/* Copyright (c) 2008 - Chris Buckley. Permission is granted for use and modification of this file for research, non-commercial purposes. */ #include "common.h" #include "sysfunc.h" #include "trec_eval.h" #include "trec_format.h" #include /* Read all relevance information from text_qrels_file. Relevance for each docno to qid is determined from text_qrels_file, which consists of text tuples of the form qid iter docno rel giving TREC document numbers (docno, a string) and their relevance (rel, an integer between -127 and 127) to query qid (a string). Iter is ignored Fields are separated by whitespace, string fields can contain no whitespace. File may contain no NULL characters. All pairs stored in per query arrays within all_rel_info. Each list of query judgments is sorted lexicographically by docno. */ /* Declarations in trec_eval.h (generic q info) and trec_format.h (qrels specific info) for the output format */ /* typedef struct { * For each relevance judgement * char *docno; * document id * long rel; * document judgement * } TEXT_QRELS; typedef struct { * For each qid in query * long num_text_qrels; * number of judged documents * TEXT_QRELS *text_qrels; * Array of judged TEXT_QRELS. Kept sorted by docno * } TEXT_QRELS_INFO; typedef struct { char *qid; * query id * char *rel_format; * format of rel_info data. Eg, "qrels" * void *q_rel_info; * relevance info for this qid * } REL_INFO; typedef struct { * Overall relevance judgements * long num_q_rels; * Number of REL_INFO queries * long max_num_q_rels; * Num queries space reserved for * REL_INFO *rel_info; * Array of REL_INFO queries * } ALL_REL_INFO; */ /* Temp structure for values in input line */ typedef struct { char *qid; char *docno; char *rel; } LINES; static int parse_qrels_line (char **start_ptr, char **qid_ptr, char **docno_ptr, char **rel_ptr); static int comp_lines_qid_docno (); /* static pools of memory, allocated here and never changed. Declared static so one day I can write a cleanup procedure to free them */ static char *trec_qrels_buf = NULL; static TEXT_QRELS_INFO *text_info_pool = NULL; static TEXT_QRELS *text_qrels_pool = NULL; static REL_INFO *rel_info_pool = NULL; int te_get_qrels (EPI *epi, char *text_qrels_file, ALL_REL_INFO *all_rel_info) { int fd; int size = 0; char *ptr; char *current_qid; long i; LINES *lines; LINES *line_ptr; long num_lines; long num_qid; /* current pointers into static pools above */ REL_INFO *rel_info_ptr; TEXT_QRELS_INFO *text_info_ptr; TEXT_QRELS *text_qrels_ptr; /* Read entire file into memory */ if (-1 == (fd = open (text_qrels_file, 0)) || 0 >= (size = lseek (fd, 0L, 2)) || NULL == (trec_qrels_buf = malloc ((unsigned) size+2)) || -1 == lseek (fd, 0L, 0) || size != read (fd, trec_qrels_buf, size) || -1 == close (fd)) { fprintf (stderr, "trec_eval.get_qrels: Cannot read qrels file '%s'\n", text_qrels_file); return (UNDEF); } /* Append ending newline if not present, Append NULL terminator */ if (trec_qrels_buf[size-1] != '\n') { trec_qrels_buf[size] = '\n'; size++; } trec_qrels_buf[size] = '\0'; /* Count number of lines in file */ num_lines = 0; for (ptr = trec_qrels_buf; *ptr; ptr = index(ptr,'\n')+1) num_lines++; /* Get all lines */ if (NULL == (lines = Malloc (num_lines, LINES))) return (UNDEF); line_ptr = lines; ptr = trec_qrels_buf; while (*ptr) { if (UNDEF == parse_qrels_line (&ptr, &line_ptr->qid, &line_ptr->docno, &line_ptr->rel)) { fprintf (stderr, "trec_eval.get_qrels: Malformed line %ld\n", (long) (line_ptr - lines + 1)); return (UNDEF); } line_ptr++; } num_lines = line_ptr-lines; /* Sort all lines by qid, then docno */ qsort ((char *) lines, (int) num_lines, sizeof (LINES), comp_lines_qid_docno); /* Go through lines and count number of qid */ num_qid = 1; for (i = 1; i < num_lines; i++) { if (strcmp (lines[i-1].qid, lines[i].qid)) /* New query */ num_qid++; } /* Allocate space for queries */ if (NULL == (rel_info_pool = Malloc (num_qid, REL_INFO)) || NULL == (text_info_pool = Malloc (num_qid, TEXT_QRELS_INFO)) || NULL == (text_qrels_pool = Malloc (num_lines, TEXT_QRELS))) return (UNDEF); rel_info_ptr = rel_info_pool; text_info_ptr = text_info_pool; text_qrels_ptr = text_qrels_pool; /* Go through lines and store all info */ current_qid = ""; for (i = 0; i < num_lines; i++) { if (strcmp (current_qid, lines[i].qid)) { /* New query. End old query and start new one */ if (i != 0) { text_info_ptr->num_text_qrels = text_qrels_ptr - text_info_ptr->text_qrels; text_info_ptr++; rel_info_ptr++; } current_qid = lines[i].qid; text_info_ptr->text_qrels = text_qrels_ptr; *rel_info_ptr = (REL_INFO) {current_qid, "qrels", text_info_ptr}; } text_qrels_ptr->docno = lines[i].docno; text_qrels_ptr->rel = atol (lines[i].rel); text_qrels_ptr++; } /* End last qid */ text_info_ptr->num_text_qrels = text_qrels_ptr - text_info_ptr->text_qrels; all_rel_info->num_q_rels = num_qid; all_rel_info->rel_info = rel_info_pool; Free (lines); return (1); } static int comp_lines_qid_docno (LINES *ptr1, LINES *ptr2) { int cmp = strcmp (ptr1->qid, ptr2->qid); if (cmp) return (cmp); return (strcmp (ptr1->docno, ptr2->docno)); } static int parse_qrels_line (char **start_ptr, char **qid_ptr, char **docno_ptr, char **rel_ptr) { char *ptr = *start_ptr; /* Get qid */ while (*ptr != '\n' && isspace (*ptr)) ptr++; *qid_ptr = ptr; while (! isspace (*ptr)) ptr++; if (*ptr == '\n') return (UNDEF); *ptr++ = '\0'; /* Get iter, ignore */ while (*ptr != '\n' && isspace (*ptr)) ptr++; while (! isspace (*ptr)) ptr++; if (*ptr == '\n') return (UNDEF); ptr++; /* Get docno */ while (*ptr != '\n' && isspace (*ptr)) ptr++; *docno_ptr = ptr; while (! isspace (*ptr)) ptr++; if (*ptr == '\n') return (UNDEF); *ptr++ = '\0'; /* Get relevance */ while (*ptr != '\n' && isspace (*ptr)) ptr++; if (*ptr == '\n') return (UNDEF); *rel_ptr = ptr; while (! isspace (*ptr)) ptr++; if (*ptr != '\n') { *ptr++ = '\0'; while (*ptr != '\n' && isspace (*ptr)) ptr++; if (*ptr != '\n') return (UNDEF); } *ptr++ = '\0'; *start_ptr = ptr; return (0); } int te_get_qrels_cleanup () { if (trec_qrels_buf != NULL) { Free (trec_qrels_buf); trec_qrels_buf = NULL; } if (text_info_pool != NULL) { Free (text_info_pool); text_info_pool = NULL; } if (text_qrels_pool != NULL) { Free (text_qrels_pool); text_qrels_pool = NULL; } if (rel_info_pool != NULL) { Free (rel_info_pool); rel_info_pool = NULL; } return (1); }