/[MITgcm]/mitgcm.org/devel/buildweb/pkg/swish-e/src/rank.c
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Revision 1.1.1.1 - (hide 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 adcroft 1.1
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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