diff options
Diffstat (limited to 'src/H5PL.c')
| -rw-r--r-- | src/H5PL.c | 273 |
1 files changed, 251 insertions, 22 deletions
@@ -25,15 +25,33 @@ #include "H5private.h" /* Generic Functions */ #include "H5Eprivate.h" /* Error handling */ #include "H5MMprivate.h" /* Memory management */ -#include "H5PLprivate.h" /* Plugin */ +#include "H5PLpkg.h" /* Plugin */ #include "H5Zprivate.h" /* Filter pipeline */ /****************/ /* Local Macros */ /****************/ - -#define H5PL_MAX_PATH_NUM 16 +#ifdef H5_HAVE_WIN32_API +#define H5PL_EXPAND_ENV_VAR { \ + long bufCharCount; \ + char *tempbuf; \ + if(NULL == (tempbuf = (char *)H5MM_malloc(H5PL_EXPAND_BUFFER_SIZE))) \ + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for expanded path") \ + if((bufCharCount = ExpandEnvironmentStringsA(dl_path, tempbuf, H5PL_EXPAND_BUFFER_SIZE)) > H5PL_EXPAND_BUFFER_SIZE) { \ + tempbuf = (char *)H5MM_xfree(tempbuf); \ + HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "expanded path is too long") \ + } \ + if(bufCharCount == 0) { \ + tempbuf = (char *)H5MM_xfree(tempbuf); \ + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "failed to expand path") \ + } \ + dl_path = (char *)H5MM_xfree(dl_path); \ + dl_path = tempbuf; \ + } +#else +#define H5PL_EXPAND_ENV_VAR +#endif /* H5_HAVE_WIN32_API */ /****************************/ /* Macros for supporting @@ -390,6 +408,235 @@ done: /*------------------------------------------------------------------------- + * Function: H5PLappend + * + * Purpose: Insert a plugin path at the end of the list. + * + * Return: Non-negative or success. + * + *------------------------------------------------------------------------- + */ +herr_t +H5PLappend(const char* plugin_path) +{ + herr_t ret_value = SUCCEED; /* Return value */ + char *dl_path = NULL; + + FUNC_ENTER_API(FAIL) + if(H5PL_num_paths_g == H5PL_MAX_PATH_NUM) + HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "too many directories in path for table") + if(NULL == plugin_path) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no path provided") + if(NULL == (dl_path = H5MM_strdup(plugin_path))) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path") + + H5PL_EXPAND_ENV_VAR + + H5PL_path_table_g[H5PL_num_paths_g] = dl_path; + H5PL_num_paths_g++; + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5PLappend() */ + + +/*------------------------------------------------------------------------- + * Function: H5PLprepend + * + * Purpose: Insert a plugin path at the beginning of the list. + * + * Return: Non-negative or success. + * + *------------------------------------------------------------------------- + */ +herr_t +H5PLprepend(const char* plugin_path) +{ + herr_t ret_value = SUCCEED; /* Return value */ + char *dl_path = NULL; + unsigned int plindex; + + FUNC_ENTER_API(FAIL) + if(H5PL_num_paths_g == H5PL_MAX_PATH_NUM) + HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "too many directories in path for table") + if(NULL == plugin_path) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no path provided") + if(NULL == (dl_path = H5MM_strdup(plugin_path))) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path") + + H5PL_EXPAND_ENV_VAR + + for (plindex = (unsigned int)H5PL_num_paths_g; plindex > 0; plindex--) + H5PL_path_table_g[plindex] = H5PL_path_table_g[plindex - 1]; + H5PL_path_table_g[0] = dl_path; + H5PL_num_paths_g++; + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5PLprepend() */ + + +/*------------------------------------------------------------------------- + * Function: H5PLreplace + * + * Purpose: Replace the path at the specified index. + * + * Return: Non-negative or success. + * + *------------------------------------------------------------------------- + */ +herr_t +H5PLreplace(const char* plugin_path, unsigned int index) +{ + herr_t ret_value = SUCCEED; /* Return value */ + char *dl_path = NULL; + + FUNC_ENTER_API(FAIL) + if(NULL == plugin_path) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no path provided") + if(NULL == (dl_path = H5MM_strdup(plugin_path))) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path") + + H5PL_EXPAND_ENV_VAR + + if(H5PL_path_table_g[index]) + H5PL_path_table_g[index] = (char *)H5MM_xfree(H5PL_path_table_g[index]); + H5PL_path_table_g[index] = dl_path; + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5PLreplace() */ + + +/*------------------------------------------------------------------------- + * Function: H5PLinsert + * + * Purpose: Insert a plugin path at the specified index, moving other paths after the index. + * + * Return: Non-negative or success. + * + *------------------------------------------------------------------------- + */ +herr_t +H5PLinsert(const char* plugin_path, unsigned int index) +{ + herr_t ret_value = SUCCEED; /* Return value */ + char *dl_path = NULL; + unsigned int plindex; + + FUNC_ENTER_API(FAIL) + if(H5PL_num_paths_g == H5PL_MAX_PATH_NUM) + HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "too many directories in path for table") + if(NULL == plugin_path) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no path provided") + if(NULL == (dl_path = H5MM_strdup(plugin_path))) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path") + + H5PL_EXPAND_ENV_VAR + + for(plindex = (unsigned int)H5PL_num_paths_g; plindex > index; plindex--) + H5PL_path_table_g[plindex] = H5PL_path_table_g[plindex - 1]; + H5PL_path_table_g[index] = dl_path; + H5PL_num_paths_g++; + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5PLinsert() */ + + +/*------------------------------------------------------------------------- + * Function: H5PLremove + * + * Purpose: Remove the plugin path at the specifed index and compacting the list. + * + * Return: Non-negative or success. + * + *------------------------------------------------------------------------- + */ +herr_t +H5PLremove(unsigned int index) +{ + herr_t ret_value = SUCCEED; /* Return value */ + unsigned int plindex; + + FUNC_ENTER_API(FAIL) + if(H5PL_num_paths_g == 0) + HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "no directories in table") + if(NULL == H5PL_path_table_g[index]) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no directory path at index") + H5PL_path_table_g[index] = (char *)H5MM_xfree(H5PL_path_table_g[index]); + for(plindex = index; plindex < (unsigned int)H5PL_num_paths_g; plindex++) + H5PL_path_table_g[plindex] = H5PL_path_table_g[plindex + 1]; + H5PL_num_paths_g--; + H5PL_path_table_g[H5PL_num_paths_g] = NULL; + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5PLremove() */ + + +/*------------------------------------------------------------------------- + * Function: H5PLget + * + * Purpose: Query the plugin path at the specified index. + * + * Return: Success: The length of path. + * + * If `pathname' is non-NULL then write up to `size' bytes into that + * buffer and always return the length of the pathname. + * Otherwise `size' is ignored and the function does not store the pathname, + * just returning the number of characters required to store the pathname. + * If an error occurs then the buffer pointed to by `pathname' (NULL or non-NULL) + * is unchanged and the function returns a negative value. + * If a zero is returned for the name's length, then there is no pathname + * associated with the index. + * + *------------------------------------------------------------------------- + */ +ssize_t +H5PLget(unsigned int index, char *pathname/*out*/, size_t size) +{ + ssize_t ret_value = 0; /* Return value */ + ssize_t len = 0; /* Length of pathname */ + char *dl_path = NULL; + + FUNC_ENTER_API(FAIL) + if(H5PL_num_paths_g == 0) + HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "no directories in table") + if(NULL == (dl_path = H5PL_path_table_g[index])) + HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no directory path at index") + len = HDstrlen(dl_path); + if(pathname) { + HDstrncpy(pathname, dl_path, MIN((size_t)(len + 1), size)); + if((size_t)len >= size) + pathname[size - 1] = '\0'; + } /* end if */ + + /* Set return value */ + ret_value = len; + +done: + FUNC_LEAVE_API(ret_value) +} /* end H5PLget() */ + + +/*------------------------------------------------------------------------- + * Function: H5PLsize + * + * Purpose: Query the size of the current list of plugin paths. + * + * Return: Non-negative or success. + * + *------------------------------------------------------------------------- + */ +unsigned int +H5PLsize(void) +{ + return (unsigned int)H5PL_num_paths_g; +} /* end H5PLsize() */ + + +/*------------------------------------------------------------------------- * Function: H5PL__init_path_table * * Purpose: Initialize the path table. @@ -422,25 +669,7 @@ H5PL__init_path_table(void) if(NULL == dl_path) HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path") -#ifdef H5_HAVE_WIN32_API - else { /* Expand windows env var*/ - long bufCharCount; - char *tempbuf; - if(NULL == (tempbuf = (char *)H5MM_malloc(H5PL_EXPAND_BUFFER_SIZE))) - HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for expanded path") - if((bufCharCount = ExpandEnvironmentStrings(dl_path, tempbuf, H5PL_EXPAND_BUFFER_SIZE)) > H5PL_EXPAND_BUFFER_SIZE) { - tempbuf = (char *)H5MM_xfree(tempbuf); - HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "expanded path is too long") - } - if(bufCharCount == 0) { - tempbuf = (char *)H5MM_xfree(tempbuf); - HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "failed to expand path") - } - dl_path = (char *)H5MM_xfree(dl_path); - dl_path = H5MM_strdup(tempbuf); - tempbuf = (char *)H5MM_xfree(tempbuf); - } -#endif /* H5_HAVE_WIN32_API */ + H5PL_EXPAND_ENV_VAR /* Put paths in the path table. They are separated by ":" */ dir = HDstrtok(dl_path, H5PL_PATH_SEPARATOR); |