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-rw-r--r--lolcat.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/lolcat.c b/lolcat.c
new file mode 100644
index 0000000..f136ffd
--- /dev/null
+++ b/lolcat.c
@@ -0,0 +1,86 @@
+#include <stdio.h>
+#include <wchar.h>
+#include <ctype.h>
+#include <error.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define ARRAY_SIZE(foo) (sizeof(foo)/sizeof(foo[0]))
+char codes[] = {39,38,44,43,49,48,84,83,119,118,154,148,184,178,214,208,209,203,204,198,199,163,164,128,129,93,99,63,69,33};
+
+void usage(){
+ printf("Usage: lolcat [-h horizontal_speed] [-v vertical_speed] [--] [FILES...]\n");
+ exit(1);
+}
+
+int main(int argc, char **argv){
+ int c, cc=-1, i, l=0;
+ double freq_h = 0.23, freq_v = 0.1;
+
+ for(i=1;i<argc;i++){
+ char *endptr;
+ if(!strcmp(argv[i], "-h")){
+ if((++i)<argc){
+ fprintf(stderr, "parsing arg %s\n", argv[i]);
+ freq_h = strtod(argv[i], &endptr);
+ if(*endptr)
+ usage();
+ fprintf(stderr, "parsed -h: %lF\n", freq_h);
+ }else{
+ usage();
+ }
+ }else if(!strcmp(argv[i], "-v")){
+ if((++i)<argc){
+ freq_v = strtod(argv[i], &endptr);
+ if(*endptr)
+ usage();
+ fprintf(stderr, "parsed -v: %lF\n", freq_v);
+ }else{
+ usage();
+ }
+ }else{
+ if(!strcmp(argv[i], "--"))
+ i++;
+ fprintf(stderr, "ending option parsing\n");
+ break;
+ }
+ }
+
+ fprintf(stderr, "commencing input parsing...\n");
+ char **inputs = argv+i;
+ char **inputs_end = argv+argc;
+ if(inputs == inputs_end){
+ char *foo[] = {"-"};
+ inputs = foo;
+ inputs_end = inputs+1;
+ }
+
+ i=0;
+ for(char **filename=inputs; filename<inputs_end; filename++){
+ FILE *f = stdin;
+ fprintf(stderr, "opening input \"%s\"\n", *filename);
+ if(strcmp(*filename, "-"))
+ f = fopen(*filename, "r");
+
+ fprintf(stderr, "reading data...\n");
+
+ while((c = fgetwc(f)) > 0){
+ if(c == '\n'){
+ l++;
+ i = 0;
+ }else if(isprint(c)){
+ int ncc = (int)((i++)*freq_h + l*freq_v);
+ if(ncc != cc)
+ printf("\033[38;5;%hhum", codes[(cc = ncc) % ARRAY_SIZE(codes)]);
+ }
+ printf("%lc", c);
+ }
+ if(c != WEOF){
+ fprintf(stderr, "Error reading input file \"%s\": %s (%d)\n", *filename, strerror(errno), errno);
+ return 2;
+ }
+
+ fclose(f);
+ }
+}