FreeCalypso > hg > freecalypso-tools

annotate ringtools/fc-pwt-comp.c @ 1000:39a6090a052a

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doc/How-flash-really-works: article written
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 09 Dec 2023 09:08:19 +0000
parents 16e259bff02b
children
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dfd98dd46068 ringtools: fc-pwt-comp utility written
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This program compiles a FreeCalypso PWT melody from our ASCII source
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3 * format into the compact binary format that will be uploaded into
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4 * FC device FFS for use by our BUZM melody player engine.
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5 *
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6 * The binary format going into FFS consists of 4-byte records;
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7 * each record has the following format:
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8 *
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9 * 1 byte: PWT note code [0,47] going directly into hw register
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10 * 1 byte: tone volume in [1,64] range, or 0 means rest period
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11 * 2 bytes LE: tone or rest duration in TDMA frames
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12 */
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13
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14 #include <stdio.h>
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15 #include <stdlib.h>
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16 #include <ctype.h>
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17 #include <string.h>
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18 #include <strings.h>
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19
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20 static struct pwt_note {
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21 char *name;
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22 int code;
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23 } pwt_notes_table[] = {
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24 {"f4", 47}, /* 349 Hz */
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25 {"fs4", 43}, /* 370 Hz */
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26 {"g4", 39}, /* 392 Hz */
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27 {"gs4", 35}, /* 415 Hz */
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28 {"a4", 31}, /* 440 Hz */
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29 {"as4", 27}, /* 466 Hz */
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30 {"b4", 23}, /* 494 Hz */
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31 {"c5", 19}, /* 523 Hz */
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32 {"cs5", 15}, /* 554 Hz */
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33 {"d5", 11}, /* 587 Hz */
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34 {"ds5", 7}, /* 622 Hz */
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35 {"e5", 3}, /* 659 Hz */
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36 {"f5", 46}, /* 698 Hz */
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37 {"fs5", 42}, /* 740 Hz */
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38 {"g5", 38}, /* 784 Hz */
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39 {"gs5", 34}, /* 831 Hz */
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40 {"a5", 30}, /* 880 Hz */
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41 {"as5", 26}, /* 932 Hz */
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42 {"b5", 22}, /* 988 Hz */
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43 {"c6", 18}, /* 1047 Hz */
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44 {"cs6", 14}, /* 1109 Hz */
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45 {"d6", 10}, /* 1175 Hz */
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46 {"ds6", 6}, /* 1245 Hz */
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47 {"e6", 2}, /* 1319 Hz */
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48 {"f6", 45}, /* 1397 Hz */
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49 {"fs6", 41}, /* 1480 Hz */
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50 {"g6", 37}, /* 1568 Hz */
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51 {"gs6", 33}, /* 1661 Hz */
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52 {"a6", 29}, /* 1760 Hz */
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53 {"as6", 25}, /* 1865 Hz */
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54 {"b6", 21}, /* 1976 Hz */
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55 {"c7", 17}, /* 2093 Hz */
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56 {"cs7", 13}, /* 2217 Hz */
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57 {"d7", 9}, /* 2349 Hz */
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58 {"ds7", 5}, /* 2489 Hz */
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59 {"e7", 1}, /* 2637 Hz */
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60 {"f7", 44}, /* 2794 Hz */
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61 {"fs7", 40}, /* 2960 Hz */
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62 {"g7", 36}, /* 3136 Hz */
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63 {"gs7", 32}, /* 3322 Hz */
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64 {"a7", 28}, /* 3520 Hz */
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65 {"as7", 24}, /* 3729 Hz */
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66 {"b7", 20}, /* 3951 Hz */
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67 {"c8", 16}, /* 4186 Hz */
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68 {"cs8", 12}, /* 4435 Hz */
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69 {"d8", 8}, /* 4699 Hz */
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70 {"ds8", 4}, /* 4978 Hz */
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71 {"e8", 0}, /* 5274 Hz */
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72 /* table search terminator */
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73 {0, -1}
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74 };
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75
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76 char *infname, *outfname;
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77 FILE *inf, *outf;
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78 char linebuf[256], *fields[3];
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79 int lineno, nfields;
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80
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81 parse_line_into_fields()
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82 {
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83 char *cp;
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84
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85 cp = index(linebuf, '\n');
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86 if (!cp) {
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87 fprintf(stderr, "%s line %d: missing newline\n",
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88 infname, lineno);
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89 exit(1);
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90 }
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91 cp = linebuf;
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92 nfields = 0;
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93 for (;;) {
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94 while (isspace(*cp))
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95 cp++;
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96 if (*cp == '\0' || *cp == '#')
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97 break;
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98 if (nfields >= 3) {
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99 fprintf(stderr, "%s line %d: too many fields\n",
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100 infname, lineno);
