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r37/lisp/csl/cslbase/preserve.c
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/* preserve.c Copyright (c) Codemist Ltd, 1990-2002 */ /* * This code may be used and modified, and redistributed in binary * or source form, subject to the "CCL Public License", which should * accompany it. This license is a variant on the BSD license, and thus * permits use of code derived from this in either open and commercial * projects: but it does require that updates to this code be made * available back to the originators of the package. * Before merging other code in with this or linking this code * with other packages or libraries please check that the license terms * of the other material are compatible with those of this. */ /* Signature: 1936b719 10-Oct-2002 */ #include <stdarg.h> #include <string.h> #include <ctype.h> #include "machine.h" #include "version.h" #include "tags.h" #include "cslerror.h" #include "externs.h" #include "arith.h" #include "read.h" #include "stream.h" #ifdef TIMEOUT #include "timeout.h" #endif /* * I perform file compression when making checkpoint images. * This is achieved by having procedure Cfwrite and Cfread which * are much like fwrite and fread but which are entitled to use a * squashed format on the external medium. It is fairly important that * Cfread should be reasonably fast - Cfwrite is just used by (preserve) * and is not so critical. The overall compression strategy implemented * here is a variant on LZ - the compressed file is made up of 12-bit * characters. The first 256 codes stand for bytes present in the original * data, while the remaining codes get allocated to stand for pairs of * characters found adjacent in the data. Initial experiments show that * the simple version of the idea implemented here squashes binary image * files to about 60% of their original size, while more elaborate * schemes can not do MUCH better. */ int32 compression_worth_while = 128; #ifndef DEMO_MODE static void Cfwrite(char *a, int32 size) { /* * I keep a table showing how single 12-bit characters in the * compressed file map onto character-pairs in the original. The * field "where" in this table is notionally a quite separate * array, used to give hashed access to compressed codes. The table is * only needed at startup time and when I am dumping a checkpoint file - * in each case nothing else is one the stack, so since the table is * only 16/32 Kbytes or so I allocate it on the stack: this code is only * used when the stack is otherwise almost empty. Well actually * with the introduction of the (checkpoint) function that can be * used to dump images whatever else is going on the stack may not * be so empty after all. I will nevertheless continue to allocate * my buffers on it. */ unsigned char pair_c[CODESIZE]; /* 4 Kbytes */ unsigned short int pair_prev[CODESIZE], pair_where[CODESIZE]; /* 16 Kbytes */ unsigned char *p = (unsigned char *)a; int32 n = size, i; unsigned32 prev1; int hash, step, half; unsigned int next_code, prev, c; if (size < compression_worth_while) { if (size != 0) Iwrite(a, size); return; } /* * Clear the hash table and indicate that the next code to allocate is 256 */ memset(pair_where, 0, sizeof(pair_where)); next_code = 256; /* * I deal with the first two characters by hand since they can not be * subject to compression. After these first two I can apply uniform * processing. */ prev = *p++; c = *p++; /* * The hash function I use is not especially scientific, but a couple of * exclusive-or operations and a shift will be cheap to compute, and I * can eventually expect prev to be fairly evenly distributed, while the * distribution of c depends a lot on what sort of data is in the file. */ hash = prev ^ c ^ (c << 5); prev1 = ((unsigned32)hash << 20) | ((unsigned32)prev << 8) | c; Iputc(prev >> 4); half = prev & 0xf; prev = c; for (i=2; i<n; i++) { c = *p++; hash = (prev ^ c ^ (c << 5)) & 0xfff; step = (prev - (c << 4)) | 1; /* * I compute a hash value, and also a secondary hash to be used when * making repeated probes. Since the table has size that is a power of * two I will be OK provided by step is an odd number. When I am finished * the table will have 4096-256 entries in it, i.e. it will be 94% full, * so access to it will take about 16 probes to discover that some * item is not present. */ for (;;) { int where = pair_where[hash]; if (where == 0) break; if (pair_prev[where] == prev && pair_c[where] == c) { prev = where; /* squash 2 chars together */ hash = -1; /* set a flag to indicate it was done */ break; } hash = (hash + step) & 0xfff; } if (hash >= 0) { /* * There is a delicacy here - so that the uncompression process can * build its decoding tables on the fly I must delay entering items into * the compression tables by about one character of output. This is * achieved by keeping details of what is to be inserted stored in the * variable "prev1", which is activated here. * When all 4096 codes have been allocated I just flush out the * table and start afresh. A scheme that started with 9-bit chunks and * grew up to use longer ones up to (say) 15 or 16 bits could give * significantly better compression, but at the cost of both more * workspace here and (what is more to the point) seriously extra * overhead picking bit-fields of variable length out of the stream of * bytes in files. */ if (next_code >= CODESIZE) { memset(pair_where, 0, sizeof(pair_where)); next_code = 256; } else { pair_where[prev1 >> 20] = (unsigned short int)next_code; pair_prev[next_code] = (unsigned short int)(prev1 >> 8) & 0xfff; pair_c[next_code] = (unsigned char)prev1; next_code++; } /* * Now the mess of collecting 12 bit items and paching them into sequences * of 8 bit bytes. */ if (half < 0) { Iputc(prev >> 4); half = prev & 0xf; } else { Iputc((half << 4) | ((prev >> 8) & 0xf)); Iputc(prev); half = -1; } /* * record the information that the decoder will in due course see. */ prev1 = ((unsigned32)hash << 20) | ((unsigned32)prev << 8) | c; prev = c; } } /* * Now I have to flush out the final buffered character */ if (half < 0) { Iputc(prev >> 4); Iputc(prev << 4); } else { Iputc((half << 4) | ((prev >> 8) & 0xf)); Iputc(prev); } } #endif /* DEMO_MODE */ /* * These routines pack multiple binary files into one big one. The * good effect is that I expect fseek to be faster than fopen, and as * a result accessing fasl files will be faster. The bad news is that * when I update files I may need to compact them, and doing so will * be very tedious. In this model I do not permit arbitrary interleaving * of read and write operations. */ static void set_dirused(directory_header *h, int v) { h->dirused = (unsigned char)(v & 0xff); h->dirext = (unsigned char)((h->dirext & 0xf0) + ((v>>8) & 0x0f)); } static directory empty_directory = { {'C', MIDDLE_INITIAL, 'L', IMAGE_FORMAT_VERSION, 0, 0, 0, 0, 0}, NULL, "EmptyFile", {"\nEmpty ** *** not dated *** **"} }; /* * In a way that may look clumsy I store file offsets and lengths as * sequences of three or four characters. The object of this * explicit control over memory layout is so that directories produced by * this code have a layout that is not sensitive to the byte-order used * by the computer involved. I also put a few newline characters into * my directory structure so that if one uses an ordinary text editor to * inspect an image file the set of modules and their datestamps should * be easily visible. */ static int32 bits32(char *v) { int32 r = v[3] & 0xff; r = (r << 8) | (v[2] & 0xff); r = (r << 8) | (v[1] & 0xff); return (r << 8) | (v[0] & 0xff); } static int32 bits24(char *v) { int32 r = v[2] & 0xff; r = (r << 8) | (v[1] & 0xff); return (r << 8) | (v[0] & 0xff); } static void setbits32(char *v, int32 r) { *v++ = (char)r; *v++ = (char)(r >> 8); *v++ = (char)(r >> 16); *v = (char)(r >> 24); } static void setbits24(char *v, int32 r) { *v++ = (char)r; *v++ = (char)(r >> 8); *v = (char)(r >> 16); } static directory *current_input_directory; static directory_entry *current_output_entry; static directory *current_output_directory = NULL; static CSLbool any_output_request; static char would_be_output_directory[DIRNAME_LENGTH]; #define I_INACTIVE 0 #define I_READING 1 #define I_WRITING 2 static int Istatus = I_INACTIVE; FILE *binary_read_file; static FILE *binary_write_file; static unsigned32 subfile_checksum; static long int read_bytes_remaining, write_bytes_written; directory *fasl_files[MAX_FASL_PATHS]; static directory *make_empty_directory(char *name) /* * The sole purpose of this empty directory is to carry with it the * name of the file that I had tried to open. */ { directory *d; d = (directory *) malloc(sizeof(directory) - sizeof(directory_entry)); if (d == NULL) return &empty_directory; d->h.C = 'C'; d->h.S = MIDDLE_INITIAL; d->h.L = 'L'; d->h.version = IMAGE_FORMAT_VERSION; d->h.dirsize = 0; d->h.dirused = 0; d->h.dirext = 0; d->h.updated = 0; /* NB read-only */ d->f = NULL; strncpy(d->filename, name, DIRNAME_LENGTH); d->filename[DIRNAME_LENGTH-1] = 0; memset(d->h.eof, 0, 4); return d; } static directory *make_pending_directory(char *name) /* * The sole purpose of this empty directory is to carry with it the * name of the file that I had tried to open. */ { directory *d; int n = sizeof(directory) + (DIRECTORY_SIZE-1)*sizeof(directory_entry); int l = strlen(name) + 1 - DIRNAME_LENGTH - DIRECTORY_SIZE*sizeof(directory_entry); /* * Here I extend the directory header with enough extra bytes to hold the * full name of the file... Once the file has been opened the (potential) * extra data becomes unnecessary. However with room for DIRECTORY_SIZE * entries already it would seem bizarre if the path-name ever actually * overflowed here. */ if (l > 0) n += l; d = (directory *)malloc(n); if (d == NULL) return &empty_directory; d->h.C = 'C'; d->h.S = MIDDLE_INITIAL; d->h.L = 'L'; d->h.version = IMAGE_FORMAT_VERSION; d->h.dirsize = DIRECTORY_SIZE & 0xff; d->h.dirused = 0; d->h.dirext = (DIRECTORY_SIZE >> 4) & 0xf0; d->h.updated = D_PENDING | D_WRITE_OK; /* Well I HOPE that writing will be OK */ d->f = NULL; strcpy(d->filename, name); /* guaranteed enough space here */ memset(d->h.eof, 0, 4); return d; } static void clear_entry(directory_entry *d) { d->D_newline = NEWLINE_CHAR; memset(&d->D_name, ' ', name_size); memcpy(&d->D_name, "<Unused>", 8); memset(&d->D_date, ' ', date_size); (&d->D_date)[0] = '-'; memset(&d->D_position, 0, 4); memset(&d->D_size, 0, 3); } static CSLbool version_moan(int v) { #if defined DEMO_MODE || defined DEMO_BUILD if (v == 'd') return NO; term_printf("\n"); term_printf("+++++ This image file is either corrupted or was not\n"); term_printf("+++++ built for use with the Demonstration version.