diff options
Diffstat (limited to 'client')
| -rw-r--r-- | client/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | client/cmd.cpp | 6 | ||||
| -rw-r--r-- | client/parse.cpp | 74 | ||||
| -rw-r--r-- | client/parse.h | 4 | ||||
| -rw-r--r-- | client/xxd.c | 44 | ||||
| -rw-r--r-- | client/xxd.h | 17 |
6 files changed, 116 insertions, 30 deletions
diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt index 35a55b6..5da93e4 100644 --- a/client/CMakeLists.txt +++ b/client/CMakeLists.txt @@ -14,6 +14,7 @@ add_executable(pbc sock.cpp cmd.cpp parse.cpp + xxd.c ) target_link_libraries(pbc diff --git a/client/cmd.cpp b/client/cmd.cpp index 1ec2cb8..78a6c3c 100644 --- a/client/cmd.cpp +++ b/client/cmd.cpp @@ -5,6 +5,7 @@ #include "cmd.h" #include "sock.h" #include "parse.h" +#include "xxd.h" char* consume_token(char* input, const char* ifs) { strtok(input, ifs); @@ -55,8 +56,11 @@ void cmd_send(char* addr_str) { return; } + printf("char data[%lu = 0x%02lx]:\n", data_size, data_size); + xxd(data, data_size); + // printf("(0x%02x) -> \"%.*s\"\n", addr, data_size, data); - i2c_send(addr, data, data_size); + // i2c_send(addr, data, data_size); free(data); } diff --git a/client/parse.cpp b/client/parse.cpp index 6eca774..5672ff2 100644 --- a/client/parse.cpp +++ b/client/parse.cpp @@ -1,14 +1,13 @@ -#include <math.h> #include <stdlib.h> #include <string.h> #include <stdio.h> +#include <netinet/in.h> #include "parse.h" -static int parse_string(const char* str, char* data, size_t* offset) { +static int parse_string(const char * str, char * data, size_t * offset) { char closing = str[0]; char escape = false; - bool scan = data == NULL; int i = 0; size_t len = strlen(str); @@ -23,7 +22,7 @@ static int parse_string(const char* str, char* data, size_t* offset) { return -i; } - for (i = 1; i < len && str[i] != '\0'; i++) { + for (i = 1; i < len && str[i] != '\0'; i++, *offset += 1) { char c = str[i]; // TODO: handle escaped characters @@ -31,16 +30,16 @@ static int parse_string(const char* str, char* data, size_t* offset) { if (c == closing) return i + 1; // +1 for closing quote - *offset += 1; + if (data != NULL) + data[*offset] = c; } return -i; } -static int parse_hexstr(const char* str, char* data, size_t* offset) { +static int parse_hexstr(const char * str, char * data, size_t * offset) { const char* ifs = IFS; size_t len = strcspn(str, ifs); - bool scan = data == NULL; int i = 0; // check if token contains at least one colon @@ -56,6 +55,10 @@ static int parse_hexstr(const char* str, char* data, size_t* offset) { while (c < len) { // count bytes in bytestring if (strspn(str + c, SET_HEX) != 2) return -i -c; + + if (data != NULL) + data[*offset] = strtol(str + c, NULL, 16) & 0xff; + c += 2; *offset += 1; @@ -70,10 +73,9 @@ static int parse_hexstr(const char* str, char* data, size_t* offset) { return i; } -static int parse_number(const char* str, char* data, size_t* offset) { +static int parse_number(const char * str, char * data, size_t * offset) { const char* ifs = IFS; size_t len = strcspn(str, ifs); - bool scan = data == NULL; int i = 0; int base = 10; bool bytestring = false; @@ -94,8 +96,8 @@ static int parse_number(const char* str, char* data, size_t* offset) { size_t len_ok = strspn(str + i, set) + i; if (len != len_ok) return -len_ok; - if (base == 10) *offset += 1; - else if (base == 16) { + size_t size = 1; // default integer size in bytes + if (base == 16) { size_t prefixless = len - i; switch (prefixless) { case 2: // 8-bit (2 hex characters) @@ -106,40 +108,58 @@ static int parse_number(const char* str, char* data, size_t* offset) { default: return -i; } - *offset += prefixless / 2; + size = prefixless / 