commit 921b7b6113d66bbfe84fa3f6652a4e25c375253e
parent 96b7d3b9962f77398553b0784b044845dc82c8af
Author: anna <anna@brokenlove.online>
Date: Sat, 31 Aug 2024 19:01:37 +0200
move ba inside the project to keep it self contained
Diffstat:
| A | lib/ba/ba.c | | | 157 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
| A | lib/ba/ba.h | | | 26 | ++++++++++++++++++++++++++ |
2 files changed, 183 insertions(+), 0 deletions(-)
diff --git a/lib/ba/ba.c b/lib/ba/ba.c
@@ -0,0 +1,157 @@
+#include "ba.h"
+
+ba* ba_from_hex(char* hex)
+{
+ uint8_t* b_val;
+ size_t b_len;
+ ba* b;
+ int i;
+
+ b_len = strlen(hex);
+ if (b_len%2 != 0) {
+ fprintf(stderr, "can't create ba from string %.10s", hex);
+ if (b_len > 10)
+ fprintf(stderr, "...");
+ fprintf(stderr, " - odd number of hex digits\n");
+ return NULL;
+ }
+ b_len /= 2;
+
+ b_val = (uint8_t *) malloc(sizeof(uint8_t) * b_len);
+ b = (ba *) malloc(sizeof(ba));
+
+ if (b_val == NULL || b == NULL) {
+ fprintf(stderr, "can't create ba from string %.10s", hex);
+ if(b_len > 10)
+ fprintf(stderr, "...");
+ fprintf(stderr, " - malloc() error\n");
+ }
+
+ for (i = 0; i < b_len; i++) {
+ char tmp[3];
+ strncpy(tmp, hex + 2 * i, 2);
+ tmp[2] = '\0';
+ b_val[i] = strtol(tmp, NULL, 16);
+ }
+
+ b->len = b_len;
+ b->val = b_val;
+ return b;
+}
+
+ba* ba_from_string(char *s)
+{
+ uint8_t *b_val;
+ size_t b_len;
+ ba *b;
+ int i;
+
+ b_len = strlen(s);
+ b_val = (uint8_t *) malloc(sizeof(uint8_t) * b_len);
+
+ for (i = 0; s[i] != '\0'; i++)
+ b_val[i] = s[i];
+
+ b = (ba *) malloc(sizeof(ba));
+ b->len = b_len;
+ b->val = b_val;
+ return b;
+}
+
+ba* ba_from_hex_n(char* hex, unsigned int n)
+{
+ uint8_t* b_val;
+ size_t offset;
+ size_t b_len;
+ ba* b;
+ int o;
+
+ b_len = strlen(hex) * n;
+ offset = strlen(hex);
+ if (b_len%2 != 0) {
+ fprintf(stderr, "can't create ba from string %.10s", hex);
+ if (b_len > 10)
+ fprintf(stderr, "...");
+ fprintf(stderr, " - odd number of hex digits\n");
+ return NULL;
+ }
+ b_len /= 2;
+
+ b_val = (uint8_t*) malloc(sizeof(uint8_t) * b_len);
+ b = (ba*) malloc(sizeof(ba));
+
+ if (b_val == NULL || b == NULL) {
+ fprintf(stderr, "can't create ba from string %.10s", hex);
+ if(b_len > 10)
+ fprintf(stderr, "...");
+ fprintf(stderr, " - malloc() error\n");
+ }
+
+ for (o = 0; o < b_len * 2; o += offset) {
+ for (int i = 0; i < offset; i++) {
+ char tmp[3];
+ strncpy(tmp, hex + 2 * i, 2);
+ tmp[2] = '\0';
+ b_val[i+o/2] = strtol(tmp, NULL, 16);
+ }
+ }
+
+ b->len = b_len;
+ b->val = b_val;
+ return b;
+}
+
+void ba_fprint(ba* b, FILE* stream, int prec)
+{
+ int len;
+ int i;
+
+ len = (prec > b->len) || prec == 0 ? b->len : prec;
+ for (i = 0; i < len; i++)
+ fprintf(stream, "%02x", (b->val)[i]);
+}
+
+void ba_fprint_ascii(ba* b, FILE* stream, int prec)
+{
+ int len;
+ int i;
+
+ len = (prec > b->len) || prec == 0 ? b->len : prec;
+ for (i = 0; i < len; i++)
+ if (isprint((b->val)[i]))
+ fprintf(stream, "%c", (b->val)[i]);
+ else if (b->val[i] == 0x0a)
+ fprintf(stream, "\n");
+ else
+ fprintf(stream, "\\b%02x", (b->val)[i]);
+}
+
+void ba_xor(ba* a, ba* b)
+{
+ int len;
+ int i;
+
+ len = a->len < b->len ? a->len : b->len;
+ for (i = 0; i < len; i++)
+ (a->val)[i] = (a->val)[i] ^ (b->val)[i];
+}
+
+int ba_copy(ba *dst, ba *src)
+{
+ if (!dst)
+ return -1;
+ if (dst->val)
+ free(dst->val);
+ dst->len = src->len;
+ dst->val = (uint8_t *) malloc(sizeof(uint8_t) * src->len);
+ memcpy(dst->val, src->val, src->len);
+ return 0;
+
+}
+
+void ba_free(ba* b)
+{
+ free(b->val);
+ free(b);
+}
+
diff --git a/lib/ba/ba.h b/lib/ba/ba.h
@@ -0,0 +1,26 @@
+#ifndef BA_H
+#define BA_H
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <ctype.h>
+
+/* primitive variable length byte array to simplify working with hex strings */
+
+typedef struct {
+ size_t len;
+ uint8_t *val;
+} ba;
+
+ba* ba_from_hex(char *hex);
+ba* ba_from_hex_n(char *hex, unsigned int n);
+ba* ba_from_string(char *s);
+void ba_fprint(ba *b, FILE *stream, int prec);
+void ba_fprint_ascii(ba *b, FILE *stream, int prec);
+void ba_xor(ba *a, ba *b);
+int ba_copy(ba *dst, ba *src);
+void ba_free(ba *b);
+
+#endif