\n"); term_printf("+++++ Unable to proceed - sorry.\n"); #else if (v == IMAGE_FORMAT_VERSION || v == IMAGE_FORMAT_VERSION-1) return NO; term_printf("\n"); if (v == 'd') { term_printf("+++++ This image file was built for use with the Demonstration\n"); term_printf("+++++ version of this software and can not be used with the\n"); term_printf("+++++ full product.\n"); } else { term_printf("+++++ This image file seems to be from an old or incompatible\n"); term_printf("+++++ version of the software. Please check it by re-installing\n"); term_printf("+++++ or re-building.\n"); } #endif return YES; } directory *open_pds(char *name, CSLbool forinput) /* * Given a file-name, open the associated file, make space for * a directory and return same. */ { char expanded[LONGEST_LEGAL_FILENAME]; directory hdr, *d; CSLbool write_OK = NO; FILE *f; int l, i, n; l = strlen(name); f = NULL; /* * If you are using "-z" for a cold start you may sometimes want to * delete the image file (by hand) before running CSL */ if (!forinput) { #ifdef DEMO_MODE f = NULL; #else f = open_file(expanded, name, l, "r+b", NULL); any_output_request = YES; strncpy(would_be_output_directory, expanded, DIRNAME_LENGTH-1); if (f != NULL) write_OK = YES; else { /* * I first try to open in "r+" mode, which leaves data alone if there * is already some in the file. If that fails, I try "w+" which can * create a new file for me. */ f = open_file(expanded, name, l, "w+b", NULL); if (f != NULL) write_OK = YES; } #endif /* DEMO_MODE */ } /* * If I wanted the file for input or if I tried it for output and failed * then I open for input. */ if (f == NULL) f = open_file(expanded, name, l, "rb", NULL); /* * If the file does not exist I will just hand back a directory that shows * no files in it. This seems as easy a thing to do at this stage as I can * think of. Maybe I should warn the user? */ if (f == NULL) return make_empty_directory(expanded); #ifndef SIXTEEN_BIT #define BUFFER_SIZE 0x10000 /* Use 64 Kbyte buffers for extra speed? */ { char *buffer = (char *)malloc(BUFFER_SIZE); if (buffer != NULL) setvbuf(f, buffer, _IOFBF, BUFFER_SIZE); } #endif fseek(f, 0, SEEK_SET); /* Ensure I am at start of the file */ hdr.h.C = hdr.h.S = hdr.h.L = 0; if (fread(&hdr.h, sizeof(directory_header), 1, f) != 1 || hdr.h.C != 'C' || hdr.h.S != MIDDLE_INITIAL || hdr.h.L != 'L' || /* * Image format versions are somewhat delicate things. I will not change * this format often or lightly and the tests I make will then be set up to * cope with updates from the immediately previous version. The testing code * will need review each time I consider such a change. For the current * upgrade I will allow opening of files from version N-1, but I will * specifically lock out reading an initial heap-image from such. The issue * of people who start with an old file and then write a fresh image back into * it will be viewed as too messy to worry about in detail, but I hope that * I have made it so that writing a new base image (via PRESERVE) updates the * version info. */ version_moan(hdr.h.version) || get_dirused(hdr.h) > get_dirsize(hdr.h) || bits32(hdr.h.eof) < sizeof(directory_header)) { /* * Here I did not find a satisfactory header to the directory. If I wanted * to open the file for input I just return an empty directory, otherwise I * need to create a new one. */ if (!write_OK) return make_empty_directory(expanded); fseek(f, 0, SEEK_SET); n = DIRECTORY_SIZE; /* Size for a directory */ d = (directory *) malloc(sizeof(directory)+(n-1)*sizeof(directory_entry)); if (d == NULL) return &empty_directory; d->h.C = 'C'; d->h.S = MIDDLE_INITIAL; d->h.L = 'L'; d->h.version = IMAGE_FORMAT_VERSION; d->h.dirsize = (unsigned char)(n & 0xff); d->h.dirused = 0; d->h.dirext = (unsigned char)((n >> 4) & 0xf0); d->h.updated = D_WRITE_OK | D_UPDATED; for (i=0; i<n; i++) clear_entry(&d->d[i]); if (fwrite(&d->h, sizeof(directory_header), 1, f) != 1) return make_empty_directory(expanded); if (fwrite(&d->d[0], sizeof(directory_entry), (size_t)n, f) != (size_t)n) return make_empty_directory(expanded); d->f = f; strncpy(d->filename, expanded, DIRNAME_LENGTH); d->filename[DIRNAME_LENGTH-1] = 0; if (fwrite(registration_data, REGISTRATION_SIZE, 1, f) != 1) return make_empty_directory(expanded); setbits32(d->h.eof, (int32)ftell(f)); return d; } hdr.h.updated = write_OK ? D_WRITE_OK : 0; n = get_dirsize(hdr.h); d = (directory *) malloc(sizeof(directory)+(n-1)*sizeof(directory_entry)); if (d == NULL) return &empty_directory; memcpy(&d->h, &hdr.h, sizeof(directory_header)); if (fread(&d->d[0], sizeof(directory_entry), (size_t)n, f) != (size_t)n) return make_empty_directory(expanded); /* * Here the directory seemed OK */ d->f = f; strncpy(d->filename, expanded, DIRNAME_LENGTH); d->filename[DIRNAME_LENGTH-1] = 0; /* * For binary files ANSI specify that the values used with fseek and ftell * are simple counts of the number of characters in the file, and hence * it is proper to save ftell() values from one run to the next. */ return d; } directory *open_default_output_pds(char *name) /* * Given a file-name check if the file exists already. If so try to open * it writable, and if that fails fall back to opening it read-only. * if it does NOT exist yet then defer creating it until the first * write operation on it is attempted. */ { char expanded[LONGEST_LEGAL_FILENAME]; directory hdr, *d; CSLbool write_OK = NO; FILE *f; int l, i, n; l = strlen(name); f = NULL; #ifndef DEMO_MODE /* * See if I can read from the file. If so it must exist, so close it and * try again for output. */ f = open_file(expanded, name, l, "r+b", NULL); any_output_request = YES; strncpy(would_be_output_directory, expanded, DIRNAME_LENGTH-1); if (f != NULL) write_OK = YES; else { /* * I first try to open in "r+" mode, which leaves data alone if there * is already some in the file. If that fails, I will hand back a special * variant on an empty directory. */ f = open_file(expanded, name, l, "rb", NULL); if (f == NULL) return make_pending_directory(expanded); } #endif /* DEMO_MODE */ /* * If the file exists but I could not open it for output then I will * use it read-only. */ if (f == NULL) f = open_file(expanded, name, l, "rb", NULL); /* * If the file does not exist I will just hand back a directory that shows * no files in it. This seems as easy a thing to do at this stage as I can * think of. Maybe I should warn the user? */ if (f == NULL) return make_empty_directory(expanded); #ifndef SIXTEEN_BIT #define BUFFER_SIZE 0x10000 /* Use 64 Kbyte buffers for extra speed? */ { char *buffer = (char *)malloc(BUFFER_SIZE); if (buffer != NULL) setvbuf(f, buffer, _IOFBF, BUFFER_SIZE); } #endif fseek(f, 0, SEEK_SET); /* Ensure I am at start of the file */ if (fread(&hdr.h, sizeof(directory_header), 1, f) != 1 || hdr.h.C != 'C' || hdr.h.S != MIDDLE_INITIAL || hdr.h.L != 'L' || version_moan(hdr.h.version) || get_dirused(hdr.h) > get_dirsize(hdr.h) || bits32(hdr.h.eof) < sizeof(directory_header)) { /* * Here I did not find a satisfactory header to the directory. If I wanted * to open the file for input I just return an empty directory, otherwise I * need to create a new one. */ if (!write_OK) return make_empty_directory(expanded); fseek(f, 0, SEEK_SET); n = DIRECTORY_SIZE; /* Size for a directory */ d = (directory *) malloc(sizeof(directory)+(n-1)*sizeof(directory_entry)); if (d == NULL) return &empty_directory; d->h.C = 'C'; d->h.S = MIDDLE_INITIAL; d->h.L = 'L'; d->h.version = IMAGE_FORMAT_VERSION; d->h.dirsize = (unsigned char)(n & 0xff); d->h.dirused = 0; d->h.dirext = (unsigned char)((n >> 4) & 0xf0); d->h.updated = D_WRITE_OK | D_UPDATED; for (i=0; i<n; i++) clear_entry(&d->d[i]); if (fwrite(&d->h, sizeof(directory_header), 1, f) != 1) return make_empty_directory(expanded); if (fwrite(&d->d[0], sizeof(directory_entry), (size_t)n, f) != (size_t)n) return make_empty_directory(expanded); d->f = f; strncpy(d->filename, expanded, DIRNAME_LENGTH); d->filename[DIRNAME_LENGTH-1] = 0; if (fwrite(registration_data, REGISTRATION_SIZE, 1, f) != 1) return