetToTextClass = {
        !            93:     "NetToText",
        !            94:     NetToText_flush,
        !            95:     NetToText_free,
        !            96:     NetToText_abort,
        !            97:     NetToText_put_character,
        !            98:     NetToText_put_string,
        !            99:     NetToText_put_block
        !           100: };
        !           101: 
        !           102: PUBLIC HTStream * HTNetToText ARGS1(HTStream *, target)
        !           103: {
        !           104:     HTStream* me = (HTStream *) calloc(1, sizeof(*me));
        !           105:     if (me == NULL) outofmem(__FILE__, "NetToText");
        !           106:     me->isa = &NetToTextClass;
        !           107:     
        !           108:     me->had_cr = NO;
        !           109:     me->target = target;
        !           110:     return me;
        !           111: }
        !           112: