diff options
Diffstat (limited to 'jim-package.c')
| -rw-r--r-- | jim-package.c | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/jim-package.c b/jim-package.c new file mode 100644 index 0000000..3b5fca8 --- /dev/null +++ b/jim-package.c @@ -0,0 +1,349 @@ +#include <string.h> + +#include <jim.h> + + +#ifndef JIM_ANSIC + +#ifndef WIN32 +# include <sys/types.h> +# include <dirent.h> +#else +# include <io.h> +/* Posix dirent.h compatiblity layer for WIN32. + * Copyright Kevlin Henney, 1997, 2003. All rights reserved. + * Copyright Salvatore Sanfilippo ,2005. + * + * Permission to use, copy, modify, and distribute this software and its + * documentation for any purpose is hereby granted without fee, provided + * that this copyright and permissions notice appear in all copies and + * derivatives. + * + * This software is supplied "as is" without express or implied warranty. + * This software was modified by Salvatore Sanfilippo for the Jim Interpreter. + */ + +struct dirent { + char *d_name; +}; + +typedef struct DIR { + long handle; /* -1 for failed rewind */ + struct _finddata_t info; + struct dirent result; /* d_name null iff first time */ + char *name; /* null-terminated char string */ +} DIR; + +DIR *opendir(const char *name) +{ + DIR *dir = 0; + + if(name && name[0]) { + size_t base_length = strlen(name); + const char *all = /* search pattern must end with suitable wildcard */ + strchr("/\\", name[base_length - 1]) ? "*" : "/*"; + + if((dir = (DIR *) Jim_Alloc(sizeof *dir)) != 0 && + (dir->name = (char *) Jim_Alloc(base_length + strlen(all) + 1)) != 0) + { + strcat(strcpy(dir->name, name), all); + + if((dir->handle = (long) _findfirst(dir->name, &dir->info)) != -1) + dir->result.d_name = 0; + else { /* rollback */ + Jim_Free(dir->name); + Jim_Free(dir); + dir = 0; + } + } else { /* rollback */ + Jim_Free(dir); + dir = 0; + errno = ENOMEM; + } + } else { + errno = EINVAL; + } + return dir; +} + +int closedir(DIR *dir) +{ + int result = -1; + + if(dir) { + if(dir->handle != -1) + result = _findclose(dir->handle); + Jim_Free(dir->name); + Jim_Free(dir); + } + if(result == -1) /* map all errors to EBADF */ + errno = EBADF; + return result; +} + +struct dirent *readdir(DIR *dir) +{ + struct dirent *result = 0; + + if(dir && dir->handle != -1) { + if(!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1) { + result = &dir->result; + result->d_name = dir->info.name; + } + } else { + errno = EBADF; + } + return result; +} + +#endif /* WIN32 */ + +/* ----------------------------------------------------------------------------- + * Packages handling + * ---------------------------------------------------------------------------*/ + +#define JIM_PKG_ANY_VERSION -1 + +/* Convert a string of the type "1.2" into an integer. + * MAJOR.MINOR is converted as MAJOR*100+MINOR, so "1.2" is converted + * to the integer with value 102 */ +static int JimPackageVersionToInt(Jim_Interp *interp, const char *v, + int *intPtr, int flags) +{ + char *copy; + jim_wide major, minor; + char *majorStr, *minorStr, *p; + + if (v[0] == '\0') { + *intPtr = JIM_PKG_ANY_VERSION; + return JIM_OK; + } + + copy = Jim_StrDup(v); + p = strchr(copy, '.'); + if (p == NULL) goto badfmt; + *p = '\0'; + majorStr = copy; + minorStr = p+1; + + if (Jim_StringToWide(majorStr, &major, 10) != JIM_OK || + Jim_StringToWide(minorStr, &minor, 10) != JIM_OK) + goto badfmt; + *intPtr = (int)(major*100+minor); + Jim_Free(copy); + return JIM_OK; + +badfmt: + Jim_Free(copy); + if (flags & JIM_ERRMSG) { + Jim_SetResult(interp, Jim_NewEmptyStringObj(interp)); + Jim_AppendStrings(interp, Jim_GetResult(interp), + "invalid package version '", v, "'", NULL); + } + return JIM_ERR; +} + +#define JIM_MATCHVER_EXACT (1<<JIM_PRIV_FLAG_SHIFT) +static int JimPackageMatchVersion(int needed, int actual, int flags) +{ + if (needed == JIM_PKG_ANY_VERSION) return 1; + if (flags & JIM_MATCHVER_EXACT) { + return needed == actual; + } else { + return needed/100 == actual/100 && (needed <= actual); + } +} + +int Jim_PackageProvide(Jim_Interp *interp, const char *name, const char *ver, + int flags) +{ + int intVersion; + /* Check if the version format is ok */ + if (JimPackageVersionToInt(interp, ver, &intVersion, JIM_ERRMSG) != JIM_OK) + return JIM_ERR; + /* If the package was already provided returns an error. */ + if (Jim_FindHashEntry(&interp->packages, name) != NULL) { + if (flags & JIM_ERRMSG) { + Jim_SetResult(interp, Jim_NewEmptyStringObj(interp)); + Jim_AppendStrings(interp, Jim_GetResult(interp), + "package '", name, "' was already provided", NULL); + } + return JIM_ERR; + } + Jim_AddHashEntry(&interp->packages, name, (char*) ver); + return JIM_OK; +} + +static char *JimFindBestPackage(Jim_Interp *interp, char **prefixes, + int prefixc, const char *pkgName, int pkgVer, int flags) +{ + int bestVer = -1, i; + int pkgNameLen = strlen(pkgName); + char *bestPackage = NULL; + struct dirent *de; + + for (i = 0; i < prefixc; i++) { + DIR *dir; + char buf[JIM_PATH_LEN]; + int prefixLen; + + if (prefixes[i] == NULL) continue; + strncpy(buf, prefixes[i], JIM_PATH_LEN); + buf[JIM_PATH_LEN-1] = '\0'; + prefixLen = strlen(buf); + if (prefixLen && buf[prefixLen-1] == '/') + buf[prefixLen-1] = '\0'; + + if ((dir = opendir(buf)) == NULL) continue; + while ((de = readdir(dir)) != NULL) { + char *fileName = de->d_name; + int fileNameLen = strlen(fileName); + + if (strncmp(fileName, "jim-", 4) == 0 && + strncmp(fileName+4, pkgName, pkgNameLen) == 0 && + *(fileName+4+pkgNameLen) == '-' && + fileNameLen > 4 && /* note that this is not really useful */ + (strncmp(fileName+fileNameLen-4, ".tcl", 4) == 0 || + strncmp(fileName+fileNameLen-4, ".dll", 4) == 0 || + strncmp(fileName+fileNameLen-3, ".so", 3) == 0)) + { + char ver[6]; /* xx.yy<nulterm> */ + char *p = strrchr(fileName, '.'); + int verLen, fileVer; + + verLen = p - (fileName+4+pkgNameLen+1); + if (verLen < 3 || verLen > 5) continue; + memcpy(ver, fileName+4+pkgNameLen+1, verLen); + ver[verLen] = '\0'; + if (JimPackageVersionToInt(interp, ver, &fileVer, JIM_NONE) + != JIM_OK) continue; + if (JimPackageMatchVersion(pkgVer, fileVer, flags) && + (bestVer == -1 || bestVer < fileVer)) + { + bestVer = fileVer; + Jim_Free(bestPackage); + bestPackage = Jim_Alloc(strlen(buf)+strlen(fileName)+2); + sprintf(bestPackage, "%s/%s", buf, fileName); + } + } + } + closedir(dir); + } + return