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#include |
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#include |
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#include |
4
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5
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#define NEED_newRV_noinc |
6
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#define NEED_sv_2pv_flags |
7
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#include "ppport.h" |
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#include "rdb_parser.h" |
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11
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4
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RDB_parser* rdb_parser__init(SV* master, SV* error_class, int utf8) { |
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RDB_parser *parser; |
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Newx(parser, 1, RDB_parser); |
15
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4
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50
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if (parser == NULL) { |
16
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0
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croak("Couldn't allocate memory for parser"); |
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} |
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19
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4
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50
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if (SvROK(master)) { |
20
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0
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parser->master = SvRV(master); |
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} |
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else { |
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4
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parser->master = &PL_sv_undef; |
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} |
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4
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parser->utf8 = utf8; |
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4
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parser->callbacks = newAV(); |
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4
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parser->default_cb = NULL; |
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4
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parser->mblk_reply = NULL; |
30
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4
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parser->mblk_store = NULL; |
31
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4
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parser->buffer = newSVpvn("", 0); |
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4
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parser->state = RDBP_CLEAN; |
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34
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4
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parser->error_class = newSVsv(error_class); |
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parser->error_class_constructor = newSVsv(error_class); |
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4
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sv_catpv(parser->error_class_constructor, "::new"); |
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38
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4
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return parser; |
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} |
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4
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void rdb_parser__free(RDB_parser *parser) { |
42
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struct rdbp_mblk_store *store, *next; |
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4
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SvREFCNT_dec(parser->callbacks); |
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SvREFCNT_dec(parser->buffer); |
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SvREFCNT_dec(parser->error_class); |
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SvREFCNT_dec(parser->error_class_constructor); |
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4
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50
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if (parser->default_cb != NULL) |
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0
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SvREFCNT_dec(parser->default_cb); |
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4
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100
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if (parser->mblk_reply != NULL) |
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1
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SvREFCNT_dec(parser->mblk_reply); |
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53
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store = parser->mblk_store; |
54
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4
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50
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while (store != NULL) { |
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0
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next = store->next; |
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0
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SvREFCNT_dec(store->mblk_reply); |
57
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0
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Safefree(store); |
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0
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store = next; |
59
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} |
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61
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4
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Safefree(parser); |
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4
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} |
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64
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1
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void rdb_parser__propagate_reply(RDB_parser *parser, SV *reply) { |
65
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SV *cb; |
