1 | #include <stdio.h> |
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2 | #include <string.h> |
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3 | #include <stdlib.h> |
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4 | #include "owl.h" |
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5 | |
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6 | int owl_text_truncate_lines(char *out, char *in, int aline, int lines) { |
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7 | /* start with line aline (where the first line is 1) and print |
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8 | * 'lines' lines |
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9 | */ |
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10 | char *ptr1, *ptr2; |
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11 | int i; |
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12 | |
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13 | strcpy(out, ""); |
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14 | |
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15 | if (aline==0) aline=1; /* really illegal use */ |
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16 | |
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17 | /* find the starting line */ |
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18 | ptr1=in; |
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19 | if (aline!=1) { |
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20 | for (i=0; i<aline-1; i++) { |
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21 | ptr1=strchr(ptr1, '\n'); |
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22 | if (!ptr1) return(-1); |
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23 | ptr1++; |
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24 | } |
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25 | } |
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26 | /* ptr1 now holds the starting point */ |
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27 | |
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28 | /* copy in the next 'lines' lines */ |
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29 | if (lines<1) return(-1); |
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30 | |
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31 | for (i=0; i<lines; i++) { |
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32 | ptr2=strchr(ptr1, '\n'); |
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33 | if (!ptr2) { |
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34 | strcat(out, ptr1); |
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35 | return(-1); |
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36 | } |
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37 | strncat(out, ptr1, ptr2-ptr1+1); |
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38 | ptr1=ptr2+1; |
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39 | } |
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40 | return(0); |
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41 | } |
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42 | |
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43 | void owl_text_truncate_cols(char *out, char *in, int acol, int bcol) { |
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44 | char *ptr1, *ptr2, *tmpbuff, *last; |
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45 | int len; |
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46 | |
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47 | /* the first column is column 0 */ |
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48 | |
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49 | /* the message is expected to end in a new line for now */ |
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50 | |
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51 | tmpbuff=owl_malloc(strlen(in)+20); |
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52 | |
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53 | strcpy(tmpbuff, ""); |
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54 | last=in+strlen(in)-1; |
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55 | ptr1=in; |
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56 | while (ptr1<last) { |
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57 | ptr2=strchr(ptr1, '\n'); |
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58 | if (!ptr2) { |
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59 | /* but this shouldn't happen if we end in a \n */ |
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60 | break; |
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61 | } |
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62 | |
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63 | if (ptr2==ptr1) { |
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64 | strcat(tmpbuff, "\n"); |
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65 | ptr1++; |
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66 | continue; |
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67 | } |
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68 | |
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69 | /* we need to check that we won't run over here */ |
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70 | if ( (ptr2-ptr1) < (bcol-acol) ) { |
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71 | len=ptr2-(ptr1+acol); |
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72 | } else { |
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73 | len=bcol-acol; |
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74 | } |
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75 | if ((ptr1+len)>=last) { |
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76 | len-=last-(ptr1+len); |
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77 | } |
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78 | |
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79 | strncat(tmpbuff, ptr1+acol, len); |
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80 | strcat(tmpbuff, "\n"); |
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81 | |
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82 | ptr1=ptr2+1; |
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83 | } |
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84 | strcpy(out, tmpbuff); |
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85 | owl_free(tmpbuff); |
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86 | } |
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87 | |
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88 | |
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89 | void owl_text_indent(char *out, char *in, int n) { |
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90 | char *ptr1, *ptr2, *last; |
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91 | int i; |
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92 | |
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93 | strcpy(out, ""); |
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94 | |
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95 | last=in+strlen(in)-1; |
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96 | ptr1=in; |
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97 | while (ptr1<=last) { |
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98 | for (i=0; i<n; i++) { |
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99 | strcat(out, " "); |
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100 | } |
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101 | ptr2=strchr(ptr1, '\n'); |
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102 | if (!ptr2) { |
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103 | strcat(out, ptr1); |
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104 | break; |
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105 | } else { |
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106 | strncat(out, ptr1, ptr2-ptr1+1); |
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107 | } |
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108 | ptr1=ptr2+1; |
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109 | } |
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110 | } |
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111 | |
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112 | |
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113 | int owl_text_num_lines(char *in) { |
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114 | int lines, i; |
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115 | |
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116 | lines=0; |
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117 | for (i=0; in[i]!='\0'; i++) { |
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118 | if (in[i]=='\n') lines++; |
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119 | } |
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120 | |
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121 | /* if the last char wasn't a \n there's one more line */ |
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122 | if (in[i-1]!='\n') lines++; |
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123 | |
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124 | return(lines); |
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125 | } |
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126 | |
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