Annotation of OpenXM_contrib2/asir2000/parse/history.c, Revision 1.1
1.1 ! noro 1: /* $OpenXM: OpenXM/src/asir99/parse/history.c,v 1.1.1.1 1999/11/10 08:12:34 noro Exp $ */
! 2: #include <stdio.h>
! 3: #include <string.h>
! 4: #include <malloc.h>
! 5:
! 6: char *prev_hist(void), *next_hist(void), *search_hist(char *p);
! 7: void write_hist(char *fname), read_hist(char *fname);
! 8: void add_hist(char *p), init_hist(int max);
! 9: void reset_traverse(void);
! 10:
! 11: static char **hist_table;
! 12: static int hist_full, hist_current, hist_length;
! 13: static int hist_traverse, hist_traverse_index;
! 14: #define CURRENT (hist_table[hist_current])
! 15:
! 16: void init_hist(int max)
! 17: {
! 18: hist_length = max;
! 19: hist_table = (char **)calloc(hist_length,sizeof(char *));
! 20: hist_full = 0;
! 21: hist_current = -1;
! 22: }
! 23:
! 24: void reset_traverse(void)
! 25: {
! 26: hist_traverse = 0;
! 27: }
! 28:
! 29: void add_hist(char *p)
! 30: {
! 31: if ( hist_current >= 0 && CURRENT && !strcmp(p,CURRENT) )
! 32: return;
! 33: hist_current++;
! 34: if ( hist_current == hist_length ) {
! 35: hist_current = 0;
! 36: hist_full = 1;
! 37: }
! 38: CURRENT = (char *)realloc(CURRENT,strlen(p)+1);
! 39: strcpy(CURRENT,p);
! 40: }
! 41:
! 42: char *search_hist(char *p)
! 43: {
! 44: int len,slen,index,i;
! 45:
! 46: if ( *p == '!' ) {
! 47: if ( hist_current < 0 )
! 48: return 0;
! 49: else
! 50: return CURRENT;
! 51: }
! 52: slen = strlen(p);
! 53: len = hist_full ? hist_length : hist_current+1;
! 54: index = hist_current;
! 55: for ( i = len; i; i--, index-- ) {
! 56: if ( index < 0 )
! 57: index += hist_length;
! 58: if ( !strncmp(p,hist_table[index],slen) )
! 59: return hist_table[index];
! 60: }
! 61: return 0;
! 62: }
! 63:
! 64: void read_hist(char *fname)
! 65: {
! 66: int l;
! 67: char buf[BUFSIZ];
! 68: FILE *fp;
! 69:
! 70: if ( !(fp = fopen(fname,"rb")) )
! 71: return;
! 72: while ( fgets(buf,BUFSIZ-1,fp) ) {
! 73: l = strlen(buf);
! 74: if ( buf[l-1] == '\n' )
! 75: buf[l-1] = 0;
! 76: add_hist(buf);
! 77: }
! 78: fclose(fp);
! 79: }
! 80:
! 81: void write_hist(char *fname)
! 82: {
! 83: int len,index,i;
! 84: FILE *fp;
! 85:
! 86: if ( !(fp = fopen(fname,"wb")) )
! 87: return;
! 88: len = hist_full ? hist_length : hist_current+1;
! 89: index = hist_full ? hist_current+1 : 0;
! 90: for ( i = 0; i < len; i++, index++ ) {
! 91: if ( index >= hist_length )
! 92: index -= hist_length;
! 93: fprintf(fp,"%s\n",hist_table[index]);
! 94: }
! 95: fclose(fp);
! 96: }
! 97:
! 98: char *next_hist(void) {
! 99: if ( !hist_traverse || hist_traverse_index == hist_current )
! 100: return 0;
! 101: else {
! 102: hist_traverse_index = (hist_traverse_index+1) % hist_length;
! 103: return hist_table[hist_traverse_index];
! 104: }
! 105: }
! 106:
! 107: char *prev_hist(void) {
! 108: if ( !hist_traverse ) {
! 109: if ( hist_current >= 0 ) {
! 110: hist_traverse = 1;
! 111: hist_traverse_index = hist_current;
! 112: return hist_table[hist_traverse_index];
! 113: } else
! 114: return 0;
! 115: } else {
! 116: hist_traverse_index--;
! 117: if ( hist_traverse_index < 0 )
! 118: if ( hist_full )
! 119: hist_traverse_index += hist_length;
! 120: else
! 121: hist_traverse_index = 0;
! 122: return hist_table[hist_traverse_index];
! 123: }
! 124: }
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