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/*
* utils.c
*
* Utility stuff
*
* (c) 2008 Thomas White <taw27@cam.ac.uk>
*
* thrust3d - a silly game
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include <stdlib.h>
#include "utils.h"
void chomp(char *a) {
unsigned int i;
for ( i=0; i<strlen(a); i++ ) {
if ( a[i] == '\n' ) {
a[i] = '\0';
return;
}
}
}
/* Return non-zero if c is in delims */
static int assplode_isdelim(const char c, const char *delims) {
size_t i;
for ( i=0; i<strlen(delims); i++ ) {
if ( c == delims[i] ) return 1;
}
return 0;
}
static int assplode_extract(char ***pbits, int n, size_t n_captured, size_t start, const char *a) {
char **bits = *pbits;
bits = realloc(bits, sizeof(char *)*(n+1));
bits[n] = malloc(n_captured+1);
memcpy(bits[n], a+start, n_captured);
bits[n][n_captured] = '\0';
n++;
*pbits = bits;
return n;
}
/* Split the string 'a' using 'delims' as a zero-terminated list of deliminators.
* Store each segment in bits[0...n] where n is the number of segments and is the
* return value. pbits = &bits
* Each segment needs to be freed with free() when finished with.
* The array of bits also needs to be freed with free() when finished with, unless
* n=0 in which case bits==NULL
*/
int assplode(const char *a, const char *delims, char ***pbits, AssplodeFlag flags) {
size_t i, start, n_captured;
int n, last_was_delim;
char **bits;
n = 0;
i = 0;
n_captured = 0;
start = 0;
last_was_delim = 0;
bits = NULL;
while ( i < strlen(a) ) {
if ( assplode_isdelim(a[i], delims) ) {
if ( n_captured > 0 ) {
/* This is a deliminator after a sequence of non-deliminator chars */
n = assplode_extract(&bits, n, n_captured, start, a);
}
n_captured = 0;
if ( (flags & ASSPLODE_DUPS) && last_was_delim ) {
n = assplode_extract(&bits, n, 0, start, a);
}
last_was_delim = 1;
} else {
if ( n_captured == 0 ) {
/* No characters currently found, so this is the start */
start = i;
}
n_captured++;
last_was_delim = 0;
}
i++;
}
/* Left over characters at the end? */
if ( n_captured > 0 ) {
n = assplode_extract(&bits, n, n_captured, start, a);
}
*pbits = bits;
return n;
}
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