make_empty_directory(expanded); setbits32(d->h.eof, (int32)ftell(f)); return d; } hdr.h.updated = write_OK ? D_WRITE_OK : 0; n = get_dirsize(hdr.h); d = (directory *) malloc(sizeof(directory)+(n-1)*sizeof(directory_entry)); if (d == NULL) return &empty_directory; memcpy(&d->h, &hdr.h, sizeof(directory_header)); if (fread(&d->d[0], sizeof(directory_entry), (size_t)n, f) != (size_t)n) return make_empty_directory(expanded); /* * Here the directory seemed OK */ d->f = f; strncpy(d->filename, expanded, DIRNAME_LENGTH); d->filename[DIRNAME_LENGTH-1] = 0; /* * For binary files ANSI specify that the values used with fseek and ftell * are simple counts of the number of characters in the file, and hence * it is proper to save ftell() values from one run to the next. */ return d; } static int unpending(directory *d) { FILE *f = fopen(d->filename, "w+b"); int32 i, n; if (f == NULL) return YES; d->f = f; d->filename[DIRNAME_LENGTH-1] = 0; /* truncate the name now */ n = DIRECTORY_SIZE; /* Size for a directory */ /* (the next bits were done when the pending directory was first created d->h.C = 'C'; d->h.S = MIDDLE_INITIAL; d->h.L = 'L'; d->h.version = IMAGE_FORMAT_VERSION; d->h.dirsize = n & 0xff; d->h.dirused = 0; d->h.dirext = (n >> 4) & 0xf0; */ d->h.updated = D_WRITE_OK | D_UPDATED; for (i=0; i<n; i++) clear_entry(&d->d[i]); if (fwrite(&d->h, sizeof(directory_header), 1, f) != 1) return YES; if (fwrite(&d->d[0], sizeof(directory_entry), (size_t)n, f) != (size_t)n) return YES; if (fwrite(registration_data, REGISTRATION_SIZE, 1, f) != 1) return YES; setbits32(d->h.eof, (int32)ftell(f)); return NO; } void Iinit(void) { int i; Istatus = I_INACTIVE; current_input_directory = NULL; current_output_entry = NULL; current_output_directory = NULL; binary_read_file = binary_write_file = NULL; read_bytes_remaining = write_bytes_written = 0; any_output_request = NO; strcpy(would_be_output_directory, "<unknown>"); for (i=0; i<number_of_fasl_paths; i++) { if (0x40000000+i == output_directory) fasl_files[i] = open_default_output_pds(fasl_paths[i]); else fasl_files[i] = open_pds(fasl_paths[i], i != output_directory); } MD5_Update((unsigned char *)"Copyright 1997 Codemist Ltd", 24); } void Icontext(Ihandle *where) /* * This and the next are used so that reading from binary files can be * nested, as may be needed while loading fasl files. An Ihandle should * be viewed as an abstract handle on the input stream. Beware however that * if input is from a regular Lisp stream (indicated by read_bytes_remaining * being negative) that standard_input is NOT saved here. Therefore in * some cases it needs to be stacked elsewhere. The reason I do not save * it here is that it is a Lisp_Object and needs garbage collection * protection, which is not easily provided here. */ { switch (where->status = Istatus) { case I_INACTIVE: break; case I_READING: where->f = binary_read_file; if (read_bytes_remaining >= 0) where->o = ftell(binary_read_file); where->n = read_bytes_remaining; where->chk = subfile_checksum; break; case I_WRITING: where->f = binary_write_file; where->o = ftell(binary_write_file); where->n = write_bytes_written; where->chk = subfile_checksum; break; } Istatus = I_INACTIVE; } void Irestore_context(Ihandle x) { switch (Istatus = x.status) { case I_INACTIVE: return; case I_READING: binary_read_file = x.f; read_bytes_remaining = x.n; if (read_bytes_remaining >= 0) fseek(binary_read_file, x.o, SEEK_SET); subfile_checksum = x.chk; return; case I_WRITING: binary_write_file = x.f; fseek(binary_write_file, x.o, SEEK_SET); write_bytes_written = x.n; subfile_checksum = x.chk; return; } } #define IMAGE_CODE (-1000) #define HELP_CODE (-1001) #define BANNER_CODE (-1002) /* * The code here was originally written to support module names up to * 11 characters, but it has now been extended to support long names as * well. * The mechanism used is as follows: * The name field in a directory entry is 12 characters long. For system * special pseudo-modules all 12 characters are used for a name, and the * cases used at present are InitialImage and HelpDataFile. For all * user names the name is padded with blanks, and so user names of up * to 11 characters live in the field with the 12th character a blank. * To support long names I use values 0x80 and up in this 12th position. * (NB position 12 is at offset 11 because of zero-base counting!) * The first segment of a long name uses 11 characters of the user name * and puts 0x80 in the 12th. Subsequent directory entries are used * to hold more characters of the name. These hold 11 characters in the * name field and 24 in the date, and put values 0x81, 0x82 etc in * character 12. They will have a zero length field, but their position * field MUST match that of the first record. This requirement is so that * when I sort a directory the parts of a long name are kept both * together and in the correct order. The last part of a long name has * 0xff in position 12. The result is that I can distinguish the case * of * a regular username of up to 11 chars (blank in position 12) * a system special file (non-bloank, but under 0x80 in posn 12) * the start of a long name (0x80) * a middle part of a long name (0x81 ...) * the final part of a long name (0xff). * when I match names here I will only allow a long-name match if my * directory is pointing at the first part of a long name. * As a further minor usefulness here if I find a match the non-zero value I * return is the number of entries involved. */ static int samename(char *n1, directory *d, int j, int len) /* * Compare the given names, given that n1 is of length len and n2 is * blank-padded to exactly name_size characters. The special cases * with n1 NULL allow len to encode what I am looking for. */ { char *n2 = &d->d[j].D_name; int i, n, recs; if (len == IMAGE_CODE) return (memcmp(n2, "InitialImage", 12) == 0); if (len == HELP_CODE) return (memcmp(n2, "HelpDataFile", 12) == 0); if (len == BANNER_CODE) return (memcmp(n2, "Start-Banner", 12) == 0); if (len < 0) { char hard[16]; sprintf(hard, "HardCode<%.2x>", (-len) & 0xff); return (memcmp(n2, hard, 12) == 0); } if ((n2[11] & 0xff) > 0x80) return 0; n = 0; #define next_char_of_name (n++ < len ? *n1++ : ' ') for (i=0; i<11; i++) if (n2[i] != next_char_of_name) return 0; if ((n2[11] & 0x80) == 0) return ((n >= len) ? 1 : 0); recs = 1; do { n2 = &d->d[++j].D_name; for (i=0; i<11; i++) if (n2[i] != next_char_of_name) return 0; for (i=12; i<36; i++) if (n2[i] != next_char_of_name) return 0; recs++; } while ((n2[11] & 0xff) != 0xff); #undef next_char_of_name if (n < len) return 0; else return recs; } static CSLbool open_input(directory *d, char *name, int len, int32 offset) /* * Set up binary_read_file to access the given module, returning YES * if it was not found in the given directory. I used to pass the * names "InitialImage" and "HelpDataFile" directly to this function, but * to allow for long module names I am changing things so that these special * cases are indicated by passing down a NULL string for the name and giving * an associated length of -1 or -2 (resp). */ { int i; if (Istatus != I_INACTIVE || d == NULL) return YES; subfile_checksum = 0; /* * I use simple linear search to scan the directory - mainly because I * expect directories to be fairly small and once I have found a file * I will take a long while to process it, so any clumsiness here is * not critical. I will not allow myself to read from whichever file * is currently open for output. * Because samename() is careful to ensure it only reports a match when * pointed at the start of a long name it is OK to search in steps of 1 * here. */ for (i=0; i<get_dirused(d->h); i++) { if (samename(name, d, i, len) && &d->d[i] != current_output_entry) { binary_read_file = d->f; read_bytes_remaining = bits24(&d->d[i].D_size); i = fseek(binary_read_file, bits32(&d->d[i].D_position)+offset, SEEK_SET); if (i == 0) /* If fseek succeeded it returned zero */ { Istatus = I_READING; return NO; } else return YES; } } return YES; } void IreInit(void) { MD5_Update((unsigned char *)"Copyright 1997 Codemist Ltd", 24); MD5_Update((unsigned char *)"memory.u", 8); } static int MS_CDECL for_qsort(void const *aa, void const *bb) { directory_entry *a = (directory_entry *)aa, *b = (directory_entry *)bb; long int ap = bits32(&a->D_position), bp = bits32(&b->D_position); if (ap < bp) return -1; else if (ap > bp) return 1; /* * I make the position of the module in the image my primary sort key. * Over-long module names are coped with by giving each part of the * name the same position field, but marking the 12th character of the * name field (D_space) with 0x80, 0x81 ... in extension records. Note that * a regular short module name has a blank character there, while the special * cases of "InitialImage" and "HelpDataFile" each have 'e' there, * "Start-Banner" has 'r', while hard code has '>'. * So bytes 0x80 and up are clearly (if hackily!) distinguished. */ ap = a->D_space & 0xff, bp = b->D_space & 0xff; if (ap < bp) return -1; else if (ap > bp) return 1; else return 0; } static void sort_directory(directory *d) { qsort((void *)d->d, (size_t)get_dirused(d->h), sizeof(directory_entry), for_qsort); } static directory *enlarge_directory(int current_size) { nil_as_base int n = (3*current_size)/2; int newsize = sizeof(directory)+(n-1)*sizeof(directory_entry); int newpos = sizeof(directory_header)+n*sizeof(directory_entry); /* * enlarge_directory() is