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tst-split.c
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tst-split.c
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/*
* tst-split - split a line into CSV separated fields
*
* Copyright (c) 2015, Phil Maker
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <string.h>
#include "tst-split.h"
// split a string
static char *fields[100];
static int nfields;
int split_csv(char *s) {
nfields = 0;
fields[0] = s;
for(;;) {
// printf("split_csv processing %s\n", s);
if(*s == '\0') { // end of string
return ++nfields;
} else if(*s == ',') { // new field
*s = '\0'; // terminate old one
fields[++nfields] = ++s;
} else { // keep moving
s++;
}
}
}
char* field(int n) {
return fields[n];
}
void print_fields() {
int i;
for(i = 0; i != nfields; i++) {
printf("#%d = %s\n", i, fields[i]);
}
}
#ifdef TEST
int main() {
char* tests[] = {
"hello",
"field1,field2",
",f",
"",
",,,,",
NULL
};
int i;
for(i = 0; tests[i] != NULL; i++) {
printf("split('%s') -> ", tests[i]);
// you need the strdup since we modify the string in place
int nf = split_csv(strdup(tests[i]));
printf("%d fields\n", nf);
print_fields();
}
}
#endif