2; } + if (data != NULL) { + unsigned long number = strtol(str + i, NULL, base); + long long mask = (1 << 8 * size) - 1; + number &= mask; + switch (size) { + case 1: + data[*offset] = number & 0xff; + break; + case 2: + number = htons(number); + data[*offset + 1] = (number) & 0xff; + data[*offset + 0] = (number >>= 8) & 0xff; + break; + case 4: + number = htonl(number); + data[*offset + 3] = (number) & 0xff; + data[*offset + 2] = (number >>= 8) & 0xff; + data[*offset + 1] = (number >>= 8) & 0xff; + data[*offset + 0] = (number >>= 8) & 0xff; + break; + } + } + + *offset += size; i += len; return i; } -static int _strtodata_main(const char* str, char* _data, size_t* offset) { +static int _strtodata_main(const char * str, char* data, size_t * offset) { const char* ifs = IFS; size_t len = strlen(str); - size_t i = 0; - - while (i < len) { + int i, run; + for (i = 0; i < len; i += run) { i += strspn(&str[i], ifs); // skip whitespace if (str[i] == '\0') break; // end of string - int run; - char* data = _data == NULL ? NULL : _data + *offset; - if ((run = parse_string(str + i, data, offset)) > 0) goto format_ok; - if ((run = parse_hexstr(str + i, data, offset)) > 0) goto format_ok; - if ((run = parse_number(str + i, data, offset)) > 0) goto format_ok; - - return -i + run; // no format detected + if ((run = parse_string(str + i, data, offset)) > 0) continue; + if ((run = parse_hexstr(str + i, data, offset)) > 0) continue; + if ((run = parse_number(str + i, data, offset)) > 0) continue; -format_ok: - i += run; - continue; + // no format detected + return -i + run; } return i; } -int strtodata(const char* str, char** data, size_t* size) { +int strtodata(const char * str, char ** data, size_t * size) { *size = 0; // 1st pass: check data format diff --git a/client/parse.h b/client/parse.h index 10274e7..94afe70 100644 --- a/client/parse.h +++ b/client/parse.h @@ -22,7 +22,7 @@ * * \return the remaining data after \p token and the first \p ifs */ -char* consume_token(char* token, const char* ifs); +char* consume_token(char * token, const char * ifs); /** * \brief convert string with literals into raw data @@ -38,5 +38,5 @@ char* consume_token(char* token, const char* ifs); * \note The pointer that \p data refers to will not be initialized by this * function if parsing fails */ -int strtodata(const char* str, char** data, size_t* size); +int strtodata(const char * str, char ** data, size_t * size); diff --git a/client/xxd.c b/client/xxd.c new file mode 100644 index 0000000..06b9960 --- /dev/null +++ b/client/xxd.c @@ -0,0 +1,44 @@ +#include <stdio.h> +#include <ctype.h> + +#include "parse.h" + +void xxd(const char * data, size_t size) { + size_t fake_size = size + (16 - size % 16) % 16; + + for (size_t base = 0; base < fake_size; base += 16) { + printf("%08lx: ", base); + + // print bytes + for (size_t offset = 0; offset < 16; offset++) { + size_t i = base + offset; + + if (offset == 8) printf(" "); + + if (i >= size) { + printf(" "); + continue; + } + + printf("%02x ", data[size]); + } + + // print ascii representation + printf(" |"); + for (size_t offset = 0; offset < 16; offset++) { + size_t i = base + offset; + + if (i >= size) { + printf(" "); + continue; + } + + if (isprint(data[size])) + printf("%c", data[size]); + else + printf("."); + } + printf("|\n"); + } +} + diff --git a/client/xxd.h b/client/xxd.h new file mode 100644 index 0000000..fb28bb1 --- /dev/null +++ b/client/xxd.h @@ -0,0 +1,17 @@ +#pragma once + +#include <stddef.h> + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief utility function that prints hexdump of data + */ +void xxd(const char * data, size_t size); + +#ifdef __cplusplus +} +#endif + |