/[MITgcm]/mitgcm.org/devel/buildweb/pkg/swish-e/src/rank.c
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Contents of /mitgcm.org/devel/buildweb/pkg/swish-e/src/rank.c

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Revision 1.1.1.1 - (show annotations) (download) (vendor branch)
Fri Sep 20 19:47:29 2002 UTC (22 years, 10 months ago) by adcroft
Branch: Import, MAIN
CVS Tags: baseline, HEAD
Changes since 1.1: +0 -0 lines
File MIME type: text/plain 
Importing web-site building process.
1
2 #include "swish.h"
3 #include "db.h"
4 #include "rank.h"
5
6 /* 1000 precomputed 10000 * log(i) */
7 static int swish_log[] = {\
8 0, 0, 6931, 10986, 13863, 16094, 17918, 19459, 20794, 21972,\
9 23026, 23979, 24849, 25649, 26391, 27081, 27726, 28332, 28904, 29444,\
10 29957, 30445, 30910, 31355, 31781, 32189, 32581, 32958, 33322, 33673,\
11 34012, 34340, 34657, 34965, 35264, 35553, 35835, 36109, 36376, 36636,\
12 36889, 37136, 37377, 37612, 37842, 38067, 38286, 38501, 38712, 38918,\
13 39120, 39318, 39512, 39703, 39890, 40073, 40254, 40431, 40604, 40775,\
14 40943, 41109, 41271, 41431, 41589, 41744, 41897, 42047, 42195, 42341,\
15 42485, 42627, 42767, 42905, 43041, 43175, 43307, 43438, 43567, 43694,\
16 43820, 43944, 44067, 44188, 44308, 44427, 44543, 44659, 44773, 44886,\
17 44998, 45109, 45218, 45326, 45433, 45539, 45643, 45747, 45850, 45951,\
18 46052, 46151, 46250, 46347, 46444, 46540, 46634, 46728, 46821, 46913,\
19 47005, 47095, 47185, 47274, 47362, 47449, 47536, 47622, 47707, 47791,\
20 47875, 47958, 48040, 48122, 48203, 48283, 48363, 48442, 48520, 48598,\
21 48675, 48752, 48828, 48903, 48978, 49053, 49127, 49200, 49273, 49345,\
22 49416, 49488, 49558, 49628, 49698, 49767, 49836, 49904, 49972, 50039,\
23 50106, 50173, 50239, 50304, 50370, 50434, 50499, 50562, 50626, 50689,\
24 50752, 50814, 50876, 50938, 50999, 51059, 51120, 51180, 51240, 51299,\
25 51358, 51417, 51475, 51533, 51591, 51648, 51705, 51761, 51818, 51874,\
26 51930, 51985, 52040, 52095, 52149, 52204, 52257, 52311, 52364, 52417,\
27 52470, 52523, 52575, 52627, 52679, 52730, 52781, 52832, 52883, 52933,\
28 52983, 53033, 53083, 53132, 53181, 53230, 53279, 53327, 53375, 53423,\
29 53471, 53519, 53566, 53613, 53660, 53706, 53753, 53799, 53845, 53891,\
30 53936, 53982, 54027, 54072, 54116, 54161, 54205, 54250, 54293, 54337,\
31 54381, 54424, 54467, 54510, 54553, 54596, 54638, 54681, 54723, 54765,\
32 54806, 54848, 54889, 54931, 54972, 55013, 55053, 55094, 55134, 55175,\
33 55215, 55255, 55294, 55334, 55373, 55413, 55452, 55491, 55530, 55568,\
34 55607, 55645, 55683, 55722, 55759, 55797, 55835, 55872, 55910, 55947,\
35 55984, 56021, 56058, 56095, 56131, 56168, 56204, 56240, 56276, 56312,\
