FreeCalypso > hg > freecalypso-hwlab
view simtool/hexread.c @ 150:54e33e9238b6
fc-simtool: harmonize hex string code with fc-uicc-tool
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 07 Feb 2021 00:06:50 +0000 |
parents | 4aaf722ab933 |
children |
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/* * This module contains the function for reading hex files, * to be used in the implementation of manual write commands. */ #include <sys/types.h> #include <ctype.h> #include <string.h> #include <strings.h> #include <stdio.h> #include <stdlib.h> read_hex_data_file(filename, databuf) char *filename; u_char *databuf; { FILE *inf; unsigned count; int c, c2; inf = fopen(filename, "r"); if (!inf) { perror(filename); return(-1); } for (count = 0; ; count++) { do c = getc(inf); while (isspace(c)); if (c < 0) break; if (!isxdigit(c)) { inv_input: fprintf(stderr, "%s: invalid hex file input\n", filename); fclose(inf); return(-1); } c2 = getc(inf); if (!isxdigit(c2)) goto inv_input; if (count >= 255) { fprintf(stderr, "%s: hex input data is too long\n", filename); fclose(inf); return(-1); } databuf[count] = (decode_hex_digit(c) << 4) | decode_hex_digit(c2); } fclose(inf); if (!count) { fprintf(stderr, "%s: no hex data input found\n", filename); return(-1); } return(count); }