diff options
Diffstat (limited to 'gawkapi.h')
| -rw-r--r-- | gawkapi.h | 29 |
1 files changed, 20 insertions, 9 deletions
@@ -119,16 +119,27 @@ typedef enum awk_bool { /* * If the input parser would like to specify the field positions in the input - * record, it may populate an array of awk_input_field_info_t structures - * to indicate the location of each field. The 0th array element contains - * the information about field $1, and the NFth element should set skip - * to a negative value. For both skip and len, the value should be in - * bytes, not (potentially multi-byte) characters. + * record, it may populate an awk_fieldwidth_info_t structure to indicate + * the location of each field. The use_chars boolean controls whether the + * field lengths are specified in terms of bytes or potentially multi-byte + * characters. Performance will be better if the values are supplied in + * terms of bytes. The fields[0].skip value indicates how many bytes (or + * characters to skip) before $1, and fields[0].len is the length of $1, etc. */ typedef struct { - int skip; /* # of bytes to skip before field starts */ - size_t len; /* # of bytes in field */ -} awk_input_field_info_t; + awk_bool_t use_chars; /* false ==> use bytes */ + size_t nf; + struct awk_field_info { + size_t skip; /* # to skip before field starts */ + size_t len; /* length of field */ + } fields[1]; /* actual dimension should be nf */ +} awk_fieldwidth_info_t; +/* + * This macro calculates the total struct size needed. This is useful when + * calling malloc or realloc. + */ +#define awk_fieldwidth_info_size(NF) (sizeof(awk_fieldwidth_info_t) + \ + (((NF)-1) * sizeof(struct awk_field_info))) /* The information about input files that input parsers need to know: */ typedef struct awk_input { @@ -174,7 +185,7 @@ typedef struct awk_input { */ int (*get_record)(char **out, struct awk_input *iobuf, int *errcode, char **rt_start, size_t *rt_len, - const awk_input_field_info_t **field_width); + const awk_fieldwidth_info_t **field_width); /* * No argument prototype on read_func to allow for older systems |