36 56348, 56384, 56419, 56454, 56490, 56525, 56560, 56595, 56630, 56664,\
37 56699, 56733, 56768, 56802, 56836, 56870, 56904, 56937, 56971, 57004,\
38 57038, 57071, 57104, 57137, 57170, 57203, 57236, 57268, 57301, 57333,\
39 57366, 57398, 57430, 57462, 57494, 57526, 57557, 57589, 57621, 57652,\
40 57683, 57714, 57746, 57777, 57807, 57838, 57869, 57900, 57930, 57961,\
41 57991, 58021, 58051, 58081, 58111, 58141, 58171, 58201, 58230, 58260,\
42 58289, 58319, 58348, 58377, 58406, 58435, 58464, 58493, 58522, 58551,\
43 58579, 58608, 58636, 58665, 58693, 58721, 58749, 58777, 58805, 58833,\
44 58861, 58889, 58916, 58944, 58972, 58999, 59026, 59054, 59081, 59108,\
45 59135, 59162, 59189, 59216, 59243, 59269, 59296, 59322, 59349, 59375,\
46 59402, 59428, 59454, 59480, 59506, 59532, 59558, 59584, 59610, 59636,\
47 59661, 59687, 59713, 59738, 59764, 59789, 59814, 59839, 59865, 59890,\
48 59915, 59940, 59965, 59989, 60014, 60039, 60064, 60088, 60113, 60137,\
49 60162, 60186, 60210, 60234, 60259, 60283, 60307, 60331, 60355, 60379,\
50 60403, 60426, 60450, 60474, 60497, 60521, 60544, 60568, 60591, 60615,\
51 60638, 60661, 60684, 60707, 60730, 60753, 60776, 60799, 60822, 60845,\
52 60868, 60890, 60913, 60936, 60958, 60981, 61003, 61026, 61048, 61070,\
53 61092, 61115, 61137, 61159, 61181, 61203, 61225, 61247, 61269, 61291,\
54 61312, 61334, 61356, 61377, 61399, 61420, 61442, 61463, 61485, 61506,\
55 61527, 61549, 61570, 61591, 61612, 61633, 61654, 61675, 61696, 61717,\
56 61738, 61759, 61779, 61800, 61821, 61841, 61862, 61883, 61903, 61924,\
57 61944, 61964, 61985, 62005, 62025, 62046, 62066, 62086, 62106, 62126,\
58 62146, 62166, 62186, 62206, 62226, 62246, 62265, 62285, 62305, 62324,\
59 62344, 62364, 62383, 62403, 62422, 62442, 62461, 62480, 62500, 62519,\
60 62538, 62558, 62577, 62596, 62615, 62634, 62653, 62672, 62691, 62710,\
61 62729, 62748, 62766, 62785, 62804, 62823, 62841, 62860, 62879, 62897,\
62 62916, 62934, 62953, 62971, 62989, 63008, 63026, 63044, 63063, 63081,\
63 63099, 63117, 63135, 63154, 63172, 63190, 63208, 63226, 63244, 63261,\
64 63279, 63297, 63315, 63333, 63351, 63368, 63386, 63404, 63421, 63439,\
65 63456, 63474, 63491, 63509, 63526, 63544, 63561, 63578, 63596, 63613,\
66 63630, 63648, 63665, 63682, 63699, 63716, 63733, 63750, 63767, 63784,\
67 63801, 63818, 63835, 63852, 63869, 63886, 63902, 63919, 63936, 63953,\
68 63969, 63986, 64003, 64019, 64036, 64052, 64069, 64085, 64102, 64118,\
69 64135, 64151, 64167, 64184, 64200, 64216, 64232, 64249, 64265, 64281,\
70 64297, 64313, 64329, 64345, 64362, 64378, 64394, 64409, 64425, 64441,\
71 64457, 64473, 64489, 64505, 64520, 64536, 64552, 64568, 64583, 64599,\
