1 | /* $RCSfile: util.c,v $$Revision: 1.1.1.3 $$Date: 2000-04-07 20:48:00 $ |
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2 | * |
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3 | * Copyright (c) 1991-1997, Larry Wall |
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4 | * |
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5 | * You may distribute under the terms of either the GNU General Public |
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6 | * License or the Artistic License, as specified in the README file. |
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7 | * |
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8 | * $Log: not supported by cvs2svn $ |
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9 | */ |
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10 | |
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11 | #include "EXTERN.h" |
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12 | #include "a2p.h" |
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13 | #include "INTERN.h" |
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14 | #include "util.h" |
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15 | |
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16 | #include <stdarg.h> |
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17 | #define FLUSH |
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18 | |
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19 | static char nomem[] = "Out of memory!\n"; |
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20 | |
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21 | /* paranoid version of malloc */ |
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22 | |
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23 | |
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24 | Malloc_t |
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25 | safemalloc(MEM_SIZE size) |
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26 | { |
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27 | Malloc_t ptr; |
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28 | |
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29 | /* malloc(0) is NASTY on some systems */ |
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30 | ptr = malloc(size ? size : 1); |
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31 | #ifdef DEBUGGING |
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32 | if (debug & 128) |
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33 | fprintf(stderr,"0x%lx: (%05d) malloc %ld bytes\n",(unsigned long)ptr, |
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34 | an++,(long)size); |
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35 | #endif |
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36 | if (ptr != Nullch) |
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37 | return ptr; |
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38 | else { |
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39 | fputs(nomem,stdout) FLUSH; |
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40 | exit(1); |
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41 | } |
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42 | /*NOTREACHED*/ |
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43 | return 0; |
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44 | } |
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45 | |
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46 | /* paranoid version of realloc */ |
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47 | |
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48 | Malloc_t |
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49 | saferealloc(Malloc_t where, MEM_SIZE size) |
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50 | { |
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51 | Malloc_t ptr; |
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52 | |
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53 | /* realloc(0) is NASTY on some systems */ |
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54 | ptr = realloc(where, size ? size : 1); |
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55 | #ifdef DEBUGGING |
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56 | if (debug & 128) { |
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57 | fprintf(stderr,"0x%lx: (%05d) rfree\n",(unsigned long)where,an++); |
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58 | fprintf(stderr,"0x%lx: (%05d) realloc %ld bytes\n",(unsigned long)ptr,an++,(long)size); |
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59 | } |
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60 | #endif |
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61 | if (ptr != Nullch) |
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62 | return ptr; |
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63 | else { |
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64 | fputs(nomem,stdout) FLUSH; |
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65 | exit(1); |
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66 | } |
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67 | /*NOTREACHED*/ |
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68 | return 0; |
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69 | } |
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70 | |
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71 | /* safe version of free */ |
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72 | |
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73 | Free_t |
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74 | safefree(Malloc_t where) |
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75 | { |
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76 | #ifdef DEBUGGING |
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77 | if (debug & 128) |
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78 | fprintf(stderr,"0x%lx: (%05d) free\n",(unsigned long)where,an++); |
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79 | #endif |
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80 | free(where); |
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81 | } |
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82 | |
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83 | /* safe version of string copy */ |
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84 | |
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85 | char * |
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86 | safecpy(char *to, register char *from, register int len) |
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87 | { |
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88 | register char *dest = to; |
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89 | |
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90 | if (from != Nullch) |
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91 | for (len--; len && (*dest++ = *from++); len--) ; |
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92 | *dest = '\0'; |
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93 | return to; |
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94 | } |
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95 | |
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96 | /* copy a string up to some (non-backslashed) delimiter, if any */ |
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97 | |
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98 | char * |
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99 | cpytill(register char *to, register char *from, register int delim) |
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100 | { |
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101 | for (; *from; from++,to++) { |
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102 | if (*from == '\\') { |
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103 | if (from[1] == delim) |
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104 | from++; |
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105 | else if (from[1] == '\\') |
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106 | *to++ = *from++; |
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107 | } |
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108 | else if (*from == delim) |
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109 | break; |
