diff options
Diffstat (limited to 'base/gsiorom.c')
| -rw-r--r-- | base/gsiorom.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/base/gsiorom.c b/base/gsiorom.c index 6516568a..767a35cf 100644 --- a/base/gsiorom.c +++ b/base/gsiorom.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2001-2019 Artifex Software, Inc. +/* Copyright (C) 2001-2020 Artifex Software, Inc. All Rights Reserved. This software is provided AS-IS with no warranty, either express or @@ -412,3 +412,40 @@ romfs_enumerate_next(gs_memory_t * mem, file_enum *pfen, char *ptr, uint maxlen) romfs_enumerate_close(mem, pfen); return ~(uint)0; } + +int +romfs_file_len(gs_memory_t * mem, const char *fname) +{ + extern const uint32_t *gs_romfs[]; + extern const time_t gs_romfs_buildtime; + const uint32_t *node_scan = gs_romfs[0], *node = NULL; + uint32_t filelen, blocks; + int i; + char *filename; + uint namelen = strlen(fname); + + /* a build time of zero indicates we have the "dummy" romfs + * used when COMPILE_INITS==0 - returning a specific error here + * gives us a quick way to check for that. + */ + if (gs_romfs_buildtime == (time_t)0) { + return_error(gs_error_unregistered); + } + + /* scan the inodes to find the requested file */ + for (i=0; node_scan != 0; i++, node_scan = gs_romfs[i]) { + filelen = get_u32_big_endian(node_scan) & 0x7fffffff; /* ignore compression bit */ + blocks = (filelen+ROMFS_BLOCKSIZE-1)/ ROMFS_BLOCKSIZE; + filename = (char *)(&(node_scan[1+(2*blocks)])); + if ((namelen == strlen(filename)) && + (strncmp(filename, fname, namelen) == 0)) { + node = node_scan; + break; + } + } + /* inode points to the file (or NULL if not found */ + if (node == NULL) + return_error(gs_error_undefinedfilename); + + return (int)filelen; +} |