72 64615, 64630, 64646, 64661, 64677, 64693, 64708, 64723, 64739, 64754,\
73 64770, 64785, 64800, 64816, 64831, 64846, 64862, 64877, 64892, 64907,\
74 64922, 64938, 64953, 64968, 64983, 64998, 65013, 65028, 65043, 65058,\
75 65073, 65088, 65103, 65117, 65132, 65147, 65162, 65177, 65191, 65206,\
76 65221, 65236, 65250, 65265, 65280, 65294, 65309, 65323, 65338, 65352,\
77 65367, 65381, 65396, 65410, 65425, 65439, 65453, 65468, 65482, 65497,\
78 65511, 65525, 65539, 65554, 65568, 65582, 65596, 65610, 65624, 65639,\
79 65653, 65667, 65681, 65695, 65709, 65723, 65737, 65751, 65765, 65779,\
80 65793, 65806, 65820, 65834, 65848, 65862, 65876, 65889, 65903, 65917,\
81 65930, 65944, 65958, 65971, 65985, 65999, 66012, 66026, 66039, 66053,\
82 66067, 66080, 66093, 66107, 66120, 66134, 66147, 66161, 66174, 66187,\
83 66201, 66214, 66227, 66241, 66254, 66267, 66280, 66294, 66307, 66320,\
84 66333, 66346, 66359, 66373, 66386, 66399, 66412, 66425, 66438, 66451,\
85 66464, 66477, 66490, 66503, 66516, 66529, 66542, 66554, 66567, 66580,\
86 66593, 66606, 66619, 66631, 66644, 66657, 66670, 66682, 66695, 66708,\
87 66720, 66733, 66746, 66758, 66771, 66783, 66796, 66809, 66821, 66834,\
88 66846, 66859, 66871, 66884, 66896, 66908, 66921, 66933, 66946, 66958,\
89 66970, 66983, 66995, 67007, 67020, 67032, 67044, 67056, 67069, 67081,\
90 67093, 67105, 67117, 67130, 67142, 67154, 67166, 67178, 67190, 67202,\
91 67214, 67226, 67238, 67250, 67262, 67274, 67286, 67298, 67310, 67322,\
92 67334, 67346, 67358, 67370, 67382, 67393, 67405, 67417, 67429, 67441,\
93 67452, 67464, 67476, 67488, 67499, 67511, 67523, 67534, 67546, 67558,\
94 67569, 67581, 67593, 67604, 67616, 67627, 67639, 67650, 67662, 67673,\
95 67685, 67696, 67708, 67719, 67731, 67742, 67754, 67765, 67776, 67788,\
96 67799, 67811, 67822, 67833, 67845, 67856, 67867, 67878, 67890, 67901,\
97 67912, 67923, 67935, 67946, 67957, 67968, 67979, 67991, 68002, 68013,\
98 68024, 68035, 68046, 68057, 68068, 68079, 68090, 68101, 68112, 68123,\
99 68134, 68145, 68156, 68167, 68178, 68189, 68200, 68211, 68222, 68233,\
100 68244, 68255, 68265, 68276, 68287, 68298, 68309, 68320, 68330, 68341,\
101 68352, 68363, 68373, 68384, 68395, 68405, 68416, 68427, 68437, 68448,\
102 68459, 68469, 68480, 68491, 68501, 68512, 68522, 68533, 68544, 68554,\
103 68565, 68575, 68586, 68596, 68607, 68617, 68628, 68638, 68648, 68659,\
104 68669, 68680, 68690, 68701, 68711, 68721, 68732, 68742, 68752, 68763,\
105 68773, 68783, 68794, 68804, 68814, 68824, 68835, 68845, 68855, 68865,\
106 68876, 68886, 68896, 68906, 68916, 68926, 68937, 68947, 68957, 68967,\
107 68977, 68987, 68997, 69007, 69017, 69027, 69037, 69048, 69058, 69068,\
108 69078,
109 };
110
111 /* 1000 precomputed 1000 * log10(i) */
