xref.c
上传用户:shmaik
上传日期:2014-06-01
资源大小:45093k
文件大小:3k
- static char rcsid[] = "$Id: H:/drh/idioms/book/RCS/set.doc,v 1.11 1996/06/26 23:02:01 drh Exp $";
- #include <stdio.h>
- #include <stdlib.h>
- #include <errno.h>
- #include "table.h"
- #include <string.h>
- #include "atom.h"
- #include "set.h"
- #include "mem.h"
- #include "getword.h"
- #include <ctype.h>
- int compare(const void *x, const void *y);
- void print(Table_T);
- int cmpint(const void *x, const void *y);
- void xref(const char *, FILE *, Table_T);
- int first(int c);
- int rest (int c);
- int intcmp (const void *x, const void *y);
- unsigned inthash(const void *x);
- int linenum;
- int main(int argc, char *argv[]) {
- int i;
- Table_T identifiers = Table_new(0, NULL, NULL);
- for (i = 1; i < argc; i++) {
- FILE *fp = fopen(argv[i], "r");
- if (fp == NULL) {
- fprintf(stderr, "%s: can't open '%s' (%s)n",
- argv[0], argv[i], strerror(errno));
- return EXIT_FAILURE;
- } else {
- xref(argv[i], fp, identifiers);
- fclose(fp);
- }
- }
- if (argc == 1) xref(NULL, stdin, identifiers);
- {
- int i;
- void **array = Table_toArray(identifiers, NULL);
- qsort(array, Table_length(identifiers),
- 2*sizeof (*array), compare);
- for (i = 0; array[i]; i += 2) {
- printf("%s", (char *)array[i]);
- print(array[i+1]);
- }
- FREE(array);
- }
- return EXIT_SUCCESS;
- }
- int compare(const void *x, const void *y) {
- return strcmp(*(char **)x, *(char **)y);
- }
- void print(Table_T files) {
- int i;
- void **array = Table_toArray(files, NULL);
- qsort(array, Table_length(files), 2*sizeof (*array),
- compare);
- for (i = 0; array[i]; i += 2) {
- if (*(char *)array[i] != ' ')
- printf("t%s:", (char *)array[i]);
- {
- int j;
- void **lines = Set_toArray(array[i+1], NULL);
- qsort(lines, Set_length(array[i+1]), sizeof (*lines),
- cmpint);
- for (j = 0; lines[j]; j++)
- printf(" %d", *(int *)lines[j]);
- FREE(lines);
- }
- printf("n");
- }
- FREE(array);
- }
- int cmpint(const void *x, const void *y) {
- if (**(int **)x < **(int **)y)
- return -1;
- else if (**(int **)x > **(int **)y)
- return +1;
- else
- return 0;
- }
- void xref(const char *name, FILE *fp,
- Table_T identifiers){
- char buf[128];
- if (name == NULL)
- name = "";
- name = Atom_string(name);
- linenum = 1;
- while (getword(fp, buf, sizeof buf, first, rest)) {
- Set_T set;
- Table_T files;
- const char *id = Atom_string(buf);
- files = Table_get(identifiers, id);
- if (files == NULL) {
- files = Table_new(0, NULL, NULL);
- Table_put(identifiers, id, files);
- }
- set = Table_get(files, name);
- if (set == NULL) {
- set = Set_new(0, intcmp, inthash);
- Table_put(files, name, set);
- }
- {
- int *p = &linenum;
- if (!Set_member(set, p)) {
- NEW(p);
- *p = linenum;
- Set_put(set, p);
- }
- }
- }
- }
- int first(int c) {
- if (c == 'n')
- linenum++;
- return isalpha(c) || c == '_';
- }
- int rest(int c) {
- return isalpha(c) || c == '_' || isdigit(c);
- }
- int intcmp(const void *x, const void *y) {
- return cmpint(&x, &y);
- }
- unsigned inthash(const void *x) {
- return *(int *)x;
- }