66
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67
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while (1) { |
68
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5
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100
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if(av_len(parser->callbacks) >= 0) { |
69
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3
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cb = av_shift(parser->callbacks); |
70
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3
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sv_2mortal(cb); |
71
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} |
72
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2
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100
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else if (parser->default_cb != NULL) { |
73
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1
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cb = parser->default_cb; |
74
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1
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parser->default_cb = NULL; |
75
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} |
76
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else { |
77
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1
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break; |
78
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} |
79
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80
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{ |
81
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dSP; |
82
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4
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ENTER; |
83
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4
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SAVETMPS; |
84
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4
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50
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PUSHMARK(SP); |
85
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4
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50
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XPUSHs(sv_2mortal(newRV_inc(parser->master))); |
86
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4
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50
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XPUSHs(sv_2mortal(newSVsv(reply))); |
87
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4
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PUTBACK; |
88
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4
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call_sv(cb, G_VOID|G_DISCARD); |
89
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4
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50
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FREETMPS; |
90
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4
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LEAVE; |
91
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} |
92
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4
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} |
93
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1
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} |
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95
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static |
96
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99
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long _line_length(char *start, size_t length) { |
97
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int i; |
98
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99
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char *pos = start; |
99
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100
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340
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100
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for (i=0; i < length - 1; i++, pos++) { |
101
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336
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100
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if (*pos == '\r' && pos[1] == '\n') { |
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50
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102
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95
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return (long)(pos - start); |
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} |
104
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} |
105
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106
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4
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return -1; |
107
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} |
108
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109
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/* |
110
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* read line from the buffer and return it as SV |
111
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*/ |
112
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static |
113
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13
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SV* _read_line(SV *buffer) { |
114
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char *pv; |
115
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long len; |
116
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13
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SV *line = NULL; |
117
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118
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13
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pv = SvPVX(buffer); |
119
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13
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len = _line_length(pv, sv_len(buffer)); |
120
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13
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100
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if (len >= 0) { |
121
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10
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line = newSVpvn(pv, len); |
122
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10
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sv_chop(buffer, pv + len + 2); |
123
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} |
124
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125