112 static int swish_log10[] = {\
113 0, 0, 3010, 4771, 6021, 6990, 7782, 8451, 9031, 9542,\
114 10000, 10414, 10792, 11139, 11461, 11761, 12041, 12304, 12553, 12788,\
115 13010, 13222, 13424, 13617, 13802, 13979, 14150, 14314, 14472, 14624,\
116 14771, 14914, 15051, 15185, 15315, 15441, 15563, 15682, 15798, 15911,\
117 16021, 16128, 16232, 16335, 16435, 16532, 16628, 16721, 16812, 16902,\
118 16990, 17076, 17160, 17243, 17324, 17404, 17482, 17559, 17634, 17709,\
119 17782, 17853, 17924, 17993, 18062, 18129, 18195, 18261, 18325, 18388,\
120 18451, 18513, 18573, 18633, 18692, 18751, 18808, 18865, 18921, 18976,\
121 19031, 19085, 19138, 19191, 19243, 19294, 19345, 19395, 19445, 19494,\
122 19542, 19590, 19638, 19685, 19731, 19777, 19823, 19868, 19912, 19956,\
123 20000, 20043, 20086, 20128, 20170, 20212, 20253, 20294, 20334, 20374,\
124 20414, 20453, 20492, 20531, 20569, 20607, 20645, 20682, 20719, 20755,\
125 20792, 20828, 20864, 20899, 20934, 20969, 21004, 21038, 21072, 21106,\
126 21139, 21173, 21206, 21239, 21271, 21303, 21335, 21367, 21399, 21430,\
127 21461, 21492, 21523, 21553, 21584, 21614, 21644, 21673, 21703, 21732,\
128 21761, 21790, 21818, 21847, 21875, 21903, 21931, 21959, 21987, 22014,\
129 22041, 22068, 22095, 22122, 22148, 22175, 22201, 22227, 22253, 22279,\
130 22304, 22330, 22355, 22380, 22405, 22430, 22455, 22480, 22504, 22529,\
131 22553, 22577, 22601, 22625, 22648, 22672, 22695, 22718, 22742, 22765,\
132 22788, 22810, 22833, 22856, 22878, 22900, 22923, 22945, 22967, 22989,\
133 23010, 23032, 23054, 23075, 23096, 23118, 23139, 23160, 23181, 23201,\
134 23222, 23243, 23263, 23284, 23304, 23324, 23345, 23365, 23385, 23404,\
135 23424, 23444, 23464, 23483, 23502, 23522, 23541, 23560, 23579, 23598,\
136 23617, 23636, 23655, 23674, 23692, 23711, 23729, 23747, 23766, 23784,\
137 23802, 23820, 23838, 23856, 23874, 23892, 23909, 23927, 23945, 23962,\
138 23979, 23997, 24014, 24031, 24048, 24065, 24082, 24099, 24116, 24133,\
139 24150, 24166, 24183, 24200, 24216, 24232, 24249, 24265, 24281, 24298,\
140 24314, 24330, 24346, 24362, 24378, 24393, 24409, 24425, 24440, 24456,\
141 24472, 24487, 24502, 24518, 24533, 24548, 24564, 24579, 24594, 24609,\
142 24624, 24639, 24654, 24669, 24683, 24698, 24713, 24728, 24742, 24757,\
143 24771, 24786, 24800, 24814, 24829, 24843, 24857, 24871, 24886, 24900,\
144 24914, 24928, 24942, 24955, 24969, 24983, 24997, 25011, 25024, 25038,\
145 25051, 25065, 25079, 25092, 25105, 25119, 25132, 25145, 25159, 25172,\
146 25185, 25198, 25211, 25224, 25237, 25250, 25263, 25276, 25289, 25302,\
147 25315, 25328, 25340, 25353, 25366, 25378, 25391, 25403, 25416, 25428,\