bestPackage; +} + +#else /* JIM_ANSIC */ + +static char *JimFindBestPackage(Jim_Interp *interp, char **prefixes, + int prefixc, const char *pkgName, int pkgVer, int flags) +{ + JIM_NOTUSED(interp); + JIM_NOTUSED(prefixes); + JIM_NOTUSED(prefixc); + JIM_NOTUSED(pkgName); + JIM_NOTUSED(pkgVer); + JIM_NOTUSED(flags); + return NULL; +} + +#endif /* JIM_ANSIC */ + +/* Search for a suitable package under every dir specified by jim_libpath + * and load it if possible. If a suitable package was loaded with success + * JIM_OK is returned, otherwise JIM_ERR is returned. */ +static int JimLoadPackage(Jim_Interp *interp, const char *name, int ver, + int flags) +{ + Jim_Obj *libPathObjPtr; + char **prefixes, *best; + int prefixc, i, retCode = JIM_OK; + + libPathObjPtr = Jim_GetGlobalVariableStr(interp, "jim_libpath", JIM_NONE); + if (libPathObjPtr == NULL) { + prefixc = 0; + libPathObjPtr = NULL; + } else { + Jim_IncrRefCount(libPathObjPtr); + Jim_ListLength(interp, libPathObjPtr, &prefixc); + } + + prefixes = Jim_Alloc(sizeof(char*)*prefixc); + for (i = 0; i < prefixc; i++) { + Jim_Obj *prefixObjPtr; + if (Jim_ListIndex(interp, libPathObjPtr, i, + &prefixObjPtr, JIM_NONE) != JIM_OK) + { + prefixes[i] = NULL; + continue; + } + prefixes[i] = Jim_StrDup(Jim_GetString(prefixObjPtr, NULL)); + } + /* Scan every directory to find the "best" package. */ + best = JimFindBestPackage(interp, prefixes, prefixc, name, ver, flags); + if (best != NULL) { + char *p = strrchr(best, '.'); + /* Try to load/source it */ + if (p && strcmp(p, ".tcl") == 0) { + retCode = Jim_EvalFile(interp, best); + } else { + retCode = Jim_LoadLibrary(interp, best); + } + } else { + retCode = JIM_ERR; + } + Jim_Free(best); + for (i = 0; i < prefixc; i++) + Jim_Free(prefixes[i]); + Jim_Free(prefixes); + if (libPathObjPtr) + Jim_DecrRefCount(interp, libPathObjPtr); + return retCode; +} + +const char *Jim_PackageRequire(Jim_Interp *interp, const char *name, + const char *ver, int flags) +{ + Jim_HashEntry *he; + int requiredVer; + + /* Start with an empty error string */ + Jim_SetResultString(interp, "", 0); + + if (JimPackageVersionToInt(interp, ver, &requiredVer, JIM_ERRMSG) != JIM_OK) + return NULL; + he = Jim_FindHashEntry(&interp->packages, name); + if (he == NULL) { + /* Try to load the package. */ + if (JimLoadPackage(interp, name, requiredVer, flags) == JIM_OK) { + he = Jim_FindHashEntry(&interp->packages, name); + if (he == NULL) { + return "?"; + } + return he->val; + } + /* No way... return an error. */ + if (flags & JIM_ERRMSG) { + int len; + Jim_GetString(Jim_GetResult(interp), &len); + Jim_AppendStrings(interp, Jim_GetResult(interp), len ? "\n" : "", + "Can't find package '", name, "'", NULL); + } + return NULL; + } else { + int actualVer; + if (JimPackageVersionToInt(interp, he->val, &actualVer, JIM_ERRMSG) + != JIM_OK) + { + return NULL; + } + /* Check if version matches. */ + if (JimPackageMatchVersion(requiredVer, actualVer, flags) == 0) { + Jim_AppendStrings(interp, Jim_GetResult(interp), + "Package '", name, "' already loaded, but with version ", + he->val, NULL); + return NULL; + } + return he->val; + } +} + |