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13
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return line; |
126
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}; |
127
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128
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/* |
129
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* read line containing integer number |
130
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*/ |
131
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static |
132
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25
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SV* _read_number(SV *buffer) { |
133
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char *pv; |
134
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long len; |
135
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25
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SV *num = NULL; |
136
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137
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25
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pv = SvPVX(buffer); |
138
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25
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len = _line_length(pv, sv_len(buffer)); |
139
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25
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100
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if (len >= 0) { |
140
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24
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pv[len] = 0; |
141
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24
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num = newSViv(atol(pv)); |
142
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24
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sv_chop(buffer, pv + len + 2); |
143
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} |
144
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145
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25
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return num; |
146
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} |
147
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148
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/* |
149
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* read line containing length |
150
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* returns length >= -1, or -2 if line is not finished |
151
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*/ |
152
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static |
153
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61
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long _read_length(SV *buffer) { |
154
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char *pv; |
155
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long len; |
156
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61
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long num = -2; |
157
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158
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61
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pv = SvPVX(buffer); |
159
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61
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len = _line_length(pv, sv_len(buffer)); |
160
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61
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50
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if (len >= 0) { |
161
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61
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pv[len] = 0; |
162
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61
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num = atol(pv); |
163
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61
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sv_chop(buffer, pv + len + 2); |
164
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} |
165
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166
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61
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return num; |
167
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} |
168
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169
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/* |
170
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* creates RedisDB::Parser::Error object from the message |
171
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*/ |
172
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static |
173
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4
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SV* _create_rdb_error(RDB_parser *parser, SV *msg) { |
174
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int count; |
175
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SV* err; |
176
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177
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4
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dSP; |
178
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4
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ENTER; |
179
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4
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SAVETMPS; |
180
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4
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50
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PUSHMARK(SP); |
181
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4
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50
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XPUSHs(parser->error_class); |
182
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4
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50
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XPUSHs(sv_2mortal(msg)); |
183
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4
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PUTBACK; |
184
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4
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count = call_sv(parser->error_class_constructor, G_SCALAR); |
185
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4
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50
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if (count != 1) |
186
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0
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croak("Expected single return value from new, but got many"); |