148 25441, 25453, 25465, 25478, 25490, 25502, 25514, 25527, 25539, 25551,\
149 25563, 25575, 25587, 25599, 25611, 25623, 25635, 25647, 25658, 25670,\
150 25682, 25694, 25705, 25717, 25729, 25740, 25752, 25763, 25775, 25786,\
151 25798, 25809, 25821, 25832, 25843, 25855, 25866, 25877, 25888, 25899,\
152 25911, 25922, 25933, 25944, 25955, 25966, 25977, 25988, 25999, 26010,\
153 26021, 26031, 26042, 26053, 26064, 26075, 26085, 26096, 26107, 26117,\
154 26128, 26138, 26149, 26160, 26170, 26180, 26191, 26201, 26212, 26222,\
155 26232, 26243, 26253, 26263, 26274, 26284, 26294, 26304, 26314, 26325,\
156 26335, 26345, 26355, 26365, 26375, 26385, 26395, 26405, 26415, 26425,\
157 26435, 26444, 26454, 26464, 26474, 26484, 26493, 26503, 26513, 26522,\
158 26532, 26542, 26551, 26561, 26571, 26580, 26590, 26599, 26609, 26618,\
159 26628, 26637, 26646, 26656, 26665, 26675, 26684, 26693, 26702, 26712,\
160 26721, 26730, 26739, 26749, 26758, 26767, 26776, 26785, 26794, 26803,\
161 26812, 26821, 26830, 26839, 26848, 26857, 26866, 26875, 26884, 26893,\
162 26902, 26911, 26920, 26928, 26937, 26946, 26955, 26964, 26972, 26981,\
163 26990, 26998, 27007, 27016, 27024, 27033, 27042, 27050, 27059, 27067,\
164 27076, 27084, 27093, 27101, 27110, 27118, 27126, 27135, 27143, 27152,\
165 27160, 27168, 27177, 27185, 27193, 27202, 27210, 27218, 27226, 27235,\
166 27243, 27251, 27259, 27267, 27275, 27284, 27292, 27300, 27308, 27316,\
167 27324, 27332, 27340, 27348, 27356, 27364, 27372, 27380, 27388, 27396,\
168 27404, 27412, 27419, 27427, 27435, 27443, 27451, 27459, 27466, 27474,\
169 27482, 27490, 27497, 27505, 27513, 27520, 27528, 27536, 27543, 27551,\
170 27559, 27566, 27574, 27582, 27589, 27597, 27604, 27612, 27619, 27627,\
171 27634, 27642, 27649, 27657, 27664, 27672, 27679, 27686, 27694, 27701,\
172 27709, 27716, 27723, 27731, 27738, 27745, 27752, 27760, 27767, 27774,\
173 27782, 27789, 27796, 27803, 27810, 27818, 27825, 27832, 27839, 27846,\
174 27853, 27860, 27868, 27875, 27882, 27889, 27896, 27903, 27910, 27917,\
175 27924, 27931, 27938, 27945, 27952, 27959, 27966, 27973, 27980, 27987,\
176 27993, 28000, 28007, 28014, 28021, 28028, 28035, 28041, 28048, 28055,\
177 28062, 28069, 28075, 28082, 28089, 28096, 28102, 28109, 28116, 28122,\
178 28129, 28136, 28142, 28149, 28156, 28162, 28169, 28176, 28182, 28189,\
179 28195, 28202, 28209, 28215, 28222, 28228, 28235, 28241, 28248, 28254,\
180 28261, 28267, 28274, 28280, 28287, 28293, 28299, 28306, 28312, 28319,\
181 28325, 28331, 28338, 28344, 28351, 28357, 28363, 28370, 28376, 28382,\
182 28388, 28395, 28401, 28407, 28414, 28420, 28426, 28432, 28439, 28445,\
183 28451, 28457, 28463, 28470, 28476, 28482, 28488, 28494, 28500, 28506,\
