Annotation of OpenXM_contrib2/windows/asir32gui/history.c, Revision 1.1
1.1 ! noro 1: #include <stdio.h>
! 2: #include <string.h>
! 3: #include <malloc.h>
! 4:
! 5: char *prev_hist(void), *next_hist(void), *search_hist(char *p);
! 6: void write_hist(char *fname), read_hist(char *fname);
! 7: void add_hist(char *p), init_hist(int max);
! 8: void reset_traverse(void);
! 9:
! 10: static char **hist_table;
! 11: static int hist_full, hist_current, hist_length;
! 12: static int hist_traverse, hist_traverse_index;
! 13: #define CURRENT (hist_table[hist_current])
! 14:
! 15: void init_hist(int max)
! 16: {
! 17: hist_length = max;
! 18: hist_table = (char **)calloc(hist_length,sizeof(char *));
! 19: hist_full = 0;
! 20: hist_current = -1;
! 21: }
! 22:
! 23: void reset_traverse(void)
! 24: {
! 25: hist_traverse = 0;
! 26: }
! 27:
! 28: void add_hist(char *p)
! 29: {
! 30: if ( hist_current >= 0 && CURRENT && !strcmp(p,CURRENT) )
! 31: return;
! 32: hist_current++;
! 33: if ( hist_current == hist_length ) {
! 34: hist_current = 0;
! 35: hist_full = 1;
! 36: }
! 37: CURRENT = (char *)realloc(CURRENT,strlen(p)+1);
! 38: strcpy(CURRENT,p);
! 39: }
! 40:
! 41: char *search_hist(char *p)
! 42: {
! 43: int len,slen,index,i;
! 44:
! 45: if ( *p == '!' ) {
! 46: if ( hist_current < 0 )
! 47: return 0;
! 48: else
! 49: return CURRENT;
! 50: }
! 51: slen = strlen(p);
! 52: len = hist_full ? hist_length : hist_current+1;
! 53: index = hist_current;
! 54: for ( i = len; i; i--, index-- ) {
! 55: if ( index < 0 )
! 56: index += hist_length;
! 57: if ( !strncmp(p,hist_table[index],slen) )
! 58: return hist_table[index];
! 59: }
! 60: return 0;
! 61: }
! 62:
! 63: void read_hist(char *fname)
! 64: {
! 65: int l;
! 66: char buf[BUFSIZ];
! 67: FILE *fp;
! 68:
! 69: if ( !(fp = fopen(fname,"rb")) )
! 70: return;
! 71: while ( fgets(buf,BUFSIZ-1,fp) ) {
! 72: l = strlen(buf);
! 73: if ( buf[l-1] == '\n' )
! 74: buf[l-1] = 0;
! 75: add_hist(buf);
! 76: }
! 77: fclose(fp);
! 78: }
! 79:
! 80: void write_hist(char *fname)
! 81: {
! 82: int len,index,i;
! 83: FILE *fp;
! 84:
! 85: if ( !(fp = fopen(fname,"wb")) )
! 86: return;
! 87: len = hist_full ? hist_length : hist_current+1;
! 88: index = hist_full ? hist_current+1 : 0;
! 89: for ( i = 0; i < len; i++, index++ ) {
! 90: if ( index >= hist_length )
! 91: index -= hist_length;
! 92: fprintf(fp,"%s\n",hist_table[index]);
! 93: }
! 94: fclose(fp);
! 95: }
! 96:
! 97: char *next_hist(void) {
! 98: if ( !hist_traverse || hist_traverse_index == hist_current )
! 99: return 0;
! 100: else {
! 101: hist_traverse_index = (hist_traverse_index+1) % hist_length;
! 102: return hist_table[hist_traverse_index];
! 103: }
! 104: }
! 105:
! 106: char *prev_hist(void) {
! 107: if ( !hist_traverse ) {
! 108: if ( hist_current >= 0 ) {
! 109: hist_traverse = 1;
! 110: hist_traverse_index = hist_current;
! 111: return hist_table[hist_traverse_index];
! 112: } else
! 113: return 0;
! 114: } else {
! 115: hist_traverse_index--;
! 116: if ( hist_traverse_index < 0 )
! 117: if ( hist_full )
! 118: hist_traverse_index += hist_length;
! 119: else
! 120: hist_traverse_index = 0;
! 121: return hist_table[hist_traverse_index];
! 122: }
! 123: }
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