diff options
Diffstat (limited to 'thirdparty/mhook/disasm-lib/misc.c')
| -rw-r--r-- | thirdparty/mhook/disasm-lib/misc.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/thirdparty/mhook/disasm-lib/misc.c b/thirdparty/mhook/disasm-lib/misc.c new file mode 100644 index 00000000..c5b0ac61 --- /dev/null +++ b/thirdparty/mhook/disasm-lib/misc.c @@ -0,0 +1,185 @@ +// Copyright (C) 2002, Matt Conover (mconover@gmail.com) +#include "misc.h" + +BOOL IsHexChar(BYTE ch) +{ + switch (ch) + { + case '0': case '1': case '2': case '3': + case '4': case '5': case '6': case '7': + case '8': case '9': + case 'A': case 'a': case 'B': case 'b': + case 'C': case 'c': case 'D': case 'd': + case 'E': case 'e': case 'F': case 'f': + return TRUE; + default: + return FALSE; + } +} + +// NOTE: caller must free the buffer returned +BYTE *HexToBinary(char *Input, DWORD InputLength, DWORD *OutputLength) +{ + DWORD i, j, ByteCount = 0; + char temp_byte[3]; + BYTE *p, *ByteString = NULL; + + if (!InputLength || !OutputLength) return NULL; + else *OutputLength = 0; + + while (*Input && isspace(*Input)) { Input++; InputLength--; } + if (!*Input) return NULL; + if (Input[0] == '\"') { Input++; InputLength--; } + p = (BYTE *)strchr(Input, '\"'); + if (p) InputLength--; + + if (InputLength > 2 && Input[2] == ' ') // assume spaces + { + for (i = 0; i < InputLength; i += 3) + { + while (i < InputLength && isspace(Input[i])) i++; // skip over extra space, \r, and \n + if (i >= InputLength) break; + + if (!IsHexChar(Input[i])) + { + //fprintf(stderr, "ERROR: invalid hex character at offset %lu (0x%04x)\n", i, i); + goto abort; + } + + if (i+1 >= InputLength || !Input[i+1]) + { + //fprintf(stderr, "ERROR: hex string terminates unexpectedly at offset %lu (0x%04x)\n", i+1, i+1); + goto abort; + } + + if (i+2 < InputLength && Input[i+2] && !isspace(Input[i+2])) + { + //fprintf(stderr, "ERROR: Hex string is malformed at offset %lu (0x%04x)\n", i, i); + //fprintf(stderr, "Found '%c' (0x%02x) instead of space\n", Input[i+2], Input[i+2]); + goto abort; + } + + ByteCount++; + } + + if (!ByteCount) + { + //fprintf(stderr, "Error: no input (byte count = 0)\n"); + goto abort; + } + + ByteString = malloc(ByteCount+1); + if (!ByteString) + { + //fprintf(stderr, "ERROR: failed to allocate %lu bytes\n", ByteCount); + goto abort; + } + + memset(ByteString, 0, ByteCount+1); + for (i = 0, j = 0; j < ByteCount; i += 3, j++) + { + while (isspace(Input[i])) i++; // skip over extra space, \r, and \n + temp_byte[0] = Input[i]; + temp_byte[1] = Input[i+1]; + temp_byte[2] = 0; + ByteString[j] = (BYTE)strtoul(temp_byte, NULL, 16); + } + } + else if (InputLength > 2 && Input[0] == '\\') + { + for (i = 0; i < InputLength; i += 2) + { + if (Input[i] != '\\' || (Input[i+1] != 'x' && Input[i+1] != '0')) + { + //fprintf(stderr, "ERROR: invalid hex character at offset %lu (0x%04x)\n", i, i); + goto abort; + } + i += 2; + + if (!IsHexChar(Input[i])) + { + //fprintf(stderr, "ERROR: invalid hex character at offset %lu (0x%04x)\n", i, i); + goto abort; + } + if (i+1 >= InputLength || !Input[i+1]) + { + //fprintf(stderr, "ERROR: hex string terminates unexpectedly at offset %lu (0x%04x)\n", i+1, i+1); + goto abort; + } + + ByteCount++; + } + + if (!ByteCount) + { + //fprintf(stderr, "Error: no input (byte count = 0)\n"); + goto abort; + } + + ByteString = malloc(ByteCount+1); + if (!ByteString) + { + //fprintf(stderr, "ERROR: failed to allocate %lu bytes\n", ByteCount); + goto abort; + } + + memset(ByteString, 0, ByteCount+1); + for (i = j = 0; j < ByteCount; i += 2, j++) + { + i += 2; + temp_byte[0] = Input[i]; + temp_byte[1] = Input[i+1]; + temp_byte[2] = 0; + ByteString[j] = (BYTE)strtoul(temp_byte, NULL, 16); + } + } + else // assume it is a hex string with no spaces with 2 bytes per character + { + for (i = 0; i < InputLength; i += 2) + { + if (!IsHexChar(Input[i])) + { + //fprintf(stderr, "ERROR: invalid hex character at offset %lu (0x%04x)\n", i, i); + goto abort; + } + if (i+1 >= InputLength || !Input[i+1]) + { + //fprintf(stderr, "ERROR: hex string terminates unexpectedly at offset %lu (0x%04x)\n", i+1, i+1); + goto abort; + } + + ByteCount++; + } + + if (!ByteCount) + { + //fprintf(stderr, "Error: no input (byte count = 0)\n"); + goto abort; + } + + ByteString = malloc(ByteCount+1); + if (!ByteString) + { + //fprintf(stderr, "ERROR: failed to allocate %lu bytes\n", ByteCount); + goto abort; + } + + memset(ByteString, 0, ByteCount+1); + for (i = 0, j = 0; j < ByteCount; i += 2, j++) + { + temp_byte[0] = Input[i]; + temp_byte[1] = Input[i+1]; + temp_byte[2] = 0; + ByteString[j] = (BYTE)strtoul(temp_byte, NULL, 16); + } + } + + *OutputLength = ByteCount; + return ByteString; + +abort: + if (OutputLength) *OutputLength = 0; + if (ByteString) free(ByteString); + return NULL; +} + |