only called when an output library is known * to exist, so I do not need to check for that here. */ int dirno = library_number(qvalue(output_library)); directory *d1 = fasl_files[dirno]; if (n > current_size+20) n = current_size+20; for (;;) { directory_entry *first; FILE *f; char buffer[512]; /* I hope this is not done too often, since this */ /* is not a very big buffer size for the copy. */ int32 firstpos, firstlen, newfirst, eofpos; sort_directory(d1); first = &d1->d[0]; firstpos = bits32(&first->D_position); if (firstpos >= newpos + REGISTRATION_SIZE) break; /* * Here I need to copy a module up to the end of the file to make room * for the enlarged directory */ firstlen = bits24(&first->D_size); newfirst = eofpos = bits32(d1->h.eof); f = d1->f; firstlen += 4; /* Allow for the checksum */ while (firstlen >= sizeof(buffer)) { fseek(f, firstpos, SEEK_SET); if (fread(buffer, sizeof(buffer), 1, f) != 1) return NULL; fseek(f, eofpos, SEEK_SET); if (fwrite(buffer, sizeof(buffer), 1, f) != 1) return NULL; firstlen -= sizeof(buffer); firstpos += sizeof(buffer); eofpos += sizeof(buffer); } if (firstlen != 0) { fseek(f, firstpos, SEEK_SET); if (fread(buffer, firstlen, 1, f) != 1) return NULL; fseek(f, eofpos, SEEK_SET); if (fwrite(buffer, firstlen, 1, f) != 1) return NULL; eofpos += firstlen; } setbits32(&first->D_position, newfirst); if ((first->D_space & 0xff) == 0x80) { do { first++; setbits32(&first->D_position, newfirst); } while ((first->D_space & 0xff) != 0xff); } setbits32(d1->h.eof, eofpos); } fseek(d1->f, newpos, SEEK_SET); fwrite(registration_data, REGISTRATION_SIZE, 1, d1->f); d1 = (directory *)realloc((void *)d1, newsize); if (d1 == NULL) return NULL; d1->h.dirsize = (unsigned char)(n & 0xff); d1->h.dirext = (unsigned char)((d1->h.dirext & 0x0f) + ((n>>4) & 0xf0)); d1->h.updated |= D_COMPACT | D_UPDATED; while (n>current_size) clear_entry(&d1->d[--n]); fasl_files[dirno] = d1; return d1; } static CSLbool open_output(char *name, int len) /* * Set up binary_write_file to access the given module, returning YES * if anything went wrong. Remember name==NULL for initial image & help * data. */ { #ifdef DEMO_MODE return YES; #else nil_as_base int i, j, n; char *ct; char hard[16]; directory *d; time_t t = time(NULL); Lisp_Object oo = qvalue(output_library); if (!is_library(oo)) return YES; d = fasl_files[library_number(oo)]; if (d == NULL) return YES; /* closed handle, I guess */ if ((d->h.updated & D_WRITE_OK) == 0) return YES; /* * The main effect of the next line will be to prohibit opening a new * FASL file while I am in the middle of reading one that already exists. * Indeed this is a restriction, but at present it seems a very reasonable * on for me to apply. */ if (Istatus != I_INACTIVE) return YES; if (d->h.updated & D_PENDING) { if (unpending(d)) return YES; } subfile_checksum = 0; current_output_directory = d; /* * I use simple linear search to scan the directory - mainly because I * expect directories to be fairly small and once I have found a file * I will take a long while to process it, so any clumsiness here is * not critical. Again note it is OK to scan in steps of 1 despite the * fact that long-names are stored split across consecutive directory slots. */ for (i=0; i<get_dirused(d->h); i++) { if (samename(name, d, i, len)) { current_output_entry = &d->d[i]; d->h.updated |= D_COMPACT | D_UPDATED; if (t == (time_t)(-1)) ct = "not dated"; else ct = ctime(&t); /* * Note that I treat the result handed back by ctime() as delicate, in that * I do not do any library calls between calling ctime and copying the * string it returns to somewhere that is under my own control. */ strncpy(&d->d[i].D_date, ct, date_size); binary_write_file = d->f; write_bytes_written = 0; memcpy(&d->d[i].D_position, d->h.eof, 4); /* For long names I must put the location in each record */ if (d->d[i].D_space & 0x80) { j = 0; do { j++; memcpy(&d->d[i+j].D_position, d->h.eof, 4); } while ((d->d[i+j].D_space & 0xff) != 0xff); } i = fseek(binary_write_file, bits32(d->h.eof), SEEK_SET); if (i == 0) Istatus = I_WRITING; else current_output_directory = NULL; if (name == NULL && len == IMAGE_CODE) d->h.version = IMAGE_FORMAT_VERSION; return i; } } /* * Here the name did not already exist, and so I will need to enter it into * the directory. If I get here the variable i points to the first unused * directory entry. */ if (len == IMAGE_CODE) { name = "InitialImage"; n = 1; d->h.version = IMAGE_FORMAT_VERSION; } else if (len == HELP_CODE) name = "HelpDataFile", len = IMAGE_CODE, n = 1; else if (len == BANNER_CODE) name = "Start-Banner", len = IMAGE_CODE, n = 1; else if (len < 0) { sprintf(hard, "HardCode<%.2x>", (-len) & 0xff); name = hard, len = IMAGE_CODE, n = 1; } else if (len <= 11) n = 1; else if (len <= 11+11+24) n = 2; else if (len <= 11+11+11+24+24) n = 3; else return YES; /* Name longer than 81 chars not supported, sorry */ while (i+n > (int)get_dirsize(d->h)) { d = enlarge_directory(i); current_output_directory = d; if (d == NULL) return YES; } current_output_entry = &d->d[i]; if (len == IMAGE_CODE) { d->d[i].D_newline = NEWLINE_CHAR; memcpy(&d->d[i].D_name, name, 12); memset(&d->d[i].D_date, ' ', date_size); memset(&d->d[i].D_size, 0, 3); memcpy(&d->d[i].D_position, d->h.eof, 4); } else { int np; char *p; /* * First I will clear all the relevant fields to blanks. */ for (j=0; j<n; j++) { d->d[i+j].D_newline = '\n'; memset(&d->d[i+j].D_name, ' ', name_size); memset(&d->d[i+j].D_date, ' ', date_size); memset(&d->d[i+j].D_size, 0, 3); memcpy(&d->d[i+j].D_position, d->h.eof, 4); } #define next_char_of_name (np++ >= len ? ' ' : *p++) np = 0; p = name; for (j=0; j<n; j++) { int k; for (k=0; k<11; k++) (&d->d[i+j].D_name)[k] = next_char_of_name; if (j != 0) for (k=0; k<24; k++) (&d->d[i+j].D_date)[k] = next_char_of_name; if (j == 0 && n == 1) d->d[i+j].D_space = ' '; else if (j == n-1) d->d[i+j].D_space = 0xff; else d->d[i+j].D_space = (char)(0x80+j); #undef next_char_of_name } } if (t == (time_t)(-1)) ct = "** *** not dated *** ** "; else ct = ctime(&t); strncpy(&d->d[i].D_date, ct, date_size); set_dirused(&d->h, get_dirused(d->h)+n); binary_write_file = d->f; write_bytes_written = 0; d->h.updated |= D_UPDATED; i = fseek(binary_write_file, bits32(d->h.eof), SEEK_SET); if (i == 0) { Istatus = I_WRITING; return NO; } else { current_output_directory = NULL; return YES; } #endif /* DEMO_MODE */ } static void list_one_library(Lisp_Object oo, CSLbool out_only) { int j; directory *d = fasl_files[library_number(oo)]; trace_printf("\nFile %s (dirsize %ld length %ld", d->filename, (long)get_dirsize(d->h), (long)bits32(d->h.eof)); j = d->h.updated; if (j != 0) trace_printf(","); if (j & D_WRITE_OK) trace_printf(" Writable"); if (j & D_UPDATED) trace_printf(" Updated"); if (j & D_COMPACT) trace_printf(" NeedsCompaction"); if (j & D_PENDING) trace_printf(" Pending"); if (out_only) trace_printf(" OutputOnly"); trace_printf("):\n"); /* * The format string used here will need adjustment if you ever change the * number of characters used to store names or dates. */ for (j=0; j<get_dirused(d->h); j++) { int n = 0; if (d->d[j].D_space & 0x80) { trace_printf(" %.11s", &d->d[j].D_name); do { n++; trace_printf("%.11s%.24s", &d->d[j+n].D_name, &d->d[j+n].D_date); } while ((d->d[j+n].D_space & 0xff) != 0xff); trace_printf( "\n %-24.24s position %-7ld size: %ld\n", &d->d[j].D_date, (long)bits32(&d->d[j].D_position), (long)bits24(&d->d[j].D_size)); j += n; } else trace_printf( " %-12.12s %-24.24s position %-7ld size: %ld\n", &d->d[j].D_name, &d->d[j].D_date, (long)bits32(&d->d[j].D_position), (long)bits24(&d->d[j].D_size)); } } void Ilist(void) { Lisp_Object nil = C_nil; Lisp_Object il = qvalue(input_libraries), w; Lisp_Object ol = qvalue(output_library); while (consp(il)) { w = qcar(il); il = qcdr(il); if (!is_library(w)) continue; if (w == ol) ol = nil; list_one_library(w, NO); } if (is_library(ol)) list_one_library(ol, YES); } Lisp_Object Llibrary_members(Lisp_Object nil, Lisp_Object oo) { int i, j, k; directory *d = fasl_files[library_number(oo)]; Lisp_Object v, r = C_nil; char *p; for (j=0; j<get_dirused(d->h); j++) { int n = 0; p = (char *)&celt(boffo, 0); k = 0; if (d->d[j].D_space & 0x80) { for (i=0; i<11; i++) { *p++ = (&d->d[j].D_name)[i]; k++; } do { n++; for (i=0; i<11; i++) { *p++ = (&d->d[j+n].D_name)[i]; k++; } } while ((d->d[j+n].D_space & 0xff) != 0xff); j += n; } else { if (memcmp(&d->d[j].D_name, "InitialImage", 12) == 0 || memcmp(&d->d[j].D_name, "HelpDataFile", 12) == 0 || memcmp(&d->d[j].D_name, "Start-Banner", 12) == 0 || memcmp(&d->d[j].D_name, "HardCode<", 9) == 0 && (&d->d[j].D_name)[11] == '>') continue; /* not user modules */ for (i=0; i<12; i++) { *p++ = (&d->d[j].D_name)[i]; k++; } } while (k>0 && p[-1] == ' ') k--, p--; *p = 0; push(r); v = iintern(boffo, k, lisp_package, 0); pop(r); errexit(); r = cons(v, r); errexit(); } return onevalue(r); } Lisp_Object MS_CDECL Llibrary_members0(Lisp_Object nil, int nargs, ...) /* * This returns a list of the modules in the first library on the current * search path. */ { Lisp_Object il = qvalue(input_libraries), w; Lisp_Object ol = qvalue(output_library); argcheck(nargs, 0, "library-members"); while (consp(il)) { w = qcar(il); il = qcdr(il); if (!is_library(w)) continue; return Llibrary_members(nil, w); } if (is_library(ol)) return Llibrary_members(nil, ol); else return onevalue(nil); } CSLbool Imodulep(char *name, int len, char *datestamp, int32 *size, char *expanded_name) /* * Hands back information about whether the given module exists, and * if it does when it was written. Code should be very similar to * that in Iopen. */ { int i; Lisp_Object nil = C_nil; Lisp_Object il = qvalue(input_libraries); /* * nil is conditionally needed for two reasons here: * (a) if NILSEG_EXTERNS was not selected it is needed as a base register for * access to input_libraries * (b) if COMMON was selected it is needed for the expansion of the * consp test. * If neither of the above apply its is redundant, but not a very greate pain. */ CSL_IGNORE(nil); while (consp(il)) { int j; directory *d; Lisp_Object oo = qcar(il); il = qcdr(il); if (!is_library(oo)) continue; i = library_number(oo); d = fasl_files[i]; if (d == NULL) continue; for (j=0; j<get_dirused(d->h); j++) { if (samename(name, d, j, len)) { char *n = fasl_files[i]->filename; memcpy(datestamp, &d->d[j].D_date, date_size); *size = bits24(&d->d[j].D_size); if (name == NULL) sprintf(expanded_name, "%s(InitialImage)", n); else sprintf(expanded_name, "%s(%.