field-range-parser.c

Parse field ranges

  N     N'th field, counted from 1
  N-    from N'th field, to end of line
  N-M   from N'th to M'th (included) field
  -M    from first to M'th (included) field

Parsable string examples

Field 1, 2, 3 to 15, and everything above 35

1,2,3-15,35-

1 to 12

-12

All fields

`-`

API Example

#include "field-range-parser.h"

int main(int argc, const char **argv) {
  struct field_range fs;
  int i;
  int field;

  field_range_init(&fs, NULL);
  field_range_parse(&fs, "11-15-");

  field_range_is_set(&fs, 11); // field 11 is set
  !field_range_is_set(&fs, 10); // field 10 not set
  field_range_is_set(&fs, 532); // field 532 is set

  for (i = 0; i < fs.num_explicit_fields; ++i) {
    printf("field %d is set\n", fs.fields[i]);
  }

  printf("everything after %d is set\n", fs.all_from);

  field_range_free(&fs, NULL);

  return 0;
}

Installation

Install with clib

$ clib install jb55/field-range-parser.c

API

struct fp_err {
  int code;
  const char *message;
};

struct field_range {
  const struct fp_err * err;
  size_t err_loc;
  int num_explicit_fields;
  int all_from;
  int all_to;
  int *fields;
};

struct field_range *
field_range_init(struct field_range *fs, void* (*_realloc)(void*, size_t));

int
field_range_is_set(struct field_range *fs, int field);

void
field_range_free(struct field_range *fs, void (*_free)(void*));

int
field_range_parse(struct field_range *fs, const char *str);

License

The MIT License (MIT)

Copyright (c) 2015 William Casarin

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.