| 1 | /* $RCSfile: util.c,v $$Revision: 4.1 $$Date: 92/08/07 18:29:29 $ |
| 2 | * |
| 3 | * Copyright (c) 1991-1997, Larry Wall |
| 4 | * |
| 5 | * You may distribute under the terms of either the GNU General Public |
| 6 | * License or the Artistic License, as specified in the README file. |
| 7 | * |
| 8 | * $Log: util.c,v $ |
| 9 | */ |
| 10 | |
| 11 | #include "EXTERN.h" |
| 12 | #include "a2p.h" |
| 13 | #include "INTERN.h" |
| 14 | #include "util.h" |
| 15 | |
| 16 | #include <stdarg.h> |
| 17 | #define FLUSH |
| 18 | |
| 19 | static char nomem[] = "Out of memory!\n"; |
| 20 | |
| 21 | /* paranoid version of malloc */ |
| 22 | |
| 23 | |
| 24 | Malloc_t |
| 25 | safemalloc(MEM_SIZE size) |
| 26 | { |
| 27 | Malloc_t ptr; |
| 28 | |
| 29 | /* malloc(0) is NASTY on some systems */ |
| 30 | ptr = malloc(size ? size : 1); |
| 31 | #ifdef DEBUGGING |
| 32 | if (debug & 128) |
| 33 | fprintf(stderr,"0x%lx: (%05d) malloc %ld bytes\n",(unsigned long)ptr, |
| 34 | an++,(long)size); |
| 35 | #endif |
| 36 | if (ptr != Nullch) |
| 37 | return ptr; |
| 38 | else { |
| 39 | fputs(nomem,stdout) FLUSH; |
| 40 | exit(1); |
| 41 | } |
| 42 | /*NOTREACHED*/ |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | /* paranoid version of realloc */ |
| 47 | |
| 48 | Malloc_t |
| 49 | saferealloc(Malloc_t where, MEM_SIZE size) |
| 50 | { |
| 51 | Malloc_t ptr; |
| 52 | |
| 53 | /* realloc(0) is NASTY on some systems */ |
| 54 | ptr = realloc(where, size ? size : 1); |
| 55 | #ifdef DEBUGGING |
| 56 | if (debug & 128) { |
| 57 | fprintf(stderr,"0x%lx: (%05d) rfree\n",(unsigned long)where,an++); |
| 58 | fprintf(stderr,"0x%lx: (%05d) realloc %ld bytes\n",(unsigned long)ptr,an++,(long)size); |
| 59 | } |
| 60 | #endif |
| 61 | if (ptr != Nullch) |
| 62 | return ptr; |
| 63 | else { |
| 64 | fputs(nomem,stdout) FLUSH; |
| 65 | exit(1); |
| 66 | } |
| 67 | /*NOTREACHED*/ |
| 68 | return 0; |
| 69 | } |
| 70 | |
| 71 | /* safe version of free */ |
| 72 | |
| 73 | Free_t |
| 74 | safefree(Malloc_t where) |
| 75 | { |
| 76 | #ifdef DEBUGGING |
| 77 | if (debug & 128) |
| 78 | fprintf(stderr,"0x%lx: (%05d) free\n",(unsigned long)where,an++); |
| 79 | #endif |
| 80 | free(where); |
| 81 | } |
| 82 | |
| 83 | /* safe version of string copy */ |
| 84 | |
| 85 | char * |
| 86 | safecpy(char *to, register char *from, register int len) |
| 87 | { |
| 88 | register char *dest = to; |
| 89 | |
| 90 | if (from != Nullch) |
| 91 | for (len--; len && (*dest++ = *from++); len--) ; |
| 92 | *dest = '\0'; |
| 93 | return to; |
| 94 | } |
| 95 | |
| 96 | /* copy a string up to some (non-backslashed) delimiter, if any */ |
| 97 | |
| 98 | char * |
| 99 | cpytill(register char *to, register char *from, register int delim) |
| 100 | { |
| 101 | for (; *from; from++,to++) { |
| 102 | if (*from == '\\') { |