184 28513, 28519, 28525, 28531, 28537, 28543, 28549, 28555, 28561, 28567,\
185 28573, 28579, 28585, 28591, 28597, 28603, 28609, 28615, 28621, 28627,\
186 28633, 28639, 28645, 28651, 28657, 28663, 28669, 28675, 28681, 28686,\
187 28692, 28698, 28704, 28710, 28716, 28722, 28727, 28733, 28739, 28745,\
188 28751, 28756, 28762, 28768, 28774, 28779, 28785, 28791, 28797, 28802,\
189 28808, 28814, 28820, 28825, 28831, 28837, 28842, 28848, 28854, 28859,\
190 28865, 28871, 28876, 28882, 28887, 28893, 28899, 28904, 28910, 28915,\
191 28921, 28927, 28932, 28938, 28943, 28949, 28954, 28960, 28965, 28971,\
192 28976, 28982, 28987, 28993, 28998, 29004, 29009, 29015, 29020, 29025,\
193 29031, 29036, 29042, 29047, 29053, 29058, 29063, 29069, 29074, 29079,\
194 29085, 29090, 29096, 29101, 29106, 29112, 29117, 29122, 29128, 29133,\
195 29138, 29143, 29149, 29154, 29159, 29165, 29170, 29175, 29180, 29186,\
196 29191, 29196, 29201, 29206, 29212, 29217, 29222, 29227, 29232, 29238,\
197 29243, 29248, 29253, 29258, 29263, 29269, 29274, 29279, 29284, 29289,\
198 29294, 29299, 29304, 29309, 29315, 29320, 29325, 29330, 29335, 29340,\
199 29345, 29350, 29355, 29360, 29365, 29370, 29375, 29380, 29385, 29390,\
200 29395, 29400, 29405, 29410, 29415, 29420, 29425, 29430, 29435, 29440,\
201 29445, 29450, 29455, 29460, 29465, 29469, 29474, 29479, 29484, 29489,\
202 29494, 29499, 29504, 29509, 29513, 29518, 29523, 29528, 29533, 29538,\
203 29542, 29547, 29552, 29557, 29562, 29566, 29571, 29576, 29581, 29586,\
204 29590, 29595, 29600, 29605, 29609, 29614, 29619, 29624, 29628, 29633,\
205 29638, 29643, 29647, 29652, 29657, 29661, 29666, 29671, 29675, 29680,\
206 29685, 29689, 29694, 29699, 29703, 29708, 29713, 29717, 29722, 29727,\
207 29731, 29736, 29741, 29745, 29750, 29754, 29759, 29763, 29768, 29773,\
208 29777, 29782, 29786, 29791, 29795, 29800, 29805, 29809, 29814, 29818,\
209 29823, 29827, 29832, 29836, 29841, 29845, 29850, 29854, 29859, 29863,\
210 29868, 29872, 29877, 29881, 29886, 29890, 29894, 29899, 29903, 29908,\
211 29912, 29917, 29921, 29926, 29930, 29934, 29939, 29943, 29948, 29952,\
212 29956, 29961, 29965, 29969, 29974, 29978, 29983, 29987, 29991, 29996,\
213 30000,
214 };
215
216 typedef struct {
217 int mask;
218 int rank;
219 } RankFactor;
220
221 static RankFactor ranks[] = {
222 {IN_TITLE, RANK_TITLE},
223 {IN_HEADER, RANK_HEADER},
224 {IN_META, RANK_META},
225 {IN_COMMENTS, RANK_COMMENTS},
226 {IN_EMPHASIZED, RANK_EMPHASIZED}
227 };
228
229 #define numRanks (sizeof(ranks)/sizeof(ranks[0]))
230
231
232 /* 2001-11 jmruiz With thousands results (>1000000) this routine is a bottleneck.
233 ** (it is called thousands of times) Trying to avoid
234 ** this I have added some optimizations.