187
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4
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SPAGAIN; |
188
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4
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err = newSVsv(POPs); |
189
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4
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PUTBACK; |
190
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4
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50
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FREETMPS; |
191
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4
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LEAVE; |
192
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193
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4
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return err; |
194
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} |
195
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196
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/* |
197
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* stores current multibulk reply status in mblk_stack |
198
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*/ |
199
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static |
200
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13
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void _mblk_status_store(RDB_parser *parser) { |
201
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|
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struct rdbp_mblk_store *store; |
202
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13
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Newx(store, 1, struct rdbp_mblk_store); |
203
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13
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store->mblk_reply = parser->mblk_reply; |
204
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13
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parser->mblk_reply = NULL; |
205
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13
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store->mblk_len = parser->mblk_len; |
206
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13
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store->next = parser->mblk_store; |
207
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13
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parser->mblk_store = store; |
208
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13
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} |
209
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210
|
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/* |
211
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* fetches status of the multibulk reply from the mblk_stack |
212
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|
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*/ |
213
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|
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static |
214
|
13
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void _mblk_status_fetch(RDB_parser *parser) { |
215
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|
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struct rdbp_mblk_store *store; |
216
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|
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217
|
13
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store = parser->mblk_store; |
218
|
13
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50
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if (store == NULL) |
219
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0
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croak("Already at the upper level of multi-bulk reply"); |
220
|
13
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parser->mblk_len = store->mblk_len; |
221
|
13
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parser->mblk_reply = store->mblk_reply; |
222
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13
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parser->mblk_store = store->next; |
223
|
13
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Safefree(store); |
224
|
13
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} |
225
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|
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226
|
|
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/* |
227
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|
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|
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* process new value of multi-bulk reply |
228
|
|
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|
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*/ |
229
|
|
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|
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static |
230
|
69
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|
int _mblk_item(RDB_parser *parser, SV *value) { |
231
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|
|
|
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|
|
SV *tmp; |
232
|
69
|
|
|
|
|
|
int repeat = 0; |
233
|
|
|
|
|
|
|
|
234
|
69
|
|
|
|
|
|
av_push(parser->mblk_reply, value); |
235
|
69
|
100
|
|
|
|
|
if (parser->mblk_len > 1) { |
236
|
49
|
|
|
|
|
|
parser->mblk_len--; |
237
|
49
|
|
|
|
|
|
parser->state = RDBP_WAIT_BUCKS; |
238
|
49
|
|
|
|
|
|
repeat = 1; |
239
|
|
|
|
|
|
|
} |
240
|
20
|
100
|
|
|
|
|
else if (parser->mblk_level > 1) { |
241
|
10
|
|
|
|
|
|
parser->mblk_level--; |
242
|
10
|
|
|
|
|
|
tmp = newRV_noinc((SV *)(parser->mblk_reply)); |
243
|
10
|
|
|
|
|
|
_mblk_status_fetch(parser); |
244
|
10
|
|
|
|
|
|
repeat = _mblk_item(parser, tmp); |
245
|
|
|
|
|
|
|
} |
246
|
|
|
|
|
|
|
|
247
|
69
|
|
|
|
|
|
return repeat; |
248
|
|
|
|
|
|
|
} |
249
|
|
|
|
|
|
|
|
250
|
|
|
|
|
|
|
/* |
251
|
|
|
|
|
|
|
* check if we finished with this reply, and invoke callback if needed. |
252
|
|
|
|
|
|
|
* returns 1 if reply completed or 0 otherwise |
253
|
|
|
|
|
|
|
*/ |
254
|
|
|
|
|
|
|
static |
255
|
73
|
|
|
|
|
|
int _reply_completed(RDB_parser *parser, SV *value) { |
256
|
|
|
|
|
|
|
SV *reply, *cb; |
257
|
|
|
|
|
|
|
|
258
|
73
|
100
|
|
|
|
|
if (parser->mblk_level) { |
259
|
59
|
100
|
|
|
|
|
if (_mblk_item(parser, value)) |
260
|
49
|
|
|
|
|
|
return 0; |
261
|
10
|
|
|
|
|
|
reply = newRV_noinc((SV *)(parser->mblk_reply)); |
262
|
10
|
|
|
|
|
|
parser->mblk_reply = NULL; |
263
|
|
|
|
|
|
|