| 103 | if (from[1] == delim) |
| 104 | from++; |
| 105 | else if (from[1] == '\\') |
| 106 | *to++ = *from++; |
| 107 | } |
| 108 | else if (*from == delim) |
| 109 | break; |
| 110 | *to = *from; |
| 111 | } |
| 112 | *to = '\0'; |
| 113 | return from; |
| 114 | } |
| 115 | |
| 116 | |
| 117 | char * |
| 118 | cpy2(register char *to, register char *from, register int delim) |
| 119 | { |
| 120 | for (; *from; from++,to++) { |
| 121 | if (*from == '\\') |
| 122 | *to++ = *from++; |
| 123 | else if (*from == '$') |
| 124 | *to++ = '\\'; |
| 125 | else if (*from == delim) |
| 126 | break; |
| 127 | *to = *from; |
| 128 | } |
| 129 | *to = '\0'; |
| 130 | return from; |
| 131 | } |
| 132 | |
| 133 | /* return ptr to little string in big string, NULL if not found */ |
| 134 | |
| 135 | char * |
| 136 | instr(char *big, char *little) |
| 137 | { |
| 138 | register char *t, *s, *x; |
| 139 | |
| 140 | for (t = big; *t; t++) { |
| 141 | for (x=t,s=little; *s; x++,s++) { |
| 142 | if (!*x) |
| 143 | return Nullch; |
| 144 | if (*s != *x) |
| 145 | break; |
| 146 | } |
| 147 | if (!*s) |
| 148 | return t; |
| 149 | } |
| 150 | return Nullch; |
| 151 | } |
| 152 | |
| 153 | /* copy a string to a safe spot */ |
| 154 | |
| 155 | char * |
| 156 | savestr(char *str) |
| 157 | { |
| 158 | register char *newaddr = (char *) safemalloc((MEM_SIZE)(strlen(str)+1)); |
| 159 | |
| 160 | (void)strcpy(newaddr,str); |
| 161 | return newaddr; |
| 162 | } |
| 163 | |
| 164 | /* grow a static string to at least a certain length */ |
| 165 | |
| 166 | void |
| 167 | growstr(char **strptr, int *curlen, int newlen) |
| 168 | { |
| 169 | if (newlen > *curlen) { /* need more room? */ |
| 170 | if (*curlen) |
| 171 | *strptr = (char *) saferealloc(*strptr,(MEM_SIZE)newlen); |
| 172 | else |
| 173 | *strptr = (char *) safemalloc((MEM_SIZE)newlen); |
| 174 | *curlen = newlen; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | void |
| 179 | croak(char *pat,...) |
| 180 | { |
| 181 | #if defined(HAS_VPRINTF) |
| 182 | va_list args; |
| 183 | |
| 184 | va_start(args, pat); |
| 185 | vfprintf(stderr,pat,args); |
| 186 | #else |
| 187 | fprintf(stderr,pat,a1,a2,a3,a4); |
| 188 | #endif |
| 189 | exit(1); |
| 190 | } |
| 191 | |
| 192 | void |
| 193 | fatal(char *pat,...) |
| 194 | { |
| 195 | #if defined(HAS_VPRINTF) |
| 196 | va_list args; |
| 197 | |
| 198 | va_start(args, pat); |
| 199 | vfprintf(stderr,pat,args); |
| 200 | #else |
| 201 | fprintf(stderr,pat,a1,a2,a3,a4); |
| 202 | #endif |
| 203 | exit(1); |
| 204 | } |
| 205 | |
| 206 | void |
| 207 | warn(char *pat,...) |
| 208 | { |
| 209 | #if defined(HAS_VPRINTF) |
| 210 | va_list args; |
| 211 | |
| 212 | va_start(args, pat); |
| 213 | vfprintf(stderr,pat,args); |
| 214 | #else |
| 215 | fprintf(stderr,pat,a1,a2,a3,a4); |
| 216 | #endif |
| 217 | } |
| 218 | |