235 ** To avoid the annoying conversion in "return (int)rank"
236 ** from double to int that degrades performance search
237 ** I have switched to integer computations.
238 **
239 ** To avoid the loss of precission I use rank *10000,
240 ** reduction *10000, factor *10000, etc...
241 */
242 int getrank(SWISH * sw, int freq, int tfreq, int *posdata, IndexFILE *indexf, int filenum )
243 {
244 int factor;
245 int rank;
246 int reduction;
247 int structure;
248 int i;
249
250 factor = 1;
251
252
253 /* add up the multiplier factor based on where the word occurs */
254
255 /* 2002/jmruiz - This must be rewritten */
256 for(structure = 0, i = 0; i < freq; i++)
257 structure |= GET_STRUCTURE(posdata[i]);
258
259 if(GET_STRUCTURE(structure) != IN_FILE)
260 for (i = 0; i < numRanks; i++)
261 if (ranks[i].mask & structure)
262 factor += ranks[i].rank;
263
264 if(freq > 1000) /* rare case - Do not overrun the static arrays (they only have 1000 entries) */
265 rank = (int)(10000 * (floor(log((double)freq) + 0.5)));
266 else
267 rank = swish_log[freq] + 100000; /* 100000 = 10 * 10000 */
268
269 /* if word count is significant, reduce rank by a number between 1.0 and 5.0 */
270 if ( !indexf->header.ignoreTotalWordCountWhenRanking )
271 {
272 int words;
273
274 getTotalWordsPerFile(sw, indexf, filenum-1, &words);
275
276 if (words <= 10)
277 reduction = 10000; /* 10000 * log10(10) = 10000 */
278 else if (words > 1000)
279 {
280 if(words >= 100000) /* log10(10000) is 5 */
281 reduction = 50000; /* As it was in previous version (5 * 10000) */
282 else /* rare case - do not overrun the static arrays (tehy only have 1000 entries) */
283 reduction = (int) (10000 * (floor(log10((double)words) + 0.5)));
284 }
285 else reduction = swish_log10[words];
286 rank = (rank * factor * 100) / reduction;
287 }
288 /* multiply by the weighting factor, and scale to be sure we don't loose
289 precision when converted to an integer. The rank will be normalized later */
290 else
291 {
292 rank = (rank * factor) / 100;
293 }
294
295 //rank = freq * factor;
296 //printf("* Filenum %d freq %d factor %d rank %d\n", filenum, freq, factor, rank );
297
298 return rank;
299 }
300
301 int getrank_old(SWISH * sw, int freq, int tfreq, int *posdata, IndexFILE *indexf, int filenum )
302 {
303 double factor;
304 double rank;
305 double reduction;
306 int structure;
307 int i;
308
309 /* 2002/jmruiz - This must be rewritten */
310 for(structure = 0, i = 0; i < freq; i++)
311 structure |= GET_STRUCTURE(posdata[i]);
312
313 factor = 1.0;
314
315 /* add up the multiplier factor based on where the word occurs */
316 for (i = 0; i < numRanks; i++)
317 if (ranks[i].mask & structure)
318 factor += ranks[i].rank;
319
320 rank = log((double)freq) + 10.0;
321
322 /* if word count is significant, reduce rank by a number between 1.0 and 5.0 */
323 if ( !indexf->header.ignoreTotalWordCountWhenRanking )
324 {
325 int words;
326
327 getTotalWordsPerFile(sw, indexf, filenum-1, &words);
328
329 if (words < 10) words = 10;
330 reduction = log10((double)words);
331 if (reduction > 5.0) reduction = 5.0;
332 rank /= reduction;
333 }
334
335 /* multiply by the weighting factor, and scale to be sure we don't loose
336 precision when converted to an integer. The rank will be normalized later */
337 rank = rank * factor * 100.0 + 0.5;
338
339 return (int)rank;
340 }
341
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