diff options
Diffstat (limited to 'src/gf_method.c')
| -rw-r--r-- | src/gf_method.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/gf_method.c b/src/gf_method.c new file mode 100644 index 0000000..36ec3c4 --- /dev/null +++ b/src/gf_method.c @@ -0,0 +1,186 @@ +/* + * GF-Complete: A Comprehensive Open Source Library for Galois Field Arithmetic + * James S. Plank, Ethan L. Miller, Kevin M. Greenan, + * Benjamin A. Arnold, John A. Burnum, Adam W. Disney, Allen C. McBride. + * + * gf_method.c + * + * Parses argv to figure out the mult_type and arguments. Returns the gf. + */ + +#include <stdio.h> +#include <stdint.h> +#include <string.h> +#include <stdlib.h> +#include <time.h> + +#include "gf_complete.h" +#include "gf_int.h" +#include "gf_method.h" + +int create_gf_from_argv(gf_t *gf, int w, int argc, char **argv, int starting) +{ + int mult_type, divide_type, region_type; + int arg1, arg2, subrg_size; + uint64_t prim_poly; + gf_t *base; + char *crt, *x, *y; + + mult_type = GF_MULT_DEFAULT; + region_type = GF_REGION_DEFAULT; + divide_type = GF_DIVIDE_DEFAULT; + prim_poly = 0; + base = NULL; + arg1 = 0; + arg2 = 0; + while (1) { + if (argc > starting) { + if (strcmp(argv[starting], "-m") == 0) { + starting++; + if (mult_type != GF_MULT_DEFAULT) { + if (base != NULL) gf_free(base, 1); + _gf_errno = GF_E_TWOMULT; + return 0; + } + if (strcmp(argv[starting], "SHIFT") == 0) { + mult_type = GF_MULT_SHIFT; + starting++; + } else if (strcmp(argv[starting], "CARRY_FREE") == 0) { + mult_type = GF_MULT_CARRY_FREE; + starting++; + } else if (strcmp(argv[starting], "GROUP") == 0) { + mult_type = GF_MULT_GROUP; + if (argc < starting + 3) { + _gf_errno = GF_E_GROUPAR; + return 0; + } + if (sscanf(argv[starting+1], "%d", &arg1) == 0 || + sscanf(argv[starting+2], "%d", &arg2) == 0) { + _gf_errno = GF_E_GROUPNU; + return 0; + } + starting += 3; + } else if (strcmp(argv[starting], "BYTWO_p") == 0) { + mult_type = GF_MULT_BYTWO_p; + starting++; + } else if (strcmp(argv[starting], "BYTWO_b") == 0) { + mult_type = GF_MULT_BYTWO_b; + starting++; + } else if (strcmp(argv[starting], "TABLE") == 0) { + mult_type = GF_MULT_TABLE; + starting++; + } else if (strcmp(argv[starting], "LOG") == 0) { + mult_type = GF_MULT_LOG_TABLE; + starting++; + } else if (strcmp(argv[starting], "LOG_ZERO") == 0) { + mult_type = GF_MULT_LOG_ZERO; + starting++; + } else if (strcmp(argv[starting], "LOG_ZERO_EXT") == 0) { + mult_type = GF_MULT_LOG_ZERO_EXT; + starting++; + } else if (strcmp(argv[starting], "SPLIT") == 0) { + mult_type = GF_MULT_SPLIT_TABLE; + if (argc < starting + 3) { + _gf_errno = GF_E_SPLITAR; + return 0; + } + if (sscanf(argv[starting+1], "%d", &arg1) == 0 || + sscanf(argv[starting+2], "%d", &arg2) == 0) { + _gf_errno = GF_E_SPLITNU; + return 0; + } + starting += 3; + } else if (strcmp(argv[starting], "COMPOSITE") == 0) { + mult_type = GF_MULT_COMPOSITE; + if (argc < starting + 2) { _gf_errno = GF_E_FEWARGS; return 0; } + if (sscanf(argv[starting+1], "%d", &arg1) == 0) { + _gf_errno = GF_E_COMP_A2; + return 0; + } + starting += 2; + base = (gf_t *) malloc(sizeof(gf_t)); + starting = create_gf_from_argv(base, w/arg1, argc, argv, starting); + if (starting == 0) { + free(base); + return 0; + } + } else { + if (base != NULL) gf_free(base, 1); + _gf_errno = GF_E_UNKNOWN; + return 0; + } + } else if (strcmp(argv[starting], "-r") == 0) { + starting++; + if (strcmp(argv[starting], "DOUBLE") == 0) { + region_type |= GF_REGION_DOUBLE_TABLE; + starting++; + } else if (strcmp(argv[starting], "QUAD") == 0) { + region_type |= GF_REGION_QUAD_TABLE; + starting++; + } else if (strcmp(argv[starting], "LAZY") == 0) { + region_type |= GF_REGION_LAZY; + starting++; + } else if (strcmp(argv[starting], "SSE") == 0) { + region_type |= GF_REGION_SSE; + starting++; + } else if (strcmp(argv[starting], "NOSSE") == 0) { + region_type |= GF_REGION_NOSSE; + starting++; + } else if (strcmp(argv[starting], "CAUCHY") == 0) { + region_type |= GF_REGION_CAUCHY; + starting++; + } else if (strcmp(argv[starting], "ALTMAP") == 0) { + region_type |= GF_REGION_ALTMAP; + starting++; + } else { + if (base != NULL) gf_free(base, 1); + _gf_errno = GF_E_UNK_REG; + return 0; + } + } else if (strcmp(argv[starting], "-p") == 0) { + starting++; + if (sscanf(argv[starting], "%llx", (long long unsigned int *)(&prim_poly)) == 0) { + if (base != NULL) gf_free(base, 1); + _gf_errno = GF_E_POLYSPC; + return 0; + } + starting++; + } else if (strcmp(argv[starting], "-d") == 0) { + starting++; + if (divide_type != GF_DIVIDE_DEFAULT) { + if (base != NULL) gf_free(base, 1); + _gf_errno = GF_E_TWO_DIV; + return 0; + } else if (strcmp(argv[starting], "EUCLID") == 0) { + divide_type = GF_DIVIDE_EUCLID; + starting++; + } else if (strcmp(argv[starting], "MATRIX") == 0) { + divide_type = GF_DIVIDE_MATRIX; + starting++; + } else { + _gf_errno = GF_E_UNK_DIV; + return 0; + } + } else if (strcmp(argv[starting], "-") == 0) { + /* + printf("Scratch size: %d\n", gf_scratch_size(w, + mult_type, region_type, divide_type, arg1, arg2)); + */ + if (gf_init_hard(gf, w, mult_type, region_type, divide_type, + prim_poly, arg1, arg2, base, NULL) == 0) { + if (base != NULL) gf_free(base, 1); + return 0; + } else + return starting + 1; + } else { + if (base != NULL) gf_free(base, 1); + _gf_errno = GF_E_UNKFLAG; + return 0; + } + } else { + if (base != NULL) gf_free(base, 1); + _gf_errno = GF_E_FEWARGS; + return 0; + } + } +} |