| /**************************************************************************** |
| * Copyright (c) 1998-2012,2013 Free Software Foundation, Inc. * |
| * * |
| * Permission is hereby granted, free of charge, to any person obtaining a * |
| * copy of this software and associated documentation files (the * |
| * "Software"), to deal in the Software without restriction, including * |
| * without limitation the rights to use, copy, modify, merge, publish, * |
| * distribute, distribute with modifications, sublicense, and/or sell * |
| * copies of the Software, and to permit persons to whom the Software is * |
| * furnished to do so, subject to the following conditions: * |
| * * |
| * The above copyright notice and this permission notice shall be included * |
| * in all copies or substantial portions of the Software. * |
| * * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * |
| * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * |
| * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * |
| * * |
| * Except as contained in this notice, the name(s) of the above copyright * |
| * holders shall not be used in advertising or otherwise to promote the * |
| * sale, use or other dealings in this Software without prior written * |
| * authorization. * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * |
| * and: Eric S. Raymond <esr@snark.thyrsus.com> * |
| * and: Thomas E. Dickey 1996-on * |
| ****************************************************************************/ |
| |
| /* |
| * make_hash.c --- build-time program for constructing comp_captab.c |
| * |
| */ |
| |
| #include <build.priv.h> |
| |
| #include <tic.h> |
| #include <hashsize.h> |
| |
| #include <ctype.h> |
| |
| MODULE_ID("$Id: make_hash.c,v 1.13 2013/09/28 20:55:47 tom Exp $") |
| |
| /* |
| * _nc_make_hash_table() |
| * |
| * Takes the entries in table[] and hashes them into hash_table[] |
| * by name. There are CAPTABSIZE entries in table[] and HASHTABSIZE |
| * slots in hash_table[]. |
| * |
| */ |
| |
| #undef MODULE_ID |
| #define MODULE_ID(id) /*nothing */ |
| #include <tinfo/doalloc.c> |
| |
| static void |
| failed(const char *s) |
| { |
| perror(s); |
| exit(EXIT_FAILURE); |
| } |
| |
| static char * |
| strmalloc(char *s) |
| { |
| size_t need = strlen(s) + 1; |
| char *result = malloc(need); |
| if (result == 0) |
| failed("strmalloc"); |
| _nc_STRCPY(result, s, need); |
| return result; |
| } |
| |
| /* |
| * int hash_function(string) |
| * |
| * Computes the hashing function on the given string. |
| * |
| * The current hash function is the sum of each consectutive pair |
| * of characters, taken as two-byte integers, mod HASHTABSIZE. |
| * |
| */ |
| |
| static int |
| hash_function(const char *string) |
| { |
| long sum = 0; |
| |
| while (*string) { |
| sum += (long) (*string + (*(string + 1) << 8)); |
| string++; |
| } |
| |
| return (int) (sum % HASHTABSIZE); |
| } |
| |
| static void |
| _nc_make_hash_table(struct name_table_entry *table, |
| HashValue * hash_table) |
| { |
| short i; |
| int hashvalue; |
| int collisions = 0; |
| |
| for (i = 0; i < HASHTABSIZE; i++) { |
| hash_table[i] = -1; |
| } |
| for (i = 0; i < CAPTABSIZE; i++) { |
| hashvalue = hash_function(table[i].nte_name); |
| |
| if (hash_table[hashvalue] >= 0) |
| collisions++; |
| |
| if (hash_table[hashvalue] != 0) |
| table[i].nte_link = hash_table[hashvalue]; |
| hash_table[hashvalue] = i; |
| } |
| |
| printf("/* %d collisions out of %d entries */\n", collisions, CAPTABSIZE); |
| } |
| |
| /* |
| * This filter reads from standard input a list of tab-delimited columns, |
| * (e.g., from Caps.filtered) computes the hash-value of a specified column and |
| * writes the hashed tables to standard output. |
| * |
| * By compiling the hash table at build time, we're able to make the entire |
| * set of terminfo and termcap tables readonly (and also provide some runtime |
| * performance enhancement). |
| */ |
| |
| #define MAX_COLUMNS BUFSIZ /* this _has_ to be worst-case */ |
| |
| static int |
| count_columns(char **list) |
| { |
| int result = 0; |
| if (list != 0) { |
| while (*list++) { |
| ++result; |
| } |
| } |
| return result; |
| } |
| |
| static char ** |
| parse_columns(char *buffer) |
| { |
| static char **list; |
| |
| int col = 0; |
| |
| if (list == 0 && (list = typeCalloc(char *, (MAX_COLUMNS + 1))) == 0) |
| return (0); |
| |
| if (*buffer != '#') { |
| while (*buffer != '\0') { |
| char *s; |
| for (s = buffer; (*s != '\0') && !isspace(UChar(*s)); s++) |