*s)", n, len, name); return NO; } } } return YES; } CSLbool IopenRoot(char *expanded_name, int hard) /* * Opens the "InitialImage" file so that it can be loaded. Note that * when I am about to do this I do not have a valid heap image loaded, and * so it would NOT be possible to use the regular search-path mechanism for * libraries. Therefore I will just use images as specified from the * command line (or by default). */ { char *n; int i; if (hard == 0) hard = IMAGE_CODE; for (i=0; i<number_of_fasl_paths; i++) { CSLbool bad; bad = open_input(fasl_files[i], NULL, hard, 0); /* * The name that I return (for possible display in error messages) will be * either that of the file that was opened, or one relating to the last * entry in the search path. */ n = fasl_files[i]->filename; if (expanded_name != NULL) { if (hard == IMAGE_CODE) { if (!bad) { long int pos = ftell(binary_read_file); directory *d = fasl_files[i]; unsigned char rr[REGISTRATION_SIZE]; int n = get_dirsize(d->h) * sizeof(directory_entry); n += sizeof(directory_header); fseek(binary_read_file, n, SEEK_SET); fread(rr, REGISTRATION_SIZE, 1, binary_read_file); if (memcmp(rr, REGISTRATION_VERSION, 4) == 0) memcpy(registration_data, rr, REGISTRATION_SIZE); fseek(binary_read_file, pos, SEEK_SET); } sprintf(expanded_name, "%s(InitialImage)", n); } else if (hard == BANNER_CODE) sprintf(expanded_name, "%s(InitialImage)", n); else sprintf(expanded_name, "%s(HardCode<%.2x>)", n, (-hard) & 0xff); } if (!bad) return NO; } return YES; } CSLbool Iopen(char *name, int len, CSLbool forinput, char *expanded_name) /* * Make file with the given name available through this package of * routines. (name) is a pointer to a string (len characters valid) that * names a fasl file. (forinput) specifies the direction of the transfer * to set up. Returns YES if something failed. * name can be NULL when a module is opened for output, and then output * is sent to "InitialImage". * The same is done for input, but it would be more sensible to use * IopenRoot() to access the root image. */ { char *n; Lisp_Object nil = C_nil; CSL_IGNORE(nil); if (name == NULL) len = IMAGE_CODE; if (forinput) { int i; Lisp_Object il = qvalue(input_libraries); while (consp(il)) { CSLbool bad; Lisp_Object oo = qcar(il); il = qcdr(il); if (!is_library(oo)) continue; i = library_number(oo); bad = open_input(fasl_files[i], name, len, 0); /* * The name that I return (for possible display in error messages) will be * either that of the file that was opened, or one relating to the last * entry in the search path. */ n = fasl_files[i]->filename; if (expanded_name != NULL) sprintf(expanded_name, "%s(%.*s)", n, len, name); if (!bad) return NO; } return YES; } #ifndef DEMO_MODE if (!any_output_request) #endif { if (expanded_name != NULL) strcpy(expanded_name, "<no output file specified>"); return YES; } #ifndef DEMO_MODE n = would_be_output_directory; if (expanded_name != NULL) { if (len == IMAGE_CODE) sprintf(expanded_name, "%s(InitialImage)", n); else sprintf(expanded_name, "%s(%.*s)", n, len, name); } return open_output(name, len); #endif } CSLbool Iwriterootp(char *expanded_name) /* * Test if it will be possible to write out an image file. Used * by (preserve) so it can report that this would fail without actually * doing anything too drastic. */ { #ifdef DEMO_MODE strcpy(expanded_name, "<demo-system>"); return YES; #else Lisp_Object nil = C_nil; directory *d; Lisp_Object oo = qvalue(output_library); CSL_IGNORE(nil); if (!any_output_request) { strcpy(expanded_name, "<no output file specified>"); return YES; } sprintf(expanded_name, "%s(InitialImage)", would_be_output_directory); if (!is_library(oo)) return YES; d = fasl_files[library_number(oo)]; if (d == NULL) return YES; /* closed handle, I guess */ if ((d->h.updated & D_WRITE_OK) == 0) return YES; if (Istatus != I_INACTIVE) return YES; return NO; #endif /* DEMO_MODE */ } CSLbool Iopen_help(int32 offset) /* * Get ready to handle the HELP subfile. offset >= 0 will open an * existing help module for input and position at the given location. * A negative offset indicates that the help module should be opened * for writing. */ { Lisp_Object nil = C_nil; CSL_IGNORE(nil); if (offset >= 0) { Lisp_Object il = qvalue(input_libraries); while (consp(il)) { CSLbool bad; Lisp_Object oo = qcar(il); il = qcdr(il); if (!is_library(oo)) continue; bad = open_input(fasl_files[library_number(oo)], NULL, HELP_CODE, offset); if (!bad) return NO; } return YES; } #ifdef DEMO_MODE return YES; #else if (!any_output_request) return YES; return open_output(NULL, HELP_CODE); #endif } CSLbool Iopen_banner(int code) /* * Get ready to handle the startup banner. * code = 0 open for reading * code = -1 open for writing * code = -2 delete banner file */ { Lisp_Object nil = C_nil; CSL_IGNORE(nil); if (code == -2) return Idelete(NULL, BANNER_CODE); else if (code == 0) { Lisp_Object il = qvalue(input_libraries); while (consp(il)) { CSLbool bad; Lisp_Object oo = qcar(il); il = qcdr(il); if (!is_library(oo)) continue; bad = open_input(fasl_files[library_number(oo)], NULL, BANNER_CODE, 0); if (!bad) return NO; } return YES; } #ifdef DEMO_MODE return YES; #else if (!any_output_request) return YES; return open_output(NULL, BANNER_CODE); #endif } /* * Set up binary_read_file to read from standard input. Return YES if * things fail. */ CSLbool Iopen_from_stdin(void) { if (Istatus != I_INACTIVE) return YES; subfile_checksum = 0; binary_read_file = NULL; read_bytes_remaining = -1; Istatus = I_READING; return NO; } CSLbool Iopen_to_stdout(void) { if (Istatus != I_INACTIVE) return YES; subfile_checksum = 0; Istatus = I_WRITING; return NO; } CSLbool Idelete(char *name, int len) { #ifdef DEMO_MODE return YES; #else nil_as_base int i, nrec; directory *d; Lisp_Object oo = qvalue(output_library); if (!is_library(oo)) return YES; d = fasl_files[library_number(oo)]; if (d == NULL || (d->h.updated && D_WRITE_OK) == 0 || Istatus != I_INACTIVE) return YES; for (i=0; i<get_dirused(d->h); i++) { if ((nrec = samename(name, d, i, len)) != 0) { int j; set_dirused(&d->h, get_dirused(d->h)-nrec); for (j=i; j<get_dirused(d->h); j++) d->d[j] = d->d[j+nrec]; /* * I tidy up the now-unused entry - in some sense this is a redundant * operation, but I think it makes the file seem neater, which may possibly * help avoid confusion and ease debugging. */ while (nrec-- != 0) { memset(&d->d[j].D_name, ' ', name_size); memcpy(&d->d[j].D_name, "<Unused>", 8); memset(&d->d[j].D_date, ' ', date_size); (&d->d[j].D_date)[0] = '-'; setbits32(&d->d[j].D_position, 0); setbits24(&d->d[j].D_size, 0); j++; } d->h.updated |= D_COMPACT | D_UPDATED; return NO; } } return YES; #endif /* DEMO_MODE */ } #define update_crc(chk, c) \ chk_temp = (chk << 7); \ chk = ((chk >> 25) ^ \ (chk_temp >> 1) ^ \ (chk_temp >> 4) ^ \ (0xff & (unsigned32)c)) & 0x7fffffff; static int validate_checksum(FILE *f, unsigned32 chk1) { int c; unsigned32 chk2 = 0; if (read_bytes_remaining < 0) { if ((c = Igetc()) == EOF) goto failed; chk2 = c & 0xff; if ((c = Igetc()) == EOF) goto failed; chk2 = (chk2 << 8) | (c & 0xff); if ((c = Igetc()) == EOF) goto failed; chk2 = (chk2 << 8) | (c & 0xff); if ((c = Igetc()) == EOF) goto failed; chk2 = (chk2 << 8) | (c & 0xff); if (chk1 == chk2) return NO; /* All went well */ } else { if ((c = getc(f)) == EOF) goto failed; chk2 = c & 0xff; if ((c = getc(f)) == EOF) goto failed; chk2 = (chk2 << 8) | (c & 0xff); if ((c = getc(f)) == EOF) goto failed; chk2 = (chk2 << 8) | (c & 0xff); if ((c = getc(f)) == EOF) goto failed; chk2 = (chk2 << 8) | (c & 0xff); if (chk1 == chk2) return NO; /* All went well */ } failed: err_printf("\n+++ FASL module checksum failure (%.8x instead of %.8x)\n", chk2, chk1); return YES; } #ifndef DEMO_MODE static int put_checksum(FILE *f, unsigned32 chk) { Lisp_Object nil = C_nil; /* * NB that while I am writing out the root section of a checkpoint image * I will have unadjusted all Lisp variables, and in particular this will * mean that anything that used to have the value NIL will then be * SPID_NIL instead. Part of what I should remember here is that * in consequence I can not send a main image to a Lisp stream. But I * think that is OK, since the only way I have of setting up fasl_stream * is via the FASLOUT