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110 | *to = *from; |
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111 | } |
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112 | *to = '\0'; |
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113 | return from; |
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114 | } |
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115 | |
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116 | |
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117 | char * |
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118 | cpy2(register char *to, register char *from, register int delim) |
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119 | { |
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120 | for (; *from; from++,to++) { |
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121 | if (*from == '\\') |
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122 | *to++ = *from++; |
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123 | else if (*from == '$') |
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124 | *to++ = '\\'; |
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125 | else if (*from == delim) |
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126 | break; |
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127 | *to = *from; |
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128 | } |
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129 | *to = '\0'; |
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130 | return from; |
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131 | } |
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132 | |
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133 | /* return ptr to little string in big string, NULL if not found */ |
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134 | |
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135 | char * |
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136 | instr(char *big, char *little) |
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137 | { |
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138 | register char *t, *s, *x; |
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139 | |
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140 | for (t = big; *t; t++) { |
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141 | for (x=t,s=little; *s; x++,s++) { |
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142 | if (!*x) |
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143 | return Nullch; |
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144 | if (*s != *x) |
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145 | break; |
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146 | } |
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147 | if (!*s) |
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148 | return t; |
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149 | } |
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150 | return Nullch; |
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151 | } |
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152 | |
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153 | /* copy a string to a safe spot */ |
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154 | |
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155 | char * |
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156 | savestr(char *str) |
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157 | { |
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158 | register char *newaddr = (char *) safemalloc((MEM_SIZE)(strlen(str)+1)); |
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159 | |
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160 | (void)strcpy(newaddr,str); |
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161 | return newaddr; |
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162 | } |
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163 | |
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164 | /* grow a static string to at least a certain length */ |
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165 | |
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166 | void |
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167 | growstr(char **strptr, int *curlen, int newlen) |
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168 | { |
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169 | if (newlen > *curlen) { /* need more room? */ |
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170 | if (*curlen) |
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171 | *strptr = (char *) saferealloc(*strptr,(MEM_SIZE)newlen); |
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172 | else |
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173 | *strptr = (char *) safemalloc((MEM_SIZE)newlen); |
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174 | *curlen = newlen; |
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175 | } |
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176 | } |
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177 | |
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178 | void |
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179 | croak(char *pat,...) |
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180 | { |
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181 | #if defined(HAS_VPRINTF) |
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182 | va_list args; |
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183 | |
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184 | va_start(args, pat); |
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185 | vfprintf(stderr,pat,args); |
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186 | #else |
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187 | fprintf(stderr,pat,a1,a2,a3,a4); |
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188 | #endif |
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189 | exit(1); |
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190 | } |
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191 | |
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192 | void |
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193 | fatal(char *pat,...) |
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194 | { |
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195 | #if defined(HAS_VPRINTF) |
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196 | va_list args; |
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197 | |
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198 | va_start(args, pat); |
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199 | vfprintf(stderr,pat,args); |
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200 | #else |
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201 | fprintf(stderr,pat,a1,a2,a3,a4); |
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202 | #endif |
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203 | exit(1); |
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204 | } |
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205 | |
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206 | #if defined(__APPLE_CC__) |
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207 | __private_extern__ /* warn() conflicts with libc */ |
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208 | #endif |
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209 | void |
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210 | warn(char *pat,...) |
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211 | { |
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212 | #if defined(HAS_VPRINTF) |
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213 | va_list args; |
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214 | |
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215 | va_start(args, pat); |
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216 | vfprintf(stderr,pat,args); |
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217 | #else |
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218 | fprintf(stderr,pat,a1,a2,a3,a4); |
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219 | #endif |
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220 | } |
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221 | |
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