| /*EMPTY */ ; |
| if (s != buffer) { |
| char mark = *s; |
| *s = '\0'; |
| if ((s - buffer) > 1 |
| && (*buffer == '"') |
| && (s[-1] == '"')) { /* strip the quotes */ |
| assert(s > buffer + 1); |
| s[-1] = '\0'; |
| buffer++; |
| } |
| list[col] = buffer; |
| col++; |
| if (mark == '\0') |
| break; |
| while (*++s && isspace(UChar(*s))) |
| /*EMPTY */ ; |
| buffer = s; |
| } else |
| break; |
| } |
| } |
| return col ? list : 0; |
| } |
| |
| int |
| main(int argc, char **argv) |
| { |
| struct name_table_entry *name_table = typeCalloc(struct |
| name_table_entry, CAPTABSIZE); |
| HashValue *hash_table = typeCalloc(HashValue, HASHTABSIZE); |
| const char *root_name = ""; |
| int column = 0; |
| int bigstring = 0; |
| int n; |
| char buffer[BUFSIZ]; |
| |
| static const char *typenames[] = |
| {"BOOLEAN", "NUMBER", "STRING"}; |
| |
| short BoolCount = 0; |
| short NumCount = 0; |
| short StrCount = 0; |
| |
| /* The first argument is the column-number (starting with 0). |
| * The second is the root name of the tables to generate. |
| */ |
| if (argc <= 3 |
| || (column = atoi(argv[1])) <= 0 |
| || (column >= MAX_COLUMNS) |
| || *(root_name = argv[2]) == 0 |
| || (bigstring = atoi(argv[3])) < 0 |
| || name_table == 0 |
| || hash_table == 0) { |
| fprintf(stderr, "usage: make_hash column root_name bigstring\n"); |
| exit(EXIT_FAILURE); |
| } |
| |
| /* |
| * Read the table into our arrays. |
| */ |
| for (n = 0; (n < CAPTABSIZE) && fgets(buffer, BUFSIZ, stdin);) { |
| char **list, *nlp = strchr(buffer, '\n'); |
| if (nlp) |
| *nlp = '\0'; |
| list = parse_columns(buffer); |
| if (list == 0) /* blank or comment */ |
| continue; |
| if (column > count_columns(list)) { |
| fprintf(stderr, "expected %d columns, have %d:\n%s\n", |
| column, |
| count_columns(list), |
| buffer); |
| exit(EXIT_FAILURE); |
| } |
| name_table[n].nte_link = -1; /* end-of-hash */ |
| name_table[n].nte_name = strmalloc(list[column]); |
| if (!strcmp(list[2], "bool")) { |
| name_table[n].nte_type = BOOLEAN; |
| name_table[n].nte_index = BoolCount++; |
| } else if (!strcmp(list[2], "num")) { |
| name_table[n].nte_type = NUMBER; |
| name_table[n].nte_index = NumCount++; |
| } else if (!strcmp(list[2], "str")) { |
| name_table[n].nte_type = STRING; |
| name_table[n].nte_index = StrCount++; |
| } else { |
| fprintf(stderr, "Unknown type: %s\n", list[2]); |
| exit(EXIT_FAILURE); |
| } |
| n++; |
| } |
| _nc_make_hash_table(name_table, hash_table); |
| |
| /* |
| * Write the compiled tables to standard output |
| */ |
| if (bigstring) { |
| int len = 0; |
| int nxt; |
| |
| printf("static const char %s_names_text[] = \\\n", root_name); |
| for (n = 0; n < CAPTABSIZE; n++) { |
| nxt = (int) strlen(name_table[n].nte_name) + 5; |
| if (nxt + len > 72) { |
| printf("\\\n"); |
| len = 0; |
| } |
| printf("\"%s\\0\" ", name_table[n].nte_name); |
| len += nxt; |
| } |
| printf(";\n\n"); |
| |
| len = 0; |
| printf("static name_table_data const %s_names_data[] =\n", |
| root_name); |
| printf("{\n"); |
| for (n = 0; n < CAPTABSIZE; n++) { |
| printf("\t{ %15d,\t%10s,\t%3d, %3d }%c\n", |
| len, |
| typenames[name_table[n].nte_type], |
| name_table[n].nte_index, |
| name_table[n].nte_link, |
| n < CAPTABSIZE - 1 ? ',' : ' '); |
| len += (int) strlen(name_table[n].nte_name) + 1; |
| } |
| printf("};\n\n"); |
| printf("static struct name_table_entry *_nc_%s_table = 0;\n\n", root_name); |
| } else { |
| |
| printf("static struct name_table_entry const _nc_%s_table[] =\n", |
| root_name); |
| printf("{\n"); |
| for (n = 0; n < CAPTABSIZE; n++) { |
| _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "\"%s\"", |
| name_table[n].nte_name); |
| printf("\t{ %15s,\t%10s,\t%3d, %3d }%c\n", |
| buffer, |
| typenames[name_table[n].nte_type], |
| name_table[n].nte_index, |
| name_table[n].nte_link, |
| n < CAPTABSIZE - 1 ? ',' : ' '); |
| } |
| printf("};\n\n"); |
| } |
| |
| printf("static const HashValue _nc_%s_hash_table[%d] =\n", |
| root_name, |
| HASHTABSIZE + 1); |
| printf("{\n"); |
| for (n = 0; n < HASHTABSIZE; n++) { |
| printf("\t%3d,\n", hash_table[n]); |
| } |
| printf("\t0\t/* base-of-table */\n"); |
| printf("};\n\n"); |
| |
| printf("#if (BOOLCOUNT!=%d)||(NUMCOUNT!=%d)||(STRCOUNT!=%d)\n", |
| BoolCount, NumCount, StrCount); |
| printf("#error\t--> term.h and comp_captab.c disagree about the <--\n"); |
| printf("#error\t--> numbers of booleans, numbers and/or strings <--\n"); |
| printf("#endif\n\n"); |
| |
| free(hash_table); |
| return EXIT_SUCCESS; |
| } |