mechanism. */ if (fasl_stream != nil && fasl_stream != SPID_NIL) { putc_stream((int)(chk>>24), fasl_stream); putc_stream((int)(chk>>16), fasl_stream); putc_stream((int)(chk>>8), fasl_stream); putc_stream((int)chk, fasl_stream); return NO; } if (putc((int)(chk>>24), f) == EOF) return YES; if (putc((int)(chk>>16), f) == EOF) return YES; if (putc((int)(chk>>8), f) == EOF) return YES; return (putc((int)chk, f) == EOF); } #endif /* DEMO_MODE */ CSLbool Icopy(char *name, int len) /* * Find the named module in one of the input files, and if the place that * it is found is not already the output file copy it to the output. */ { #ifdef DEMO_MODE return YES; #else int i, ii, j, n; long int k, l, save = read_bytes_remaining; unsigned32 chk1; char hard[16]; directory *d, *id; Lisp_Object nil = C_nil; Lisp_Object il, oo = qvalue(output_library); CSL_IGNORE(nil); if (!is_library(oo)) return YES; d = fasl_files[library_number(oo)]; /* * Only valid if there is an output file and nothing else is going on. */ if (d == NULL || (d->h.updated & D_WRITE_OK) == 0 || Istatus != I_INACTIVE) return YES; if (d->h.updated & D_PENDING) { if (unpending(d)) return YES; } /* * Search for a suitable input module to copy... */ for (il=qvalue(input_libraries); consp(il); il = qcdr(il)) { oo = qcar(il); if (!is_library(oo)) continue; i = library_number(oo); id = fasl_files[i]; for (ii=0; ii<get_dirused(id->h); ii++) if (samename(name, id, ii, len)) goto found; } return YES; /* Module to copy not found */ found: /* * If the potential input module found was in the output directory exit now. */ if (id == d) return NO; /* * Now scan output directory to see where to put result */ for (i=0; i<get_dirused(d->h); i++) if (samename(name, d, i, len)) { d->h.updated |= D_UPDATED | D_COMPACT; goto ofound; } /* * The file was not previously present in the output directory, so * I need to insert it. The code here is copies from open_output and is * now messy enoug that I should really move it to a sub-function. */ if (len == IMAGE_CODE) name = "InitialImage", n = 1; else if (len == HELP_CODE) name = "HelpDataFile", len = IMAGE_CODE, n = 1; else if (len == BANNER_CODE) name = "Start-Banner", len = IMAGE_CODE, n = 1; else if (len < 0) { sprintf(hard, "HardCode<%.2x>", (-len) & 0xff); name = hard, len = IMAGE_CODE, n = 1; } else if (len <= 11) n = 1; else if (len <= 11+11+24) n = 2; else if (len <= 11+11+11+24+24) n = 3; else return YES; /* Name longer than 81 chars not supported, sorry */ while (i+n > (int)get_dirsize(d->h)) { d = enlarge_directory(i); current_output_directory = d; if (d == NULL) return YES; } current_output_entry = &d->d[i]; if (len == IMAGE_CODE) { d->d[i].D_newline = NEWLINE_CHAR; memcpy(&d->d[i].D_name, name, 12); memset(&d->d[i].D_date, ' ', date_size); memset(&d->d[i].D_size, 0, 3); memcpy(&d->d[i].D_position, d->h.eof, 4); } else { int np; char *p; /* * First I will clear all the relevant fields to blanks. */ for (j=0; j<n; j++) { d->d[i+j].D_newline = '\n'; memset(&d->d[i+j].D_name, ' ', name_size); memset(&d->d[i+j].D_date, ' ', date_size); memset(&d->d[i+j].D_size, 0, 3); memcpy(&d->d[i+j].D_position, d->h.eof, 4); } #define next_char_of_name (np++ >= len ? ' ' : *p++) np = 0; p = name; for (j=0; j<n; j++) { for (k=0; k<11; k++) (&d->d[i+j].D_name)[k] = next_char_of_name; if (j != 0) for (k=0; k<24; k++) (&d->d[i+j].D_date)[k] = next_char_of_name; if (j == 0 && n == 1) d->d[i+j].D_space = ' '; else if (j == n-1) d->d[i+j].D_space = 0xff; else d->d[i+j].D_space = (char)(0x80+j); #undef next_char_of_name } } set_dirused(&d->h, get_dirused(d->h)+n); ofound: memcpy(&d->d[i].D_date, &id->d[ii].D_date, date_size); trace_printf("\nCopy %.*s from %s to %s\n", len, name, id->filename, d->filename); memcpy(&d->d[i].D_position, d->h.eof, 4); if (d->d[i].D_space & 0x80) { n = 0; do { n++; memcpy(&d->d[i+n].D_position, d->h.eof, 4); } while ((d->d[i+n].D_space & 0xff) != 0xff); } /* * I provisionally set the size to zero so that if something goes wrong * I will still have a tolerably sensible image file. */ memset(&d->d[i].D_size, 0, 3); d->h.updated |= D_UPDATED; if (fseek(d->f, bits32(&d->d[i].D_position), SEEK_SET) != 0 || fseek(id->f, bits32(&id->d[ii].D_position), SEEK_SET) != 0) return YES; l = bits24(&id->d[ii].D_size); chk1 = 0; for (k=0; k<l; k++) { int c = getc(id->f); unsigned32 chk_temp; /* * I do not have to do anything special about encryption here... */ update_crc(chk1, c); if (c == EOF) return YES; putc(c, d->f); } read_bytes_remaining = 0; j = validate_checksum(id->f, chk1); read_bytes_remaining = save; if (j) return YES; if (put_checksum(d->f, chk1)) return YES; if (fflush(d->f) != 0) return YES; setbits24(&d->d[i].D_size, (int32)l); setbits32(d->h.eof, (int32)ftell(d->f)); return NO; #endif /* DEMO_MODE */ } CSLbool IcloseInput(int check_checksum) /* * Terminate processing one whatever subfile has been being processed. * returns nonzero if there was trouble. * read and verify checksum if arg is TRUE. */ { Istatus = I_INACTIVE; if (check_checksum) return validate_checksum(binary_read_file, subfile_checksum); else return NO; } CSLbool IcloseOutput(void) /* * Terminate processing one whatever subfile has been being processed. * returns nonzero if there was trouble. Write a checksum to the file. * There is a jolly joke here! I MUST NOT try to pick up the identification * of the output directory from the lisp-level variable output_directory * because (preserve) calls this AFTER it has utterly mangled the heap (to * put all pointers into relative form). To alloc for this the variable * current_output_directory identifies the directory within which a file * was most recently opened. */ { #ifdef DEMO_MODE return YES; #else int r; Lisp_Object nil = C_nil; directory *d = current_output_directory; Istatus = I_INACTIVE; if (fasl_stream != nil && fasl_stream != SPID_NIL) { put_checksum(NULL, subfile_checksum); return NO; } current_output_directory = NULL; /* Here I have to write a checksum to the current ouput dir */ if (d == NULL || (d->h.updated & D_WRITE_OK) == 0) return NO; put_checksum(d->f, subfile_checksum); setbits24(¤t_output_entry->D_size, (int32)write_bytes_written); r = fflush(d->f); setbits32(d->h.eof, (int32)ftell(d->f)); /* * I bring the directory at the start of the output file up to date at this * stage - the effect is that if things crash somehow I have a better * chance of resuming from where disaster hit. */ fseek(d->f, 0, SEEK_SET); if (fwrite(&d->h, sizeof(directory_header), 1, d->f) != 1) r = YES; if (fwrite(&d->d[0], sizeof(directory_entry), (size_t)get_dirsize(d->h), d->f) != (size_t)get_dirsize(d->h)) r = YES; if (fflush(d->f) != 0) r = YES; d->h.updated &= ~D_UPDATED; current_output_entry = NULL; return r; #endif /* DEMO_MODE */ } CSLbool finished_with(int j) { #ifdef DEMO_MODE return YES; #else directory *d = fasl_files[j]; fasl_files[j] = NULL; /* * If the library concerned had been opened using (open-library ...) then * the name stored in fasl_paths[] would have been allocated using malloc(), * and just discarding it as here will represent a space-leak. Just for now * I am going to accept that as an unimportant detail. */ fasl_paths[j] = NULL; if (d == NULL) return NO; if (d->h.updated & D_COMPACT) { int i; long int hwm; if (d->f == NULL) return YES; d->h.updated |= D_UPDATED; sort_directory(d); hwm = sizeof(directory_header) + get_dirsize(d->h)*(long int)sizeof(directory_entry) + REGISTRATION_SIZE; for (i=0; i<get_dirused(d->h); i++) { long int pos = bits32(&d->d[i].D_position); if (pos != hwm) { char *b = 16 + (char *)stack; char small_buffer[64]; /* I add 4 to the length specified here to allow for checksums */ long int len = bits24(&d->d[i].D_size) + 4L; long int newpos = hwm; while (len != 0) { size_t n = (size_t)((CSL_PAGE_SIZE - 64 - ((char *)stack - (char *)stackbase)) & (~(int32)0xff)); /* * I only perform compression of the file when I am in the process of stopping, * and in that case the Lisp stack is not in use, so I use if as a buffer. * WELL the above statement used to be true, but now it is not, since the * function CLOSE-LIBRARY does exactly what I have declared is never * possible. But all is not lost - I can afford to use that part of * the stack that remains unused. In cases where CLOSE-LIBRARY is called * just before a stack overflow was due the result will be utterly terrible * (on speed) but it should still be correct. So what you will see is that * I start my buffer 16 bytes above the active part of the stack, and * let it run to within 48 bytes of the top of the stack page, but * rounded down so I do transfers in multiples of 256 bytes. If there * is really no (Lisp) stack free I use a 64 byte local buffer. */ if (n == 0) b = small_buffer, n = sizeof(small_buffer); if (len < (long int)n) n = (size_t)len; fseek(d->f, pos, SEEK_SET); fread(b, 1, n, d->f); pos = ftell(d->f); fseek(d->f, newpos, SEEK_SET); fwrite(b, 1, n, d->f); newpos = ftell(d->f); len -= n; } setbits32(&d->d[i].D_position, (int32)hwm); } hwm += bits24(&d->d[i].D_size) + 4L; } fflush(d->f); if (hwm != bits32(d->h.eof)) { truncate_file(d->f, hwm); setbits32(d->h.eof, (int32)hwm); } } if (d->h.updated & D_UPDATED) { if (d->f == NULL || fflush(d->f) != 0) return YES; fseek(d->f, 0, SEEK_SET); if (fwrite(&d->h, sizeof(directory_header), 1, d->f) != 1) return YES; if (fwrite(&d->d[0], sizeof(directory_entry), (size_t)get_dirsize(d->h), d->f) != (size_t)get_dirsize(d->h)) return