mirror of
git://git.suckless.org/sbase
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234 lines
4.3 KiB
C
234 lines
4.3 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <ctype.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "text.h"
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#include "util.h"
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struct keydef {
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unsigned start_column;
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unsigned end_column;
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unsigned start_char;
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unsigned end_char;
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};
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struct kdlist {
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struct keydef keydef;
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struct kdlist *next;
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};
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static struct kdlist *head = NULL;
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static struct kdlist *curr = NULL;
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static void addkeydef(char *);
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static void freelist(void);
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static int linecmp(const char **, const char **);
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static char *next_nonblank(char *);
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static char *next_blank(char *);
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static int parse_keydef(struct keydef *, char *);
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static char *skip_columns(char *, size_t);
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static char *columns(char *, const struct keydef *);
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static bool rflag = false;
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static bool uflag = false;
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static bool nflag = false;
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static void
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usage(void)
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{
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enprintf(2, "usage: %s [-nru] [-k def]... [file...]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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long i;
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FILE *fp;
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struct linebuf linebuf = EMPTY_LINEBUF;
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ARGBEGIN {
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case 'n':
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nflag = true;
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break;
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case 'r':
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rflag = true;
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break;
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case 'u':
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uflag = true;
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break;
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case 'k':
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addkeydef(EARGF(usage()));
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break;
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default:
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usage();
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} ARGEND;
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addkeydef("1");
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if(argc == 0) {
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getlines(stdin, &linebuf);
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} else for(; argc > 0; argc--, argv++) {
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if(!(fp = fopen(argv[0], "r"))) {
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enprintf(2, "fopen %s:", argv[0]);
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continue;
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}
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getlines(fp, &linebuf);
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fclose(fp);
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}
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qsort(linebuf.lines, linebuf.nlines, sizeof *linebuf.lines,
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(int (*)(const void *, const void *))linecmp);
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for(i = 0; i < linebuf.nlines; i++) {
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if(!uflag || i == 0 || linecmp((const char **)&linebuf.lines[i],
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(const char **)&linebuf.lines[i-1])) {
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fputs(linebuf.lines[i], stdout);
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}
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}
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freelist();
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return EXIT_SUCCESS;
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}
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static void
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addkeydef(char *def)
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{
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struct kdlist *node;
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node = malloc(sizeof(*node));
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if(!node)
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enprintf(2, "malloc:");
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if(!head)
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head = node;
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if(parse_keydef(&node->keydef, def))
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enprintf(2, "parse_keydef:");
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if(curr)
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curr->next = node;
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node->next = NULL;
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curr = node;
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}
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static void
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freelist(void)
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{
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struct kdlist *node;
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struct kdlist *tmp;
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for(node = head; node; node = tmp) {
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tmp = node->next;
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free(node);
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}
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}
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static int
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linecmp(const char **a, const char **b)
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{
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char *s1, *s2;
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int res = 0;
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struct kdlist *node;
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for(node = head; node && res == 0; node = node->next) {
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s1 = columns((char *)*a, &node->keydef);
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s2 = columns((char *)*b, &node->keydef);
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/* don't consider modifiers if it's the default key
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* definition that was implicitly added */
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/* if -u is given, don't use default */
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if(uflag && !(node == head) && !node->next)
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res = 0;
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else if(!(node == head) && !node->next)
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res = strcmp(s1, s2);
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else if(nflag)
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res = strtoul(s1, 0, 10) - strtoul(s2, 0, 10);
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else
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res = strcmp(s1, s2);
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free(s1);
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free(s2);
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}
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return rflag ? -res : res;
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}
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static int
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parse_keydef(struct keydef *kd, char *s)
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{
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char *rest = s;
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kd->start_column = 1;
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kd->start_char = 1;
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/* 0 means end of line */
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kd->end_column = 0;
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kd->end_char = 0;
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kd->start_column = strtoul(rest, &rest, 10);
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if(!kd->start_column)
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enprintf(2, "starting column cannot be 0\n");
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if(*rest == '.')
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kd->start_char = strtoul(rest+1, &rest, 10);
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if(*rest == ',') {
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kd->end_column = strtoul(rest+1, &rest, 10);
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if(kd->end_column < kd->start_column)
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enprintf(2, ",%u is too small\n", kd->end_column);
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}
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if(*rest == '.')
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kd->end_char = strtoul(rest+1, &rest, 10);
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if(*rest != '\0')
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return -1;
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return 0;
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}
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static char *
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next_nonblank(char *s)
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{
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while(*s && isblank(*s))
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s++;
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return s;
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}
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static char *
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next_blank(char *s)
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{
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while(*s && !isblank(*s))
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s++;
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return s;
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}
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static char *
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skip_columns(char *s, size_t n)
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{
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size_t i;
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for(i = 0; i < n; i++) {
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if(i != 0)
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s = next_blank(s);
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s = next_nonblank(s);
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}
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return s;
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}
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static char *
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columns(char *line, const struct keydef *kd)
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{
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char *start, *end;
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char *res;
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start = skip_columns(line, kd->start_column);
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start += MIN(kd->start_char, next_blank(start) - start) - 1;
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if(kd->end_column) {
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end = skip_columns(line, kd->end_column);
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if(kd->end_char)
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end += MIN(kd->end_char, next_blank(end) - end);
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else
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end = next_blank(end);
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} else {
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end = line + strlen(line);
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}
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if((res = strndup(start, end - start)) == NULL)
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enprintf(2, "strndup:");
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return res;
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}
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