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87
src/utils.c
87
src/utils.c
@ -1,14 +1,51 @@
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#include "utils.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 <math.h>
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#include <float.h>
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#include "utils.h"
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char *find_replace(char *str, char *orig, char *rep)
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{
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static char buffer[4096];
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char *p;
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if(!(p = strstr(str, orig))) // Is 'orig' even in 'str'?
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return str;
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strncpy(buffer, str, p-str); // Copy characters from 'str' start to 'orig' st$
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buffer[p-str] = '\0';
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sprintf(buffer+(p-str), "%s%s", rep, p+strlen(orig));
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return buffer;
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}
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float sec(clock_t clocks)
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{
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return (float)clocks/CLOCKS_PER_SEC;
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}
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void top_k(float *a, int n, int k, int *index)
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{
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int i,j;
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float thresh = FLT_MAX;
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for(i = 0; i < k; ++i){
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float max = -FLT_MAX;
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int max_i = -1;
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for(j = 0; j < n; ++j){
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float val = a[j];
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if(val > max && val < thresh){
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max = val;
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max_i = j;
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}
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}
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index[i] = max_i;
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thresh = max;
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}
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}
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void error(char *s)
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{
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fprintf(stderr, "Error: %s\n", s);
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@ -79,7 +116,7 @@ char *fgetl(FILE *fp)
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}
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int curr = strlen(line);
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while(line[curr-1]!='\n'){
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size *= 2;
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line = realloc(line, size*sizeof(char));
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@ -121,34 +158,34 @@ list *parse_csv_line(char *line)
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int count_fields(char *line)
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{
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int count = 0;
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int done = 0;
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int count = 0;
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int done = 0;
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char *c;
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for(c = line; !done; ++c){
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done = (*c == '\0');
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if(*c == ',' || done) ++count;
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}
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return count;
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for(c = line; !done; ++c){
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done = (*c == '\0');
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if(*c == ',' || done) ++count;
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}
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return count;
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}
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float *parse_fields(char *line, int n)
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{
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float *field = calloc(n, sizeof(float));
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char *c, *p, *end;
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int count = 0;
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int done = 0;
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for(c = line, p = line; !done; ++c){
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done = (*c == '\0');
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if(*c == ',' || done){
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*c = '\0';
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field[count] = strtod(p, &end);
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if(p == c) field[count] = nan("");
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if(end != c && (end != c-1 || *end != '\r')) field[count] = nan(""); //DOS file formats!
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p = c+1;
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++count;
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}
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}
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return field;
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float *field = calloc(n, sizeof(float));
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char *c, *p, *end;
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int count = 0;
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int done = 0;
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for(c = line, p = line; !done; ++c){
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done = (*c == '\0');
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if(*c == ',' || done){
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*c = '\0';
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field[count] = strtod(p, &end);
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if(p == c) field[count] = nan("");
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if(end != c && (end != c-1 || *end != '\r')) field[count] = nan(""); //DOS file formats!
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p = c+1;
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++count;
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}
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}
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return field;
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}
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float sum_array(float *a, int n)
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