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101 exit(1);
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102 }
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103 fields[nfields++] = cp;
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104 while (*cp && !isspace(*cp))
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105 cp++;
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106 if (*cp)
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107 *cp++ = '\0';
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108 }
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109 }
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110
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111 emit_record(freq, volume, duration)
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112 unsigned freq, volume, duration;
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113 {
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114 putc(freq, outf);
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115 putc(volume, outf);
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116 putc(duration & 0xFF, outf);
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117 putc(duration >> 8, outf);
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118 }
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119
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120 process_tone_entry()
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121 {
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122 struct pwt_note *tp;
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123 unsigned note_vol, duration;
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124
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125 for (tp = pwt_notes_table; tp->name; tp++)
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126 if (!strcmp(tp->name, fields[0]))
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127 break;
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128 if (tp->code < 0) {
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129 fprintf(stderr, "%s line %d: invalid note name\n",
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130 infname, lineno);
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131 exit(1);
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132 }
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133 note_vol = strtoul(fields[1], 0, 0);
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134 if (note_vol < 1 || note_vol > 64) {
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135 fprintf(stderr, "%s line %d: invalid note volume\n",
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136 infname, lineno);
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137 exit(1);
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138 }
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139 duration = strtoul(fields[2], 0, 0);
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140 if (duration < 1 || duration > 0xFFFF) {
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141 fprintf(stderr,
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142 "%s line %d: the duration number is out of range\n",
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143 infname, lineno);
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144 exit(1);
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145 }
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146 emit_record(tp->code, note_vol, duration);
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147 }
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148
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149 process_rest_entry()
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150 {
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151 unsigned duration;
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152
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153 duration = strtoul(fields[1], 0, 0);
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154 if (duration < 1 || duration > 0xFFFF) {
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155 fprintf(stderr,
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156 "%s line %d: the duration number is out of range\n",
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157 infname, lineno);
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158 exit(1);
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159 }
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160 emit_record(0, 0, duration);
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161 }
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162
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163 main(argc, argv)
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164 char **argv;
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165 {
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166 int nonempty;
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167
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168 if (argc != 3) {
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169 fprintf(stderr, "usage: %s src-file bin-file\n", argv[0]);
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170 exit(1);
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171 }
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172 if (strcmp(argv[1], "-")) {
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173 infname = argv[1];
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174 inf = fopen(infname, "r");
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175 if (!inf) {
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176 perror(infname);
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177 exit(1);
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178 }
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179 } else {
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180 infname = "stdin";
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181 inf = stdin;
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182 }
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183 outfname = argv[2];
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184 outf = fopen(outfname, "w");
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185 if (!outf) {
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186 perror(outfname);
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187 exit(1);
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188 }
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189
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190 nonempty = 0;
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191 for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++) {
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192 parse_line_into_fields();
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193 if (!nfields)
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194 continue;
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195 if (nfields == 3)
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196 process_tone_entry();
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197 else if (nfields == 2 && !strcmp(fields[0], "rest"))
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198 process_rest_entry();
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199 else {
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200 fprintf(stderr, "%s line %d: invalid syntax\n",
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201 infname, lineno);
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202 exit(1);
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203 }
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204 nonempty = 1;
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205 }
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206 if (nonempty)
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207 exit(0);
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208 else {
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209 fprintf(stderr, "error: %s is empty\n", infname);
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210 exit(1);
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211 }
867
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212 }