diff options
Diffstat (limited to 'src/open_lib.cpp')
| -rw-r--r-- | src/open_lib.cpp | 145 |
1 files changed, 97 insertions, 48 deletions
diff --git a/src/open_lib.cpp b/src/open_lib.cpp index f4fa313f..b022b263 100644 --- a/src/open_lib.cpp +++ b/src/open_lib.cpp @@ -37,11 +37,7 @@ #include <string.h> #include "proj_internal.h" -#include "proj_internal.h" -static const char *(*pj_finder)(const char *) = nullptr; -static int path_count = 0; -static char **search_path = nullptr; static const char * proj_lib_name = #ifdef PROJ_LIB PROJ_LIB; @@ -56,54 +52,98 @@ nullptr; void pj_set_finder( const char *(*new_finder)(const char *) ) { - pj_finder = new_finder; + auto ctx = pj_get_default_ctx(); + if( ctx ) { + ctx->file_finder_legacy = new_finder; + } } /************************************************************************/ -/* pj_set_searchpath() */ -/* */ -/* Path control for callers that can't practically provide */ -/* pj_set_finder() style callbacks. Call with (0,NULL) as args */ -/* to clear the searchpath set. */ +/* proj_context_set_file_finder() */ /************************************************************************/ -void pj_set_searchpath ( int count, const char **path ) +/** \brief Assign a file finder callback to a context. + * + * This callback will be used whenever PROJ must open one of its resource files + * (proj.db database, grids, etc...) + * + * The callback will be called with the context currently in use at the moment + * where it is used (not necessarily the one provided during this call), and + * with the provided user_data (which may be NULL). + * The user_data must remain valid during the whole lifetime of the context. + * + * A finder set on the default context will be inherited by contexts created + * later. + * + * @param ctx PROJ context, or NULL for the default context. + * @param finder Finder callback. May be NULL + * @param user_data User data provided to the finder callback. May be NULL. + * + * @since PROJ 6.0 + */ +void proj_context_set_file_finder(PJ_CONTEXT *ctx, proj_file_finder finder, + void* user_data) { - int i; + if( !ctx ) + ctx = pj_get_default_ctx(); + if( !ctx ) + return; + ctx->file_finder = finder; + ctx->file_finder_user_data = user_data; +} - if (path_count > 0 && search_path != nullptr) - { - for (i = 0; i < path_count; i++) - { - pj_dalloc(search_path[i]); - } - pj_dalloc(search_path); - path_count = 0; - search_path = nullptr; - } +/************************************************************************/ +/* proj_context_set_search_paths() */ +/************************************************************************/ - if( count > 0 ) - { - search_path = static_cast<char**>(pj_malloc(sizeof *search_path * count)); - for (i = 0; i < count; i++) + +/** \brief Sets search paths. + * + * Those search paths will be used whenever PROJ must open one of its resource files + * (proj.db database, grids, etc...) + * + * If set on the default context, they will be inherited by contexts created + * later. + * + * @param ctx PROJ context, or NULL for the default context. + * @param count_paths Number of paths. 0 if paths == NULL. + * @param paths Paths. May be NULL. + * + * @since PROJ 6.0 + */ +void proj_context_set_search_paths(PJ_CONTEXT *ctx, + int count_paths, + const char* const* paths) +{ + if( !ctx ) + ctx = pj_get_default_ctx(); + if( !ctx ) + return; + try { + std::vector<std::string> vector_of_paths; + for (int i = 0; i < count_paths; i++) { - search_path[i] = static_cast<char*>(pj_malloc(strlen(path[i]) + 1)); - strcpy(search_path[i], path[i]); + vector_of_paths.emplace_back(paths[i]); } + ctx->set_search_paths(vector_of_paths); + } catch( const std::exception& ) + { } - - path_count = count; } -/* just a couple of helper functions that lets other functions - access the otherwise private search path */ -const char * const *proj_get_searchpath(void) { - return (const char * const *)search_path; -} +/************************************************************************/ +/* pj_set_searchpath() */ +/* */ +/* Path control for callers that can't practically provide */ +/* pj_set_finder() style callbacks. Call with (0,NULL) as args */ +/* to clear the searchpath set. */ +/************************************************************************/ -int proj_get_path_count(void) { - return path_count; +void pj_set_searchpath ( int count, const char **path ) +{ + proj_context_set_search_paths( nullptr, count, const_cast<const char* const*>(path) ); } + /************************************************************************/ /* pj_open_lib_ex() */ /************************************************************************/ @@ -112,16 +152,19 @@ static PAFile pj_open_lib_ex(projCtx ctx, const char *name, const char *mode, char* out_full_filename, size_t out_full_filename_size) { char fname[MAX_PATH_FILENAME+1]; - const char *sysname; + const char *sysname = nullptr; PAFile fid; int n = 0; - int i; #ifdef WIN32 static const char dir_chars[] = "/\\"; #else static const char dir_chars[] = "/"; #endif + if( ctx == nullptr ) { + ctx = pj_get_default_ctx(); + } + if( out_full_filename != nullptr && out_full_filename_size > 0 ) out_full_filename[0] = '\0'; @@ -148,8 +191,11 @@ pj_open_lib_ex(projCtx ctx, const char *name, const char *mode, sysname = name; /* or try to use application provided file finder */ - else if( pj_finder != nullptr && pj_finder( name ) != nullptr ) - sysname = pj_finder( name ); + else if( ctx && ctx->file_finder != nullptr && (sysname = ctx->file_finder( ctx, name, ctx->file_finder_user_data )) != nullptr ) + ; + + else if( ctx && ctx->file_finder_legacy != nullptr && (sysname = ctx->file_finder_legacy( name )) != nullptr ) + ; /* or is environment PROJ_LIB defined */ else if ((sysname = getenv("PROJ_LIB")) || (sysname = proj_lib_name)) { @@ -176,16 +222,19 @@ pj_open_lib_ex(projCtx ctx, const char *name, const char *mode, } /* If none of those work and we have a search path, try it */ - if (!fid && path_count > 0) + std::string tmp; + if (!fid && ctx && !ctx->search_paths.empty() ) { - for (i = 0; fid == nullptr && i < path_count; i++) - { - if( strlen(search_path[i]) + 1 + strlen(name) + 1 <= sizeof(fname) ) - { - sprintf(fname, "%s%c%s", search_path[i], DIR_CHAR, name); - sysname = fname; + for( const auto& path: ctx->search_paths ) { + try { + tmp = path + DIR_CHAR + name; + sysname = tmp.c_str(); fid = pj_ctx_fopen(ctx, sysname, mode); + } catch( const std::exception& ) + { } + if( fid ) + break; } if (fid) { |