} |
264
|
|
|
|
|
|
|
else |
265
|
14
|
|
|
|
|
|
reply = value; |
266
|
|
|
|
|
|
|
|
267
|
24
|
|
|
|
|
|
parser->state = RDBP_CLEAN; |
268
|
|
|
|
|
|
|
|
269
|
|
|
|
|
|
|
{ |
270
|
24
|
|
|
|
|
|
dSP; |
271
|
24
|
|
|
|
|
|
ENTER; |
272
|
24
|
|
|
|
|
|
SAVETMPS; |
273
|
24
|
100
|
|
|
|
|
if (av_len(parser->callbacks) >= 0) { |
274
|
23
|
|
|
|
|
|
cb = av_shift(parser->callbacks); |
275
|
23
|
|
|
|
|
|
sv_2mortal(cb); |
276
|
|
|
|
|
|
|
} |
277
|
1
|
50
|
|
|
|
|
else if (parser->default_cb != NULL) { |
278
|
0
|
|
|
|
|
|
cb = parser->default_cb; |
279
|
|
|
|
|
|
|
} |
280
|
1
|
|
|
|
|
|
else croak("No callbacks in the queue and no default callback set"); |
281
|
23
|
50
|
|
|
|
|
PUSHMARK(SP); |
282
|
23
|
50
|
|
|
|
|
XPUSHs(sv_2mortal(newRV_inc(parser->master))); |
283
|
23
|
50
|
|
|
|
|
XPUSHs(sv_2mortal(reply)); |
284
|
23
|
|
|
|
|
|
PUTBACK; |
285
|
23
|
|
|
|
|
|
call_sv(cb, G_VOID|G_DISCARD); |
286
|
23
|
50
|
|
|
|
|
FREETMPS; |
287
|
23
|
|
|
|
|
|
LEAVE; |
288
|
|
|
|
|
|
|
} |
289
|
|
|
|
|
|
|
|
290
|
23
|
|
|
|
|
|
return 1; |
291
|
|
|
|
|
|
|
} |
292
|
|
|
|
|
|
|
|
293
|
38
|
|
|
|
|
|
int rdb_parser__parse_reply(RDB_parser *parser) { |
294
|
|
|
|
|
|
|
char op; |
295
|
|
|
|
|
|
|
char *pv; |
296
|
|
|
|
|
|
|
SV *line, *err, *bulk, *mblk; |
297
|
|
|
|
|
|
|
long length; |
298
|
|
|
|
|
|
|
|
299
|
38
|
50
|
|
|
|
|
if (sv_len(parser->buffer) == 0) return 0; |
300
|
|
|
|
|
|
|
|
301
|
38
|
100
|
|
|
|
|
if (parser->state == RDBP_CLEAN) { |
302
|
25
|
|
|
|
|
|
parser->mblk_level = 0; |
303
|
|
|
|
|
|
|
|
304
|
|
|
|
|
|
|
/* remove first character from the buffer */ |
305
|
25
|
|
|
|
|
|
pv = SvPVX(parser->buffer); |
306
|
25
|
|
|
|
|
|
op = *pv; |
307
|
25
|
|
|
|
|
|
sv_chop(parser->buffer, pv + 1); |
308
|
|
|
|
|
|
|
|
309
|
25
|
100
|
|
|
|
|
if (op == '+') |
310
|
2
|
|
|
|
|
|
parser->state = RDBP_READ_LINE; |
311
|
23
|
100
|
|
|
|
|
else if (op == '-') |
312
|
3
|
|
|
|
|
|
parser->state = RDBP_READ_ERROR; |
313
|
20
|
100
|
|
|
|
|
else if (op == ':') |
314
|
4
|
|
|
|
|
|
parser->state = RDBP_READ_NUMBER; |
315
|
16
|
100
|
|
|
|
|
else if (op == '$') |
316
|
3
|
|
|
|
|
|
parser->state = RDBP_READ_BULK_LEN; |
317
|
13
|
50
|
|
|
|
|
else if (op == '*') { |
318
|
13
|
|
|
|
|
|
parser->state = RDBP_READ_MBLK_LEN; |
319
|
13
|
|
|
|
|
|
parser->mblk_level = 1; |
320
|
|
|
|
|
|
|
} |
321
|
|
|
|
|
|
|
else { |
322
|
0
|
|
|
|
|
|
croak("Got invalid reply"); |
323
|
|
|
|
|
|
|
} |
324
|
|
|
|
|
|
|
} |
325
|
|
|
|
|
|
|
|
326
|
|
|
|
|
|
|
while (1) { |
327
|
211
|
100
|
|
|
|
|
if (sv_len(parser->buffer) < 2) return 0; |
328
|
|
|
|
|
|
|
|
329
|
204
|
100
|
|
|
|
|
if (parser->state == RDBP_READ_LINE) { |
330
|
8
|
|
|
|
|
|
line = _read_line(parser->buffer); |
331
|
8
|
100
|
|
|
|
|
if (line == NULL) return 0; |
332
|
6
|
100
|
|
|
|
|
if (_reply_completed(parser, line)) return 1; |
333
|
|
|
|
|
|
|
} |
334
|
196
|
100
|
|
|
|
|
else if (parser->state == RDBP_READ_ERROR) { |
335
|
5
|
|
|
|
|
|
line = _read_line(parser->buffer); |
336
|
5
|
100
|
|
|
|
|
if (line == NULL) return 0; |
337
|
4
|
|
|
|
|
|
err = _create_rdb_error(parser, line); |
338
|
4
|
100
|
|
|
|
|
if (_reply_completed(parser, err)) return 1; |
339
|
|
|
|
|
|
|
} |
340
|
191
|
100
|
|
|
|
|
else if (parser->state == RDBP_READ_NUMBER) { |
341
|
25
|
|
|
|
|
|
line = _read_number(parser->buffer); |
342
|
25
|
100
|
|
|
|
|
if (line == NULL) return 0; |
343
|
24
|
100
|
|
|
|
|
if (_reply_completed(parser, line)) return 1; |
344
|
|
|
|
|
|
|
} |
345
|
166
|
100
|
|
|
|
|
else if (parser->state == RDBP_READ_BULK_LEN) { |
346
|
35
|
|
|
|
|
|
length = _read_length(parser->buffer); |
347
|
35
|
100
|
|
|
|
|
if (length >= 0) { |
348
|
33
|
|
|
|
|
|
parser->state = RDBP_READ_BULK; |
349
|
33
|
|
|
|
|
|
parser->bulk_len = length; |
350
|
|
|
|
|
|
|
} |
351
|
2
|
50
|
|
|
|
|
else if (length == -1) { |
352
|
2
|
100
|
|
|
|
|
if (_reply_completed(parser, newSVpvn(NULL, 0))) return 1; |
353
|
|
|
|
|
|
|
} |
354
|
0
|
|
|
|
|
|
else return 0; |
355
|
|
|
|
|
|
|
} |
356
|
131
|
100
|
|
|
|
|
else if (parser->state == RDBP_READ_BULK) { |
357
|
35
|
100
|
|
|
|
|
if (sv_len(parser->buffer) < 2 + parser->bulk_len) return 0; |
358
|
33
|
|
|
|
|
|
pv = SvPVX(parser->buffer); |
359
|
33
|
|
|
|
|
|
bulk = newSVpvn(pv, parser->bulk_len); |
360
|
33
|
|
|
|
|
|
sv_chop(parser->buffer, pv + parser->bulk_len + 2); |
361
|
33
|
100
|
|
|
|
|
if (parser->utf8) { |
362
|
4
|
100
|
|
|
|
|
if (!sv_utf8_decode(bulk)) |
363
|
1
|
|
|
|
|
|
croak("Received invalid UTF-8 string from the server"); |
364
|
|
|
|
|
|
|
} |
365
|
32
|
100
|
|
|
|
|
if (_reply_completed(parser, bulk)) return 1; |
366
|
|
|
|
|
|
|
} |
367
|
96
|
100
|
|
|
|
|
else if (parser->state == RDBP_READ_MBLK_LEN) { |
368
|
26
|
|
|
|
|
|
length = _read_length(parser->buffer); |
369
|
26
|
100
|
|
|
|
|
if (length > 0) { |
370
|
21
|
|
|
|
|
|
parser->mblk_len = length; |
371
|
21
|
|
|
|
|
|
parser->state = RDBP_WAIT_BUCKS; |
372
|
21
|
|
|
|
|
|
parser->mblk_reply = newAV(); |
373
|
|
|
|
|
|
|
} |
374
|
5
|
100
|
|
|
|
|
else if (length == 0 || length == -1) { |
|
|
50
|
|
|
|
|
|
375
|
5
|
100
|
|
|
|
|
mblk = (length == 0) ? newRV_noinc((SV *)newAV()) : newSVpvn(NULL, 0); |
376
|
5
|
|
|
|
|
|
parser->mblk_level--; |
377
|
5
|
100
|
|
|
|
|
if (parser->mblk_level > 0) |
378
|
3
|
|
|
|
|
|
_mblk_status_fetch(parser); |
379
|
5
|
100
|
|
|
|
|
if (_reply_completed(parser, mblk)) return 1; |
380
|
|
|
|
|
|
|
} |
381
|
24
|
|
|
|
|
|
else return 0; |
382
|
|
|
|
|
|
|
} |
383
|
70
|
50
|
|
|
|
|
else if (parser->state == RDBP_WAIT_BUCKS) { |
384
|
|
|
|
|
|
|
/* remove first character from the buffer */ |
385
|
70
|
|
|
|
|
|
pv = SvPVX(parser->buffer); |
386
|
70
|
|
|
|
|
|
op = *pv; |
387
|
70
|
|
|
|
|
|
sv_chop(parser->buffer, pv + 1); |
388
|
|
|
|
|
|
|
|
389
|
70
|
100
|
|
|
|
|
if (op == '$') parser->state = RDBP_READ_BULK_LEN; |
390
|
38
|
100
|
|
|
|
|
else if (op == ':') parser->state = RDBP_READ_NUMBER; |
391
|
18
|
100
|
|
|
|
|
else if (op == '+') parser->state = RDBP_READ_LINE; |
392
|
14
|
100
|
|
|
|
|
else if (op == '-') parser->state = RDBP_READ_ERROR; |
393
|
13
|
50
|
|
|
|
|
else if (op == '*') { |
394
|
13
|
|
|
|
|
|
parser->state = RDBP_READ_MBLK_LEN; |
395
|
13
|
|
|
|
|
|
parser->mblk_level++; |
396
|
13
|
|
|
|
|
|
_mblk_status_store(parser); |
397
|
|
|
|
|
|
|
} |
398
|
0
|
|
|
|
|
|
else croak("Invalid multi-bulk reply. Expected [$:+-*] but got something else"); |
399
|
|
|
|
|
|
|
} |
400
|
173
|
|
|
|
|
|
} |
401
|
|
|
|
|
|
|
|
402
|
|
|
|
|
|
|
return 0; |
403
|
|
|
|
|
|
|
} |
404
|
|
|
|
|
|
|
|