YES; if (fflush(d->f) != 0) return YES; } if (d->h.updated & D_PENDING) return NO; else if (d->f != NULL && fclose(d->f) != 0) return YES; else return NO; #endif /* DEMO_MODE */ } CSLbool Ifinished(void) /* * Indicates total completion of all work on image files, and so calls * for things to be (finally) tidied up. Again returns YES of anything * has gone wrong. */ { /* * Need to close all files here... loads of calls to fflush and fclose. * Actually only output files are a real issue here. And then only * the ones that are flagged as needing compaction. */ int j; CSLbool failed = NO; for (j=0; j<number_of_fasl_paths; j++) if (finished_with(j)) failed = YES; return failed; } int Igetc(void) /* * Returns next byte from current image sub-file, or EOF if either * real end-of-file or on failure. As a special fudge here (ugh) I * use a negative value of read_bytes_remaining to indicate that * input should NOT be from the usual image-file mechanism, but from * the currently selected standard input. Setting things up that way * then supports processing of FASL files from almost arbitrary * sources. */ { long int nn = read_bytes_remaining; int c; unsigned32 chk_temp; if (nn <= 0) { if (nn == 0) return EOF; else { Lisp_Object nil = C_nil; Lisp_Object stream = qvalue(standard_input); if (!is_stream(stream)) return EOF; c = getc_stream(stream); nil = C_nil; if (exception_pending()) return EOF; } } else { read_bytes_remaining = nn - 1; c = getc(binary_read_file); } if (c == EOF) return c; update_crc(subfile_checksum, c); if (crypt_active >= 0) { if (crypt_count >= CRYPT_BLOCK) { crypt_get_block(crypt_buffer); crypt_count = 0; } c ^= crypt_buffer[crypt_count++]; } return (c & 0xff); } #ifdef SIXTEEN_BIT #define FREAD_CHUNK 0x4000 #endif int32 Iread(void *buff, int32 size) /* * Reads (size) bytes into the indicated buffer. Returns number of * bytes read. Decrypts if crypt_active >= 0. */ { unsigned char *p = (unsigned char *)buff; int32 n = 0; unsigned32 chk_temp; int i; size_t n1; long int nn = read_bytes_remaining; if (nn < 0) { for (i=0; i<size; i++) { int c = Igetc(); if (c == EOF) return i; p[i] = (char)c; } return i; } if (size > nn) size = (int32)nn; /* Do not go beyond end of file */ #ifdef FREAD_CHUNK /* * Iread can read a number of bytes that is specified by an int32, so on * 16 bit implementations I will need to issue a sequence of calls to fread(), * each transferring < 64Kbytes (in fact I do 16K at a time). */ while (size >= FREAD_CHUNK) { n1 = fread(p, 1, FREAD_CHUNK, binary_read_file); for (i=0; i<(int)n1; i++) { int c = p[i]; update_crc(subfile_checksum, c); if (crypt_active >= 0) { if (crypt_count >= CRYPT_BLOCK) { crypt_get_block(crypt_buffer); crypt_count = 0; } c ^= crypt_buffer[crypt_count++]; p[i] = c; } } read_bytes_remaining -= n1; if (n1 != FREAD_CHUNK) return n + n1; p += n1; size -= n1; n += n1; } #endif if (size == 0) return n; n1 = fread(p, 1, (size_t)size, binary_read_file); /* * Updating the checksum here is probably a painful extra cost, but I count * the security it gives me as worthwhile. I compute the checksum byte at a * time so that it is not sensitive to the byte ordering of the machine used. */ for (i=0; i<(int)n1; i++) { int c = p[i]; update_crc(subfile_checksum, c); if (crypt_active >= 0) { if (crypt_count >= CRYPT_BLOCK) { crypt_get_block(crypt_buffer); crypt_count = 0; } c ^= crypt_buffer[crypt_count++]; p[i] = (char)c; } } read_bytes_remaining -= n1; return n + n1; } long int Ioutsize(void) { return write_bytes_written; } CSLbool Iputc(int ch) /* * Puts one character into image system, returning YES if there * was trouble. */ { #ifdef DEMO_MODE return YES; #else unsigned32 chk_temp; Lisp_Object nil = C_nil; write_bytes_written++; if (crypt_active >= 0) { if (crypt_count >= CRYPT_BLOCK) { crypt_get_block(crypt_buffer); crypt_count = 0; } ch ^= crypt_buffer[crypt_count++]; } update_crc(subfile_checksum, ch); if (fasl_stream != nil && fasl_stream != SPID_NIL) putc_stream(ch, fasl_stream); else if (putc(ch, binary_write_file) == EOF) return YES; return NO; #endif /* DEMO_MODE */ } #define FWRITE_CHUNK 0x4000 CSLbool Iwrite(void *buff, int32 size) /* * Writes (size) bytes from the given buffer, returning YES if trouble. */ { #ifdef DEMO_MODE return YES; #else unsigned char *p = (unsigned char *)buff; int32 i; unsigned32 chk_temp; Lisp_Object nil = C_nil; if (crypt_active >= 0 || (fasl_stream != nil && fasl_stream != SPID_NIL)) { /* * Note that in this case the checksum is updated within Iputc() so I do * not have to do anything special about it here. */ for (i=0; i<size; i++) if (Iputc(p[i])) return YES; return NO; } /* * If encrypted writing is active I will have gone through Iputc for * every individual character and so will not get down to here. Thus the * optimised calls to fwrite() can remain intact. */ for (i=0; i<size; i++) { /* Beware - update_crc is a macro and the {} block here is essential */ update_crc(subfile_checksum, p[i]); } write_bytes_written += size; while (size >= FWRITE_CHUNK) { if (fwrite(p, 1, FWRITE_CHUNK, binary_write_file) != FWRITE_CHUNK) return YES; p += FWRITE_CHUNK; size -= FWRITE_CHUNK; } if (size == 0) return NO; else return (fwrite(p, 1, (size_t)size, binary_write_file) != (size_t)size); #endif /* DEMO_MODE */ } /* * Now code that maps real pointers into references relative * to page numbers. Here I will also go to the trouble of putting zero * bytes in unused bits of memory - that will make checkpoint files * compress better and will also make them independent of all actual * addresses used on the host machine. Observe that the representation * created has to depend a bit on the current page size. */ #define PACK_PAGE_OFFSET(pg, of) ((pg << PAGE_BITS) + of) static void unadjust(Lisp_Object *cp) /* * If p is a pointer to an object that has moved, unadjust it. */ { #ifndef DEMO_MODE Lisp_Object nil = C_nil, p = (*cp); /* Beware "=*" anachronism! */ if (p == nil) { *cp = SPID_NIL; /* Marks NIL in preserve files */ return; } else if (is_cons(p)) { int32 i; for (i=0; i<heap_pages_count; i++) { void *page = heap_pages[i]; char *base = (char *)quadword_align_up((intxx)page); /* * The next line is pretty dodgy - I want to decide which segment a * pointer references, but pointer comparisons are only valid within * single segments. I cast to int and cross my fingers! Actually no * REASONABLE C system would fail on this - it is just that ANSI specifies * that you can only do any address arithmetic WITHIN the area returned * by a single malloc() (etc). */ if ((intxx)base <= (intxx)p && (intxx)p <= (intxx)(base+CSL_PAGE_SIZE)) { unsigned int offset = (unsigned int)((char *)p - base); *cp = PACK_PAGE_OFFSET(i, offset); return; } } term_printf("\n[%lx] Cons address %lx not found in heap\n", (long)cp, (long)p); abort(); } else if (!is_immed_or_cons(p)) { int32 i; /* vectors get relocated here */ for (i=0; i<vheap_pages_count; i++) { void *page = vheap_pages[i]; char *base = (char *)doubleword_align_up((intxx)page); /* see comments above re the next line */ if ((intxx)base <= (intxx)p && (intxx)p <= (intxx)(base+CSL_PAGE_SIZE)) { unsigned int offset = (unsigned int)((char *)p - base); *cp = PACK_PAGE_OFFSET(i, offset); return; } } term_printf("\n[%.8lx] Vector address %.8lx not found in heap\n", (long)cp, (long)p); abort(); } #endif /* DEMO_MODE */ } static void unadjust_consheap(void) { #ifndef DEMO_MODE int32 page_number; for (page_number = 0; page_number < heap_pages_count; page_number++) { void *page = heap_pages[page_number]; char *low = (char *)quadword_align_up((intxx)page); char *start = low + CSL_PAGE_SIZE; char *fr = low + car32(low); /* The next line sets unused space in the page to be zero */ while ((fr -= sizeof(Lisp_Object)) != low) qcar(fr) = 0; fr = low + car32(low); while (fr < start) { unadjust((Lisp_Object *)fr); fr += sizeof(Lisp_Object); } } #endif /* DEMO_MODE */ } static void convert_word_order(void *p) { /* * This bit seems a bit strange to me. I cope with all other * byte order issues by having the exporting machine dump data * in its own native format and then fixing things up again when * I re-load. Why not do that here? However what I *do* do is to keep * image files in a single WORD order in image files but let the bytes * within words fall how they do. But during the transition to support * of full 64-bit machines I will disable all attempts at byte correction * when in 64-bit mode... */ #ifndef ADDRESS_64 if ((current_fp_rep & FP_WORD_ORDER) != 0) { unsigned32 *f = (unsigned32 *)p; unsigned32 w = f[0]; f[0] = f[1]; f[1] = w; } #endif } static struct entry_lookup { int32 code; intxx entry; char *s; } entry_lookup[entry_table_size]; static int MS_CDECL order_lookup_entries(void const *aa, void const *bb) { struct entry_lookup *a = (struct entry_lookup *)aa, *b = (struct entry_lookup *)bb; intxx ap = a->entry, bp = b->entry; if (ap < bp) return -1; else if (ap > bp) return 1; else return 0; } static void set_up_entry_lookup(void) /* * This makes a sorted version of entries_table. Since the table is * only a few dozen words long it hardly seems worth being too clever, * but the C library provides qsort() for me so I use it. */ { int i; for (i=0; i<entry_table_size; i++) { entry_lookup[i].code = i; entry_lookup[i].entry = (intxx)entries_table[i].p; entry_lookup[i].s = entries_table[i].s; } qsort((void *)entry_lookup, entry_table_size, sizeof(struct entry_lookup), order_lookup_entries); } static int32 code_up_fn(intxx e) { int low = 0, high = entry_table_size-1; while (low < high) { int mid = (high + low)/2; intxx s = entry_lookup[mid].entry; if (s == e) return entry_lookup[mid].code; if (s < e) low = mid + 1; else high = mid - 1; } if (low == high && entry_lookup[low].entry == e) return entry_lookup[low].code; else return 0; } static void unadjust_vecheap(void) { #ifndef DEMO_MODE int32 page_number, i; for (page_number = 0; page_number < vheap_pages_count; page_number++) { void *page = vheap_pages[page_number]; char *low = (char *)doubleword_align_up((intxx)page); char *high = low + (CSL_PAGE_SIZE - 8); char *fr = low + car32(low); low += 8; while (low < fr) { Header h = *(Header *)low; if (is_symbol_header(h)) { Lisp_Object s = (Lisp_Object)(low+TAG_SYMBOL); ifn1(s) = code_up_fn(ifn1(s)); ifn2(s) = code_up_fn(ifn2(s)); ifnn(s) = code_up_fn(ifnn(s)); unadjust(&qvalue(s)); unadjust(&qenv(s)); unadjust(&qpname(s)); unadjust(&qplist(s)); unadjust(&qfastgets(s)); #ifdef COMMON unadjust(&qpackage(s)); #endif low += symhdr_length; continue; } else switch (type_of_header(h)) { #ifdef COMMON case TYPE_RATNUM: case TYPE_COMPLEX_NUM: unadjust((Lisp_Object *)(low+CELL)); unadjust((Lisp_Object *)(low+2*CELL)); break; #endif case TYPE_HASH: case TYPE_SIMPLE_VEC: case TYPE_ARRAY: case TYPE_STRUCTURE: for (i=CELL; i<doubleword_align_up(length_of_header(h)); i+=CELL) unadjust((Lisp_Object *)(low+i)); break; case TYPE_STREAM: { Lisp_Object ss = (Lisp_Object)(low+TAG_VECTOR); /* * It might make rather good sense to close any file or pipe streams * that I come across at this stage... */ if (elt(ss, 4) == (intxx)char_to_file && elt(ss, 3) != 0) { fclose(stream_file(ss)); set_stream_write_fn(ss, char_to_illegal); set_stream_write_other(ss, write_action_illegal); set_stream_file(ss, NULL); } #ifdef PIPES if (elt(ss, 4) == (intxx)char_to_pipeout && elt(ss, 3) != 0) { my_pclose(stream_file(ss)); set_stream_write_fn(ss, char_to_illegal); set_stream_write_other(ss, write_action_illegal); set_stream_file(ss, NULL); } #endif if (elt(ss, 8) == (intxx)char_from_file && elt(ss, 3) != 0) { fclose(stream_file(ss)); set_stream_read_fn(ss, char_from_illegal); set_stream_read_other(ss, read_action_illegal); set_stream_file(ss, NULL); } elt(ss, 4) = code_up_fn(elt(ss, 4)); elt(ss, 5) = code_up_fn(elt(ss, 5)); elt(ss, 8) = code_up_fn(elt(ss, 8)); elt(ss, 9) = code_up_fn(elt(ss, 9)); } case TYPE_MIXED1: case TYPE_MIXED2: case TYPE_MIXED3: for (i=CELL; i<4*CELL; i+=CELL) unadjust((Lisp_Object *)(low+i)); break; case TYPE_DOUBLE_FLOAT: convert_word_order((void *)(low + 8)); break; #ifdef COMMON case TYPE_SINGLE_FLOAT: break; case TYPE_LONG_FLOAT: /* If long floats were 3 words long I might need to adjust this code... */ convert_word_order((void *)(low + 8)); break; #endif default: break; } low += doubleword_align_up(length_of_header(h)); } /* * Now clean up the unused space in the page... */ while (low <= high) { qcar(low) = 0; qcdr(low) = 0; low += 2*sizeof(Lisp_Object); } } #endif /* DEMO_MODE */ } static void unadjust_bpsheap(void) { #ifndef DEMO_MODE int32 page_number; for (page_number = 0; page_number < bps_pages_count; page_number++) { void *page = bps_pages[page_number]; char *low = (char *)doubleword_align_up((intxx)page); char *fr = low + car32(low); /* Clean up unused space */ while ((fr -= sizeof(Lisp_Object)) != low) qcar(fr) = 0; fr = low + qcar(low); while (fr < low + CSL_PAGE_SIZE) { Header h = *(Header *)fr; #ifdef ENVIRONMENT_VECTORS_IN_BPS_HEAP switch (type_of_header(h)) { /* This option is not actually used at present... */ case TYPE_SIMPLE_VEC: for (i=CELL; i<doubleword_align_up(length_of_header(h)); i+=CELL) unadjust((Lisp_Object *)(fr+i)); break; default: break; } #endif fr += doubleword_align_up(length_of_header(h)); } } #endif /* DEMO_MODE */ } static void unadjust_all(void) { #ifndef DEMO_MODE int32 i; Lisp_Object nil = C_nil; set_up_entry_lookup(); qheader(nil) = TAG_ODDS+TYPE_SYMBOL+SYM_SPECIAL_VAR; qvalue(nil) = 0; qenv(nil) = 0; ifn1(nil) = 0; ifn2(nil) = 0; ifnn(nil) = 0; unadjust(&(qpname(nil))); /* not a gensym */ unadjust(&(qplist(nil))); unadjust(&(qfastgets(nil))); #ifdef COMMON unadjust(&(qpackage(nil))); #endif copy_into_nilseg(YES); eq_hash_table_list = eq_hash_tables; equal_hash_table_list = equal_hash_tables; for (i = first_nil_offset; i<last_nil_offset; i++) unadjust(&BASE[i]); copy_out_of_nilseg(YES); unadjust_consheap(); unadjust_vecheap(); unadjust_bpsheap(); #endif /* DEMO_MODE */ } void preserve_native_code(void) { #ifndef DEMO_MODE /* * I should maybe worry a little more here about IO errors... */ int i; if (!native_pages_changed) return; if (open_output(NULL, -native_code_tag)) { term_printf("Failed to open module for native code storage\n"); return; } Iputc(native_pages_count & 0xff); Iputc((native_pages_count>>8) & 0xff); /* * The FINAL native page will in general not be full, so I put a count of * the number of bytes in it that are in use in its first word, and * zero out the parts of it beyond there. Then the file compression that * routinely use when writing into image files. */ if (native_pages_count != 0) { intxx p = (intxx)native_pages[native_pages_count-1]; p = doubleword_align_up(p); car32(p) = native_fringe; memset((char *)p+native_fringe, 0, CSL_PAGE_SIZE-native_fringe); } for (i=0; i<native_pages_count; i++) { intxx p = (intxx)native_pages[i]; p = doubleword_align_up(p); Cfwrite((char *)p, CSL_PAGE_SIZE); } IcloseOutput(); #endif /* DEMO_MODE */ } void preserve(char *banner) { #ifdef DEMO_MODE err_printf("\nThe demo systen can not save a checkpoint file\n"); give_up(); return; #else int32 i; CSLbool int_flag = NO; Lisp_Object nil = C_nil; /* * I dump out any altered chunk of native code before I mangle the heap * up. */ preserve_native_code(); if (Iopen(NULL, 0, NO, NULL)) { err_printf("+++ PRESERVE failed to open image file\n"); return; } /* * I set a whole bunch of things to NIL here. If spurious data is left over * in global list-bases from a previous calculation it could clog up the * heap and waste a lot of space... */ #ifdef NILSEG_EXTERNS for (i=0; i<=50; i++) workbase[i] = nil; #else for (i=work_0_offset; i<last_nil_offset; i++) BASE[i] = nil; #endif exit_tag = exit_value = catch_tags = codevec = litvec = B_reg = faslvec = faslgensyms = nil; reclaim(nil, "preserve", GC_PRESERVE, 0); /* FULL garbage collection */ nil = C_nil; /* * if the user generated a SIGINT this is where it gets noticed... */ if (exception_pending()) { flip_exception(); int_flag = YES; } { char msg[128]; time_t t0 = time(0); for (i=0; i<128; i++) msg[i] = ' '; if (banner[0] == 0) msg[0] = 0; else sprintf(msg, "%.60s", banner); /* 26 bytes starting from byte 64 shows the time of the dump */ sprintf(msg+64, "%.25s\n", ctime(&t0)); /* 16 bytes starting at byte 90 are for a checksum of the u01.c etc checks */ get_user_files_checksum((unsigned char *)&msg[90]); /* 106 to 109 free at present but available if checksum goes to 160 bits */ /* 1 byte at 110 marks an encrypted image (work in progress!) */ msg[110] = 0; /* The final byte at 111 indicates whether compression is to be used */ { int32 cc = compression_worth_while; int fg = 0; while (cc > 128) fg++, cc >>= 1; msg[111] = (char)fg; } Cfwrite(msg, 112); /* Exactly 112 bytes in the header records */ } unadjust_all(); /* Turn all pointers into base-offset form */ Cfwrite("\nNilseg:", 8); copy_into_nilseg(YES); { Lisp_Object saver[9]; for (i=0; i<9; i++) saver[i] = BASE[i+13], BASE[i+13] = 0; /* codefringe */ /* codelimit */ /* stacklimit */ /* ... ditto */ /* ... ditto */ /* fringe */ /* heaplimit */ /* vheaplimit */ /* vfringe */ Cfwrite((char *)BASE, sizeof(Lisp_Object)*last_nil_offset); for (i=0; i<9; i++) BASE[i+13] = saver[i]; } Cfwrite((char *)&heap_pages_count, sizeof(heap_pages_count)); Cfwrite((char *)&vheap_pages_count, sizeof(vheap_pages_count)); Cfwrite((char *)&bps_pages_count, sizeof(bps_pages_count)); Cfwrite("\nVecseg:", 8); for (i=0; i<vheap_pages_count; i++) { intxx p = (intxx)vheap_pages[i]; Cfwrite((char *)doubleword_align_up(p), CSL_PAGE_SIZE); } Cfwrite("\nConsseg", 8); for (i=0; i<heap_pages_count; i++) { intxx p = (intxx)heap_pages[i]; Cfwrite((char *)quadword_align_up(p), CSL_PAGE_SIZE); } Cfwrite("\nCodeseg", 8); for (i=0; i<bps_pages_count; i++) { intxx p = (intxx)bps_pages[i]; Cfwrite((char *)doubleword_align_up(p), CSL_PAGE_SIZE); } #ifndef COMMON Cfwrite("\n\nEnd of CSL dump file\n\n", 24); #else Cfwrite("\n\nEnd of CCL dump file\n\n", 24); #endif /* * Here I pad the image file to be a multiple of 4 bytes long. Since it is a * binary file the '\n' characters I put in will always be just 1 byte each * (for text files that might have expanded). See comments in fasl.c for * a diatribe about why I do this, or at least why rather a long while ago * this was necessary on at least one sort of computer. */ { int k = (int)((-write_bytes_written) & 3); while (k != 0) k--, Iputc(NEWLINE_CHAR); } /* flip_needed = NO; Since I stop after (preserve) these lines are unnecessary? old_fp_rep = current_fp_rep; */ /* * I need to check for write errors here and moan if there were any... */ if (IcloseOutput()) error(0, err_write_err); if (int_flag) term_printf("\nInterrupt during (preserve) was ignored\n"); return; #endif /* DEMO_MODE */ } /* end of file preserve.c */