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Diffstat (limited to 'man/dbfp_query_location.3')
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diff --git a/man/dbfp_query_location.3 b/man/dbfp_query_location.3 new file mode 100644 index 0000000..b620283 --- /dev/null +++ b/man/dbfp_query_location.3 @@ -0,0 +1,242 @@ +.\" Automatically generated by Pod::Man 4.07 (Pod::Simple 3.32) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +dbfp_query_loation \- get a list of stations matching a string from the DB +timetable API +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <dbfp.h> +\& +\& int dbfp_query_location(struct dbfp *dbfp, char *input, size_t *n, +\& struct dbfp_location **locations); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fBdbfp_query_location\fR queries a list of locations matching the query string +\&\fIinput\fR from the \s-1DB\s0 timetable \s-1API\s0 using the connection metadata stored in +\&\fIdbfp\fR. The number of results is stored in \fIn\fR. The results are stored in +\&\fIlocations\fR. The memory for the \fIlocations\fR is allocated by the function. +The stored array contains exactly \fIn\fR elements, and is not \s-1NULL\s0 terminated. +.PP +\&\fIdbfp\fR, \fIinput\fR, \fIn\fR and \fIlocations\fR must not be \s-1NULL. \s0\fIdbfp\fR must have +been initialized with \fIdbfp_init\fR. The elements in \fIlocations\fR should be +closed with \fIdbfp_location_close\fR. \fIlocations\fR should be freed by the +caller. +.PP +If the query fails, the values of \fIn\fR and \fIlocations\fR are set to 0 and \s-1NULL\s0 +respectively. +.PP +The \fBdbfp_location\fR structure is defined as: +.PP +.Vb 6 +\& struct dbfp_location { +\& char *name; +\& char *id; +\& float lon; +\& float lat; +\& }; +.Ve +.PP +\&\fIname\fR is the name of the station. \fIid\fR is the \s-1DB\s0 id of the station. It +seems to be an integer, but this is not guaranteed. \fIlon\fR and \fIlat\fR are the +coordinates of the station. +.SH "RETURN VALUE" +.IX Header "RETURN VALUE" +\&\fBdbfp_query_location\fR returns zero if successful, or a non-zero error code. +Positive error codes are from \fIerrno.h\fR, negative error codes are specific +to dbfp. +.SH "ERRORS" +.IX Header "ERRORS" +.IP "\s-1EINVAL\s0" 4 +.IX Item "EINVAL" +if \fIdbfp\fR, \fIinput\fR, \fIn\fR or \fIlocations\fR is \s-1NULL\s0 +.IP "\s-1ENOMEM\s0" 4 +.IX Item "ENOMEM" +if there is not enough memory to store the results of the query +.IP "\s-1DBFP_ERROR_CURL\s0" 4 +.IX Item "DBFP_ERROR_CURL" +if an error occured during the preparation or execution of the network request +.IP "\s-1DBFP_ERROR_FORMAT\s0" 4 +.IX Item "DBFP_ERROR_FORMAT" +if an error occurs during the formatting of the \s-1URL\s0 +.IP "\s-1DBFP_ERROR_PARSE\s0" 4 +.IX Item "DBFP_ERROR_PARSE" +if an error occurs during the parsing of the \s-1XML\s0 response +.IP "\s-1DBFP_ERROR_STRUCTURE\s0" 4 +.IX Item "DBFP_ERROR_STRUCTURE" +if the \s-1API\s0 response has not the expected structure +.SH "EXAMPLE" +.IX Header "EXAMPLE" +.Vb 3 +\& #include <dbfp.h> +\& #include <stdio.h> +\& #include <stdlib.h> +\& +\& int main(int argc, char **argv) +\& { +\& int err = 0; +\& struct dbfp dbfp; +\& struct dbfp_location *locations = NULL; +\& size_t n = 0; +\& size_t i; +\& +\& err = dbfp_init(&dbfp, "API key"); +\& if (err) +\& goto cleanup; +\& err = dbfp_query_location(&dbfp, "Freibu", &n, &locations); +\& if (err) +\& goto cleanup; +\& +\& printf("Number of matches: %zu\en", n); +\& for (i = 0; i < n; i++) +\& printf("%s: %s (%.2f, %.2f)", locations[i].id, +\& locations[i].name, locations[i].lon, +\& locations[i].lat); +\& +\& cleanup: +\& for (i = 0; i < n; i++) +\& dbfp_location_close(&locations[i]); +\& free(locations); +\& dbfp_close(&dbfp); +\& +\& return err ? EXIT_FAILURE : EXIT_SUCCESS; +\& } +.Ve +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIdbfp_init\fR\|(3), \fIdbfp_location_close\fR\|(3) |